Devexpress GridControl切換數據源

gridControl1.DataSource = dt1;

(gridControl1.DefaultView as GridView).Columns.Clear();//切換前需要先把列清空了。

gridControl1.DataSource = dt2;

(gridControl1.DefaultView as GridView).PopulateColumns();

紅色部分取一種寫法即可。

 

三、選中的行、值

int selectRow = gridView1.GetSelectedRows()[0];

//1 需要知道列名

string id = this.gridView1.GetRowCellValue(selectRow, "id").ToString();

//2 獲取焦點值

object selectValue = gridView1.GetFocusedValue();

 

四、顯示搜索框

gridView1.OptionsFind.AlwaysVisible = true;

 

五、選中某一行

GridView.FocusedRowHandle =i;
GridView.SelectRow(i);

 

 

六：遍歷GridView

 

for (int i = 0; i < gridView1.RowCount; i++)
{
       for (int j = 0; j < gridView1.Columns.Count; j++)
       {
             object val = gridView1.GetRowCellValue(i, gridView1.Columns[j]);
       }
}

 

 

七：單元格雙擊響應

 

需要先將gridview1.OptionsBehavior.Editable設為false,然后響應gridControl1_DoubleClick事件。

 

        private void gridControl1_DoubleClick(object sender, EventArgs e)
        {
            MouseEventArgs arg = e as MouseEventArgs;
            if (arg == null)
                return;

 

            GridHitInfo hitInfo = gridView1.CalcHitInfo(new Point(arg.X, arg.Y));//獲取坐標點
            if (hitInfo.RowHandle >= 0)
            {
                DataRow row = gridView1.GetDataRow(hitInfo.RowHandle);
                _list.Clear();
                _list.Add(row[0].ToString());
                gisResoureMonControl1.SetSelectResource(_list);
            }           
        }

 

 

八、DevExpress gridcontrol如何分組顯示

（1）、手動方式

1、添加分組項，Run Designer--Group Summary Items--Add，設置計算添加SummaryType：Count總計

 

2、設置顯示格式

  2.1 格式：{0}，效果：顯示分組的列標題，如：Order ID

 2.2 格式：{1}，效果：顯示分組后的項，如：10248

3、效果如下：

（2）、代碼

 

            gridView1.GroupSummary.Add(DevExpress.Data.SummaryItemType.Count, "分組1");  //添加分組1，如果不是count，則名稱必須與字段名對應
            gridView1.GroupFormat = "{1} {2}";  //默認"{0}: [#image]{1} {2}"; 字段名稱：數據 計數=？

            gridView1.Columns["部門名稱"].GroupIndex = 0;  //設置默認分組列


            //分組列格式
            gridView1.GroupSummary.Add(DevExpress.Data.SummaryItemType.Average, "id", gridView1.Columns["id"]);
            gridView1.GroupSummary[1].DisplayFormat = "AVG={0:c}";


            gridView1.GroupSummary.Add(DevExpress.Data.SummaryItemType.Count, "姓名", gridView1.Columns["姓名"]);
            ((DevExpress.XtraGrid.GridSummaryItem)gridView1.GroupSummary[gridView1.GroupSummary.Count - 1]).DisplayFormat = "小計：{0:N0}";


            gridView1.ExpandAllGroups();

效果如下：

 

九 、C# devExpress GridControl 行中行 子行 多級行

 

 　　　　　　 DB db = new DB();
            DataSet ds = new System.Data.DataSet();
            SqlCommand comm2 = new SqlCommand(sql, db.getSqlConnection());  //db.getSqlConnection() 返回一個sqlConnection 對象
            SqlCommand comm3 = new SqlCommand(sql1, db.getSqlConnection());
            SqlCommand comm4 = new SqlCommand(sql2, db.getSqlConnection());
            SqlDataAdapter da2 = new SqlDataAdapter(comm2);
            SqlDataAdapter da3 = new SqlDataAdapter(comm3);
            SqlDataAdapter da4 = new SqlDataAdapter(comm3);
 
            da2.Fill(ds,"emp");
            da3.Fill(ds,"job");
            da4.Fill(ds,"re");
 
            this.treeListLookUpEdit1TreeList.DataSource = ds;
 
            DataColumn parentColumn = ds.Tables["emp"].Columns["empNum"];
            DataColumn childColumn = ds.Tables["job"].Columns["empNum"];
            DataColumn secondChild = ds.Tables["re"].Columns["empNum"];
 
            DataRelation relCustOrder;
            relCustOrder = new DataRelation("對應工作", parentColumn, childColumn);
            DataRelation job;
            job = new DataRelation("部門調整", childColumn, secondChild);
            ds.Relations.Add(relCustOrder);
            ds.Relations.Add(job);
            this.gridControl1.DataSource = ds.Tables["emp"];

 

 

 十、隱藏從表列 （只能隱藏一級子表）

//隱藏子表（即從表）的列，獲取主表的行展開事件

private void gridView3_MasterRowExpanded(object sender, DevExpress.XtraGrid.Views.Grid.CustomMasterRowEventArgs e)
{

    //獲取所點擊行的從表對象　　　　
    DevExpress.XtraGrid.Views.Grid.GridView childView= gridView3.GetDetailView(e.RowHandle, e.RelationIndex) as DevExpress.XtraGrid.Views.Grid.GridView;
    if (childView != null)
    {
        childView.Columns["MainId"].Visible = false;　　//隱藏子表列

    }
}

 

十一、展開第一級子表

 for (int i = 0; i < gridView1.RowCount - 1; i++)
 {
       gridView1.SetMasterRowExpandedEx(i, -1, true);
 }

十二、展開所有子表 及隱藏子表的列

 int m_RelationIndex = 0;
 private void ExpandAllRows()
        {
            for (int masteViewRowIndex = 0; masteViewRowIndex < ds.Tables["Table1"].Rows.Count; masteViewRowIndex++)
            {
                MainGridView.ExpandMasterRow(masteViewRowIndex, 0);
                ExpandChildRows(MainGridView, masteViewRowIndex);
            }
        }
 
        private void ExpandChildRows(GridView gv, int rowIndex)
        {
            GridView currentChildGV = gv.GetDetailView(rowIndex, m_RelationIndex) as GridView;
            if (currentChildGV != null)
            {
                for (int childGVRowIndex = 0; childGVRowIndex < currentChildGV.DataRowCount; childGVRowIndex++)
                {
                    ExpandChildRows(currentChildGV, childGVRowIndex);
　　　　　　　　　　　 //more 可以在此處隱藏子表的列
                }
            }
            else if (currentChildGV == null && gv.CanExpandMasterRowEx(rowIndex, m_RelationIndex))
            {
                gv.SetMasterRowExpandedEx(rowIndex, m_RelationIndex, true);
                ExpandChildRows(gv, rowIndex);
 //more 可以在此處隱藏子表的列
            }
            else if (currentChildGV == null && !gv.CanExpandMasterRowEx(rowIndex, m_RelationIndex))
            {
                return;
            }
        }

 

十三、GridControl切換數據源異常，提示 “無法將類型為“NameSpace.ClassName”的對象強制轉換為類型“System.Data.DataRowView”。”

解決方法，在DataSource賦值前后加上BeginUpdate和EndUpdate

mainGridControl1.BeginUpdate();
mainGridControl1.DataSource = listProduct;
mainGridControl1.EndUpdate();

 

參考

1 DEV控件GridControl常用屬性設置

2 DevExpress gridcontrol如何分組顯示

3 DevExpress gridcontrol gridView主從表折疊/展開顯示

4 DevExpressControl中的GridControl展現主從表數據結構