DataGridView控件用法合集
1. 當前的單元格屬性取得、變更
[C#]
//顯示當前單元格的值
Console.WriteLine(DataGridView1.CurrentCell.Value);
//顯示當前單元格的列索引
Console.WriteLine(DataGridView1.CurrentCell.ColumnIndex);
//顯示當前單元格的行索引
Console.WriteLine(DataGridView1.CurrentCell.RowIndex);
//（0，0）為現在的單元格
DataGridView1.CurrentCell = DataGridView1[0, 0];
2. 編輯屬性
全部單元格編輯屬性
[C#]
//讀取DataGridView 1的單元格
DataGridView1.ReadOnly = true;
指定行列單元格編輯屬性
[C#]
/讀DataGridView 1的第二列
DataGridView1.Columns[1].ReadOnly = true;
//使DataGridView1的第三行為只讀
DataGridView1.Rows[2].ReadOnly = true;
//讀取DataGridView 1的（0，0）的單元格
DataGridView1[0, 0].ReadOnly = true;
根據條件判斷單元格的編輯屬性
下例中column2的值是True的時候，Column1設為可編輯
[C#]
//CellBeginEdit事件處理程序
private void DataGridView1_CellBeginEdit(object sender,
DataGridViewCellCancelEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
//判斷是否能編輯
if (dgv.Columns[e.ColumnIndex].Name == "Column1" &&
!(bool)dgv["Column2", e.RowIndex].Value)
{
//不可編輯
e.Cancel = true;
}}
3. 最下面一列新追加行非表示
3.DataGridView最下面一列新追加行非表示
[C#]
//用戶不能將新的行添加到DataGridView 1
DataGridView1.AllowUserToAddRows = false;
4. 判斷當前選中行是否為新追加的行
[C#]
if (DataGridView1.CurrentRow.IsNewRow)
Console.WriteLine("有現在的單元格的行是新的行");
else
Console.WriteLine("現在的電池有行，新行嗎。");
5.刪除行可否設定
[C#]
//DataGridView一行用戶刪除不了的
DataGridView1.AllowUserToDeleteRows = false;
根據條件判斷當前行是否要刪除
[C#]
//DataGridView 1的UserDeleting Rime事件韓劇
private void DataGridView1_UserDeletingRow(
object sender, DataGridViewRowCancelEventArgs e)
{
//刪除或確認用戶
if (MessageBox.Show("您要刪除這一列嗎？",
"確認刪除",
MessageBoxButtons.OKCancel,
MessageBoxIcon.Question) != DialogResult.OK)
{
e.Cancel = true;
}
}
6. 行列不表示和刪除
行列不表示
[C#]
//隱藏包含DataGridView1的列
DataGridView1.Columns[0].Visible = false;
//非顯示DataGridView 1的行
DataGridView1.Rows[0].Visible = false;
行列表頭部分不表示
[C#]
//隱藏列標題
DataGridView1.ColumnHeadersVisible = false;
//非顯示行頁眉
DataGridView1.RowHeadersVisible = false;
指定行列刪除
[C#]
//"刪除列1
DataGridView1.Columns.Remove("Column1");
//刪除開始列
DataGridView1.Columns.RemoveAt(0);
//刪除最初的行
DataGridView1.Rows.RemoveAt(0);
選擇的行列刪除（多行列）
[C#]
//刪除所有在DataGridView 1所選擇的行
foreach (DataGridViewRow r in DataGridView1.SelectedRows)
{
if (!r.IsNewRow)
{
DataGridView1.Rows.Remove(r);
}
}
7. 行列寬度高度設置為不能編輯
[C#]
//用戶不能改變DataGridView 1的列的寬度
DataGridView1.AllowUserToResizeColumns = false;
//防止用戶更改DataGridView1行的高度
DataGridView1.AllowUserToResizeRows = false;
指定行列寬度高度設置為不能編輯
[C#]
//讓用戶無法改變DataGridView 1的列的寬度
DataGridView1.Columns[0].Resizable = DataGridViewTriState.False;
//防止用戶更改DataGridView1的第一行的高度
DataGridView1.Rows[0].Resizable = DataGridViewTriState.False;
列幅行高最小值設定
[C#]
//以最開始的列的寬度最小為100像素
DataGridView1.Columns[0].MinimumWidth = 100;
//以第一個行的高度最小為50個像素
DataGridView1.Rows[0].MinimumHeight = 50;
行列表頭部分行高列幅設置為不能編輯
[C#]
//阻止更改列標題的高度
DataGridView1.ColumnHeadersHeightSizeMode =
DataGridViewColumnHeadersHeightSizeMode.DisableResizing;
//調整行頁眉的寬度
DataGridView1.RowHeadersWidthSizeMode =
DataGridViewRowHeadersWidthSizeMode.EnableResizing;
8. 行高列幅自動調整
[C#]
//根據頁眉和所有單元格的內容，自動調整列的寬度
DataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
//根據標題和所有單元格內容自動調整行高度
DataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;
表頭部分行高列幅自動調整
[C#]
//自動調整列標題的高度
DataGridView1.ColumnHeadersHeightSizeMode =
DataGridViewColumnHeadersHeightSizeMode.AutoSize;
//自動調整行標題的寬度
DataGridView1.RowHeadersWidthSizeMode =
DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders;
指定列自動調整
[C#]
//自動調整前列的寬度
DataGridView1.Columns[0].AutoSizeMode =
DataGridViewAutoSizeColumnMode.DisplayedCells;
9. 指定行列凍結
列凍結（當前列以及左側做所有列）
[C#]
//固定DataGridView1的左側兩列
DataGridView1.Columns[1].Frozen = true;
行凍結（當前行以及上部所有行）
[C#]
//固定DataGridView 1的上部2行
DataGridView1.Rows[2].Frozen = true;
指定單元格凍結（單元格所在行上部分所有行，列左側所有列）
[C#]
DataGridView1[0, 0]. Frozen = true;
10. 列順序變更可否設定
[C#]
//用戶可以改變DataGridView 1的列的位置
DataGridView1.AllowUserToOrderColumns = true;
但是如果列凍結的情況下，凍結的部分不能變更到非凍結的部分。
變更后列位置取得
[C#]
//列“Column1”的當前位置
Console.WriteLine(DataGridView1.Columns["Column1"].DisplayIndex);
//排在前面的“Column1”
DataGridView1.Columns["Column1"].DisplayIndex = 0;
11. 行復數選擇
復數行選擇不可
[C#]
//在DataGridView 1中不選擇多個單元格，行，列
DataGridView1.MultiSelect = false;
單元格選擇的時候默認為選擇整行
[C#]
//選擇單元格並選擇整個行
DataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
12. 選擇的行、列、單元格取得
[C#]
//顯示選擇的單元格
Console.WriteLine("選擇的單元格");
foreach (DataGridViewCell c in DataGridView1.SelectedCells)
{
Console.WriteLine("{0}, {1}", c.ColumnIndex, c.RowIndex);
}
//顯示選擇的行
Console.WriteLine("被選擇的行");
foreach (DataGridViewRow r in DataGridView1.SelectedRows)
{
Console.WriteLine(r.Index);
}
//顯示選擇的列
Console.WriteLine("選擇的列");
foreach (DataGridViewColumn c in DataGridView1.SelectedColumns)
{
Console.WriteLine(c.Index);
}
指定行、列、單元格取得
[C#]
//選擇（0，0）的單元格
DataGridView1[0, 0].Selected = true;
//選擇索引1中的行
DataGridView1.Rows[1].Selected = true;
//選擇索引2中的列
DataGridView1.Columns[2].Selected = true;
13. 指定單元格是否表示
[C#]
if (!DataGridView1[0, 0].Displayed && DataGridView1[0, 0].Visible)
{
DataGridView1.CurrentCell = DataGridView1[0, 0];
}
14. 表頭部單元格取得
[C#]
//改變DataGridView 1的列的文本
DataGridView1.Columns[0].HeaderCell.Value = "開始列";
//改變DataGridView 1的行的文本
DataGridView1.Rows[0].HeaderCell.Value = "第一行";
//更改DataGridView1左上角單元格中的文本
DataGridView1.TopLeftHeaderCell.Value = "左上";
15. 表頭部單元格文字列設定
更改列Header表示文字列
[C#]
//改變DataGridView 1的列的文本
DataGridView1.Columns[0].HeaderText = "開始列";
更改行Header表示文字列
[C#]
//在DataGridView1的行標題中顯示行號
for (int i = 0; i < DataGridView1.Rows.Count; i++)
{
DataGridView1.Rows[i].HeaderCell.Value = i.ToString();
}
//自動調節行頁眉的寬度
DataGridView1.AutoResizeRowHeadersWidth(
DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders);
最左上Header單元格文字列
[C#]
//在左上角的標題單元格中顯示“/”
DataGridView1.TopLeftHeaderCell.Value = "/";
16. 選擇的部分拷貝至剪貼板
拷貝模式設定
[C#]
//不復制標題
DataGridView1.ClipboardCopyMode =
DataGridViewClipboardCopyMode.EnableWithoutHeaderText;
選中部分拷貝
[C#]
//將選定的單元格復制到剪貼板
Clipboard.SetDataObject(DataGridView1.GetClipboardContent());
17. 粘貼
[C#]
//從現在的單元格的行到下
if (DataGridView1.CurrentCell == null)
return;
int insertRowIndex = DataGridView1.CurrentCell.RowIndex;
//取得剪切板的內容，用行分開
string pasteText = Clipboard.GetText();
if (string.IsNullOrEmpty(pasteText))
return;
pasteText = pasteText.Replace("\r\n", "\n");
pasteText = pasteText.Replace('\r', '\n');
pasteText.TrimEnd(new char[] { '\n' });
string[] lines = pasteText.Split('\n');
bool isHeader = true;
foreach (string line in lines)
{
//列頁眉的話就飛
if (isHeader)
{
isHeader = false;
continue;
}
//分割標簽
string[] vals = line.Split('\t');
//調查列數合適
if (vals.Length - 1 != DataGridView1.ColumnCount)
