datagrid带模板列绑定空数据集出错的问题:GridView比DataGrid好的原因之一

BUG描述：datagrid带模板列绑定空数据集时会出错，而同样的代码asp.net 2.0中的GridView不会出错(难到MS已经认识到这一点，所以datagrid也被2.0抛弃了,不过gridview继承自不同的基类，害我改oracle,sqlserver,access的三方万能分页控件好辛苦呀)

Bug存在于 asp.net 1.1 asp.net 2.0

测试工具：vs.net 2003,vs.net 2005,vs.net 2005 sp1,SQLserver

测试过程：
setp1:
//无绑定列，采用自动生成
WebForm1.aspx:
<form id="Form1" method="post" runat="server">
 <asp:DataGrid ID=DataGrid1 runat=server>       
        </asp:DataGrid>
</form>
WebForm1.cs:
private void Page_Load(object sender, System.EventArgs e)
  {
   SqlDataReader Reader2 = DBHelper("select 26 age, 'test' test where 1=0");
   DataGrid1.DataSource = Reader2;
   DataGrid1.DataBind();
   Reader2.Close(); 
  }

  SqlDataReader DBHelper(string sql)
  {
   SqlConnection conn = new SqlConnection("server=localhost;uid=sa;pwd=;database=Northwind");
   SqlCommand cmd = new SqlCommand(sql, conn);
   conn.Open();
   SqlDataReader Reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
   return Reader;
  }
程序执法成功，DataGrid无显示

setp2:
//绑定列，采用自动生成
WebForm1.aspx:
<form id="Form1" method="post" runat="server">
  <asp:DataGrid ID=DataGrid1 runat=server>
         <Columns>
          <asp:TemplateColumn>
           <ItemTemplate>
            <asp:CheckBox ID=ck1 runat=server />
           </ItemTemplate>
          </asp:TemplateColumn>
         </Columns>
        </asp:DataGrid>

</form>
WebForm1.cs:
代码不变

程序执行失败，在做DataGrid1.DataBind()时提示
Invalid attempt to Read when reader is closed.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Invalid attempt to Read when reader is closed.