我们有4个人为我们的最终学校项目建立了一个网站。我们需要允许用户上传pdf。我们正在使用Visual Studio 2012，我们设置了主页面，整个登录过程和用户创建都有效。我们正在使用jQuery和jQueryMobile，因为该网站也需要适用于手机，这使它更容易。
但是当我们想检查客户端试图在我们的代码中上传的文件时，Request.Files总是为空。这是为什么？
我按照我正在使用的形式设置了enctype，所以我应该没事。单击上传按钮时，页面会重新加载，文件输入中的文本字段将被清除。然后，它运行代码隐藏方法。
我们获得的输出是：
HALLOOOOOOOOOOOOOO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
In the house
Files[] size is 0
主页面如下：
<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Main.Master.cs" Inherits="SendEtBrev.Main" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>SendEtBrev.dk</title>
<meta http-equiv="Pragma" content="no-cache" />
<meta http-equiv="Expires" content="-1" />
<meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=no;" />
<meta name="MobileOptimized" content="width" />
<meta name="HandheldFriendly" content="true" />
<link rel="stylesheet" type="text/css" href="/Styles/reset.css" />
<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="/Js/fixes.js"></script>
<script src="http://code.jquery.com/mobile/1.3.1/jquery.mobile-1.3.1.min.js"></script>
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.3.1/jquery.mobile-1.3.1.min.css" />
<link rel="stylesheet" type="text/css" href="/Styles/sendetbrev.css" />
<asp:ContentPlaceHolder ID="head" runat="server" />
</head>
<body>
<header>
<div class="headerbox">
<div class="headerlogo">
<img class="autosizedimage" src="/Billeder/Logo.png" />
</div>
<asp:LoginView ID="LoginViewMenu" runat="server">
<LoggedInTemplate>
<a href="/Account/Minkonto.aspx">Min konto</a>
<a href="/Account/Logout.aspx">Log ud</a>
</LoggedInTemplate>
</asp:LoginView>
<br />
</div>
</header>
<br />
<br />
<div>
<asp:ContentPlaceHolder ID="centercontent" runat="server" />
</div>
<footer>
</footer>
</body>
</html>
我的ASPX代码是这样的：
<%@ Page Language="C#" MasterPageFile="~/Main.Master" ValidateRequest = "False" AutoEventWireup="true" CodeBehind="Side1Uploadfil.aspx.cs" Inherits="SendEtBrev.SendBrev.Side1Uploadfil" %>
<asp:Content ID="Content1" ContentPlaceHolderID="centercontent" runat="server" >
<asp:Literal ID="introText" runat="server"/>
<br />
<br />
<asp:Literal ID="AccepteredeFormater" runat="server" />
<br />
.pdf<br />
<!-- vises kun hvis der er en fejlbesked ved upload -->
<asp:Literal ID="errorMessage" runat="server" EnableViewState="false" /><br />
Select a file to upload:
<form id="form1" name="form1" method="post" runat="server" enctype="multipart/form-data" >
<input type="file" accept="*.pdf" id="fileUploadControl" name="fileUploadControl" runat="server" />
<asp:Button runat="server" ID="btnUpload" OnClick="btnUploadClick" Text="Upload" />
<br/><br/>
<br />
</form>
<asp:Button ID="FortsaetKnap" runat="server" data-role="none" CssClass="knap1" Visible="False"
OnClientClick="javascript:location.replace('/SendBrev/Side2Modtager.aspx');" /><br />
</asp:Content>
我的代码背后是：
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Web;
using System.Web.Script.Services;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using iTextSharp.text.pdf;
using iTextSharp.text.xml;
using System.Text.RegularExpressions;
using System.Web.UI.WebControls;
using System.IO;
namespace SendEtBrev.SendBrev
{
public partial class Side1Uploadfil : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
introText.Text = "Du er nu klar til at sende et brev.";
AccepteredeFormater.Text = "Følgende filformater accepteres:";
FortsaetKnap.Text = "Fortsæt";
btnUpload.Text = "Upload";
}
protected void btnUploadClick(object sender, EventArgs e)
{
Response.Write("HALLOOOOOOOOOOOOOO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
Console.WriteLine("HALLOOOOOOOOOOOOOO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
Debug.WriteLine("HALLOOOOOOOOOOOOOO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
if (fileUploadControl != null)
{
Response.Write("In the house");
Console.WriteLine("In the house");
Debug.WriteLine("In the house");
}
if (Page.Request.Files.Count > 0)
{
{
//Get the first file. There could be multiple if muti upload is supported
string fileName = Page.Request.Files[0].FileName;
//Some validation
if (Page.Request.Files[0].ContentLength > 1 && !string.IsNullOrEmpty(fileName))
{
FileValidator(Page.Request.Files[0].InputStream);
}
}
}
else
{
Debug.WriteLine("Files[] size is 0");
Console.WriteLine("Files[] size is 0");
Response.Write("Files[] size is 0");
}
}
protected void FileValidator(Stream myFileStream)
{
Debug.WriteLine("Running FileValidator...");
Console.WriteLine("Running FileValidator...");
Response.Write("Running FileValidator...");
if (myFileStream != null)
{
using (StreamReader sr = new StreamReader(myFileStream))
{
Regex regex = new Regex(@"/Type\s*/Page[^s]");
MatchCollection matches = regex.Matches(sr.ReadToEnd());
Console.Write("PDF'en har " + matches.Count + " sider");
Debug.Write("PDF'en har " + matches.Count + " sider");
Response.Write("PDF'en har " + matches.Count + " sider");
if (matches.Count > 0)
{
FortsaetKnap.Visible = true;
}
}
}
else
{
Debug.WriteLine("Filestream is null");
Console.WriteLine("Filesream is null");
Response.Write("Filestream is null");
FortsaetKnap.Visible = false;
}
}
}
}
答案 0 :(得分：16)
这是因为jQueryMobile默认使用ajax。在这种情况下，文件上传不起作用。
因此，向表单添加data-ajax="false"应修复它。
<form id="form1" name="form1" data-ajax="false" method="post" runat="server"
enctype="multipart/form-data" >
一些有用的链接：