asp.net datagrid实现多层表头

    tb.Rows.AddAt(0,dgi1);
    tb.Rows.AddAt(1,dgi2);
   }
   e.Item.Cells[1].Visible=false;
  }

  private void Calendar1_SelectionChanged(object sender, System.EventArgs e)
  {
   this.Session["dataset"]=null;
   this.InitData();
  }

  private void delbutton_Click(object sender, EventArgs e)
  {
   Button tmpbutton=(Button)sender;
   string id=tmpbutton.ID;
   id=id.Remove(id.Length-1,1);
   string sqlcmd="delete from dayenter where id="+id;
   string connstring="workstation id=SERVER;packet size=4096;user id=sa;data source=''''.'''';persist security info=True;initial catalog=winneroa;password=pxh2003";
   SqlConnection conn=new SqlConnection(connstring);
   try
   {
    conn.Open();
   }
   catch(Exception err)
   {
    Response.Write(err.ToString());
   }
   SqlCommand cmd=new SqlCommand(sqlcmd,conn);
   try
   {
    cmd.ExecuteNonQuery();
    this.Session["dataset"]=null;
    this.InitData();
   }
   catch(Exception err)
   {
    Response.Write(err.ToString()+sqlcmd);
   }
   finally
   {
    conn.Close();
   }
  }
 }
}

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