gridview数据导出到excel打印

    //打印gridview中的数据时需要override掉这个方法,实现部分为空
    public override void VerifyRenderingInServerForm(Control control)
    {
        //注释掉下面的代码，否则在asp.net2.0下会报错（注：GridView是asp.net 2.0下的控件，1.1下一些控件也可以导出成Excel或者Word）
        //base.VerifyRenderingInServerForm(control);
    }
    /// <summary>
    /// 打印功能
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnPrint_Click(object sender, EventArgs e)
    {
        if (gvResult.Rows.Count > 0)//有数据时才导出到Excel
        {
            #region GridView中的内容导出到Excel里,需要判断是否已安装office
            try
            {
                Response.Clear();
                Response.BufferOutput = true;
                //设定输出的字符集
                Response.Charset = "GB2312";
                //假定导出的文件名为excel.xls
                Response.AppendHeader("Content-Disposition", "attachment;filename=excel.xls");
                Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
                //设置导出文件的格式
                Response.ContentType = "application/ms-excel";
                //关闭ViewState
                EnableViewState = false;
                System.Globalization.CultureInfo cultureInfo = new System.Globalization.CultureInfo("ZH-CN", true);
                System.IO.StringWriter stringWriter = new System.IO.StringWriter(cultureInfo);
                System.Web.UI.HtmlTextWriter textWriter = new System.Web.UI.HtmlTextWriter(stringWriter);
                gvResult.RenderControl(textWriter);
                //把HTML写回浏览器
                Response.Write(stringWriter.ToString());
                Response.End();
            }
            catch (Exception ex)
            {
                JScript.ShowMessage(ex.Message);
            }
            #endregion
        }
        else
        {
            JScript.ShowMessage("无数据可以打印.");
        }
    }