throw new ApplicationException("列數不同。");
DataGridViewRow row = DataGridView1.Rows[insertRowIndex];
//設置頁眉
row.HeaderCell.Value = vals[0];
//設置各單元格的值
for (int i = 0; i < row.Cells.Count; i++)
{
row.Cells[i].Value = vals[i + 1];
}
//到下一行
insertRowIndex++;
}
18. 單元格上ToolTip表示設定(鼠標移動到相應單元格上時，彈出說明信息)
[C#]
//設置在單元格中顯示的ToolTip
DataGridView1[0, 0].ToolTipText = "このセルは変更できません";
//設置在列頁眉上顯示的ToolTip
DataGridView1.Columns[0].ToolTipText = "この列には數字を入力できます";
//設置在行頁眉上顯示的ToolTip
DataGridView1.Rows[0].HeaderCell.ToolTipText = "この行のセルは変更できません";
[C#]
//CellToolTipTextNeeded事件處理程序
private void DataGridView1_CellToolTipTextNeeded(object sender,
DataGridViewCellToolTipTextNeededEventArgs e)
{
e.ToolTipText = e.ColumnIndex.ToString() + ", " + e.RowIndex.ToString();
}
19. 中的ContextMenuStrip屬性
[C#]
//設定DataGridView的控制程序
DataGridView1.ContextMenuStrip = this.ContextMenuStrip1;
//設置列中的LayerMenuBarp
DataGridView1.Columns[0].ContextMenuStrip = this.ContextMenuStrip2;
//設置列頁眉的控制程序
DataGridView1.Columns[0].HeaderCell.ContextMenuStrip = this.ContextMenuStrip2;
//設置行的換行和條帶p
DataGridView1.Rows[0].ContextMenuStrip = this.ContextMenuStrip3;
//設定單元格的控制程序
DataGridView1[0, 1].ContextMenuStrip = this.ContextMenuStrip4;
也可以用CellContextMenuStripNeeded、RowContextMenuStripNeeded屬性進行定義
[C#]
//CellitMenuStripNeeded事件處理程序
private void DataGridView1_CellContextMenuStripNeeded(object sender,
DataGridViewCellContextMenuStripNeededEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
if (e.RowIndex < 0)
{
//設置在列頁眉上顯示的控制程序
e.ContextMenuStrip = this.ContextMenuStrip1;
}
else if (e.ColumnIndex < 0)
{
//設置在行標題中顯示的大綱視圖
e.ContextMenuStrip = this.ContextMenuStrip2;
}
else if (dgv[e.ColumnIndex, e.RowIndex].Value is int)
{
//更改單元格是整數類型時要顯示的大綱
e.ContextMenuStrip = this.ContextMenuStrip3;
}
}
20. 指定滾動框位置
[C#]
//滾動到開頭的行
DataGridView1.FirstDisplayedScrollingRowIndex = 0;
//滾動到第一列
DataGridView1.FirstDisplayedScrollingColumnIndex = 0;
21. 手動追加列
[C#]
//不要自動制作列
DataGridView1.AutoGenerateColumns = false;
//設置數據源
DataGridView1.DataSource = BindingSource1;
//制作DataGridViewTecxColumn列
DataGridViewTextBoxColumn textColumn = new DataGridViewTextBoxColumn();
//綁定數據源中的列1
textColumn.DataPropertyName = "Column1";
//設定名字和頁眉
textColumn.Name = "Column1";
textColumn.HeaderText = "Column1";
//添加列
DataGridView1.Columns.Add(textColumn);
22. 全體分界線樣式設置
[C#]
//將DataGridView的邊界線設置為3D
DataGridView1.BorderStyle = BorderStyle.Fixed3D;
單元格上下左右分界線樣式設置
[C#]
//把單元格的上和左邊分成兩條線的邊界線，
//向下和向右對齊一條重線的凹邊界線
DataGridView1.AdvancedCellBorderStyle.Top = DataGridViewAdvancedCellBorderStyle.InsetDouble;
DataGridView1.AdvancedCellBorderStyle.Right = DataGridViewAdvancedCellBorderStyle.Inset;
DataGridView1.AdvancedCellBorderStyle.Bottom = DataGridViewAdvancedCellBorderStyle.Inset;
DataGridView1.AdvancedCellBorderStyle.Left = DataGridViewAdvancedCellBorderStyle.InsetDouble;
23. 根據單元格屬性更改顯示內容
如下例，當該列是字符串時，自動轉換文字大小寫
[C#]
//Carelmatting事件韓劇
private void DataGridView1_CellFormatting(object sender,
DataGridViewCellFormattingEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
//確認單元格的列
if (dgv.Columns[e.ColumnIndex].Name == "Column1" && e.Value is string)
{
//以大寫形式顯示
string str = e.Value.ToString();
e.Value = str.ToUpper();
//通知您不需要格式化
e.FormattingApplied = true;
}
}
24. 新追加行的行高樣式設置的
行高設置
[C#]
//設置行模板的高度
DataGridView1.RowTemplate.Height = 50;
//設定行的最低高度
DataGridView1.RowTemplate.MinimumHeight = 50;
樣式設置
[C#]
//將行模板的單元格樣式為黃色
DataGridView1.DefaultCellStyle.BackColor = Color.Yellow;
25. 新追加行單元格默認值設置
[C#]
//DefaultValuesNeeded事件處理程序
private void DataGridView1_DefaultValuesNeeded(object sender,
DataGridViewRowEventArgs e)
{
//指定單元格的既定值
e.Row.Cells["Column1"].Value = 0;
e.Row.Cells["Column2"].Value = "-";
}
26. 單元格數據錯誤標簽表示
[C#]
//（0，0）的單元格顯示錯誤圖標
DataGridView1[0, 0].ErrorText = "請確認單元格的值";
//索引在三行中顯示錯誤圖標
DataGridView1.Rows[3].ErrorText = "不能輸入負值。";
在大量單元格需要錯誤提示時，也可以用CellErrorTextNeeded、RowErrorTextNeeded事件
[C#]
//CareErrorTectectentNER事件韓劇
private void DataGridView1_CellErrorTextNeeded(object sender,
DataGridViewCellErrorTextNeededEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
//如果單元格的值是負整數，則顯示錯誤圖標
object cellVal = dgv[e.ColumnIndex, e.RowIndex].Value;
if (cellVal is int && ((int)cellVal) < 0)
{
e.ErrorText = "不能輸入負整數。";
}
}
//RoErrorTectectentNER事件韓劇
private void DataGridView1_RowErrorTextNeeded(object sender,
DataGridViewRowErrorTextNeededEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
if (dgv["Column1", e.RowIndex].Value == DBNull.Value &&
dgv["Column2", e.RowIndex].Value == DBNull.Value)
{
e.ErrorText =
"請至少在Column1和Column2中輸入值。";
}
}
27. 單元格內輸入值正確性判斷
[C#]
//CellValidating事件處理程序
private void DataGridView1_CellValidating(object sender,
DataGridViewCellValidatingEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
if (dgv.Columns[e.ColumnIndex].Name == "Column1" &&
e.FormattedValue.ToString() == "")
{
//設置錯誤文本
dgv.Rows[e.RowIndex].ErrorText = "沒有輸入值";
//要取消輸入的值並將其還原為原始值，請執行以下操作：
dgv.CancelEdit();
//取消
e.Cancel = true;
}
}
//CareValidater事件漢劇
private void DataGridView1_CellValidated(object sender,
DataGridViewCellEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
//刪除錯誤文本
dgv.Rows[e.RowIndex].ErrorText = null;
}
28. 單元格輸入錯誤值事件的捕獲
[C#]
//DataError事件短劇
private void DataGridView1_DataError(object sender,
DataGridViewDataErrorEventArgs e)
{
if (e.Exception != null)
{
MessageBox.Show(this,
string.Format("({0}, {1}) 的單元格中發生錯誤。nn說明: {2}",
e.ColumnIndex, e.RowIndex, e.Exception.Message),
"發生錯誤",
MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
輸入錯誤值時返回原先數據
[C#]
//DataError事件短劇
private void DataGridView1_DataError(object sender,
DataGridViewDataErrorEventArgs e)
{
e.Cancel = false;
}
29. 行排序（點擊列表頭自動排序的設置）
[C#]
//阻止排序
foreach (DataGridViewColumn c in DataGridView1.Columns)
c.SortMode = DataGridViewColumnSortMode.NotSortable;
30. 自動行排序（新追加值也會自動排序）
[C#]
//格式的短劇
private void Form1_Load(object sender, EventArgs e)
{
//自動排列
foreach (DataGridViewColumn c in DataGridView1.Columns)
c.SortMode = DataGridViewColumnSortMode.Automatic;
}
//Button 1的Click事件韓劇
private void Button1_Click(object sender, EventArgs e)
{
if (DataGridView1.CurrentCell == null)
return;
//確定要重新排序的列
DataGridViewColumn sortColumn = DataGridView1.CurrentCell.OwningColumn;
//決定重新排列的方向（升序或降序）
ListSortDirection sortDirection = ListSortDirection.Ascending;
if (DataGridView1.SortedColumn != null &&
DataGridView1.SortedColumn.Equals(sortColumn))
{
sortDirection =
DataGridView1.SortOrder == SortOrder.Ascending ?
