Asp.net
Asp.Net Ajax Toolkit AsyncFileUpload - “附加的文件無效”錯誤
我正在嘗試使用 Asp.net Ajax Control Toolkit (Sept 30, 2009 stable build: 30930) 中的 AsyncFileUpload 控制項。我創建了一個展示應用程序，並且控制項工作正常。文件上傳，一切正常。
當我嘗試在我的實際應用程序中使用該控制項時，我總是收到一條錯誤消息，指出“附加的文件無效”。當上傳的文件為空時，AsyncFileUpload 控制項返回此值。
為了隔離問題，我創建了一個與展示應用程序中的母版頁完全相同的新母版頁。我還創建了一個與我的展示應用程序中的頁面完全相同的 aspx 頁面。上傳仍然失敗，並出現“附加的文件無效”錯誤。
我還比較了真實應用程序和展示應用程序的 web.config，無法確定任何重要的差異。
下面的程式碼是我真實應用中的測試程式碼。此程式碼與展示應用程序中的功能程式碼完全相同，只是具有不同的類名和文件名。下面列出的 web.config 來自刪除了 appsettings 和 connectionstrings 的真實應用程序。
在這一點上，我完全被難住了。
真實應用測試母版頁：
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="aaaMasterPage.master.cs" Inherits="L1Admin.aaaMasterPage" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>Untitled Page</title> <script type="text/javascript" src="js/jquery-1.3.2.min.js"></script> <asp:ContentPlaceHolder id="head" runat="server"> </asp:ContentPlaceHolder> </head> <body> <form id="form1" runat="server"> <asp:ScriptManager ID="scriptManager" EnablePartialRendering="true" runat="server" AsyncPostBackTimeout="180" /> <div> <asp:ContentPlaceHolder id="content" runat="server"> </asp:ContentPlaceHolder> </div> </form> </body> </html>測試頁面：
<%@ Page Language="C#" MasterPageFile="~/aaaMasterPage.master" AutoEventWireup="true" CodeFile="aaaFileUploadTest2.aspx.cs" Inherits="aaaFileUploadTest2" Title="Untitled Page" %> <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajax" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server"> <script type="text/javascript"> function pageLoad(sender, args) { } function startUpload(sender,args) { $('#uploadMessage p').html(); $('#uploadMessage').hide(); } function uploadComplete(sender,args) { showUploadMessage(args.get_fileName() + " uploaded succesfully - " + + args.get_length() + " bytes", ''); } function uploadError(sender, args) { showUploadMessage("An error occurred during uploading. " + args.get_errorMessage(), '#ff0000'); } function showUploadMessage(text, color) { $('#uploadMessage p').html(text).css('color', color); $('#uploadMessage').show(); } </script> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="content" Runat="Server"> <div id="uploadMessage"><p></p></div> <ajax:AsyncFileUpload ID="pageBannerUpload" CssClass="file_upload" OnClientUploadError="uploadError" OnClientUploadStarted="startUpload" OnClientUploadComplete="uploadComplete" onuploadedcomplete="upload_UploadedComplete" runat="server" /> </asp:Content>真實應用測試頁面程式碼背後：
using System; using System.IO; using System.Collections; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; public partial class aaaFileUploadTest2 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void upload_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e) { if (pageBannerUpload.HasFile) { string path = MapPath("~/") + Path.GetFileName(e.filename); pageBannerUpload.SaveAs(path); } } }真實應用測試 Web.config：
<?xml version="1.0"?> <!-- Note: As an alternative to hand editing this file you can use the web admin tool to configure settings for your application. Use the Website->Asp.Net Configuration option in Visual Studio. A full list of settings and comments can be found in machine.config.comments usually located in \Windows\Microsoft.Net\Framework\v2.x\Config --> <configuration> <configSections> <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/> <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"> <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere"/> <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/> <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/> <section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/> </sectionGroup> </sectionGroup> </sectionGroup> </configSections> <appSettings> </appSettings> <connectionStrings> </connectionStrings> <system.web> <!-- Set compilation debug="true" to insert debugging symbols into the compiled page. Because this affects performance, set this value to true only during development. --> <compilation debug="true"> <assemblies> <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> <add assembly="System.Transactions, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> <add assembly="System.Data.