导出 Gridview数据到 Excel

protected void imgExport_Click(object sender, EventArgs e)
{
if (this.GridView1.PageCount == 0)
{
Page.RegisterStartupScript(DateTime.Now.ToString(), "<script>alert('没有数据！')</script>");
}
else
{
Response.Clear();
//设定编码格式
Response.Charset = "UTF-8";
//设定文件名
Response.AddHeader("content-disposition", "attachment;filename=Neware Ip.xls");
//设定类型
Response.ContentType = "application/vnd.xls";
//创建写入器
StringWriter sw = new StringWriter();
//创建写入流
HtmlTextWriter htw = new HtmlTextWriter(sw);
//写入数据
GridView1.RenderControl(htw);
Response.Write(sw.ToString());
//关闭请求
Response.End();
}
}