ListSortDirection.Descending : ListSortDirection.Ascending;
}
//排序
DataGridView1.Sort(sortColumn, sortDirection);
}
31. 自動行排序禁止情況下的排序
[C#]
//格式的短劇
private void Form1_Load(object sender, EventArgs e)
{
//添加事件處理程序
DataGridView1.RowsAdded += new DataGridViewRowsAddedEventHandler(
DataGridView1_RowsAdded);
DataGridView1.CellValueChanged += new DataGridViewCellEventHandler(
DataGridView1_CellValueChanged);
DataGridView1.ColumnHeaderMouseClick += new DataGridViewCellMouseEventHandler(
DataGridView1_ColumnHeaderMouseClick);
}
//ColumnHeaderMoug Click事件韓劇
private void DataGridView1_ColumnHeaderMouseClick(object sender,
DataGridViewCellMouseEventArgs e)
{
DataGridViewColumn clickedColumn = DataGridView1.Columns[e.ColumnIndex];
if (clickedColumn.SortMode != DataGridViewColumnSortMode.Automatic)
this.SortRows(clickedColumn, true);
}
//RATsAW事件漢劇
private void DataGridView1_RowsAdded(object sender,
DataGridViewRowsAddedEventArgs e)
{
this.SortRows(DataGridView1.SortedColumn, false);
}
//CellValueChangedイベントハンドラ
private void DataGridView1_CellValueChanged(object sender,
DataGridViewCellEventArgs e)
{
if (DataGridView1.SortedColumn != null &&
e.ColumnIndex == DataGridView1.SortedColumn.Index)
this.SortRows(DataGridView1.SortedColumn, false);
}
/// <summary>
/// 以指定的列為基准進行排序
/// </summary>
/// <param name="sortColumn">要參考的列</param>
/// <param name="orderToggle">把重新排列的方向改為角度</param>
private void SortRows(DataGridViewColumn sortColumn, bool orderToggle)
{
if (sortColumn == null)
return;
//清除以前的排序圖示符
if (sortColumn.SortMode == DataGridViewColumnSortMode.Programmatic &&
DataGridView1.SortedColumn != null &&
!DataGridView1.SortedColumn.Equals(sortColumn))
{
DataGridView1.SortedColumn.HeaderCell.SortGlyphDirection =
SortOrder.None;
}
//排序方向（升序或降序）
ListSortDirection sortDirection;
if (orderToggle)
{
sortDirection =
DataGridView1.SortOrder == SortOrder.Descending ?
ListSortDirection.Ascending : ListSortDirection.Descending;
}
else
{
sortDirection =
DataGridView1.SortOrder == SortOrder.Descending ?
ListSortDirection.Descending : ListSortDirection.Ascending;
}
SortOrder sortOrder =
sortDirection == ListSortDirection.Ascending ?
SortOrder.Ascending : SortOrder.Descending;
//排序排序排序
DataGridView1.Sort(sortColumn, sortDirection);
if (sortColumn.SortMode == DataGridViewColumnSortMode.Programmatic)
{
//變更排列網格
sortColumn.HeaderCell.SortGlyphDirection = sortOrder;
}
}
32. 指定列指定排序
[C#]
//獲得DataGridView 1的DataTable
DataTable dt = (DataTable)DataGridView1.DataSource;
//取得DataView
DataView dv = dt.DefaultView;
//在Column1和Column2中按升序排列
dv.Sort = "Column1, Column2 ASC";
//顯示在兩列的頁眉上替換的網格
DataGridView1.Columns["Column1"].HeaderCell.SortGlyphDirection =
SortOrder.Ascending;
DataGridView1.Columns["Column2"].HeaderCell.SortGlyphDirection =
SortOrder.Ascending;
33. 單元格樣式設置
指定行列的樣式設定
[C#]
//為0的列的單元格的背景顏色為水色
DataGridView1.Columns[0].DefaultCellStyle.BackColor = Color.Aqua;
//為0的行的單元格的背景色為薄灰色
DataGridView1.Rows[0].DefaultCellStyle.BackColor = Color.LightGray;
奇數行樣式設定
[C#]
//將奇數行的單元格的背景色變成黃綠顏色
DataGridView1.AlternatingRowsDefaultCellStyle.BackColor = Color.GreenYellow;
行，列表頭部的樣式設定
[C#]
//將列頁眉的背景顏色為眼角
DataGridView1.ColumnHeadersDefaultCellStyle.BackColor = Color.Ivory;
//將行頁眉的背景顏色作為陰影
DataGridView1.RowHeadersDefaultCellStyle.BackColor = Color.Lime;
樣式的優先順序
一般單元格的樣式優先順位
- DataGridViewCell.Style
- DataGridViewRow.DefaultCellStyle
- DataGridView.AlternatingRowsDefaultCellStyle
- DataGridView.RowsDefaultCellStyle
- DataGridViewColumn.DefaultCellStyle
- DataGridView.DefaultCellStyle
表頭部的樣式優先順位
- DataGridViewCell.Style
- DataGridView.RowHeadersDefaultCellStyle
- DataGridView.ColumnHeadersDefaultCellStyle
- DataGridView.DefaultCellStyle
下例說明
[C#]
//使第一列變成淡藍色
DataGridView1.Columns[0].DefaultCellStyle.BackColor = Color.Aqua;
//把所有列的背景顏色變成黃色
DataGridView1.RowsDefaultCellStyle.BackColor = Color.Yellow;
//使奇數行變成黃綠色
DataGridView1.AlternatingRowsDefaultCellStyle.BackColor = Color.GreenYellow;
//把第三行畫成粉紅色
DataGridView1.Rows[2].DefaultCellStyle.BackColor = Color.Pink;
//獲取自身的單元格樣式和繼承的單元格樣式的背景色
//第一列的單元格樣式
//表示“Acoa”和“[ Acoa ]”
Console.WriteLine(DataGridView1.Columns[0].DefaultCellStyle.BackColor);
Console.WriteLine(DataGridView1.Columns[0].InheritedStyle.BackColor);
//第一行的單元格樣式
//表示“Emp晚餐”和“[ Yellow ]”
Console.WriteLine(DataGridView1.Rows[0].DefaultCellStyle.BackColor);
Console.WriteLine(DataGridView1.Rows[0].InheritedStyle.BackColor);
//第二行的單元格樣式
//被顯示為“空白空間”和“GreenGreen黃蜂”
Console.WriteLine(DataGridView1.Rows[1].DefaultCellStyle.BackColor);
Console.WriteLine(DataGridView1.Rows[1].InheritedStyle.BackColor);
//第三行的單元格樣式
//被顯示為“CameraPinketal”和“BSPinketal”。
Console.WriteLine(DataGridView1.Rows[2].DefaultCellStyle.BackColor);
Console.WriteLine(DataGridView1.Rows[2].InheritedStyle.BackColor);
//（0，3）的單元格樣式
//被顯示為“空白空間”和“BSPink服務器之間”。
Console.WriteLine(DataGridView1[0, 2].Style.BackColor);
Console.WriteLine(DataGridView1[0, 2].InheritedStyle.BackColor);
復數行列的樣式設定
[C#]
//改變奇數列的背景顏色
//有效的方法
DataGridViewCellStyle cellStyle = new DataGridViewCellStyle();
cellStyle.BackColor = Color.Yellow;
for (int i = 0; i < DataGridView1.Columns.Count; i++)
{
if (i % 2 == 0)
DataGridView1.Columns[i].DefaultCellStyle = cellStyle;
}
//非效率的方法
for (int i = 0; i < DataGridView1.Columns.Count; i++)
{
if (i % 2 == 0)
DataGridView1.Columns[i].DefaultCellStyle.BackColor = Color.Yellow;
}
34. 文字表示位置的設定
單元格的設定
[C#]
//“Column1”列的單元格的文本的配置和上下左右都在中央
DataGridView1.Columns["Column1"].DefaultCellStyle.Alignment =
DataGridViewContentAlignment.MiddleCenter;
表頭的設定
[C#]
//“Column1”列的頁眉的文本的配置和上下左右都在中央
DataGridView1.Columns["Column1"].HeaderCell.Style.Alignment =
DataGridViewContentAlignment.MiddleCenter;
35. 單元格內文字列換行
[C#]
//“Column1”列的單元格文本顯示
DataGridView1.Columns["Column1"].DefaultCellStyle.WrapMode =
DataGridViewTriState.True;
//頁眉也返回顯示，如下
DataGridView1.Columns["Column1"].HeaderCell.Style.WrapMode =
DataGridViewTriState.True;
36. 單元格DBNull值表示的設定
[C#]
DataGridView1.DefaultCellStyle.NullValue = "（未指定）";
單元格內NullValue屬性設定的值輸入，表示單元格內為Null值
[C#]
DataGridView1.DefaultCellStyle.NullValue = "-";
DataGridView1.DefaultCellStyle.DataSourceNullValue = "X";
37. 單元格樣式格式化
[C#]
//列的單元格中的文本格式指定為地區貨幣
DataGridView1.Columns[0].DefaultCellStyle.Format = "c";
DataGridView1.Columns[1].DefaultCellStyle.Format = "c";
//改變第二列的紋理
DataGridView1.Columns[1].DefaultCellStyle.FormatProvider =
new System.Globalization.CultureInfo("en-US");
38. 指定單元格顏色設定
光標下的單元格顏色自動變換
[C#]
//DataGridView1的CellMouseEnter事件處理程序
private void DataGridView1_CellMouseEnter(object sender,
DataGridViewCellEventArgs e)
{
//頁眉以外的單元格
if (e.ColumnIndex >= 0 && e.RowIndex >= 0)
{
