Winform系列——好看的DataGridView折叠控件

      来园子几年了，第一次写博客。以前看到别人的博客就在想：这些人怎么能有这么多时间整理这么多知识，难道他们不用工作、不用写代码、不用交付测试？随着工作阅历的增加，发现其实并不是时间的问题，关键一个字：懒。其实写博客的好处大家伙都心知肚明。呵呵，第一次写就这么多废话，看样子真是年纪大了。

　　其实自己之前的5年也一直是做BS的系统，现在刚换的一家公司需要做一个CS的产品。屌了，自己之前一点经验都没有呢，没办法，既来之则安之，学呗。于是乎各种百度、各种视频，各种资料。系统其中一个需求就是需要表格折叠显示，这如果在BS里面那太简单了，JqGrid默认都自带，可是DataGridview不支持折叠啊，咋办。自己封装呗，于是乎又是各种百度，这种源码学习。最后借鉴源码封了这么一个东西，发出来分享下，也能让自己加深印象。首先不多说，上图：

 

 

大概的效果就是这样。上代码。

1、首先重写DataGridview，代码如下：

public class MasterControl : DataGridView
    {
        #region 字段
        private List<int> rowCurrent = new List<int>();
        internal static int rowDefaultHeight = 22;
        internal static int rowExpandedHeight = 300;
        internal static int rowDefaultDivider = 0;
        internal static int rowExpandedDivider = 300 - 22;
        internal static int rowDividerMargin = 5;
        internal static bool collapseRow;
　　　　 //detailControl变量作为一个容器用来保存子表格
        public detailControl childView = new detailControl() { Visible = false }; // VBConversions Note: Initial value cannot be assigned here since it is non-static.  Assignment has been moved to the class constructors.
        //
        internal System.Windows.Forms.ImageList RowHeaderIconList;
        private System.ComponentModel.Container components = null;
        //
        DataSet _cDataset;
        string _foreignKey;
        string _primaryKey;
        string _filterFormat;
        private controlType EControlType;
        public int ExpandRowIndex = 0;
        

        #endregion

        #region 构造函数
        /// <summary>
        /// 通过传递过来的枚举判断是两级还是三级展开，表的对应关系通过Relations来读取
        /// 所以调用此构造函数的时候必须要讲Relations设置正确，才能正确显示层级关系。
        ///  oDataSet.Relations.Add("1", oDataSet.Tables["T1"].Columns["Menu_ID"], oDataSet.Tables["T2"].Columns["Menu_ID"]);
        ///  oDataSet.Relations.Add("2", oDataSet.Tables["T2"].Columns["Menu_Name2"], oDataSet.Tables["T3"].Columns["Menu_Name2"]);
        ///  这两次Add的顺序不能颠倒，必须先添加一、二级的表关联，再添加二、三级的表关联
        /// </summary>
        /// <param name="cDataset">数据源DataSet，里面还有各个表的对应关系</param>
        /// <param name="eControlType">枚举类型</param>
        public MasterControl(DataSet cDataset, controlType eControlType)
        {
            SetMasterControl(cDataset, eControlType);   
        }

        /// <summary>
        /// 第二种使用方法
        /// </summary>
        /// <param name="lstData1">折叠控件第一层的集合</param>
        /// <param name="lstData2">折叠控件第二层的集合</param>
        /// <param name="lstData3">折叠控件第三层的集合</param>
        /// <param name="dicRelateKey1">第一二层之间对应主外键</param>
        /// <param name="dicRelateKey2">第二三层之间对应主外键</param>
        /// <param name="eControlType">枚举类型</param>
        public MasterControl(object lstData1, object lstData2, 
                             object lstData3, Dictionary<string, string> dicRelateKey1, 
                             Dictionary<string ,string>dicRelateKey2, controlType eControlType)
        {
            var oDataSet = new DataSet();
            try
            {
                var oTable1 = new DataTable();
                oTable1 = Fill(lstData1);
                oTable1.TableName = "T1";

                var oTable2 = Fill(lstData2);
                oTable2.TableName = "T2";

                if (lstData3 == null || dicRelateKey2 == null || dicRelateKey2.Keys.Count <= 0)
                {
                    oDataSet.Tables.AddRange(new DataTable[] { oTable1, oTable2 });
                    oDataSet.Relations.Add("1", oDataSet.Tables["T1"].Columns[dicRelateKey1.Keys.FirstOrDefault()], oDataSet.Tables["T2"].Columns[dicRelateKey1.Values.FirstOrDefault()]);
                }
                else
                {
                    var oTable3 = Fill(lstData3);
                    oTable3.TableName = "T3";

