一个好用的GridView导出Excel

增加一个class

 

using  System;
using  System.Data;
using  System.Configuration;
using  System.IO;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;

///   <summary>
///  
///   </summary>
public   class  GridViewExportUtil
{
     ///   <summary>
     ///  
     ///   </summary>
     ///   <param name="fileName"></param>
     ///   <param name="gv"></param>
     public   static   void  Export( string  fileName, GridView gv)
    {
        HttpContext.Current.Response.Clear();
        HttpContext.Current.Response.AddHeader(
             " content-disposition " ,  string .Format( " attachment; filename={0} " , fileName));
        HttpContext.Current.Response.ContentType  =   " application/ms-excel " ;

         using  (StringWriter sw  =   new  StringWriter())
        {
             using  (HtmlTextWriter htw  =   new  HtmlTextWriter(sw))
            {
                 //   Create a form to contain the grid
                Table table  =   new  Table();

                 //   add the header row to the table
                 if  (gv.HeaderRow  !=   null )
                {
                    GridViewExportUtil.PrepareControlForExport(gv.HeaderRow);
                    table.Rows.Add(gv.HeaderRow);
                }

                 //   add each of the data rows to the table
                 foreach  (GridViewRow row  in  gv.Rows)
                {
                    GridViewExportUtil.PrepareControlForExport(row);
                    table.Rows.Add(row);
                }

                 //   add the footer row to the table
                 if  (gv.FooterRow  !=   null )
                {
                    GridViewExportUtil.PrepareControlForExport(gv.FooterRow);
                    table.Rows.Add(gv.FooterRow);
                }

                 //   render the table into the htmlwriter
                table.RenderControl(htw);

                 //   render the htmlwriter into the response
                HttpContext.Current.Response.Write(sw.ToString());
                HttpContext.Current.Response.End();
            }
        }
    }

     ///   <summary>
     ///  Replace any of the contained controls with literals
     ///   </summary>
     ///   <param name="control"></param>
     private   static   void  PrepareControlForExport(Control control)
    {
         for  ( int  i  =   0 ; i  <  control.Controls.Count; i ++ )
        {
            Control current  =  control.Controls[i];
             if  (current  is  LinkButton)
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i,  new  LiteralControl((current  as  LinkButton).Text));
            }
             else   if  (current  is  ImageButton)
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i,  new  LiteralControl((current  as  ImageButton).AlternateText));
            }
             else   if  (current  is  HyperLink)
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i,  new  LiteralControl((current  as  HyperLink).Text));
            }
             else   if  (current  is  DropDownList)
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i,  new  LiteralControl((current  as  DropDownList).SelectedItem.Text));
            }
             else   if  (current  is  CheckBox)
            {
                control.Controls.Remove(current);
                control.Controls.AddAt(i,  new  LiteralControl((current  as  CheckBox).Checked  ?   " True "  :  " False " ));
            }

             if  (current.HasControls())
            {
                GridViewExportUtil.PrepareControlForExport(current);
            }
        }
    }
}

 

使用方法：

 

     ///   <summary>
     ///  
     ///   </summary>
     ///   <param name="sender"></param>
     ///   <param name="args"></param>
     protected   void  BtnExportGrid_Click( object  sender, EventArgs args)
    {
         //   pass the grid that for exporting 
        GridViewExportUtil.Export( " Customers.xls " ,  this .gvCustomers);
    }