DataGridView dgv = (DataGridView)sender;
//改變單元格樣式
dgv[e.ColumnIndex, e.RowIndex].Style.BackColor = Color.Red;
dgv[e.ColumnIndex, e.RowIndex].Style.SelectionBackColor = Color.Red;
}
}
//DataGridView 1的CareMouy Lita活動漢劇
private void DataGridView1_CellMouseLeave(object sender,
DataGridViewCellEventArgs e)
{
//頁眉以外的單元格
if (e.ColumnIndex >= 0 && e.RowIndex >= 0)
{
DataGridView dgv = (DataGridView)sender;
//恢復單元格樣式
//刪除單元格樣式時，可以設置null
dgv[e.ColumnIndex, e.RowIndex].Style.BackColor = Color.Empty;
dgv[e.ColumnIndex, e.RowIndex].Style.SelectionBackColor = Color.Empty;
}
}
表頭部單元格顏色設定
[C#]
//將列頁眉的背景顏色為黃色
DataGridView1.ColumnHeadersDefaultCellStyle.BackColor = Color.Yellow;
//將行頁眉的背景顏色變成黃綠顏色
DataGridView1.RowHeadersDefaultCellStyle.BackColor = Color.YellowGreen;
//將左上角的標題單元格的背景色設為藍色
DataGridView1.TopLeftHeaderCell.Style.BackColor = Color.Blue;
39. 單元格文字字體設置
光標下單元格字體設置為粗體
[C#]
//默認單元格樣式
private DataGridViewCellStyle defaultCellStyle;
//鼠標指針下面的單元格樣式
private DataGridViewCellStyle mouseCellStyle;
//格式的短劇
private void Form1_Load(object sender, EventArgs e)
{
//設置默認的單元格樣式
this.defaultCellStyle = new DataGridViewCellStyle();
//設置當前單元格的單元格樣式
this.mouseCellStyle = new DataGridViewCellStyle();
this.mouseCellStyle.Font = new Font(DataGridView1.Font,
DataGridView1.Font.Style | FontStyle.Bold);
}
//DataGridView 1的Caretal事件韓劇
private void DataGridView1_CellEnter(object sender,
DataGridViewCellEventArgs e)
{
//頁眉以外的單元格
if (e.ColumnIndex >= 0 && e.RowIndex >= 0)
{
DataGridView dgv = (DataGridView)sender;
//改變單元格樣式
dgv[e.ColumnIndex, e.RowIndex].Style = this.mouseCellStyle;
}
}
//DataGridView 1的Celealae活動韓劇
private void DataGridView1_CellLeave(object sender,
DataGridViewCellEventArgs e)
{
//頁眉以外的單元格
if (e.ColumnIndex >= 0 && e.RowIndex >= 0)
{
DataGridView dgv = (DataGridView)sender;
//恢復單元格樣式
//刪除單元格樣式時，可以設置null
dgv[e.ColumnIndex, e.RowIndex].Style = this.defaultCellStyle;
}
}
40. 根據單元格值設定單元格樣式
單元格負數情況下顯示黃色，0的情況下顯示紅色
[C#]
// Celermatting事件韓劇
private void DataGridView1_CellFormatting(object sender,
DataGridViewCellFormattingEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
//確認單元格的列
if (dgv.Columns[e.ColumnIndex].Name == "Column1" && e.Value is int)
{
int val = (int)e.Value;
//根據單元格的值，改變背景顏色る
if (val < 0)
{
e.CellStyle.BackColor = Color.Yellow;
}
else if (val == 0)
{
e.CellStyle.BackColor = Color.Red;
}
}
}
41. 設置單元格背景顏色
[C#]
//CarePainting事件韓劇
private void DataGridView1_CellPainting(object sender,
DataGridViewCellPaintingEventArgs e)
{
//在頁眉以外的單元格中，繪制背景時
if (e.ColumnIndex >= 0 && e.RowIndex >= 0 &&
(e.PaintParts & DataGridViewPaintParts.Background) ==
DataGridViewPaintParts.Background)
{
//檢查選擇，決定顏色
//bColor 1開始顏色，bColor 2結束顏色
Color bColor1, bColor2;
if ((e.PaintParts & DataGridViewPaintParts.SelectionBackground) ==
DataGridViewPaintParts.SelectionBackground &&
(e.State & DataGridViewElementStates.Selected) ==
DataGridViewElementStates.Selected)
{
bColor1 = e.CellStyle.SelectionBackColor;
bColor2 = Color.Black;
}
else
{
bColor1 = e.CellStyle.BackColor;
bColor2 = Color.LemonChiffon;
}
//制作漸變刷
using (System.Drawing.Drawing2D.LinearGradientBrush b =
new System.Drawing.Drawing2D.LinearGradientBrush(
e.CellBounds, bColor1, bColor2,
System.Drawing.Drawing2D.LinearGradientMode.Horizontal))
{
//把單元格塗碎
e.Graphics.FillRectangle(b, e.CellBounds);
}
//顯示背景以外
DataGridViewPaintParts paintParts =
e.PaintParts & ~DataGridViewPaintParts.Background;
//繪制單元格
e.Paint(e.ClipBounds, paintParts);
//通知繪制完成
e.Handled = true;
}
}
單元格背景顯示圖像
[C#]
//顯示在單元格背景下的圖像
private Bitmap cellBackImage = new Bitmap("C:\\back.gif");
//CarePainting事件韓劇
private void DataGridView1_CellPainting(object sender,
DataGridViewCellPaintingEventArgs e)
{
//在頁眉以外的單元格中，繪制背景時
if (e.ColumnIndex >= 0 && e.RowIndex >= 0 &&
(e.PaintParts & DataGridViewPaintParts.Background) ==
DataGridViewPaintParts.Background)
{
//只繪制背景
DataGridViewPaintParts backParts = e.PaintParts &
(DataGridViewPaintParts.Background |
DataGridViewPaintParts.SelectionBackground);
e.Paint(e.ClipBounds, backParts);
//在單元格中心繪制圖像
int x = e.CellBounds.X +
(e.CellBounds.Width - cellBackImage.Width) / 2;
int y = e.CellBounds.Y +
(e.CellBounds.Height - cellBackImage.Height) / 2;
e.Graphics.DrawImage(cellBackImage, x, y);
//顯示背景以外
DataGridViewPaintParts paintParts =
e.PaintParts & ~backParts;
//繪制單元格
e.Paint(e.ClipBounds, paintParts);
//通知繪制完成
e.Handled = true;
}
}
42. 行樣式描畫
利用RowPostPaint事件描畫
[C#]
//RowPostPaint事件處理程序
private void DataGridView1_RowPostPaint(object sender,
DataGridViewRowPostPaintEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
//確定線條的顏色
Pen linePen;
switch (e.RowIndex % 3)
{
case 0:
linePen = Pens.Blue;
break;
case 1:
linePen = Pens.Green;
break;
default:
linePen = Pens.Red;
break;
}
//計算划線的位置
int startX = dgv.RowHeadersVisible ? dgv.RowHeadersWidth : 0;
int startY = e.RowBounds.Top + e.RowBounds.Height - 1;
int endX = startX + dgv.Columns.GetColumnsWidth(
DataGridViewElementStates.Visible) -
dgv.HorizontalScrollingOffset;
//划線
e.Graphics.DrawLine(linePen,
startX, startY, endX, startY);
}
利用RowPrePaint事件描畫
[C#]
//RowPrePaint事件處理程序private void DataGridView1_RowPrePaint(object sender,
DataGridViewRowPrePaintEventArgs e)
{
//繪制背景
if ((e.PaintParts & DataGridViewPaintParts.Background) ==
DataGridViewPaintParts.Background)
{
//檢查選擇，決定顏色
//bColor 1開始顏色，bColor 2結束顏色
Color bColor1, bColor2;
if ((e.PaintParts & DataGridViewPaintParts.SelectionBackground) ==
DataGridViewPaintParts.SelectionBackground &&
(e.State & DataGridViewElementStates.Selected) ==
DataGridViewElementStates.Selected)
{
bColor1 = e.InheritedRowStyle.SelectionBackColor;
bColor2 = Color.Black;
}
else
{
bColor1 = e.InheritedRowStyle.BackColor;
bColor2 = Color.YellowGreen;
}
//計算漸變的范圍
//只繪制不包含標題的單元格區域
DataGridView dgv = (DataGridView)sender;
int rectLeft2 = dgv.RowHeadersVisible ? dgv.RowHeadersWidth : 0;
int rectLeft = rectLeft2 - dgv.HorizontalScrollingOffset;
int rectWidth = dgv.Columns.GetColumnsWidth(
DataGridViewElementStates.Visible);
Rectangle rect = new Rectangle(rectLeft, e.RowBounds.Top,
rectWidth, e.RowBounds.Height - 1);
//制作漸變刷
using (System.Drawing.Drawing2D.LinearGradientBrush b =
new System.Drawing.Drawing2D.LinearGradientBrush(
rect, bColor1, bColor2,
System.Drawing.Drawing2D.LinearGradientMode.Horizontal))
{
//計算要繪制的范圍
rect.X = rectLeft2;
rect.Width -= dgv.HorizontalScrollingOffset;
//把單元格塗碎
e.Graphics.FillRectangle(b, rect);
}
//繪制頁眉
e.PaintHeader(true);
//不繪制背景
e.PaintParts &= ~DataGridViewPaintParts.Background;
}
}
//ColumnWidthChanged事件處理程序
private void DataGridView1_ColumnWidthChanged(object sender,
DataGridViewColumnEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
dgv.Invalidate();
}
43. 顯示行號
[C#]
//CarePainting事件韓劇
private void DataGridView1_CellPainting(object sender,
DataGridViewCellPaintingEventArgs e)
{
//檢查列標題
if (e.ColumnIndex < 0 && e.RowIndex >= 0)
{
//繪制單元格
e.Paint(e.ClipBounds, DataGridViewPaintParts.All);
//確定繪制行號的范圍
//e . AXestiBordersteryle和e . Cirstyle . Padding是無視的
Rectangle indexRect = e.CellBounds;
indexRect.Inflate(-2, -2);
//繪制行號
TextRenderer.DrawText(e.Graphics,
(e.RowIndex + 1).ToString(),
e.CellStyle.Font,
indexRect,
e.CellStyle.ForeColor,
TextFormatFlags.Right | TextFormatFlags.VerticalCenter);
//通知繪制完成
e.Handled = true;
}
}
利用RowPostPaint事件描畫
[C#]
//RowPostPaint事件處理程序
private void DataGridView1_RowPostPaint(object sender,
DataGridViewRowPostPaintEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
if (dgv.RowHeadersVisible)
{
//確定繪制行號的范圍
Rectangle rect = new Rectangle(
e.RowBounds.Left, e.RowBounds.Top,
dgv.RowHeadersWidth, e.RowBounds.Height);
rect.Inflate(-2, -2);
//繪制行號
TextRenderer.DrawText(e.Graphics,
(e.RowIndex + 1).ToString(),
e.InheritedRowStyle.Font,
rect,
e.InheritedRowStyle.ForeColor,
TextFormatFlags.Right | TextFormatFlags.VerticalCenter);
}
}
44. 焦點所在單元格焦點框不顯示的設定
[C#]
//CarePainting事件韓劇
private void DataGridView1_CellPainting(object sender,
DataGridViewCellPaintingEventArgs e)
{
//非標題時
if (e.ColumnIndex >= 0 && e.RowIndex >= 0)
{
//顯示除了聚焦框以外
DataGridViewPaintParts paintParts =
e.PaintParts & ~DataGridViewPaintParts.Focus;
//繪制單元格
e.Paint(e.ClipBounds, paintParts);
//通知繪制完成
e.Handled = true;
}
}
利用RowPrePaint事件實現
[C#]
//RowPrePaint事件處理程序
private void DataGridView1_RowPrePaint(object sender,
DataGridViewRowPrePaintEventArgs e)
{
//不繪制焦點框架
e.PaintParts &= ~DataGridViewPaintParts.Focus;
}
45. 列中顯示選擇框CheckBox
[C#]
//添加CheckBx列
DataGridViewCheckBoxColumn column = new DataGridViewCheckBoxColumn();
DataGridView1.Columns.Add(column);
中間狀態在內的三種狀態表示
[C#]
//顯示3種檢查狀態
DataGridViewCheckBoxColumn column =
(DataGridViewCheckBoxColumn)DataGridView1.Columns[0];
column.ThreeState = true;
46. 中顯示下拉框ComboBox
[C#]
//制作DataGridViewampColumn
DataGridViewComboBoxColumn column = new DataGridViewComboBoxColumn();
//指定在ComboBox的列表中顯示的項目
column.Items.Add("日曜日");
column.Items.Add("月曜日");
column.Items.Add("火曜日");
column.Items.Add("水曜日");
column.Items.Add("木曜日");
column.Items.Add("金曜日");
column.Items.Add("土曜日");
//顯示“Week”列中綁定的數據
column.DataPropertyName = "Week";
//顯示ComboBox列而不是“Week”列
DataGridView1.Columns.Insert(DataGridView1.Columns["Week"].Index, column);
DataGridView1.Columns.Remove("Week");
column.Name = "Week";
通過列Data綁定設置ComboBox
[C#]
//創建一個用於在ComboBox中顯示的列表
DataTable weekTable = new DataTable("WeekTable");
weekTable.Columns.Add("Display", typeof(string));
weekTable.Columns.Add("Value", typeof(int));
weekTable.Rows.Add("日曜日", 0);
weekTable.Rows.Add("月曜日", 1);
weekTable.Rows.Add("火曜日", 2);
weekTable.Rows.Add("水曜日", 3);
weekTable.Rows.Add("木曜日", 4);
weekTable.Rows.Add("金曜日", 5);
weekTable.Rows.Add("土曜日", 6);
//制作DataGridViewampColumn
DataGridViewComboBoxColumn column = new DataGridViewComboBoxColumn();
//顯示“Week”列中綁定的數據
column.DataPropertyName = "Week";
//設定DataGridViewampColumn的Datasouru
column.DataSource = weekTable;
//實際值為“值”列，顯示的文本為“顯示”列
column.ValueMember = "Value";
column.DisplayMember = "Display";
//添加到DataGridView1
DataGridView1.Columns.Add(column);
默認狀態下，所有下拉框都顯示；DisplayStyleForCurrentCellOnly＝True的狀態下，當前的單元格顯示下拉框，其余不顯示；還有一種就是光標移動時強調顯示。如下圖左中右三列。
47. 單擊打開下拉框
通常情況下要打開下拉框需要點擊目標單元格三次，第一次選中單元格，第二次進入編輯狀態，第三次才能打開下拉框
[C#]
//Caretal事件韓劇
private void DataGridView1_CellEnter(object sender,
DataGridViewCellEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
if (dgv.Columns[e.ColumnIndex].Name == "ComboBox" &&
dgv.Columns[e.ColumnIndex] is DataGridViewComboBoxColumn)
{
SendKeys.Send("{F4}");
}
}
48. 中顯示按鈕
[C#]
// DataGridViewButtonColumn的制作
DataGridViewButtonColumn column = new DataGridViewButtonColumn();
//設置列的名稱
column.Name = "Button";
/ /在所有的按鈕上顯示“詳細閱覽”
column.UseColumnTextForButtonValue = true;
column.Text = "詳細閱覽";
添加到//DataGridView
DataGridView1.Columns.Add(column);
按鈕按下事件取得
[C#]
//Celertent Click事件韓劇
private void DataGridView1_CellContentClick(object sender,
DataGridViewCellEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
//“Button”列的話，按鈕被點擊了
if (dgv.Columns[e.ColumnIndex].Name == "Button")
{
MessageBox.Show(e.RowIndex.ToString() +
"行的按鈕被點擊了");
}
}
49. 中顯示鏈接
[C#]
//創建DataGridViewLinkColumn
DataGridViewLinkColumn column = new DataGridViewLinkColumn();
//設置列的名稱
column.Name = "Link";
//在所有鏈接上顯示“詳細閱覽”
column.UseColumnTextForLinkValue = true;
column.Text = "詳細閱覽";
//鼠標指針在鏈接上的時候只需下線
column.LinkBehavior = LinkBehavior.HoverUnderline;
//自動訪問
//默認
column.TrackVisitedState = true;
//添加到DataGridView
DataGridView1.Columns.Add(column);
鏈接按下事件取得
[C#]
//Celertent Click事件韓劇
private void DataGridView1_CellContentClick(object sender,
DataGridViewCellEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
//“Link”列的話，按鈕被點擊了
if (dgv.Columns[e.ColumnIndex].Name == "Link")
{
MessageBox.Show(e.RowIndex.ToString() +
"單擊行中的鏈接。");
//訪問
DataGridViewLinkCell cell =
(DataGridViewLinkCell)dgv[e.ColumnIndex, e.RowIndex];
cell.LinkVisited = true;
}
}
50. 中顯示圖像
[C#]
//創建DataGridViewImageColumn
DataGridViewImageColumn column = new DataGridViewImageColumn();
//設置列的名稱
column.Name = "Image";
//不是Icon型，而是顯示Image型的數據
//默認False變更的，所以沒有必要
column.ValuesAreIcons = false;
//設置顯示在沒有設定值的單元格中的圖像
column.Image = new Bitmap("C:\\null.gif");
//保持垂直比例，放大顯示圖像
column.ImageLayout = DataGridViewImageCellLayout.Zoom;
//圖像說明
//將單元格復制到剪切板時使用
column.Description = "圖像";
//添加到DataGridView
DataGridView1.Columns.Add(column);
//更改“圖像”列頂部的單元格圖像
DataGridView1["Image", 0].Value = new Bitmap("C:\\top.gif");
圖片屬性單元格未設值時紅差不顯示的設定
[C#]
//獲取圖像列
DataGridViewImageColumn imageColumn =
(DataGridViewImageColumn)DataGridView1.Columns["Image"];
//將單元格樣式的NullValue設置為null
imageColumn.DefaultCellStyle.NullValue = null;
51. 編輯中單元格控件取得
[C#]
//Editing聯合活動韓劇
private void DataGridView1_EditingControlShowing(object sender,
DataGridViewEditingControlShowingEventArgs e)
{
//檢查顯示的控件是否為DataGridViewTextBoxEditingControl
if (e.Control is DataGridViewTextBoxEditingControl)
{
DataGridView dgv = (DataGridView)sender;
//獲得編輯所顯示的控制
DataGridViewTextBoxEditingControl tb =
(DataGridViewTextBoxEditingControl)e.Control;
/也可以如下
//TextBox tb = (TextBox)e.Control;
//通過列更改IME的模式
if (dgv.CurrentCell.OwningColumn.Name == "Column1")
tb.ImeMode = ImeMode.Disable;
else
tb.ImeMode = dgv.ImeMode;
}
}
其他控件以此類推，比如DataGridViewCheckBoxColumn或者DataGridViewButtonColumn等等。
52. 輸入自動完成
[C#]
AutoCompleteStringCollection autoCompleteSource =
