DataGridView多維表頭設置

通過：dataGridView1.TopLeftHeaderCell.Value = "表頭\n回車";設置表頭。
DataGridView實現多維表頭

在做信息管理系統時，很多中式報表都是多維的，要實現報表數據顯示，通常要用到多維表頭。然而，非常遺憾的是，Winform中DataGrid、DataGridView本身不提供多維表頭設計，要實現多維報表只好利用第三方的控件。通過對DataGridView的擴展，利用標題行進行重繪，可實現多維表頭的友好界面。下面是對多維表頭的探討和實現。

1、常用多表頭制作方法

     a.第三方控件實現多維表頭:FlexGrid--展示效果很好，就是數據量大加載時顯示速度較慢。

     b.報表方式實現多維表頭：CrystalReport、Grid++Report--通過預覽方式實現數據顯示

     c、DataGridView實現多維表頭

2、DataGridView多維表頭實現原理

     通過重繪標題欄進行多欄實現,通過RowSpan和ColSpan來進行合並，類似Html的Table實現方式。

3、調用方法

                   
          private  
          void Form1_Load( 
          object sender, EventArgs e) 
          
        { 
          
            InitDataTable(); 
          
            InitDataGridView(); 
          
        } 
          
 
          
        DataTable table =  
          new DataTable(); 
          
 
          
         
          private  
          void InitDataTable() 
          
        {           
          
 
          
            DataColumn col; 
          
 
          
            col =  
          new DataColumn(); 
          
            col.ColumnName =  
          " 
          客戶名稱 
          "; 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.ColumnName =  
          " 
          產品名稱 
          "; 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.ColumnName =  
          " 
          規格 
          "; 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.ColumnName =  
          " 
          單位 
          "; 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.ColumnName =  
          " 
          期初存貨數量 
          "; 
          
            col.DataType = System.Type.GetType( 
          " 
          System.Decimal 
          "); 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.ColumnName =  
          " 
          期初貨款 
          "; 
          
            col.DataType = System.Type.GetType( 
          " 
          System.Decimal 
          "); 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.ColumnName =  
          " 
          期初帳款 
          "; 
          
            col.DataType = System.Type.GetType( 
          " 
          System.Decimal 
          "); 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.ColumnName =  
          " 
          發貨數量 
          "; 
          
            col.DataType = System.Type.GetType( 
          " 
          System.Decimal 
          "); 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.ColumnName =  
          " 
          發貨金額 
          "; 
          
            col.DataType = System.Type.GetType( 
          " 
          System.Decimal 
          "); 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.ColumnName =  
          " 
          開票數量 
          "; 
          
            col.DataType = System.Type.GetType( 
          " 
          System.Decimal 
          "); 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.ColumnName =  
          " 
          開票金額 
          "; 
          
            col.DataType = System.Type.GetType( 
          " 
          System.Decimal 
          "); 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.ColumnName =  
          " 
          回款數量 
          "; 
          
            col.DataType = System.Type.GetType( 
          " 
          System.Decimal 
          "); 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.DataType = System.Type.GetType( 
          " 
          System.Decimal 
          "); 
          
            col.ColumnName =  
          " 
          回款金額 
          "; 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.DataType = System.Type.GetType( 
          " 
          System.Decimal 
          "); 
          
            col.ColumnName =  
          " 
          未開票回款數量 
          "; 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.DataType = System.Type.GetType( 
          " 
          System.Decimal 
          "); 
          
            col.ColumnName =  
          " 
          未開票回款金額 
          "; 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.DataType = System.Type.GetType( 
          " 
          System.Decimal 
          "); 
          
            col.ColumnName =  
          " 
          期末存貨數量 
          "; 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.DataType = System.Type.GetType( 
          " 
          System.Decimal 
          "); 
          
            col.ColumnName =  
          " 
          期末應收貨款 
          "; 
          
            table.Columns.Add(col); 
          
 
          
            col =  
          new DataColumn(); 
          
            col.DataType = System.Type.GetType( 
          " 
          System.Decimal 
          "); 
          
            col.ColumnName =  
          " 
          期末應收帳款 
          "; 
          
            table.Columns.Add(col); 
          
        } 
          
 
          
         
          private  
          void  InitDataGridView() 
          
        { 
          
            MutilGridHeader topRow =  
          new MutilGridHeader(); 
          
            topRow.SetRowCol( 
          3,  
          18); 
          
 
          
             
          // 
          第一行 
          
            topRow.Cells[ 
          0][ 
          0].Value =  
          " 
          客戶 
          "; 
          
            topRow.Cells[ 
          0][ 
          0].RowSpan =  
          3; 
          
 
          
            topRow.Cells[ 
          0][ 
          1].Value =  
          " 
          產品名稱 
          "; 
          
            topRow.Cells[ 
          0][ 
          1].RowSpan =  
          3; 
          
