創建Winform用戶控件庫，創建用戶空間。起名叫RowMergeView.cs， RowMergeView 繼承於 DataGridView。
/// <summary> /// DataGridView行合併.請對屬性MergeColumnNames 賦值既可 /// </summary> public partial class RowMergeView : DataGridView { #region 構造函數 public RowMergeView() { InitializeComponent(); } #endregion #region 重寫的事件 protected override void OnPaint(PaintEventArgs pe) { // TODO: 在此處添加自定義繪製代碼 // 調用基類 OnPaint base.OnPaint(pe); } protected override void OnCellPainting(DataGridViewCellPaintingEventArgs e) { try { if (e.RowIndex > -1 && e.ColumnIndex > -1) { DrawCell(e); } else { //二維表頭 if (e.RowIndex == -1) { if (SpanRows.ContainsKey(e.ColumnIndex)) //被合併的列 { //畫邊框 Graphics g = e.Graphics; e.Paint(e.CellBounds, DataGridViewPaintParts.Background | DataGridViewPaintParts.Border); int left = e.CellBounds.Left, top = e.CellBounds.Top + 2, right = e.CellBounds.Right, bottom = e.CellBounds.Bottom; switch (SpanRows[e.ColumnIndex].Position) { case 1: left += 2; break; case 2: break; case 3: right -= 2; break; } //畫上半部分底色 g.FillRectangle(new SolidBrush(this._mergecolumnheaderbackcolor), left, top, right - left, (bottom - top) / 2); //畫中線 g.DrawLine(new Pen(this.GridColor), left, (top + bottom) / 2, right, (top + bottom) / 2); //寫小標題 StringFormat sf = new StringFormat(); sf.Alignment = StringAlignment.Center; sf.LineAlignment = StringAlignment.Center; g.DrawString(e.Value + "", e.CellStyle.Font, Brushes.Black, new Rectangle(left, (top + bottom) / 2, right - left, (bottom - top) / 2), sf); left = this.GetColumnDisplayRectangle(SpanRows[e.ColumnIndex].Left, true).Left - 2; if (left < 0) left = this.GetCellDisplayRectangle(-1, -1, true).Width; right = this.GetColumnDisplayRectangle(SpanRows[e.ColumnIndex].Right, true).Right - 2; if (right < 0) right = this.Width; g.DrawString(SpanRows[e.ColumnIndex].Text, e.CellStyle.Font, Brushes.Black, new Rectangle(left, top, right - left, (bottom - top) / 2), sf); e.Handled = true; } } } base.OnCellPainting(e); } catch(Exception ex) { LogManager.WriteError("DataGridView合併:",ex.ToString()); } } protected override void OnCellClick(DataGridViewCellEventArgs e) { base.OnCellClick(e); } #endregion #region 自定義方法 int UpRows = 0; //下面相同的行數 int DownRows = 0; //總行數 int count = 0; /// <summary> /// 畫單元格 /// </summary> /// <param name="e"></param> 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; if (this.MergeColumnNames.Contains(this.Columns[e.ColumnIndex].Name) && e.RowIndex != -1) { cellwidth = e.CellBounds.Width; Pen gridLinePen = new Pen(gridBrush); string curValue = e.Value == null ? "" : e.Value.ToString().Replace("\r\n","").Trim(); //string curSelected = this.CurrentRow.Cells[e.ColumnIndex].Value == null ? "" : this.CurrentRow.Cells[e.ColumnIndex].Value.ToString().Trim(); if (!string.IsNullOrEmpty(curValue)) { //上面相同的行數 UpRows = 0; //下面相同的行數 DownRows = 0; //總行數 count = 0; #region 獲取下面的行數 for (int i = e.RowIndex; i < this.Rows.Count; i++) { if (e.ColumnIndex > 0 && i != e.RowIndex) { if ((this.Rows[i].Cells[e.ColumnIndex].Value.ToString().Replace("\r\n", "").Trim().Equals(curValue)) && (this.Rows[i].Cells[0].Value.ToString().Replace("\r\n", "").Trim() == this.Rows[i - 1].Cells[0].Value.ToString().Replace("\r\n", "").Trim())) { DownRows++; if (e.RowIndex != i) { cellwidth = cellwidth < this.Rows[i].Cells[e.ColumnIndex].Size.Width ? cellwidth : this.Rows[i].Cells[e.ColumnIndex].Size.Width; } } else { break; } } else { if (this.Rows[i].Cells[e.ColumnIndex].Value.ToString().Replace("\r\n", "").Trim().Equals(curValue)) { DownRows++; if (e.RowIndex != i) { cellwidth = cellwidth < this.Rows[i].Cells[e.ColumnIndex].Size.Width ? cellwidth : this.Rows[i].Cells[e.ColumnIndex].Size.Width; } } else { break; } } } #endregion #region 獲取上面的行數 for (int i = e.RowIndex; i >= 0; i--) { if (e.ColumnIndex > 0 && i != e.RowIndex) { if ((this.Rows[i].Cells[e.ColumnIndex].Value.ToString().Replace("\r\n", "").Trim().Equals(curValue)) && (this.Rows[i].Cells[0].Value.ToString().Replace("\r\n", "").Trim() == this.Rows[i + 1].Cells[0].Value.ToString().Replace("\r\n", "").Trim())) { UpRows++; if (e.RowIndex != i) { cellwidth = cellwidth < this.Rows[i].Cells[e.ColumnIndex].Size.Width ? cellwidth : this.Rows[i].Cells[e.ColumnIndex].Size.Width; } } else { break; } } else { if (this.Rows[i].Cells[e.ColumnIndex].Value.ToString().Replace("\r\n", "").Trim().Equals(curValue)) { UpRows++; if (e.RowIndex != i) { cellwidth = cellwidth < this.Rows[i].Cells[e.ColumnIndex].Size.Width ? cellwidth : this.Rows[i].Cells[e.ColumnIndex].Size.Width; } } else { break; } } } #endregion count = DownRows + UpRows - 1; if (count < 2) { return; } } if (this.Rows[e.RowIndex].Selected) { backBrush.Color = e.CellStyle.SelectionBackColor; fontBrush.Color = e.CellStyle.SelectionForeColor; } //以背景色填充 e.Graphics.FillRectangle(backBrush, e.CellBounds); //畫字符串 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); } // 畫右邊線 e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1, e.CellBounds.Top, e.CellBounds.Right - 1, e.CellBounds.Bottom); e.Handled = true; } } /// <summary> /// 畫字符串 /// </summary> /// <param name="e"></param> /// <param name="cellwidth"></param> /// <param name="UpRows"></param> /// <param name="DownRows"></param> /// <param name="count"></param> 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; string displayValue = ""; if (!string.IsNullOrEmpty(e.Value.ToString())) { displayValue = e.Value.ToString(); if (displayValue.Length > 13 && displayValue.Length <= 26) { displayValue = displayValue.Substring(0, 12) + "\r\n" + displayValue.Substring(12, displayValue.Length - 12); } else if (displayValue.Length > 26) { displayValue = displayValue.Substring(0, 12) + "\r\n" + displayValue.Substring(12, 25) + "\r\n" + displayValue.Substring(25, displayValue.Length - 25); } } 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) { if (displayValue.Contains("\r\n")) { e.Graphics.DrawString(displayValue, e.CellStyle.Font, fontBrush, e.CellBounds.X + (cellwidth - 160) / 2, e.CellBounds.Y - cellheight * (UpRows - 1) + (cellheight * count - fontheight) / 2); } else { e.Graphics.DrawString(displayValue, e.CellStyle.Font, fontBrush, e.CellBounds.X + (cellwidth - fontwidth) / 2, e.CellBounds.Y - cellheight * (UpRows - 1) + (cellheight * count - fontheight) / 2); } } else if (e.CellStyle.Alignment == DataGridViewContentAlignment.MiddleLeft) { if (displayValue.Contains("\r\n")) { e.Graphics.DrawString(displayValue, e.CellStyle.Font, fontBrush, e.CellBounds.X, e.CellBounds.Y - cellheight * (UpRows - 1) + (cellheight * count - fontheight) / 2); } else { e.Graphics.DrawString(displayValue, e.CellStyle.Font, fontBrush, e.CellBounds.X, e.CellBounds.Y - cellheight * (UpRows - 1) + (cellheight * count - fontheight) / 2); } //e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X, e.CellBounds.Y - cellheight * (UpRows - 1) + (cellheight * count - fontheight) / 2); } else if (e.CellStyle.Alignment == DataGridViewContentAlignment.MiddleRight) { e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + cellwidth - fontwidth, e.CellBounds.Y - cellheight * (UpRows - 1) + (cellheight * count - fontheight) / 2); } else if (e.CellStyle.Alignment == DataGridViewContentAlignment.TopCenter) { e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + (cellwidth - fontwidth) / 2, e.CellBounds.Y - cellheight * (UpRows - 1)); } else if (e.CellStyle.Alignment == DataGridViewContentAlignment.TopLeft) { e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X, e.CellBounds.Y - cellheight * (UpRows - 1)); } else if (e.CellStyle.Alignment == DataGridViewContentAlignment.TopRight) { e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + cellwidth - fontwidth, e.CellBounds.Y - cellheight * (UpRows - 1)); } else { e.Graphics.DrawString((String)e.Value, e.CellStyle.Font, fontBrush, e.CellBounds.X + (cellwidth - fontwidth) / 2, e.CellBounds.Y - cellheight * (UpRows - 1) + (cellheight * count - fontheight) / 2); } } #endregion #region 屬性 /// <summary> /// 設置或獲取合併列的集合 /// </summary> [MergableProperty(false)] [Editor("System.Windows.Forms.Design.ListControlStringCollectionEditor, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))] [DesignerSerializationVisibility(System.ComponentModel.DesignerSerializationVisibility.Visible)] [Localizable(true)] [Description("設置或獲取合併列的集合"), Browsable(true), Category("單元格合併")] public List<string> MergeColumnNames { get { return _mergecolumnname; } set { _mergecolumnname = value; } } private List<string> _mergecolumnname = new List<string>(); #endregion #region 二維表頭 private struct SpanInfo //表頭信息 { public SpanInfo(string Text, int Position, int Left, int Right) { this.Text = Text; this.Position = Position; this.Left = Left; this.Right = Right; } public string Text; //列主標題 public int Position; //位置，1:左，2中，3右 public int Left; //對應左行 public int Right; //對應右行 } private Dictionary<int, SpanInfo> SpanRows = new Dictionary<int, SpanInfo>();//需要2維表頭的列 /// <summary> /// 合併列 /// </summary> /// <param name="ColIndex">列的索引</param> /// <param name="ColCount">需要合併的列數</param> /// <param name="Text">合併列後的文本</param> public void AddSpanHeader(int ColIndex, int ColCount, string Text) { if (ColCount < 2) { throw new Exception("行寬應大於等於2，合併1列無意義。"); } //將這些列加入列表 int Right = ColIndex + ColCount - 1; //同一大標題下的最後一列的索引 SpanRows[ColIndex] = new SpanInfo(Text, 1, ColIndex, Right); //添加標題下的最左列 SpanRows[Right] = new SpanInfo(Text, 3, ColIndex, Right); //添加該標題下的最右列 for (int i = ColIndex + 1; i < Right; i++) //中間的列 { SpanRows[i] = new SpanInfo(Text, 2, ColIndex, Right); } } /// <summary> /// 清除合併的列 /// </summary> public void ClearSpanInfo() { SpanRows.Clear(); //ReDrawHead(); } private void DataGridViewEx_Scroll(object sender, ScrollEventArgs e) { if (e.ScrollOrientation == ScrollOrientation.HorizontalScroll)// && e.Type == ScrollEventType.EndScroll) { timer1.Enabled = false; timer1.Enabled = true; } } //刷新顯示錶頭 public void ReDrawHead() { foreach (int si in SpanRows.Keys) { this.Invalidate(this.GetCellDisplayRectangle(si, -1, true)); } } private void timer1_Tick(object sender, EventArgs e) { timer1.Enabled = false; ReDrawHead(); } /// <summary> /// 二維表頭的背景顏色 /// </summary> [Description("二維表頭的背景顏色"), Browsable(true), Category("二維表頭")] public Color MergeColumnHeaderBackColor { get { return this._mergecolumnheaderbackcolor; } set { this._mergecolumnheaderbackcolor = value; } } private Color _mergecolumnheaderbackcolor = System.Drawing.SystemColors.Control; #endregion }
然後自行百度怎麼引用自己創造的用戶控件。隨後設置.請對屬性MergeColumnNames 賦值既可。