new AutoCompleteStringCollection();
//Editing聯合活動韓劇
private void DataGridView1_EditingControlShowing(object sender,
DataGridViewEditingControlShowingEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
if (e.Control is TextBox)
{
//獲得編輯所顯示的文本框
TextBox tb = (TextBox)e.Control;
//相應地調查
if (dgv.CurrentCell.OwningColumn.Name == "Column1")
{
//啟用自動壓縮機
tb.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
tb.AutoCompleteSource = AutoCompleteSource.CustomSource;
tb.AutoCompleteCustomSource = this.autoCompleteSource;
}
else
{
//禁用自動完成
tb.AutoCompleteMode = AutoCompleteMode.None;
}
}
}
//DataSourceChanged事件韓劇
private void DataGridView1_DataSourceChanged(object sender, EventArgs e)
{
DataGridView dgv = (DataGridView)sender;
//初始化自動壓縮機列表
this.autoCompleteSource.Clear();
//將DataGridView中的數據添加到列表
foreach (DataGridViewRow r in dgv.Rows)
{
//獲取單元格值
string val = r.Cells["Column1"].Value as string;
if (!string.IsNullOrEmpty(val) &&
!this.autoCompleteSource.Contains(val))
{
//添加到自動壓縮機列表
autoCompleteSource.Add(val);
}
}
}
//CellValueChanged事件處理程序
private void DataGridView1_CellValueChanged(object sender,
DataGridViewCellEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
//相應地調查
if (dgv.Columns[e.ColumnIndex].Name == "Column1")
{
//獲取單元格值
string val = dgv[e.ColumnIndex, e.RowIndex].Value as string;
if (!string.IsNullOrEmpty(val) &&
!this.autoCompleteSource.Contains(val))
{
//添加到自動壓縮機列表
autoCompleteSource.Add(val);
}
}
}
53. 單元格編輯時鍵盤KEY事件取得
[C#]
//Editing聯合活動韓劇
private void DataGridView1_EditingControlShowing(object sender,
DataGridViewEditingControlShowingEventArgs e)
{
//檢查顯示的控件是否為DataGridViewTextBoxEditingControl
if (e.Control is DataGridViewTextBoxEditingControl)
{
DataGridView dgv = (DataGridView)sender;
//獲得編輯所顯示的控制
DataGridViewTextBoxEditingControl tb =
(DataGridViewTextBoxEditingControl)e.Control;
//刪除事件
tb.KeyPress -=
new KeyPressEventHandler(dataGridViewTextBox_KeyPress);
//相應地調查
if (dgv.CurrentCell.OwningColumn.Name == "Column1")
{
//添加KeyPress事件處理程序
tb.KeyPress +=
new KeyPressEventHandler(dataGridViewTextBox_KeyPress);
}
}
}
//在DataGridView中顯示的文本框的KeyPres事件
private void dataGridViewTextBox_KeyPress(object sender,
KeyPressEventArgs e)
{
//只需輸入數字
if (e.KeyChar < '0' || e.KeyChar > '9')
{
e.Handled = true;
}
}
54. 下拉框（ComboBox）單元格編輯時事件取得
[C#]
private DataGridViewComboBoxEditingControl dataGridViewComboBox = null;
//Editing聯合活動韓劇
private void DataGridView1_EditingControlShowing(object sender,
DataGridViewEditingControlShowingEventArgs e)
{
//顯示的控制是Dat a G r i d V V V V Viewamiting管理
if (e.Control is DataGridViewComboBoxEditingControl)
{
DataGridView dgv = (DataGridView)sender;
//相應地調查
if (dgv.CurrentCell.OwningColumn.Name == "ComboBox")
{
//獲得編輯所顯示的控制
this.dataGridViewComboBox =
(DataGridViewComboBoxEditingControl)e.Control;
//添加“SelectadIndeChanged事件”事件
this.dataGridViewComboBox.SelectedIndexChanged +=
new EventHandler(dataGridViewComboBox_SelectedIndexChanged);
}
}
}
//CellEndEdit事件處理程序
private void DataGridView1_CellEndEdit(object sender,
DataGridViewCellEventArgs e)
{
//刪除“SelectadIndeChanged事件”事件
if (this.dataGridViewComboBox != null)
{
this.dataGridViewComboBox.SelectedIndexChanged -=
new EventHandler(dataGridViewComboBox_SelectedIndexChanged);
this.dataGridViewComboBox = null;
}
}
//在DataGridView中顯示的轉換器的
//SelectadIndeChanged事件韓劇
private void dataGridViewComboBox_SelectedIndexChanged(object sender,
EventArgs e)
{
//顯示選擇的項目
DataGridViewComboBoxEditingControl cb =
(DataGridViewComboBoxEditingControl)sender;
Console.WriteLine(cb.SelectedItem);
}
55. 下拉框（ComboBox）單元格允許文字輸入設定
[C#]
//Editing聯合活動韓劇
private void DataGridView1_EditingControlShowing(object sender,
DataGridViewEditingControlShowingEventArgs e)
{
if (e.Control is DataGridViewComboBoxEditingControl)
{
//相應地調查
DataGridView dgv = (DataGridView)sender;
if (dgv.CurrentCell.OwningColumn.Name == "ComboBox")
{
//獲得編輯所顯示的控制
DataGridViewComboBoxEditingControl cb =
(DataGridViewComboBoxEditingControl)e.Control;
cb.DropDownStyle = ComboBoxStyle.DropDown;
}
}
}
//CellValidating事件處理程序
private void DataGridView1_CellValidating(object sender,
DataGridViewCellValidatingEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
//相應地調查
if (dgv.Columns[e.ColumnIndex].Name == "ComboBox" &&
dgv.Columns[e.ColumnIndex] is DataGridViewComboBoxColumn)
{
DataGridViewComboBoxColumn cbc =
(DataGridViewComboBoxColumn)dgv.Columns[e.ColumnIndex];
//添加到轉換器的項目
if (!cbc.Items.Contains(e.FormattedValue))
{
cbc.Items.Add(e.FormattedValue);
}
}
}
56. 根據值不同在另一列中顯示相應圖片
[C#]
using System;
using System.ComponentModel;
using System.Windows.Forms;
/// <summary>
/// 根據單元格的值，顯示適當的圖標
/// </summary>
public class DataGridViewErrorIconColumn : DataGridViewImageColumn
{
public DataGridViewErrorIconColumn()
{
this.CellTemplate = new DataGridViewErrorIconCell();
this.ValueType = this.CellTemplate.ValueType;
}
}
/// <summary>
///根據單元格的值，顯示適當的圖標
/// </summary>
public class DataGridViewErrorIconCell : DataGridViewImageCell
{
public DataGridViewErrorIconCell()
{
this.ValueType = typeof(int);
}
protected override object GetFormattedValue(
object value, int rowIndex,
ref DataGridViewCellStyle cellStyle,
TypeConverter valueTypeConverter,
TypeConverter formattedValueTypeConverter,
DataGridViewDataErrorContexts context)
{
//值為0時為信息，1時為警告，2時顯示錯誤圖標
switch ((int)value)
{
case 1:
return SystemIcons.Information;
case 2:
return SystemIcons.Warning;
case 3:
return SystemIcons.Error;
default:
return null;
}
}
public override object DefaultNewRowValue
{
get
{
return 0;
}
}
}
用法如下
[C#]
//制作DataGridViewErrorICOColumn
DataGridViewErrorIconColumn iconColumn =
new DataGridViewErrorIconColumn();
//拉攏Column一列（整數型）
iconColumn.DataPropertyName = "Column1";
//添加到DataGridView
DataGridView1.Columns.Add(iconColumn);
57. 中顯示進度條（ProgressBar）
[C#]
using System;
using System.Drawing;
using System.Windows.Forms;
/// <summary>
///DatagridViewchsBarCel對象列
/// </summary>
public class DataGridViewProgressBarColumn : DataGridViewTextBoxColumn
{
//轉換器
public DataGridViewProgressBarColumn()
{
this.CellTemplate = new DataGridViewProgressBarCell();
}
//檢索和設置CellTemplate。
public override DataGridViewCell CellTemplate
{
get
{
return base.CellTemplate;
}
set
{
//除了DataGridViewchsBarCel以外不做主機
if (!(value is DataGridViewProgressBarCell))
{
throw new InvalidCastException(
"DatagridViewchsBarCel對象" +
"請指定");
}
base.CellTemplate = value;
}
}
/// <summary>
/// 顯示的最大值的最大數量
/// </summary>
public int Maximum
{
get
{
return ((DataGridViewProgressBarCell)this.CellTemplate).Maximum;
}
set
{
if (this.Maximum == value)
return;
//更改單元格模板的值