 
          
            topRow.Cells[ 
          0][ 
          2].Value =  
          " 
          規格 
          "; 
          
            topRow.Cells[ 
          0][ 
          2].RowSpan =  
          3; 
          
 
          
            topRow.Cells[ 
          0][ 
          3].Value =  
          " 
          單位 
          "; 
          
            topRow.Cells[ 
          0][ 
          3].RowSpan =  
          3; 
          
 
          
            topRow.Cells[ 
          0][ 
          4].Value =  
          " 
          期初 
          "; 
          
            topRow.Cells[ 
          0][ 
          4].ColSpan =  
          3; 
          
 
          
            topRow.Cells[ 
          0][ 
          7].Value =  
          " 
          本期 
          "; 
          
            topRow.Cells[ 
          0][ 
          7].ColSpan =  
          8; 
          
 
          
            topRow.Cells[ 
          0][ 
          15].Value =  
          " 
          期末 
          "; 
          
            topRow.Cells[ 
          0][ 
          15].ColSpan =  
          3; 
          
 
          
 
          
             
          // 
          第二行 
          
            topRow.Cells[ 
          1][ 
          4].Value =  
          " 
          存貨數量 
          "; 
          
            topRow.Cells[ 
          1][ 
          4].RowSpan =  
          2; 
          
 
          
            topRow.Cells[ 
          1][ 
          5].Value =  
          " 
          應收貨款 
          "; 
          
            topRow.Cells[ 
          1][ 
          5].RowSpan =  
          2; 
          
 
          
            topRow.Cells[ 
          1][ 
          6].Value =  
          " 
          應收帳款 
          "; 
          
            topRow.Cells[ 
          1][ 
          6].RowSpan =  
          2; 
          
 
          
            topRow.Cells[ 
          1][ 
          7].Value =  
          " 
          發貨 
          "; 
          
            topRow.Cells[ 
          1][ 
          7].ColSpan =  
          2; 
          
 
          
            topRow.Cells[ 
          1][ 
          9].Value =  
          " 
          開票 
          "; 
          
            topRow.Cells[ 
          1][ 
          9].ColSpan =  
          2; 
          
 
          
            topRow.Cells[ 
          1][ 
          11].Value =  
          " 
          回款 
          "; 
          
            topRow.Cells[ 
          1][ 
          11].ColSpan =  
          2; 
          
 
          
            topRow.Cells[ 
          1][ 
          13].Value =  
          " 
          未開票回款 
          "; 
          
            topRow.Cells[ 
          1][ 
          13].ColSpan =  
          2; 
          
 
          
            topRow.Cells[ 
          1][ 
          15].Value =  
          " 
          存貨數量 
          "; 
          
            topRow.Cells[ 
          1][ 
          15].RowSpan =  
          2; 
          
 
          
            topRow.Cells[ 
          1][ 
          16].Value =  
          " 
          應收貨款 
          "; 
          
            topRow.Cells[ 
          1][ 
          16].RowSpan =  
          2; 
          
 
          
            topRow.Cells[ 
          1][ 
          17].Value =  
          " 
          應收票款 
          "; 
          
            topRow.Cells[ 
          1][ 
          17].RowSpan =  
          2; 
          
 
          
             
          // 
          第三行 
          
            topRow.Cells[ 
          2][ 
          7].Value =  
          " 
          數量 
          "; 
          
            topRow.Cells[ 
          2][ 
          8].Value =  
          " 
          金額 
          "; 
          
            topRow.Cells[ 
          2][ 
          9].Value =  
          " 
          數量 
          "; 
          
            topRow.Cells[ 
          2][ 
          10].Value =  
          " 
          金額 
          "; 
          
            topRow.Cells[ 
          2][ 
          11].Value =  
          " 
          數量 
          "; 
          
            topRow.Cells[ 
          2][ 
          12].Value =  
          " 
          金額 
          "; 
          
            topRow.Cells[ 
          2][ 
          13].Value =  
          " 
          數量 
          "; 
          
            topRow.Cells[ 
          2][ 
          14].Value =  
          " 
          金額 
          "; 
          
 
          
 
          
            dataGridViewEx1.Header = topRow; 
          
            dataGridViewEx1.DataSource = table; 
          
            table.DefaultView.AllowNew =  
          false; 
          
 
          
            dataGridViewEx1.Columns[ 
          0].Width =  
          120; 
          
            dataGridViewEx1.Columns[ 
          1].Width =  
          100; 
          
            dataGridViewEx1.Columns[ 
          2].Width =  
          80; 
          
             
          for( 
          int i =  
          2;i< 
          18;i++) 
          
                dataGridViewEx1.Columns[i].Width =  
          60; 
          
 
          
