當(dāng)用GridView導(dǎo)出Execl的時(shí)候，會(huì)發(fā)生只能在執(zhí)行 Render() 的過程中調(diào)用 RegisterForEventValidation的錯(cuò)誤提示。
有兩種方法可以解決以上問題：
1.修改web.config(不推薦)<pages enableEventValidation ="false" ></pages>
2.直接在導(dǎo)出Execl的頁(yè)面修改
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直接幫定DataSource控件)
Imports Microsoft.VisualBasic
Imports System
Imports System.IO
Partial Class ManageContents
Inherits System.Web.UI.Page
Protected 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(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(ByVal control As Control)
End Sub
End Class
有兩種方法可以解決以上問題：
1.修改web.config(不推薦)<pages enableEventValidation ="false" ></pages>
2.直接在導(dǎo)出Execl的頁(yè)面修改
<%@ Page Language="C#" EnableEventValidation = "false" AutoEventWireup="true"
CodeFile="ExportGridView.aspx.cs" Inherits="ExportGridView" %>
附：Gridview導(dǎo)出Execl可分頁(yè)全部導(dǎo)出代碼(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(); }}Imports Microsoft.VisualBasicImports SystemImports System.IOPartial Class ManageContents Inherits System.Web.UI.Page Protected 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(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(ByVal control As Control) End SubEnd Class
