ASMX 到 WCF 的转换

Question

我在 .NET Framework 3.5 中有一个 asmx 服务，现在我已将其转换为 .NET Framework 4.0。现在我想将此服务作为具有相同 ASMX 扩展名的 WCF 服务运行。我阅读了一些博客，其中包含逐步转换它们的步骤。但是，它们都指的是 .NET Framework 3.5。以下是我从网上得到的参考资料。

• http://weblogs.manas.com.ar/waj/2007/05/31/asmx-to-wcf-migration/
• http://blogs.msdn.com/b/wenlong/archive/2007/09/18/how-to-use-asmx-extension-to-handle-wcf-requests.aspx

我尝试了这些，它们在 3.5 框架下运行良好，但在 4.0 框架下运行良好。我得到了错误

无法转换类型的对象 'System.Web.Compilation.BuildResultCustomString' 输入 'System.Web.Compilation.BuildResultCompiledType'。

我在上面添加了 httpHandler 部分，但它已经消失了。但是现在我收到一个新错误

无法加载类型 'System.ServiceModel.Activation.HttpHandler' 从程序集'System.ServiceModel， 版本=4.0.0.0，文化=中性， PublicKeyToken=b77a5c561934e089'

谁能帮我解决这个错误。

Answer 1

我将它与 aspNetCompatibilityEnabled 设置为 'true' 一起使用，如下所示：

添加对以下内容的引用：

System.ServiceModel.Activation

在您的 web.config 中：

<system.web>
<compilation debug="true" targetFramework="4.0">
  <buildProviders>
    <remove extension=".asmx"/>
    <add extension=".asmx" type="System.ServiceModel.Activation.ServiceBuildProvider, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
  </buildProviders>
</compilation>
</system.web>

<system.webServer>
<handlers>
  <remove name="WebServiceHandlerFactory-Integrated"/>
  <add name="MyNewAsmxHandler" path="*.asmx" verb="*" type="System.ServiceModel.Activation.HttpHandler, System.ServiceModel.Activation, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
</handlers>
<validation validateIntegratedModeConfiguration="false" />
</system.webServer>

注意处理程序中的类型和 publickeytoken 更改！

它必须是 'System.ServiceModel.Activation' 而不是 'System.ServiceModel' 和 ' PublicKeyToken=31bf3856ad364e35' 因为微软已将它们拆分为单独的程序集

Answer 2

我认为您可能需要在 IIS 中正确注册 .NET 4 处理程序。从 .NET 4 框架目录运行 ServiceModelReg.exe -ia 看看是否有帮助。

C:\Windows\Microsoft.NET\Framework\v4.0.30319>ServiceModelReg.exe /?
Microsoft (R) WCF/WF registration tool version 4.0.0.0
Copyright (c) Microsoft Corporation.  All rights reserved.

Administration utility that manages the installation and uninstallation of
WCF and WF components on a single machine.

Usage:
    ServiceModelReg.exe [(-ia|-ua|-r)|((-i|-u) -c:<command>)] [-v|-q] [-nologo]
[-h]
  -ia
    Install all components
  -ua
    Uninstall all components
  -r
    Extended only.  Repairs all components
  -i
    Install components specified with -c
  -u
    Uninstall components specified with -c
  -c:<component>
    Install/uninstall a component:
      httpnamespace        - HTTP namespace reservation
      tcpportsharing       - TCP port sharing service
      tcpactivation        - TCP activation service (unsupported on .NET 4 Clien
t Profile)
      namedpipeactivation  - Named pipe activation service (unsupported on .NET
4 Client Profile)
      msmqactivation       - MSMQ activation service (unsupported on .NET 4 Clie
nt Profile)
      etw                  - ETW event tracing manifests (Windows Vista or later
)
    Can be used to install several components at the same time
  -q
    Quiet mode (only error logging)
  -v
    Verbose mode
  -nologo
    Suppress the copyright and banner message
  -h
    Displays this help text.

Examples:
    ServiceModelReg.exe -ia
      Installs all components
    ServiceModelReg.exe -i -c:httpnamespace -c:etw
      Installs HTTP namespace reservation and ETW manifest
    ServiceModelReg.exe -u -c:etw
      Uninstalls ETW manifests
    ServiceModelReg.exe -r
      Repairs an extended install