DateGrid转到Excel

    public class ConvertExcel
    {
        
        public void GridToExcel(System.Web.UI.Control ctl,bool clearControls)
        {
            HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename=Excel.xls"); 
            HttpContext.Current.Response.Charset ="UTF-8";   
            HttpContext.Current.Response.Buffer=true;
            HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default; 
            HttpContext.Current.Response.ContentType ="application/ms-excel";
            ctl.Page.EnableViewState =false;    
            System.IO.StringWriter  tw = new System.IO.StringWriter() ; 
            System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw); 
            if(clearControls == true)
            {
                ClearControls(ctl);
            }
            ctl.RenderControl(hw); 
            HttpContext.Current.Response.Write(tw.ToString()); 
            HttpContext.Current.Response.End(); 



        }
        
        
        private 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;
        }

    }

clearControl 实现:转换Datagrid中的模板到Literal