DataGrid脚眉显示合计

答案：
创建一个全局变量   
Public double Sumdb; 
 
private void DataGrid1_ItemCreated(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e) 
         {             
              ListItemType lit=e.Item.ItemType; 
              if(lit==ListItemType.Footer) 
              { 
              
                   TableCell tc1=e.Item.Cells[3]; 
                   TableCell tc2=e.Item.Cells[4]; 
                   TableCell tc3=e.Item.Cells[5]; 
                   TableCell tc4=e.Item.Cells[6]; 
              
                   Label L_xj=new Label(); 
                   L_xj.ID="lb_xj"; 
                   L_xj.Width=30; 
                   L_xj.Text="合计"; 
                   tc1.Controls.Add(L_xj); 
 
                   Label L_SumData=new Label(); 
                   L_SumData.ID="L_SumData"; 
                   L_SumData.Width=30; 
                   L_SumData.Text=SumData(); 
                   tc2.Controls.Add(L_SumData); 
                   
Label L_zj=new Label(); 
                   L_zj.ID="lb_zj"; 
                   L_zj.Width=30; 
                   L_zj.Text="总合计"; 
                   tc1.Controls.Add(L_zj); 
 
                   Label L_SumPage = new Label(); 
                   L_SumPage.ID=”l_sumPage”; 
                   L_SumPage.Width=30; 
                   L_SumPage.Text = Sumdb.ToString(); 
                   tc4.Controls.Add(L_SumPage); 
              } 
         }
private void DataGrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e) 
         { 
              if(e.Item.ItemType==ListItemType.AlternatingItem || e.Item.ItemType==ListItemType.Item) 
              { 
                   if( Convert.ToString( ((DataRowView)e.Item.DataItem)["M_sum"]) != string.Empty) 
                   { 
                       dataSum += Convert.ToDouble(((DataRowView)e.Item.DataItem)["M_sum"]); 
                   } 
              } 
         } 
//M_sum   为合计的字段名，绑定在DataGrid 的！ 

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