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> </assemblies> <codeSubDirectories> <add directoryName="CSCode"/> <add directoryName="VBCode"/> </codeSubDirectories> </compilation> <!-- The <authentication> section enables configuration of the security authentication mode used by ASP.NET to identify an incoming user. --> <authentication mode="Windows"/> <!-- The <customErrors> section enables configuration of what to do if/when an unhandled error occurs during the execution of a request. Specifically, it enables developers to configure html error pages to be displayed in place of a error stack trace. <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm"> <error statusCode="403" redirect="NoAccess.htm" /> <error statusCode="404" redirect="FileNotFound.htm" /> </customErrors> --> <pages> <controls> <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add tagPrefix="Annsa" namespace="Annsa.Controls" assembly="Annsa.Controls"/> </controls> <namespaces> <add namespace="Microsoft.VisualBasic"/> <add namespace="System.Data"/> <add namespace="System.Drawing"/> </namespaces> </pages> <httpHandlers> <remove verb="*" path="*.asmx"/> <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add verb="GET,HEAD" path="ScriptResource.axd" validate="false" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </httpHandlers> <httpModules> <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </httpModules> <identity impersonate="true"/> <trace enabled="false" requestLimit="10" pageOutput="false" traceMode="SortByTime" localOnly="true"/> <!-- SESSION STATE SETTINGS mode="Off|InProc|StateServer|SqlServer" By default ASP.NET uses cookies to identify which requests belong to a particular session. If cookies are not available, a session can be tracked by adding a session identifier to the URL. To disable cookies, set sessionState cookieless="true". --> <sessionState mode="InProc" stateConnectionString="tcpip=127.0.0.1:42424" sqlConnectionString="data source=127.0.0.1;user id=sa;password=" cookieless="false" timeout="20"/> <!-- GLOBALIZATION This section sets the globalization settings of the application. --> <xhtmlConformance mode="Legacy"/> </system.web> <location path="Pages"> <system.web> <xhtmlConformance mode="Transitional"></xhtmlConformance> </system.web> </location> <system.codedom> <compilers> <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CSharp.CSharpCodeProvider,System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" warningLevel="4"> <providerOption name="CompilerVersion" value="v3.5"/> <providerOption name="WarnAsError" value="false"/> </compiler> <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.VisualBasic.VBCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" warningLevel="4"> <providerOption name="CompilerVersion" value="v3.5"/> <providerOption name="OptionInfer" value="true"/> <providerOption name="WarnAsError" value="false"/> </compiler> </compilers> </system.codedom> <system.webServer> <validation validateIntegratedModeConfiguration="false"/> <modules> <remove name="ScriptModule"/> <add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </modules> <handlers> <remove name="WebServiceHandlerFactory-Integrated"/> <remove name="ScriptHandlerFactory"/> <remove name="ScriptHandlerFactoryAppServices"/> <remove name="ScriptResource"/> <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add name="ScriptResource" verb="GET,HEAD" path="ScriptResource.axd" preCondition="integratedMode" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </handlers> </system.webServer> <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/> <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/> <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/> </dependentAssembly> </assemblyBinding> </runtime> </configuration>編輯：我不再為這家公司工作，所以我無法測試任何新答案以查看它們是否解決了問題。
我在 .NET 4 中遇到了同樣的問題。我通過在控制項上設置 ClientIDMode=“AutoID” 來解決它。
如果您已遷移 webproject，則 user423430 的解決方案是正確的：當您將 VS 2003 Web Project 自動遷移到 VS 2005 時，Web.config 會自動修改。
<xhtmlConformance mode="Legacy" />被添加在其中。建議不要將它與 ajax 一起使用：（ASP.NET 1.0 和 1.1 沒有從它的許多伺服器控制項發出 XHTML 兼容標記。ASP.NET 2.0 改變了這一點，預設情況下從所有控制項發出 XHTML 兼容標記。）