         
          } 
         

Datagridview 實現二維表頭
      最近把我們的b/s系統,增加智能客戶端的功能。確實智能客戶端是非常好用的東西。可惜winform的控件功能不怎么強大,相比vb差很多啊。比如DataGridView不支持二維表頭,不支持表尾合計,相比之下 web的好辦多了（還是喜歡Web的排版、導航，但喜歡Win的操作性，希望WPF早日流行）。

       但是 MIS系統沒有二維表頭確實是客戶不能接受的,嘗試了com控件flexgrid或者開源的SourceGrid3，但都不怎么好用,於是想改造一下DataGridView。我的做法是在CellPainting做手腳。花了一天時間嘗試，只是做出原型，還沒有完善，希望有需要的朋友少走彎路。

  1,繼承DataGridView，添加表頭信息類。
  2，添加CellPainting，代碼如下：

   private   void  DataGridViewEx_CellPainting( object  sender, DataGridViewCellPaintingEventArgs e)
         {
            if (e.RowIndex == -1)
            {
             //   int w = dataGridView1.HorizontalScrollingOffset + dataGridView1.TopLeftHeaderCell.Size.Width + dataGridView1.Columns[0].Width + 10;


                Rectangle newRect = new Rectangle(e.CellBounds.X + 1,
               e.CellBounds.Y + 1, e.CellBounds.Width - 4,
               e.CellBounds.Height - 4);

                using (
                    Brush gridBrush = new SolidBrush(this.GridColor),
                    backColorBrush = new SolidBrush(e.CellStyle.BackColor))
                {
                    using (Pen gridLinePen = new Pen(gridBrush))
                    {
                        // Erase the cell.
                        e.Graphics.FillRectangle(backColorBrush, e.CellBounds);

                        // Draw the grid lines (only the right and bottom lines;
                        // DataGridView takes care of the others).
                        e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left,
                            e.CellBounds.Bottom - 1, e.CellBounds.Right - 1,
                            e.CellBounds.Bottom - 1);
                        if (e.ColumnIndex > -1 && topRow!=null&&topRow.Cells[e.ColumnIndex].ColSpan>1)
                        {
                            e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1,
                                e.CellBounds.Top + e.ClipBounds.Height / 2, e.CellBounds.Right - 1,
                                e.CellBounds.Bottom);
                        }
                        else
                        {
                            e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1,
                                                          e.CellBounds.Top, e.CellBounds.Right - 1,
                                                          e.CellBounds.Bottom);
                        }

                        // Draw the inset highlight box.
                        //   e.Graphics.DrawRectangle(Pens.Blue, newRect);

                        int scale = e.CellBounds.Height/3;
                        if (e.ColumnIndex > -1 && topRow.Cells[e.ColumnIndex].Text != null)
                        {
                            scale= e.CellBounds.Height / 2;
                            e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - e.CellBounds.Height / 2, e.CellBounds.Right, e.CellBounds.Bottom - e.CellBounds.Height / 2);
                        }
                        // Draw the text content of the cell, ignoring alignment.

                      

                        if (e.Value != null)
                        {
                            e.Graphics.DrawString(e.Value.ToString(), e.CellStyle.Font,
                                Brushes.Crimson, e.CellBounds.X + 2,
                                e.CellBounds.Y + scale+ 2, StringFormat.GenericDefault);



                        }




                        if (e.ColumnIndex > -1 &&  topRow.Cells[e.ColumnIndex].RelateIndex > -1 && topRow.Cells[e.ColumnIndex].Text!=null)
                    
                        {
                            Rectangle recCell = new Rectangle(e.CellBounds.X - 1 - topRow.Cells[e.ColumnIndex].SpanRowWith,
           e.CellBounds.Y + 1, topRow.Cells[e.ColumnIndex].SpanRowWith,
           e.CellBounds.Height / 2);


                            StringFormat sf = new StringFormat();

                            sf.Alignment = StringAlignment.Center;


                            e.Graphics.DrawString(topRow.Cells[e.ColumnIndex].Text, e.CellStyle.Font, Brushes.Crimson, recCell, sf);

                        }
               
                        e.Handled = true;
                    }
                }
            }

        }

3，調用方法

  dataGridViewEx1.TopRow.Cells[ 2 ].Text  =   " 入庫 " ;
            dataGridViewEx1.TopRow.Cells[ 2 ].ColSpan  =   2 ;


            dataGridViewEx1.TopRow.Cells[ 4 ].Text  =   " 出庫 " ;
            dataGridViewEx1.TopRow.Cells[ 4 ].ColSpan  =   2 ;

4，效果圖

至於表尾合計，也做出了原型。二維表頭+表尾合計，基本上滿足需求了。
url: http://greatverve.cnblogs.com/archive/2012/07/17/TopLeftHeaderCell.html