DataGrid导入Excel

  参数为DataGrid的ID

public void ToExcel(System.Web.UI.Control ctl)  
        {
            HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename=Excel.xls");
            HttpContext.Current.Response.Charset ="UTF-8";    
            HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default;
            HttpContext.Current.Response.ContentType ="application/ms-excel";//image/JPEG;text/HTML;image/GIF;vnd.ms-excel/msword
            ctl.Page.EnableViewState =false;   
            System.IO.StringWriter  tw = new System.IO.StringWriter() ;
            System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw);
            ctl.RenderControl(hw);
            HttpContext.Current.Response.Write(tw.ToString());
            HttpContext.Current.Response.End();
        }

---以上适合"自动生成列"的DataGrid. ()
对于DataGrid的模板列,除了上面代码外,还要加些东西.
完整代码:

private static void ClearControls(Control control)
        {
            
            for (int i=control.Controls.Count -1; i>=0; i--)
            {
                ClearControls(control.Controls[i]);
            }

            if (!(control is TableCell))
            {
                if (control.GetType().GetProperty("SelectedItem") != null)
                {
                    LiteralControl literal = new LiteralControl();
                    control.Parent.Controls.Add(literal);
                    try
                    {
                        literal.Text = (string)control.GetType().GetProperty("SelectedItem").GetValue(control,null);
                    }
                    catch
                    {
                    }
                    control.Parent.Controls.Remove(control);
                }
                else
                    if (control.GetType().GetProperty("Text") != null)
                {
                    LiteralControl literal = new LiteralControl();
                    control.Parent.Controls.Add(literal);
                    literal.Text = (string)control.GetType().GetProperty("Text").GetValue(control,null);
                    control.Parent.Controls.Remove(control);
                }
            }
            return;
        }
    

public  static  void OutPutExcel(DataGrid dgrd, string v_FileName)
        {
            try
            {
                HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename="+v_FileName+".xls");
                HttpContext.Current.Response.Charset ="gb2312";    
                HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default;
                HttpContext.Current.Response.ContentType ="application/ms-excel";//image/JPEG;text/HTML;image/GIF;vnd.ms-excel/msword
                dgrd.Page.EnableViewState =false; 
                System.IO.StringWriter  tw = new System.IO.StringWriter();
                System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw);
                ClearControls(dgrd);
                dgrd.RenderControl(hw);
                HttpContext.Current.Response.Write(tw.ToString());
                HttpContext.Current.Response.End();
            }
            catch(Exception e)
            {
                throw e;
            }
        }