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();
}
}VB.net:(GridView直接帮定DataSource控件)
Imports Microsoft.VisualBasic
Imports System
Imports System.IO
Partial Class ManageContentsClass ManageContents
Inherits System.Web.UI.Page
Protected Sub Page_Load()Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
'If Not Me.IsPostBack Then
' If Request.QueryString("username") <> "xucanzhao" Then
' Response.Redirect("default.aspx?returnUrl=nousername")
' End If
'End If
' ClientScript.RegisterStartupScript(Me.GetType(), "haha", "<script>alert('haha');</script>")
End Sub
Protected Sub btnExportExcel_Click()Sub btnExportExcel_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnExportExcel.Click
Response.Clear()
Response.Buffer = True
Response.Charset = "utf-8"
Response.AddHeader("Content-Disposition", "attachment;filename=FileFlow.xls")
Response.ContentType = "application/ms-excel"
Dim strWriter As New StringWriter()
Dim htw As New HtmlTextWriter(strWriter)
GridView1.AllowPaging = False
GridView1.DataBind()
GridView1.RenderControl(htw)
Response.Write(strWriter.ToString)
Response.End()
GridView1.AllowPaging = True
GridView1.DataBind()
End Sub
Public Overrides Sub verifyRenderingInServerForm()Sub verifyRenderingInServerForm(ByVal control As Control)
End Sub
End Class
For more information:visti
http://geekswithblogs.net
posted on 2006-04-29 13:22
徐灿钊Asp.net专栏 阅读(6365)
评论(13) 编辑 收藏 所属分类:
.net2.0
发表评论
im having this problem. "RegisterForEventValidation can only be called during Render();"
my code is.
protected void Button1_Click(object sender, EventArgs e)
{
//Export the GridView to Excel
PrepareGridViewForExport(GridView1);
ExportGridView();
}
private void ExportGridView()
{
string attachment = "attachment; filename=Contacts.xls";
Response.ClearContent();
Response.AddHeader("content-disposition", attachment);
Response.ContentType = "application/ms-excel";
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
GridView1.RenderControl(htw);
Response.Write(sw.ToString());
Response.End();
}
public override void VerifyRenderingInServerForm(Control control)
{
}
private void PrepareGridViewForExport(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);
}
else if (gv.Controls[i].GetType() == typeof(CheckBox))
{
l.Text = (gv.Controls[i] as CheckBox).Checked ? "True" : "False";
gv.Controls.Remove(gv.Controls[i]);
gv.Controls.AddAt(i, l);
}
if (gv.Controls[i].HasControls())
{
PrepareGridViewForExport(gv.Controls[i]);
}
}
}
在Excel里没有分页? ......................
怎么导入到Excel里的只有GridView里面的第一页数据,后面的数据没有导入啊
[code]protected void Button1_Click(object sender, EventArgs e)
{
Response.Clear();
Response.Buffer = true;
Response.Charset = "GB2312";
Response.AppendHeader("Content-Disposition", "attachment;filename=FileName.xls");
// 如果设置为 GetEncoding("GB2312");导出的文件将会出现乱码！！！
Response.ContentEncoding = System.Text.Encoding.UTF7;
Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。
System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
this.GridView1.RenderControl(oHtmlTextWriter);
Response.Output.Write(oStringWriter.ToString());
Response.Flush();
Response.End();
}
public override void VerifyRenderingInServerForm(Control control)
{ }
[/code]
--引用--------------------------------------------------
huhuhuhuh: 怎么导入到Excel里的只有GridView里面的第一页数据,后面的数据没有导入啊
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