((DataGridViewProgressBarCell)this.CellTemplate).Maximum =
value;
//改變已添加到DataGridView的單元格的值
if (this.DataGridView == null)
return;
int rowCount = this.DataGridView.RowCount;
for (int i = 0; i < rowCount; i++)
{
DataGridViewRow r = this.DataGridView.Rows.SharedRow(i);
((DataGridViewProgressBarCell)r.Cells[this.Index]).Maximum =
value;
}
}
}
/// <summary>
/// 最小值
/// </summary>
public int Mimimum
{
get
{
return ((DataGridViewProgressBarCell)this.CellTemplate).Mimimum;
}
set
{
if (this.Mimimum == value)
return;
//更改單元格模板的值
((DataGridViewProgressBarCell)this.CellTemplate).Mimimum =
value;
//改變已添加到DataGridView的單元格的值
if (this.DataGridView == null)
return;
int rowCount = this.DataGridView.RowCount;
for (int i = 0; i < rowCount; i++)
{
DataGridViewRow r = this.DataGridView.Rows.SharedRow(i);
((DataGridViewProgressBarCell)r.Cells[this.Index]).Mimimum =
value;
}
}
}
}
/// <summary>
///在DataGridView中顯示一個示例
/// </summary>
public class DataGridViewProgressBarCell : DataGridViewTextBoxCell
{
//轉換器
public DataGridViewProgressBarCell()
{
this.maximumValue = 100;
this.mimimumValue = 0;
}
private int maximumValue;
public int Maximum
{
get
{
return this.maximumValue;
}
set
{
this.maximumValue = value;
}
}
private int mimimumValue;
public int Mimimum
{
get
{
return this.mimimumValue;
}
set
{
this.mimimumValue = value;
}
}
//指定單元格值的數據類型
//這里是整數型
public override Type ValueType
{
get
{
return typeof(int);
}
}
//指定新記錄行的單元格的既定值
public override object DefaultNewRowValue
{
get
{
return 0;
}
}
//因為添加了新屬性，所以
// 需要超過Clo方法
public override object Clone()
{
DataGridViewProgressBarCell cell =
(DataGridViewProgressBarCell)base.Clone();
cell.Maximum = this.Maximum;
cell.Mimimum = this.Mimimum;
return cell;
}
protected override void Paint(Graphics graphics,
Rectangle clipBounds, Rectangle cellBounds,
int rowIndex, DataGridViewElementStates cellState,
object value, object formattedValue, string errorText,
DataGridViewCellStyle cellStyle,
DataGridViewAdvancedBorderStyle advancedBorderStyle,
DataGridViewPaintParts paintParts)
{
//決定值
int intValue = 0;
if (value is int)
intValue = (int)value;
if (intValue < this.mimimumValue)
intValue = this.mimimumValue;
if (intValue > this.maximumValue)
intValue = this.maximumValue;
//計算百分比
double rate = (double)(intValue - this.mimimumValue) /
(this.maximumValue - this.mimimumValue);
//繪制單元格的邊界線
if ((paintParts & DataGridViewPaintParts.Border) ==
DataGridViewPaintParts.Border)
{
this.PaintBorder(graphics, clipBounds, cellBounds,
cellStyle, advancedBorderStyle);
}
//在邊界線內側取得范圍
Rectangle borderRect = this.BorderWidths(advancedBorderStyle);
Rectangle paintRect = new Rectangle(
cellBounds.Left + borderRect.Left,
cellBounds.Top + borderRect.Top,
cellBounds.Width - borderRect.Right,
cellBounds.Height - borderRect.Bottom);
//決定背景顏色
//在未選擇時更改顏色
bool isSelected =
(cellState & DataGridViewElementStates.Selected) ==
DataGridViewElementStates.Selected;
Color bkColor;
if (isSelected &&
(paintParts & DataGridViewPaintParts.SelectionBackground) ==
DataGridViewPaintParts.SelectionBackground)
{
bkColor = cellStyle.SelectionBackColor;
}
else
{
bkColor = cellStyle.BackColor;
}
//繪制背景
if ((paintParts & DataGridViewPaintParts.Background) ==
DataGridViewPaintParts.Background)
{
using (SolidBrush backBrush = new SolidBrush(bkColor))
{
graphics.FillRectangle(backBrush, paintRect);
}
}
//扣除Padding
paintRect.Offset(cellStyle.Padding.Right, cellStyle.Padding.Top);
paintRect.Width -= cellStyle.Padding.Horizontal;
paintRect.Height -= cellStyle.Padding.Vertical;
//繪制程序
if ((paintParts & DataGridViewPaintParts.ContentForeground) ==
DataGridViewPaintParts.ContentForeground)
{
if (ProgressBarRenderer.IsSupported)
{
//用visual風格繪制
//繪制序號
ProgressBarRenderer.DrawHorizontalBar(graphics, paintRect);
//在顯示欄上繪制欄
Rectangle barBounds = new Rectangle(
paintRect.Left + 3, paintRect.Top + 3,
paintRect.Width - 4, paintRect.Height - 6);
barBounds.Width = (int)Math.Round(barBounds.Width * rate);
ProgressBarRenderer.DrawHorizontalChunks(graphics, barBounds);
}
else
{
//無法在視覺樣式中繪制時
graphics.FillRectangle(Brushes.White, paintRect);
graphics.DrawRectangle(Pens.Black, paintRect);
Rectangle barBounds = new Rectangle(
paintRect.Left + 1, paintRect.Top + 1,
paintRect.Width - 1, paintRect.Height - 1);
barBounds.Width = (int)Math.Round(barBounds.Width * rate);
graphics.FillRectangle(Brushes.Blue, barBounds);
}
}
//顯示焦點的框架
if (this.DataGridView.CurrentCellAddress.X == this.ColumnIndex &&
this.DataGridView.CurrentCellAddress.Y == this.RowIndex &&
(paintParts & DataGridViewPaintParts.Focus) ==
DataGridViewPaintParts.Focus &&
this.DataGridView.Focused)
{
//適當決定聚焦框的大小
Rectangle focusRect = paintRect;
focusRect.Inflate(-3, -3);
ControlPaint.DrawFocusRectangle(graphics, focusRect);
//指定背景色並繪制焦點框時
//ControlPaint.DrawFocusRectangle(
// graphics, focusRect, Color.Empty, bkColor);
}
//顯示文本
if ((paintParts & DataGridViewPaintParts.ContentForeground) ==
DataGridViewPaintParts.ContentForeground)
{
//確定要顯示的文本
string txt = string.Format("{0}%", Math.Round(rate * 100));
//string txt = formattedValue.ToString();
//原本，應該根據cellStyle決定TextFormatFlags。
TextFormatFlags flags = TextFormatFlags.HorizontalCenter |
TextFormatFlags.VerticalCenter;
//確定顏色
Color fColor = cellStyle.ForeColor;
//if (isSelected)
// fColor = cellStyle.SelectionForeColor;
//else
// fColor = cellStyle.ForeColor;
//繪制文本
paintRect.Inflate(-2, -2);
TextRenderer.DrawText(graphics, txt, cellStyle.Font,
paintRect, fColor, flags);
}
//顯示錯誤圖標
if ((paintParts & DataGridViewPaintParts.ErrorIcon) ==
DataGridViewPaintParts.ErrorIcon &&
this.DataGridView.ShowCellErrors &&
!string.IsNullOrEmpty(errorText))
{
//取得顯示錯誤圖標的區域
Rectangle iconBounds = this.GetErrorIconBounds(
graphics, cellStyle, rowIndex);
iconBounds.Offset(cellBounds.X, cellBounds.Y);
//繪制錯誤圖標
this.PaintErrorIcon(graphics, iconBounds, cellBounds, errorText);
}
}
}
用法如下
[C#]
//制作Data GridViewensBarColumn
DataGridViewProgressBarColumn pbColumn =
new DataGridViewProgressBarColumn();
//綁定數據源中的列1
pbColumn.DataPropertyName = "Column1";
//添加列
DataGridView1.Columns.Add(pbColumn);
58. 中添加MaskedTextBox
[C#]
using System;
using System.Windows.Forms;
/// <summary>
/// 表示Data GridViewMaskelxCel對象的列。
/// </summary>
public class DataGridViewMaskedTextBoxColumn :
DataGridViewColumn
{
//指定作為CareTempato的Data GridViewMaskadkelxCel對象
//調用基本類的轉換器
public DataGridViewMaskedTextBoxColumn()
: base(new DataGridViewMaskedTextBoxCell())
{
}
private string maskValue = "";
/// <summary>
/// 適用於MaskadTetBx的Mask屬性的值
/// </summary>
public string Mask
{
get
{
return this.maskValue;
}
set
{
this.maskValue = value;
}
}
//因為添加了新屬性，所以