                    oDataSet.Tables.AddRange(new DataTable[] { oTable1, oTable2, oTable3 });
                    //这是对应关系的时候主键必须唯一
                    oDataSet.Relations.Add("1", oDataSet.Tables["T1"].Columns[dicRelateKey1.Keys.FirstOrDefault()], oDataSet.Tables["T2"].Columns[dicRelateKey1.Values.FirstOrDefault()]);
                    oDataSet.Relations.Add("2", oDataSet.Tables["T2"].Columns[dicRelateKey2.Keys.FirstOrDefault()], oDataSet.Tables["T3"].Columns[dicRelateKey2.Values.FirstOrDefault()]);
                }
            }
            catch
            {
                oDataSet = new DataSet();
            }
            SetMasterControl(oDataSet, eControlType);
        }

        /// <summary>
        /// 控件初始化
        /// </summary>
        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
            base.RowHeaderMouseClick += new System.Windows.Forms.DataGridViewCellMouseEventHandler(MasterControl_RowHeaderMouseClick);
            base.RowPostPaint += new System.Windows.Forms.DataGridViewRowPostPaintEventHandler(MasterControl_RowPostPaint);
            base.Scroll += new System.Windows.Forms.ScrollEventHandler(MasterControl_Scroll);
            base.SelectionChanged += new System.EventHandler(MasterControl_SelectionChanged);
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(MasterControl));
            this.RowHeaderIconList = new System.Windows.Forms.ImageList(this.components);
            ((System.ComponentModel.ISupportInitialize)this).BeginInit();
            this.SuspendLayout();
            //
            //RowHeaderIconList
            //
            this.RowHeaderIconList.ImageStream = (System.Windows.Forms.ImageListStreamer)(resources.GetObject("RowHeaderIconList.ImageStream"));
            this.RowHeaderIconList.TransparentColor = System.Drawing.Color.Transparent;
            this.RowHeaderIconList.Images.SetKeyName(0, "expand.png");
            this.RowHeaderIconList.Images.SetKeyName(1, "collapse.png");
            //
            //MasterControl
            //
            ((System.ComponentModel.ISupportInitialize)this).EndInit();
            this.ResumeLayout(false);

        }
        #endregion

        #region 数据绑定
        /// <summary>
        /// 设置表之间的主外键关联
        /// </summary>
        /// <param name="tableName">DataTable的表名称</param>
        /// <param name="foreignKey">外键</param>
        public void setParentSource(string tableName, string primarykey, string foreignKey)
        {
            this.DataSource = new DataView(_cDataset.Tables[tableName]);
            cModule.setGridRowHeader(this);
            _foreignKey = foreignKey;
            _primaryKey = primarykey;
            if (_cDataset.Tables[tableName].Columns[primarykey].GetType().ToString() == typeof(int).ToString()
                || _cDataset.Tables[tableName].Columns[primarykey].GetType().ToString() == typeof(double).ToString()
                || _cDataset.Tables[tableName].Columns[primarykey].GetType().ToString() == typeof(decimal).ToString())
            {
                _filterFormat = foreignKey + "={0}";
            }
            else
            {
                _filterFormat = foreignKey + "=\'{0}\'";
            }
        }
        #endregion

        #region 事件
        //控件的行头点击事件
        private void MasterControl_RowHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            try
            {
                Rectangle rect = new Rectangle(System.Convert.ToInt32((double)(rowDefaultHeight - 16) / 2), System.Convert.ToInt32((double)(rowDefaultHeight - 16) / 2), 16, 16);
                if (rect.Contains(e.Location))
                {
                    //缩起
                    if (rowCurrent.Contains(e.RowIndex))
                    {
                        rowCurrent.Clear();
                        this.Rows[e.RowIndex].Height = rowDefaultHeight;
                        this.Rows[e.RowIndex].DividerHeight = rowDefaultDivider;

