DataGridView二维表头与合并单元格.doc

DataGridView二维表头与合并单元格1、在项目中添加“组件类”。2、所引用的命名空间如下：using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Drawing;using System.Drawing.Design;using System.Diagnostics;3、DataGridView二维表头与合并单元格类，继承DataGridView类public partial class HeaderUnitView : DataGridView private TreeView _columnTreeView; private ArrayList _columnList = new ArrayList(); private int _cellHeight = 17; public int CellHeight get return _cellHeight; set _cellHeight = value; private int _columnDeep = 1; private bool HscrollRefresh = false; / / 水平滚动时是否刷新表头，数据较多时可能会闪烁，不刷新时可能显示错误 / Description(水平滚动时是否刷新表头，数据较多时可能会闪烁，不刷新时可能显示错误) public bool RefreshAtHscroll get return HscrollRefresh; set HscrollRefresh = value; / / 构造函数 / public HeaderUnitView() InitializeComponent(); this.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.DisableResizing; /设置列高度显示模式 public HeaderUnitView(IContainer container) container.Add(this); InitializeComponent(); Description(设置或获得合并表头树的深度) public int ColumnDeep get if (this.Columns.Count = 0) _columnDeep = 1; this.ColumnHeadersHeight = _cellHeight * _columnDeep; return _columnDeep; set if (value 1) _columnDeep = 1; else _columnDeep = value; this.ColumnHeadersHeight = _cellHeight * _columnDeep; Description(添加合并式单元格绘制的所需要的节点对象) public TreeView ColumnTreeView get return _columnTreeView; set if (_columnTreeView != null) for (int i = 0; i = _columnTreeView.Length - 1; i+) _columnTreeViewi.Dispose(); _columnTreeView = value; Description(设置添加的字段树的相关属性) public TreeView ColumnTreeViewNode get return _columnTreeView0; / / 设置或获取合并列的集合 / MergableProperty(false) Editor(System.Windows.Forms.Design.ListControlStringCollectionEditor, System.Design, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, typeof(UITypeEditor) DesignerSerializationVisibility(System.ComponentModel.DesignerSerializationVisibility.Visible) Localizable(true) Description(设置或获取合并列的集合), Browsable(true), Category(单元格合并) public List MergeColumnNames get return _mergecolumnname; set _mergecolumnname = value; private List _mergecolumnname = new List(); public ArrayList NadirColumnList get if (_columnTreeView = null) return null; if (_columnTreeView0 = null) return null; if (_columnTreeView0.Nodes = null) return null; if (_columnTreeView0.Nodes.Count = 0) return null; _columnList.Clear(); GetNadirColumnNodes(_columnList, _columnTreeView0.Nodes0, false); return _columnList; / /绘制合并表头 / /合并表头节点 /绘图参数集 /结点深度 / public void PaintUnitHeader( TreeNode node, System.Windows.Forms.DataGridViewCellPaintingEventArgs e, int level) /根节点时退出递归调用 if (level = 0) return; RectangleF uhRectangle; int uhWidth; SolidBrush gridBrush = new SolidBrush(this.GridColor); SolidBrush backColorBrush = new SolidBrush(e.CellStyle.BackColor); Pen gridLinePen = new Pen(gridBrush); StringFormat textFormat = new StringFormat(); textFormat.Alignment = StringAlignment.Center; uhWidth = GetUnitHeaderWidth(node); if (node.Nodes.Count = 0) uhRectangle = new Rectangle(e.CellBounds.Left, e.CellBounds.Top + node.Level * _cellHeight, uhWidth - 1, _cellHeight * (_columnDeep - node.Level) - 1); else uhRectangle = new Rectangle( e.CellBounds.Left, e.CellBounds.Top + node.Level * _cellHeight, uhWidth - 1, _cellHeight - 1); /画矩形 e.Graphics.FillRectangle(backColorBrush, uhRectangle); /划底线 e.Graphics.DrawLine(gridLinePen , uhRectangle.Left , uhRectangle.Bottom , uhRectangle.Right , uhRectangle.Bottom); /划右端线 e.Graphics.DrawLine(gridLinePen , uhRectangle.Right , uhRectangle.Top , uhRectangle.Right , uhRectangle.Bottom); /写字段文本 e.Graphics.DrawString(node.Text, this.Font , new SolidBrush(e.CellStyle.ForeColor) , uhRectangle.Left + uhRectangle.Width / 2 - e.Graphics.MeasureString(node.Text, this.Font).Width / 2 - 1 , uhRectangle.Top + uhRectangle.Height / 2 - e.Graphics.MeasureString(node.Text, this.Font).Height / 2); /递归调用() if (node.PrevNode = null) if (node.Parent != null) PaintUnitHeader(node.Parent, e, level - 1); / / 获得合并标题字段的宽度 / / 字段节点 / 字段宽度 / private int GetUnitHeaderWidth(TreeNode node) /获得非最底层字段的宽度 int uhWidth = 0; /获得最底层字段的宽度 if (node.Nodes = null) return this.ColumnsGetColumnListNodeIndex(node).Width; if (node.Nodes.Count = 0) return this.ColumnsGetColumnListNodeIndex(node).Width; for (int i = 0; i = node.Nodes.Count - 1; i+) uhWidth = uhWidth + GetUnitHeaderWidth(node.Nodesi); return uhWidth; / / 获得底层字段索引 / / 底层字段节点 / 索引 / private int GetColumnListNodeIndex(TreeNode node) for (int i = 0; i = _columnList.Count - 1; i+) if (TreeNode)_columnListi).Equals(node) return i; return -1; / / 获得底层字段集合 / / 底层字段集合 / 字段节点 / 向上搜索与否 / private void GetNadirColumnNodes( ArrayList alList, TreeNode node, Boolean isChecked) if (isChecked = false) if (node.FirstNode = null) alList.Add(node); if (node.NextNode != null) GetNadirColumnNodes(alList, node.NextNode, false); return; if (node.Parent != null) GetNadirColumnNodes(alList, node.Parent, true); return; else if (node.FirstNode != null) GetNadirColumnNodes(alList, node.FirstNode, false); return; else if (node.FirstNode = null) return; else if (node.NextNode != null) GetNadirColumnNodes(alList, node.NextNode, false); return; if (node.Parent != null) GetNadirColumnNodes(alList, node.Parent, true); return; / / 滚动 / / protected override void OnScroll(ScrollEventArgs e) bool scrollDirection = (e.ScrollOrientation = ScrollOrientation.HorizontalScroll); base.OnScroll(e); if (RefreshAtHscroll & scrollDirection) this.Refresh(); / / 列宽度改变的重写 / / protected override void OnColumnWidthChanged(DataGridViewColumnEventArgs e) Graphics g = Graphics.FromHwnd(this.Handle); float uwh = g.MeasureString(e.Column.HeaderText, this.Font).Width; if (uwh = e.Column.Width) e.Column.Width = Convert.ToInt16(uwh); base.OnColumnWidthChanged(e); / / 单元格绘制(重写) / / / protected override void OnCellPainting(System.Windows.Forms.DataGridViewCellPaintingEventArgs e) try if (e.RowIndex -1 & e.ColumnIndex -1) DrawCell(e); else /行标题不重写 if (e.ColumnIndex = NadirColumnList.Count) e.Handled = true; return; PaintUnitHeader(TreeNode)NadirColumnListe.ColumnIndex , e , _columnDeep); e.Handled = true; catch #region 合并单元格 / / 画单元格 / / private void DrawCell(DataGridViewCellPaintingEventArgs e) if (e.CellStyle.Alignment = DataGridViewContentAlignment.NotSet) e.CellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter; Brush gridBrush = new SolidBrush(this.GridColor); SolidBrush backBrush = new SolidBrush(e.CellStyle.BackColor); SolidBrush fontBrush = new SolidBrush(e.CellStyle.ForeColor); int cellwidth; /上面相同的行数 int UpRows = 0; /下面相同的行数 int DownRows = 0; /总行数 int count = 0; if (this.MergeColumnNames.Contains(this.Columnse.ColumnIndex.Name) & e.RowIndex != -1) cellwidth = e.CellBounds.Width; Pen gridLinePen = new Pen(gridBrush); string curValue = e.Value = null ? : e.Value.ToString().Trim(); string curSelected = this.CurrentRow.Cellse.ColumnIndex.Value = null ? : this.CurrentRow.Cellse.ColumnIndex.Value.ToString().Trim(); if (!string.IsNullOrEmpty(curValue) #region 获取下面的行数 for (int i = e.RowIndex; i this.Rows.Count; i+) if (this.Rowsi.Cellse.ColumnIndex.Value.ToString().Equals(curValue) /this.Rowsi.Cellse.ColumnIndex.Selected = this.Rowse.RowIndex.Cellse.ColumnIndex.Selected; DownRows+; if (e.RowIndex != i) cellwidth = cellwidth = 0; i-) if (this.Rowsi.Cellse.ColumnIndex.Value.ToString().Equals(curValue) /this.Rowsi.Cellse.ColumnIndex.Selected = this.Rowse.RowIndex.Cellse.ColumnIndex.Selected; UpRows+; if (e.RowIndex != i) cellwidth = cellwidth this.Rowsi.Cellse.ColumnIndex.Size.Width ? cellwidth : this.Rowsi.Cellse.ColumnIndex.Size.Width; else break; #endregion count = DownRows + UpRows - 1; if (count 2) return; if (this.Rowse.RowIndex.Selected) backBrush.Color = e.CellStyle.SelectionBackColor; fontBrush.Color = e.CellStyle.SelectionForeColor; /以背景色填充 e.Graphics.FillRectangle(backBrush, e.CellBounds); /画字符串 PaintingFont(e, cellwidth, UpRows, DownRows, count); if (DownRows = 1) e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - 1, e.CellBounds.Right - 1, e.CellBounds.Bottom - 1); count = 0; / 画右边线 e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1, e.CellBounds.Top, e.CellBounds.Right - 1, e.CellBounds.Bottom); e.Handled = true; / / 画字符串 / / / / / / private void PaintingFont(System.Windows.Forms.DataGridViewCellPaintingEventArgs e, int cellwidth, int UpRows, int DownRows, int count) SolidBrush fontBrush = new SolidBrush(e.CellStyle.ForeColor); int fontheight = (int)e.Graphics.MeasureString(e.Value.ToString(), e.CellStyle.Font).Height; int fontwidth = (int)e.Graphics.MeasureString(e.Value.ToString(), e.CellStyle.Font).Width; int cellheight = e.CellBounds.Height; if (e.CellStyle.Alignment = DataGridViewContentAlignment.BottomCenter) e.Graphics.DrawString(String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + (cellwidth - fontwidth) / 2, e.CellBounds.Y + cellheight * DownRows - fontheight); else if (e.CellStyle.Alignment = DataGridViewContentAlignment.BottomLeft) e.Graphics.DrawString(String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X, e.CellBounds.Y + cellheight * DownRows - fontheight); else if (e.CellStyle.Alignment = DataGridViewContentAlignment.BottomRight) e.Graphics.DrawString(String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + cellwidth - fontwidth, e.CellBounds.Y + cellheight * DownRows - fontheight); else if (e.CellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter) e.Graphics.DrawString(String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + (cellwidth - fontwidth) /