在ASP.NET中GridView导出Excel的快速方法

此方法最有效，所以贴出来与大家分享

protected void btnOutExcel_Click(object sender, EventArgs e)
{
if (GridView1.Rows.Count > 0)
{
//调用导出方法
ExportGridViewForUTF8(GridView1, DateTime.Now.ToShortDateString() + ".xls");
}
else
{
obo.Common.MessageBox.Show(this, "没有数据可导出，请先查询数据!");
}
}

/// <summary>
/// 重载，否则出现“类型“GridView”的控件“GridView1”必须放在具有 runat=server 的窗体标... ”的错误
/// </summary>
/// <param name="control"></param>
public override void VerifyRenderingInServerForm(Control control)
{
//base.VerifyRenderingInServerForm(control);
}

/// <summary>
/// 导出方法
/// </summary>
/// <param name="GridView"></param>
/// <param name="filename">保存的文件名称</param>
private void ExportGridViewForUTF8(GridView GridView, string filename)
{

string attachment = "attachment; filename=" + filename;

Response.ClearContent();
Response.Buffer = true;
Response.AddHeader("content-disposition", attachment);

Response.Charset = "UTF-8";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
Response.ContentType = "application/ms-excel";
System.IO.StringWriter sw = new System.IO.StringWriter();

HtmlTextWriter htw = new HtmlTextWriter(sw);
GridView.RenderControl(htw);

Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();

}

若出现“只能在执行 Render() 的过程中调用 RegisterForEventValidation”的错误提示。

有两种方法可以解决以上问题：

1.修改web.config(不推荐)<pages enableEventValidation ="false" ></pages>

2.直接在导出Execl的页面修改

<%@ Page Language="C#"
EnableEventValidation =
"false" AutoEventWireup="true"
CodeFile="ExportGridView.aspx.cs" Inherits="ExportGridView"
%>