                        this.ClearSelection();
                        collapseRow = true;
                        this.Rows[e.RowIndex].Selected = true;
                        if (EControlType == controlType.middle)
                        {
                            var oParent = ((MasterControl)this.Parent.Parent);
                            oParent.Rows[oParent.ExpandRowIndex].Height = rowDefaultHeight * (this.Rows.Count + 4);
                            oParent.Rows[oParent.ExpandRowIndex].DividerHeight = rowDefaultHeight * (this.Rows.Count + 3);
                            if (oParent.Rows[oParent.ExpandRowIndex].Height > 500)
                            {
                                oParent.Rows[oParent.ExpandRowIndex].Height = 500;
                                oParent.Rows[oParent.ExpandRowIndex].Height = 480;
                            }
                        }
                    }
                    //展开
                    else
                    {
                        if (!(rowCurrent.Count == 0))
                        {
                            var eRow = rowCurrent[0];
                            rowCurrent.Clear();
                            this.Rows[eRow].Height = rowDefaultHeight;
                            this.Rows[eRow].DividerHeight = rowDefaultDivider;
                            this.ClearSelection();
                            collapseRow = true;
                            this.Rows[eRow].Selected = true;
                        }
                        rowCurrent.Add(e.RowIndex);
                        this.ClearSelection();
                        collapseRow = true;
                        this.Rows[e.RowIndex].Selected = true;
                        this.ExpandRowIndex = e.RowIndex;
                        
                        this.Rows[e.RowIndex].Height = 66 + rowDefaultHeight * (((DataView)(childView.childGrid[0].DataSource)).Count + 1);
                        this.Rows[e.RowIndex].DividerHeight = 66 + rowDefaultHeight * (((DataView)(childView.childGrid[0].DataSource)).Count);
                        //设置一个最大高度
                        if (this.Rows[e.RowIndex].Height > 500)
                        {
                            this.Rows[e.RowIndex].Height = 500;
                            this.Rows[e.RowIndex].DividerHeight = 480;
                        }
                        if (EControlType == controlType.middle)
                        {
                            if (this.Parent.Parent.GetType() != typeof(MasterControl))
                                return;
                            var oParent = ((MasterControl)this.Parent.Parent);
                            oParent.Rows[oParent.ExpandRowIndex].Height = this.Rows[e.RowIndex].Height + rowDefaultHeight * (this.Rows.Count + 3);
                            oParent.Rows[oParent.ExpandRowIndex].DividerHeight = this.Rows[e.RowIndex].DividerHeight + rowDefaultHeight * (this.Rows.Count + 3);
                            if (oParent.Rows[oParent.ExpandRowIndex].Height > 500)
                            {
                                oParent.Rows[oParent.ExpandRowIndex].Height = 500;
                                oParent.Rows[oParent.ExpandRowIndex].Height = 480;
                            }
                        }
                        //if (EControlType == controlType.outside)
                        //{
                        //    //SetControl(this);
                        //}
                        //this.Rows[e.RowIndex].Height = rowExpandedHeight;
                        //this.Rows[e.RowIndex].DividerHeight = rowExpandedDivider;
                    }
                    //this.ClearSelection();
                    //collapseRow = true;
                    //this.Rows[e.RowIndex].Selected = true;
                }
                else
                {
                    collapseRow = false;
                }
            }
            catch (Exception ex)
            {

