将gridview数据导入到Exccl里

 ///

///这是导入方法

///

private void ExportExcelFromDataGrid(string filename, System.Web.UI.WebControls.GridView ToExcelGrid)
    {
        Response.Clear();
        Response.Buffer = true;
        Response.Charset = "utf-8";
        Response.AppendHeader("Content-Disposition", "attachment;filename=" + Server.UrlEncode(filename));
        Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");//设置输出流为简体中文  
        Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。   

        this.EnableViewState = false;
        System.Globalization.CultureInfo myCItrad = new System.Globalization.CultureInfo("ZH-CN", true);
        System.IO.StringWriter oStringWriter = new System.IO.StringWriter(myCItrad);
        System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
        ToExcelGrid.RenderControl(oHtmlTextWriter);
        Response.Write(oStringWriter.ToString());
        Response.End();
    }

///只有重写这个方法。。才不会报Gridview 必须放在runat=server的控件里

    public override void VerifyRenderingInServerForm(Control control)
    {
        // Confirms that an HtmlForm control is rendered for
       //里边不写任何的东西
    }

   /// <summary>
   /// 到入按钮2
   /// </summary>
   /// <param name="sender"></param>
   /// <param name="e"></param>
    protected void btn_Click(object sender, EventArgs e)
    {
        ExportExcelFromDataGrid("TestExcel.xls", this.GridView1);

    }