// 需要超過Clo方法
public override object Clone()
{
DataGridViewMaskedTextBoxColumn col =
(DataGridViewMaskedTextBoxColumn)base.Clone();
col.Mask = this.Mask;
return col;
}
//檢索和設置CellTemplate。
public override DataGridViewCell CellTemplate
{
get
{
return base.CellTemplate;
}
set
{
//只能說一句話
// 阻止為CellTemplate設置
if (!(value is DataGridViewMaskedTextBoxCell))
{
throw new InvalidCastException(
"Dat a GridViewMaskadtemtvxCel對象" +
"請指定");
}
base.CellTemplate = value;
}
}
}
/// <summary>
///可以在MaskadTectBx中編輯的文本信息
/// 顯示在DataGridView控件中。
/// </summary>
public class DataGridViewMaskedTextBoxCell :
DataGridViewTextBoxCell
{
//コンストラクタ
public DataGridViewMaskedTextBoxCell()
{
}
//初始化編輯控件
//編輯控制需要在另一個單元格和列中使用，因此需要初始化
public override void InitializeEditingControl(
int rowIndex, object initialFormattedValue,
DataGridViewCellStyle dataGridViewCellStyle)
{
base.InitializeEditingControl(rowIndex,
initialFormattedValue, dataGridViewCellStyle);
//獲取編輯控制
DataGridViewMaskedTextBoxEditingControl maskedBox =
this.DataGridView.EditingControl as
DataGridViewMaskedTextBoxEditingControl;
if (maskedBox != null)
{
//設置Tect
maskedBox.Text =
this.Value != null ? this.Value.ToString() : "";
//反映自定義列屬性
DataGridViewMaskedTextBoxColumn column =
this.OwningColumn as DataGridViewMaskedTextBoxColumn;
if (column != null)
{
maskedBox.Mask = column.Mask;
}
}
}
//指定編輯控制的類型
public override Type EditType
{
get
{
return typeof(DataGridViewMaskedTextBoxEditingControl);
}
}
//指定單元格值的數據類型
//在這里，作為Object
//和基本班一樣，沒有必要超重
public override Type ValueType
{
get
{
return typeof(object);
}
}
//指定新記錄行的單元格的既定值
public override object DefaultNewRowValue
{
get
{
return base.DefaultNewRowValue;
}
}
}
/// <summary>
/// 用Data GridViewMaskadTectvxCel來擔任主機
/// 表示MaskedTextBox控件。
/// </summary>
public class DataGridViewMaskedTextBoxEditingControl :
MaskedTextBox, IDataGridViewEditingControl
{
//顯示了編輯控制的DataGridView
DataGridView dataGridView;
//顯示編輯控制的行
int rowIndex;
//編輯控制的值和單元格的值是否不同
bool valueChanged;
//轉換器
public DataGridViewMaskedTextBoxEditingControl()
{
this.TabStop = false;
}
#region IDataGridViewEditingControl 成員
//由編輯控制改變的單元格的值
public object GetEditingControlFormattedValue(
DataGridViewDataErrorContexts context)
{
return this.Text;
}
//由編輯控制改變的單元格的值
public object EditingControlFormattedValue
{
get
{
return this.GetEditingControlFormattedValue(
DataGridViewDataErrorContexts.Formatting);
}
set
{
this.Text = (string)value;
}
}
//將單元格樣式應用於編輯控制
//將編輯控制的前景色，背景顏色，字體等組合成單元格樣式
public void ApplyCellStyleToEditingControl(
DataGridViewCellStyle dataGridViewCellStyle)
{
this.Font = dataGridViewCellStyle.Font;
this.ForeColor = dataGridViewCellStyle.ForeColor;
this.BackColor = dataGridViewCellStyle.BackColor;
switch (dataGridViewCellStyle.Alignment)
{
case DataGridViewContentAlignment.BottomCenter:
case DataGridViewContentAlignment.MiddleCenter:
case DataGridViewContentAlignment.TopCenter:
this.TextAlign = HorizontalAlignment.Center;
break;
case DataGridViewContentAlignment.BottomRight:
case DataGridViewContentAlignment.MiddleRight:
case DataGridViewContentAlignment.TopRight:
this.TextAlign = HorizontalAlignment.Right;
break;
default:
this.TextAlign = HorizontalAlignment.Left;
break;
}
}
//有編輯單元格的DataGridView
public DataGridView EditingControlDataGridView
{
get
{
return this.dataGridView;
}
set
{
this.dataGridView = value;
}
}
//正在編輯的行的索引
public int EditingControlRowIndex
{
get
{
return this.rowIndex;
}
set
{
this.rowIndex = value;
}
}
//值是否改變
//編輯控制的值和單元格的值是否不同
public bool EditingControlValueChanged
{
get
{
return this.valueChanged;
}
set
{
this.valueChanged = value;
}
}
//指定的鍵由DataGridView處理，還是編輯控制？
//重回跟蹤，編輯控制處理
//dataGridViewWantsInputKey為True時，DataGridView可以處理
public bool EditingControlWantsInputKey(
Keys keyData, bool dataGridViewWantsInputKey)
{
//Keys.REF.Right，Right，Home，End的時候，還將返回
//如果不這樣做，用這些鍵把焦點轉移到另一個單元格里
switch (keyData & Keys.KeyCode)
{
case Keys.Right:
case Keys.End:
case Keys.Left:
case Keys.Home:
return true;
default:
return false;
}
}
//鼠標光標指定在Editing Panel上時的光標
//EditingPanel是用於托管編輯控件的面板。
//編輯控件小於單元時，控件以外的部分變為面板
public Cursor EditingPanelCursor
{
get
{
return base.Cursor;
}
}
//以控制方式進行編輯
//將文本作為選擇狀態，或將插入指針作為結尾
public void PrepareEditingControlForEdit(bool selectAll)
{
if (selectAll)
{
//處於選擇狀態
this.SelectAll();
}
else
{
//把插入指針放在末尾
this.SelectionStart = this.TextLength;
}
}
//值更改時是否更改單元格的位置
//當值改變時，編輯控制的大小被改變時
public bool RepositionEditingControlOnValueChange
{
get
{
return false;
}
}
#endregion
//值已更改
protected override void OnTextChanged(EventArgs e)
{
base.OnTextChanged(e);
//通知DataGridView值已更改
this.valueChanged = true;
this.dataGridView.NotifyCurrentCellDirty(true);
}
}
用法如下
[C#]
//制作Dat at ag idViewMaskadTectvxColumn
DataGridViewMaskedTextBoxColumn maskedColumn =
new DataGridViewMaskedTextBoxColumn();
//顯示數據源的“Column1”
maskedColumn.DataPropertyName = "Column1";
//設定MaskadTetBx的Mask屬性的值
maskedColumn.Mask = "000";
//在DataGridView中添加列
DataGridView1.Columns.Add(maskedColumn);
59. 中Enter鍵按下焦點移至旁邊的單元格
[C#]
using System;
using System.Windows.Forms;
/// <summary>
///在按鈕被按下時，與Tab鍵按下的相同動作
/// （將現在的單元格移動到旁邊的單元格）DataGridView
/// </summary>
public class DataGridViewEx : DataGridView
{
protected override bool ProcessDialogKey(Keys keyData)
{
//當按下EEB鍵時，Tab鍵被推了
if ((keyData & Keys.KeyCode) == Keys.Enter)
{
return this.ProcessTabKey(keyData);
}
return base.ProcessDialogKey(keyData);
}
protected override bool ProcessDataGridViewKey(KeyEventArgs e)
{
//當按下EEB鍵時，Tab鍵被推了
if (e.KeyCode == Keys.Enter)
{
return this.ProcessTabKey(e.KeyCode);
}
return base.ProcessDataGridViewKey(e);
}
}
60. 行集合化（Group）
[C#]
//默認單元格樣式
private DataGridViewCellStyle defaultCellStyle;
//分組的頂部行的單元格樣式
private DataGridViewCellStyle groupCellStyle;
//格式的短劇
private void Form1_Load(object sender, EventArgs e)
{
//設置單元格樣式
this.defaultCellStyle = new DataGridViewCellStyle();
this.groupCellStyle = new DataGridViewCellStyle();
this.groupCellStyle.ForeColor = Color.White;
this.groupCellStyle.BackColor = Color.DarkGreen;
this.groupCellStyle.SelectionBackColor = Color.DarkBlue;
}
//Carelmatting事件韓劇
private void DataGridView1_CellFormatting(object sender,
DataGridViewCellFormattingEventArgs e)
{
DataGridView dgv = (DataGridView)sender;
//單元格是第一列，不是頁眉，也不是新的行時
if (e.ColumnIndex == 0 && e.RowIndex >= 0 &&
e.RowIndex != dgv.NewRowIndex)
{
if (e.RowIndex == 0 ||
!dgv[e.ColumnIndex, e.RowIndex - 1].Value.Equals(e.Value))
{
//第一行或與上單元格不同的值時，改變背景顏色
dgv.Rows[e.RowIndex].DefaultCellStyle = this.groupCellStyle;
}
else
{
dgv.Rows[e.RowIndex].DefaultCellStyle = this.defaultCellStyle;
e.Value = "";
e.FormattingApplied = true;
}
}
}