            }
        }

        //控件的行重绘事件
        private void MasterControl_RowPostPaint(object obj_sender, DataGridViewRowPostPaintEventArgs e)
        {
            try
            {
                var sender = (DataGridView)obj_sender;
                //set childview control
                var rect = new Rectangle((int)(e.RowBounds.X + ((double)(rowDefaultHeight - 16) / 2)), (int)(e.RowBounds.Y + ((double)(rowDefaultHeight - 16) / 2)), 16, 16);
                if (collapseRow)
                {
                    if (this.rowCurrent.Contains(e.RowIndex))
                    {
                        #region 更改点开后背景色 刘金龙
                        var rect1 = new Rectangle(e.RowBounds.X, e.RowBounds.Y + rowDefaultHeight, e.RowBounds.Width, e.RowBounds.Height - rowDefaultHeight);
                        using (Brush b = new SolidBrush(Color.FromArgb(164, 169, 143)))
                        {
                            e.Graphics.FillRectangle(b, rect1);
                        } 
                        #endregion
                        sender.Rows[e.RowIndex].DividerHeight = sender.Rows[e.RowIndex].Height - rowDefaultHeight;
                        e.Graphics.DrawImage(RowHeaderIconList.Images[(int)rowHeaderIcons.collapse], rect);
                        childView.Location = new Point(e.RowBounds.Left + sender.RowHeadersWidth, e.RowBounds.Top + rowDefaultHeight + 5);
                        childView.Width = e.RowBounds.Right - sender.RowHeadersWidth;
                        childView.Height = System.Convert.ToInt32(sender.Rows[e.RowIndex].DividerHeight - 10);
                        childView.Visible = true;
                    }
                    else
                    {
                        childView.Visible = false;
                        e.Graphics.DrawImage(RowHeaderIconList.Images[(int)rowHeaderIcons.expand], rect);
                    }
                    collapseRow = false;
                }
                else
                {
                    if (this.rowCurrent.Contains(e.RowIndex))
                    {
                        #region 更改点开后背景色 刘金龙
                        var rect1 = new Rectangle(e.RowBounds.X, e.RowBounds.Y + rowDefaultHeight, e.RowBounds.Width, e.RowBounds.Height - rowDefaultHeight);
                        using (Brush b = new SolidBrush(Color.FromArgb(164,169,143)))
                        {
                            e.Graphics.FillRectangle(b, rect1);
                        } 
                        #endregion
                        sender.Rows[e.RowIndex].DividerHeight = sender.Rows[e.RowIndex].Height - rowDefaultHeight;
                        e.Graphics.DrawImage(RowHeaderIconList.Images[(int)rowHeaderIcons.collapse], rect);
                        childView.Location = new Point(e.RowBounds.Left + sender.RowHeadersWidth, e.RowBounds.Top + rowDefaultHeight + 5);
                        childView.Width = e.RowBounds.Right - sender.RowHeadersWidth;
                        childView.Height = System.Convert.ToInt32(sender.Rows[e.RowIndex].DividerHeight - 10);
                        childView.Visible = true;
                    }
                    else
                    {
                        childView.Visible = false;
                        e.Graphics.DrawImage(RowHeaderIconList.Images[(int)rowHeaderIcons.expand], rect);
                    }
                }
                cModule.rowPostPaint_HeaderCount(sender, e);
            }
            catch
            {

            }
        }

        //控件的滚动条滚动事件
        private void MasterControl_Scroll(object sender, ScrollEventArgs e)
        {
            try
            {
                if (!(rowCurrent.Count == 0))
                {
                    collapseRow = true;
                    this.ClearSelection();
                    this.Rows[rowCurrent[0]].Selected = true;
                }
            }
            catch
            {

            }
        }

        //控件的单元格选择事件
        private void MasterControl_SelectionChanged(object sender, EventArgs e)
        {
            try
            {
                if (!(this.RowCount == 0))
                {
                    if (rowCurrent.Contains(this.CurrentRow.Index))
                    {
                        foreach (DataGridView cGrid in childView.childGrid)
                        {
                            ((DataView)cGrid.DataSource).RowFilter = string.Format(_filterFormat, this[_primaryKey, this.CurrentRow.Index].Value);
                        }
                    }
                }
            }
            catch
            {

            }
        }
        #endregion

        #region Private
        //设置构造函数的参数
        private void SetMasterControl(DataSet cDataset, controlType eControlType)
        {
            //1.控件初始化赋值
            this.Controls.Add(childView);
            InitializeComponent();
            _cDataset = cDataset;
            childView._cDataset = cDataset;
            cModule.applyGridTheme(this);
            Dock = DockStyle.Fill;
            EControlType = eControlType;
            this.AllowUserToAddRows = false;

            //2.通过读取DataSet里面的Relations得到表的关联关系
            if (cDataset.Relations.Count <= 0)
            {
                return;
            }
            DataRelation oRelates;
            if (eControlType == controlType.outside)
            {
                oRelates = cDataset.Relations[1];
                childView.Add(oRelates.ParentTable.TableName, oRelates.ParentColumns[0].ColumnName, oRelates.ChildColumns[0].ColumnName);
            }
            else if (eControlType == controlType.middle)
            {
                oRelates = cDataset.Relations[cDataset.Relations.Count - 1];
                childView.Add2(oRelates.ChildTable.TableName);
            }

