程序运行到"GridView1.RenderControl(hw); "抛出异常:Control 'ctl00_contentPlaceHolder1_GridView1' of type 'GridView' must be placed inside a form tag with runat=server.
Response.Clear();
Response.Buffer = false;
Response.Charset = "GB2312";
Response.AppendHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode("用户" + this.DropDownListUser.Text + "的权限") + ".xls");
Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
Response.ContentType = "application/ms-excel";
this.EnableViewState = false;
System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
this.GridView1.RenderControl(oHtmlTextWriter);
Response.Write(oStringWriter.ToString());
Response.End();
运行到this.GridView1.RenderControl(oHtmlTextWriter);时出异常。
解决方案： （从
http://blog.csdn.net/xdfwsl/archive/2006/07/26/982454.aspx转的）
1、在导出界面中重载
public override void VerifyRenderingInServerForm(Control control)
{
//base.VerifyRenderingInServerForm(control);
}
2、在web.config中修改<pages enableEventValidation ="false" ></pages>
或<%@ Page Language="C#" EnableEventValidation = "false" AutoEventWireup="true" CodeFile="ExportGridView.aspx.cs" Inherits="ExportGridView" %>
3、现在可以正常导出了