GridView导出Excel

今天在项目中要把GridView导出到Excel中，在网上找一下资料

button事件中的代码 
DisableControls(GridView1);
 Response.ClearContent();
        Response.AddHeader("content-disposition", "attachment; filename=print.xls");
        Response.ContentType = "application/ms-excel";
        StringWriter sw = new StringWriter();
        HtmlTextWriter htw = new HtmlTextWriter(sw);
        GridView1.RenderControl(htw);
        Response.Write(sw.ToString());
        Response.End();

并且还需要override一下VerifyRenderingInServerForm方法

public override void VerifyRenderingInServerForm(Control control)
{
}

在aspx文件中的配置 EnableEventValidation = "false". 


解决drownlist或LinkButton的问题

private void DisableControls(Control gv)
{
    LinkButton lb = new LinkButton();
    Literal l = new Literal();
    string name = String.Empty;

    for (int i = 0; i < gv.Controls.Count; i++)
    {
        if (gv.Controls[i].GetType() == typeof(LinkButton))
        {
            l.Text = (gv.Controls[i] as LinkButton).Text;
            gv.Controls.Remove(gv.Controls[i]);
            gv.Controls.AddAt(i, l);
        }
        else if (gv.Controls[i].GetType() == typeof(DropDownList))
        {
            l.Text = (gv.Controls[i] as DropDownList).SelectedItem.Text;
            gv.Controls.Remove(gv.Controls[i]);
            gv.Controls.AddAt(i, l);
        }

        if (gv.Controls[i].HasControls())
        {
            DisableControls(gv.Controls[i]);
        }
    }
}