            //3.设置主外键对应关系
            oRelates = cDataset.Relations[0];
            //主表里面的值，副表里面的过滤字段
            setParentSource(oRelates.ParentTable.TableName,oRelates.ParentColumns[0].ColumnName, oRelates.ChildColumns[0].ColumnName);
        }

        private void SetControl(MasterControl oGrid)
        {
            oGrid.childView.RemoveControl();
            //oGrid.childView.Controls.RemoveByKey("ChildrenMaster");
            //
            //var oRelates = _cDataset.Relations[1];
            //oGrid.childView.Add(oRelates.ParentTable.TableName, oRelates.ChildColumns[0].ColumnName);
            

            //foreach (var oGridControl in oGrid.Controls)
            //{
            //    if (oGridControl.GetType() != typeof(detailControl))
            //    {
            //        continue;
            //    }
            //    var DetailControl =(detailControl)oGridControl;
            //    foreach (var odetailControl in DetailControl.Controls)
            //    {
            //        if (odetailControl.GetType() != typeof(MasterControl))
            //        {
            //            continue;
            //        }
            //        var OMasterControl = (MasterControl)odetailControl;
            //        foreach (var oMasterControl in OMasterControl.Controls)
            //        {
            //            if (oMasterControl.GetType() == typeof(detailControl))
            //            {
            //                ((detailControl)oMasterControl).Visible = false;
            //                return;
            //            }
            //        }
            //    }
            //}
        }

        //将List集合转换成DataTable
        private DataTable Fill(object obj)
        {
            if(!(obj is IList))
            {
                return null;
            }
            var objlist = obj as IList;
            if (objlist == null || objlist.Count <= 0)
            {
                return null;
            }
            var tType = objlist[0];
            DataTable dt = new DataTable(tType.GetType().Name);
            DataColumn column;
            DataRow row;
            System.Reflection.PropertyInfo[] myPropertyInfo = tType.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance);
            foreach (var t in objlist)
            {
                if (t == null)
                {
                    continue;
                }
                row = dt.NewRow();
                for (int i = 0, j = myPropertyInfo.Length; i < j; i++)
                {
                    System.Reflection.PropertyInfo pi = myPropertyInfo[i];
                    string name = pi.Name;
                    if (dt.Columns[name] == null)
                    {
                        column = new DataColumn(name, pi.PropertyType);
                        dt.Columns.Add(column);
                    }
                    row[name] = pi.GetValue(t, null);
                }
                dt.Rows.Add(row);
            }
            return dt;
        }
        #endregion
    }

 

2、detailControl变量作为一个容器用来保存子表格，代码如下：

public class detailControl : Ewin.Client.Frame.Controls.EwinPanel
    {
        #region 字段
        public List<DataGridView> childGrid = new List<DataGridView>();
        public DataSet _cDataset;
        #endregion

        #region 方法
        public void Add(string tableName, string strPrimaryKey, string strForeignKey)
        {
            //TabPage tPage = new TabPage() { Text = pageCaption };
            //this.Controls.Add(tPage);
            var newGrid = new MasterControl(_cDataset, controlType.middle) { Dock = DockStyle.Fill, DataSource = new DataView(_cDataset.Tables[tableName]) };
            newGrid.setParentSource(tableName, strPrimaryKey, strForeignKey);//设置主外键
            //newGrid.Name = "ChildrenMaster";
            //tPage.Controls.Add(newGrid);
            this.Controls.Add(newGrid);
            //this.BorderStyle = BorderStyle.FixedSingle;
            cModule.applyGridTheme(newGrid);
            cModule.setGridRowHeader(newGrid);
            newGrid.RowPostPaint += cModule.rowPostPaint_HeaderCount;
            childGrid.Add(newGrid);
        }

        public void Add2(string tableName)
        {
            //TabPage tPage = new TabPage() { Text = pageCaption };
            //this.Controls.Add(tPage);
            DataGridView newGrid = new Ewin.Client.Frame.Controls.EwinGrid() { Dock = DockStyle.Fill, DataSource = new DataView(_cDataset.Tables[tableName]) };
            newGrid.AllowUserToAddRows = false;
            //tPage.Controls.Add(newGrid);
            this.Controls.Add(newGrid);
            cModule.applyGridTheme(newGrid);
            cModule.setGridRowHeader(newGrid);
            newGrid.RowPostPaint += cModule.rowPostPaint_HeaderCount;
            childGrid.Add(newGrid);
        }

        public void RemoveControl()
        {
            this.Controls.Remove(childGrid[0]);
            childGrid.Clear();
        }
        #endregion

    }

 

