WinForm中DataGridView折叠控件【超好看】_实用技巧_

 public class MasterControl : DataGridView { #region 字段 private List rowCurrent = new List(); internal static int rowDefaultHeight = ; internal static int rowExpandedHeight = ; internal static int rowDefaultDivider = ; internal static int rowExpandedDivider = - ; internal static int rowDividerMargin = ; 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 = ; #endregion #region 构造函数 /// 
 /// 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("", oDataSet.Tables["T"].Columns["Menu_ID"], oDataSet.Tables["T"].Columns["Menu_ID"]); /// oDataSet.Relations.Add("", oDataSet.Tables["T"].Columns["Menu_Name"], oDataSet.Tables["T"].Columns["Menu_Name"]); /// 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 /// 
 /// 数据源DataSet，里面还有各个表的对应关系 /// 枚举类型 public MasterControl(DataSet cDataset, controlType eControlType) { SetMasterControl(cDataset, eControlType); } /// 
 /// 第二种使用方法 /// 
 /// 折叠控件第一层的集合 /// 折叠控件第二层的集合 /// 折叠控件第三层的集合 /// 第一二层之间对应主外键 /// 第二三层之间对应主外键 /// 枚举类型 public MasterControl(object lstData, object lstData, object lstData, Dictionary dicRelateKey, DictionarydicRelateKey, controlType eControlType) { var oDataSet = new DataSet(); try { var oTable = new DataTable(); oTable = Fill(lstData); oTable.TableName = "T"; var oTable = Fill(lstData); oTable.TableName = "T"; if (lstData == null || dicRelateKey == null || dicRelateKey.Keys.Count <= ) { oDataSet.Tables.AddRange(new DataTable[] { oTable, oTable }); oDataSet.Relations.Add("", oDataSet.Tables["T"].Columns[dicRelateKey.Keys.FirstOrDefault()], oDataSet.Tables["T"].Columns[dicRelateKey.Values.FirstOrDefault()]); } else { var oTable = Fill(lstData); oTable.TableName = "T"; oDataSet.Tables.AddRange(new DataTable[] { oTable, oTable, oTable }); //这是对应关系的时候主键必须唯一 oDataSet.Relations.Add("", oDataSet.Tables["T"].Columns[dicRelateKey.Keys.FirstOrDefault()], oDataSet.Tables["T"].Columns[dicRelateKey.Values.FirstOrDefault()]); oDataSet.Relations.Add("", oDataSet.Tables["T"].Columns[dicRelateKey.Keys.FirstOrDefault()], oDataSet.Tables["T"].Columns[dicRelateKey.Values.FirstOrDefault()]); } } catch { oDataSet = new DataSet(); } SetMasterControl(oDataSet, eControlType); } /// 
 /// 控件初始化 /// 
 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(, "expand.png"); this.RowHeaderIconList.Images.SetKeyName(, "collapse.png"); // //MasterControl // ((System.ComponentModel.ISupportInitialize)this).EndInit(); this.ResumeLayout(false); } #endregion #region 数据绑定 /// 
 /// 设置表之间的主外键关联 /// 
 /// DataTable的表名称 /// 外键 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 + "={}"; } else { _filterFormat = foreignKey + "=\'{}\'"; } } #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.ToInt((double)(rowDefaultHeight - ) / ), System.Convert.ToInt((double)(rowDefaultHeight - ) / ), , ); 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 + ); oParent.Rows[oParent.ExpandRowIndex].DividerHeight = rowDefaultHeight * (this.Rows.Count + ); if (oParent.Rows[oParent.ExpandRowIndex].Height > ) { oParent.Rows[oParent.ExpandRowIndex].Height = ; oParent.Rows[oParent.ExpandRowIndex].Height = ; } } } //展开 else { if (!(rowCurrent.Count == )) { var eRow = rowCurrent[]; 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 = + rowDefaultHeight * (((DataView)(childView.childGrid[].DataSource)).Count + ); this.Rows[e.RowIndex].DividerHeight = + rowDefaultHeight * (((DataView)(childView.childGrid[].DataSource)).Count); //设置一个最大高度 if (this.Rows[e.RowIndex].Height > ) { this.Rows[e.RowIndex].Height = ; this.Rows[e.RowIndex].DividerHeight = ; } 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 + ); oParent.Rows[oParent.ExpandRowIndex].DividerHeight = this.Rows[e.RowIndex].DividerHeight + rowDefaultHeight * (this.Rows.Count + ); if (oParent.Rows[oParent.ExpandRowIndex].Height > ) { oParent.Rows[oParent.ExpandRowIndex].Height = ; oParent.Rows[oParent.ExpandRowIndex].Height = ; } } //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 - ) / )), (int)(e.RowBounds.Y + ((double)(rowDefaultHeight - ) / )), , ); if (collapseRow) { if (this.rowCurrent.Contains(e.RowIndex)) { #region 更改点开后背景色 刘金龙 var rect = new Rectangle(e.RowBounds.X, e.RowBounds.Y + rowDefaultHeight, e.RowBounds.Width, e.RowBounds.Height - rowDefaultHeight); using (Brush b = new SolidBrush(Color.FromArgb(, , ))) { e.Graphics.FillRectangle(b, rect); } #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 + ); childView.Width = e.RowBounds.Right - sender.RowHeadersWidth; childView.Height = System.Convert.ToInt(sender.Rows[e.RowIndex].DividerHeight - ); childView.Visible = true; } else { childView.Visible = false; e.Graphics.DrawImage
                
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