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当用GridView导出Execl的时候，会发生只能在执行 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" %>
附：Gridview导出Execl可分页全部导出代码(C#)

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.IO;

public partial class EXportTest : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
            BindData(); 
        }

    }

private string ConnectionString
{

get { return @"Server=localhost;Database=Northwind;
        Trusted_Connection=true"; }

    }



private void BindData()
{
// make the query 
string query = "SELECT * FROM Categories";
        SqlConnection myConnection = new SqlConnection(ConnectionString);
        SqlDataAdapter ad = new SqlDataAdapter(query, myConnection);
        DataSet ds = new DataSet();
        ad.Fill(ds, "Categories");
        GridView1.DataSource = ds;
        GridView1.DataBind(); 

/* It's a good idea if you can Cache the DataSet */

    }

public override void VerifyRenderingInServerForm(Control control)
{

// Confirms that an HtmlForm control is rendered for
        the specified ASP.NET server control at run time.

    }

protected void Button1_Click(object sender, EventArgs e)
{
        Response.Clear();

        Response.AddHeader("content-disposition",
"attachment;filename=FileName.xls");

        Response.Charset = "";

// If you want the option to open the Excel file without saving than

// comment out the line below

// Response.Cache.SetCacheability(HttpCacheability.NoCache);

        Response.ContentType = "application/vnd.xls";

        System.IO.StringWriter stringWrite = new System.IO.StringWriter();

        System.Web.UI.HtmlTextWriter htmlWrite =
new HtmlTextWriter(stringWrite);

// turn off paging 
        GridView1.AllowPaging = false;
        BindData(); 


        GridView1.RenderControl(htmlWrite);

        Response.Write(stringWrite.ToString());

        Response.End();

// turn the paging on again 
        GridView1.AllowPaging = true;
        BindData();

    }

protected void GridView1_PageIndexChanging(object sender,
    GridViewPageEventArgs e)
{
        GridView1.PageIndex = e.NewPageIndex;
        BindData(); 
    }
}

转载于:https://my.oschina.net/wzzz/blog/186053