3、cModule.cs用来设置样式

namespace Ewin.Client.Frame.UcGrid
{
    /// <summary>
    /// 折叠控件样式以及行数操作类
    /// </summary>
    sealed class cModule
    {
        #region CustomGrid
        static System.Windows.Forms.DataGridViewCellStyle dateCellStyle = new System.Windows.Forms.DataGridViewCellStyle { Alignment = DataGridViewContentAlignment.MiddleRight };
        static System.Windows.Forms.DataGridViewCellStyle amountCellStyle = new System.Windows.Forms.DataGridViewCellStyle { Alignment = DataGridViewContentAlignment.MiddleRight, Format = "N2" };
        static System.Windows.Forms.DataGridViewCellStyle gridCellStyle = new System.Windows.Forms.DataGridViewCellStyle
        {
            Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleLeft,
            BackColor = System.Drawing.Color.FromArgb(System.Convert.ToInt32(System.Convert.ToByte(79)), System.Convert.ToInt32(System.Convert.ToByte(129)), System.Convert.ToInt32(System.Convert.ToByte(189))),
            Font = new System.Drawing.Font("Segoe UI", (float)(10.0F), System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, System.Convert.ToByte(0)),
            ForeColor = System.Drawing.SystemColors.ControlLightLight,
            SelectionBackColor = System.Drawing.SystemColors.Highlight,
            SelectionForeColor = System.Drawing.SystemColors.HighlightText,
            WrapMode = System.Windows.Forms.DataGridViewTriState.True
        };
        static System.Windows.Forms.DataGridViewCellStyle gridCellStyle2 = new System.Windows.Forms.DataGridViewCellStyle
        {
            Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleLeft,
            BackColor = System.Drawing.SystemColors.ControlLightLight,
            Font = new System.Drawing.Font("Segoe UI", (float)(10.0F), System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, System.Convert.ToByte(0)),
            ForeColor = System.Drawing.SystemColors.ControlText,
            SelectionBackColor = System.Drawing.Color.FromArgb(System.Convert.ToInt32(System.Convert.ToByte(155)), System.Convert.ToInt32(System.Convert.ToByte(187)), System.Convert.ToInt32(System.Convert.ToByte(89))),
            SelectionForeColor = System.Drawing.SystemColors.HighlightText,
            WrapMode = System.Windows.Forms.DataGridViewTriState.False
        };
        static System.Windows.Forms.DataGridViewCellStyle gridCellStyle3 = new System.Windows.Forms.DataGridViewCellStyle
        {
            Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleLeft,
            BackColor = System.Drawing.Color.WhiteSmoke,
            Font = new System.Drawing.Font("Segoe UI", (float)(10.0F), System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, System.Convert.ToByte(0)),
            ForeColor = System.Drawing.SystemColors.WindowText,
            SelectionBackColor = System.Drawing.Color.FromArgb(System.Convert.ToInt32(System.Convert.ToByte(155)), System.Convert.ToInt32(System.Convert.ToByte(187)), System.Convert.ToInt32(System.Convert.ToByte(89))),
            SelectionForeColor = System.Drawing.SystemColors.HighlightText,
            WrapMode = System.Windows.Forms.DataGridViewTriState.True
        };

        //设置表格的主题样式
        static public void applyGridTheme(DataGridView grid)
        {
            grid.AllowUserToAddRows = false;
            grid.AllowUserToDeleteRows = false;
            grid.BackgroundColor = System.Drawing.SystemColors.Window;
            grid.BorderStyle = System.Windows.Forms.BorderStyle.None;
            grid.ColumnHeadersBorderStyle = System.Windows.Forms.DataGridViewHeaderBorderStyle.Single;
            grid.ColumnHeadersDefaultCellStyle = gridCellStyle;
            grid.ColumnHeadersHeight = 32;
            grid.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.DisableResizing;
            grid.DefaultCellStyle = gridCellStyle2;
            grid.EnableHeadersVisualStyles = false;
            grid.GridColor = System.Drawing.SystemColors.GradientInactiveCaption;
            //grid.ReadOnly = true;
            grid.RowHeadersVisible = true;
            grid.RowHeadersBorderStyle = System.Windows.Forms.DataGridViewHeaderBorderStyle.Single;
            grid.RowHeadersDefaultCellStyle = gridCellStyle3;
            grid.Font = gridCellStyle.Font;
        }

