GridView 导出Excel

//此方法不可少 

public override void VerifyRenderingInServerForm(Control control)

    {

        //base.VerifyRenderingInServerForm(control);

    }

    protected void btnExpExcel_Click(object sender, EventArgs e)

    {

        this.Response.Clear();

        this.Response.AppendHeader("Content-Disposition", "attachment; filename=" + DateTime.Now.ToString("yyyyMMddhhmmss") + "FileName.xls");

        this.Response.Charset = "UTF8";  //输出的字符集

        this.Response.ContentEncoding = System.Text.Encoding.UTF8;  //编码类型

        Response.ContentType = "application/vnd.ms-excel";   //输出Excel   

        System.IO.StringWriter tw = new System.IO.StringWriter();

        HtmlTextWriter hw = new HtmlTextWriter(tw);

        this.gvData.RenderControl(hw);

        this.Response.Write(tw.ToString());

        this.Response.End();

    }