GRIDVIEW转EXCEL提示错误( 'GridView' must be placed inside a form tag with runat=server.)

很久之前遇到的问题,现在放到这里记录一下

Control 'ctl00_ContentPlaceHolder1_GridView1' of type 'GridView' must be placed inside a form tag with runat=server.

重写VerifyRenderingInServerForm

    public override void VerifyRenderingInServerForm(Control control)

    {

        //base.VerifyRenderingInServerForm(control);

    }