        //设置表格单元格样式
        static public void setGridRowHeader(DataGridView dgv, bool hSize = false)
        {
            dgv.TopLeftHeaderCell.Value = "NO ";
            dgv.TopLeftHeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleCenter;
            dgv.AutoResizeRowHeadersWidth(DataGridViewRowHeadersWidthSizeMode.AutoSizeToDisplayedHeaders);
            foreach (DataGridViewColumn cCol in dgv.Columns)
            {
                if (cCol.ValueType.ToString() == typeof(DateTime).ToString())
                {
                    cCol.DefaultCellStyle = dateCellStyle;
                }
                else if (cCol.ValueType.ToString() == typeof(decimal).ToString() || cCol.ValueType.ToString() == typeof(double).ToString())
                {
                    cCol.DefaultCellStyle = amountCellStyle;
                }
            }
            if (hSize)
            {
                dgv.RowHeadersWidth = dgv.RowHeadersWidth + 16;
            }
            dgv.AutoResizeColumns();
        }

        //设置表格的行号
        static public void rowPostPaint_HeaderCount(object obj_sender, DataGridViewRowPostPaintEventArgs e)
        {
            try
            {
                var sender = (DataGridView)obj_sender;
                //set rowheader count
                DataGridView grid = (DataGridView)sender;
                string rowIdx = System.Convert.ToString((e.RowIndex + 1).ToString());
                var centerFormat = new StringFormat();
                centerFormat.Alignment = StringAlignment.Center;
                centerFormat.LineAlignment = StringAlignment.Center;
                Rectangle headerBounds = new Rectangle(e.RowBounds.Left, e.RowBounds.Top,
                    grid.RowHeadersWidth, e.RowBounds.Height - sender.Rows[e.RowIndex].DividerHeight);
                e.Graphics.DrawString(rowIdx, grid.Font, SystemBrushes.ControlText,
                    headerBounds, centerFormat);
            }
            catch (Exception ex)
            {

            }
        }
        #endregion
    }

    /// <summary>
    /// 控件类型，是最外层的表格还是中间层的表格
    /// </summary>
    public enum controlType
    {
        outside = 0,
        middle = 1
    }

    /// <summary>
    /// 展开图标
    /// </summary>
    public enum rowHeaderIcons
    {
        expand = 0,
        collapse = 1
    }
}

　　

4、From页面调用

#region 使用方法一
            //var oDataSet = GetDataSet();
            //
            //masterDetail = new MasterControl(oDataSet, controlType.outside); 
            #endregion

            #region 使用方法二
            var dicRelateData1 = new Dictionary<string, string>();
            var dicRelateData2 = new Dictionary<string, string>();
            dicRelateData1.Add("Menu_ID","Menu_ID");//表格一和表格二之间的主外键关系
            dicRelateData2.Add("Menu_Name2","Menu_Name2");//表格二和表格三之间的主外键关系

masterDetail = new MasterControl(GetDataSource(), GetDataSource2(), GetDataSource3(), dicRelateData1, dicRelateData2, controlType.outside); #endregion panelView.Controls.Add(masterDetail);

　　　　

 昨天应领导要求，折叠控件增加了折叠线的效果，看起来有没有更加像模像样了。~~~

其实就在行重绘事件private void MasterControl_RowPostPaint(object obj_sender, DataGridViewRowPostPaintEventArgs e)里面增加了如下代码：

using (Pen p = new Pen(Color.GhostWhite))
{
var iHalfWidth = (e.RowBounds.Left + sender.RowHeadersWidth) / 2;
var oPointHLineStart = new Point(rect1.X + iHalfWidth, rect1.Y);
var oPointHLineEnd = new Point(rect1.X + iHalfWidth, rect1.Y + rect1.Height / 2);
e.Graphics.DrawLine(p, oPointHLineStart, oPointHLineEnd);
//折叠线
e.Graphics.DrawLine(p, oPointHLineEnd, new Point(oPointHLineEnd.X + iHalfWidth, oPointHLineEnd.Y));
}

效果如下：

 

2015-07-01

PS：原以为CS的控件大家不会太感兴趣，这两天很多园友找我要源码，其实并非舍不得将源码共享，只是很多东西融入到项目中了很难分离出来，需要时间整理，望理解。知道这么多园友对CS的控件也感兴趣，我就抽时间整理了下折叠控件的Demo。本着大家共同进步的原则将源码共享出来。好的东西就要共享，咱.Net也要慢慢走共享开源路线哈~~

源码下载