我的VS 2008解决方案中的项目每次都需要重新构建

Question

我在VS 2008中有一个C#项目，每次构建解决方案时都会重新构建，即使该项目及其依赖项都没有更改。这是一个很大的问题，因为解决方案非常庞大（>100个项目），而该项目在依赖链中非常低，因此现在导致大部分其他项目也需要重新构建，尽管不应该进行任何重建。（我正在执行“构建解决方案”，而不是“重新构建解决方案”）。

我知道这个项目是罪魁祸首，因为我将“MSBuild项目构建输出详细程度”设置为“诊断”。然后，在两次构建之间没有更改任何内容的情况下，我连续构建了两次解决方案。第二次构建时，这是解决方案中第一个被重新构建的项目，通过注意到Csc.exe正在执行来确定。

以下是构建输出中所见到的内容：

------ Build started: Project: COS.BusinessEntities, Configuration: Debug Any CPU ------

...

Target "CoreCompile" in file "c:\WINDOWS\Microsoft.NET\Framework\v3.5\Microsoft.CSharp.targets":
 Building target "CoreCompile" completely.
 Output file "bin\Debug\COS.BusinessEntities.XML" does not exist.
 Task "Csc"
  Command:
  c:\WINDOWS\Microsoft.NET\Framework\v3.5\Csc.exe /noconfig /nowarn:1591,1573,0219,0168,1572,1587,1570,1701,1702 /errorreport:prompt /warn:4 /doc:bin\Debug\COS.BusinessEntities.XML /define:DEBUG;TRACE ...

因此，当它到达COS.BusinessEntities项目时，它找不到“bin\Debug\COS.BusinessEntities.XML”文件。但我已经验证，在第一次构建之后确实存在该文件，并且我不认为它被删除并重新创建（但是可以考虑如何验证此问题的建议）。我尝试在进行第二次构建时观察文件夹，但我从未看到它消失。

另一个线索是，这种行为始于特定的检入，其中开发人员向项目添加了两个文件：OptionsEntities.edmx文件和OptionsEntities.Designer.cs。以下内容还添加到了COS.BusinessEntities.prj文件：

  <Compile Include="Options\Entities\OptionsEntities.Designer.cs">
   <AutoGen>True</AutoGen>
   <DesignTime>True</DesignTime>
   <DependentUpon>OptionsEntities.edmx</DependentUpon>
  </Compile>

  ...

  <EntityDeploy Include="Options\Entities\OptionsEntities.edmx">
   <Generator>EntityModelCodeGenerator</Generator>
   <LastGenOutput>OptionsEntities.Designer.cs</LastGenOutput>
  </EntityDeploy>

显然，这些条目对于edmx文件是必要的，但我想知道是否有一些值是不正确的，导致了这种行为。我确定这就是罪魁祸首，因为如果我获取之前的更改集，这个问题就消失了；在没有代码更改的情况下构建解决方案时，项目不会重新构建自身。

任何帮助都将不胜感激！我已经苦思冥想几天了！

谢谢，

克里斯

编辑： 从项目中删除XML文档XML文件后，我仍然遇到同样的问题，但以下是新的输出：

Target "CoreCompile" in file "c:\WINDOWS\Microsoft.NET\Framework\v3.5\Microsoft.CSharp.targets":
  Building target "CoreCompile" completely.
  Input file "C:\Documents and Settings\<my username>\Local Settings\Temp\tmp6D36.tmp" is newer than output file "obj\Debug\COS.BusinessEntities.pdb".
  Task "Csc"
    Command:
    c:\WINDOWS\Microsoft.NET\Framework\v3.5\Csc.exe /noconfig /nowarn:1591,1573,0219,0168,1572,1587,1570,1701,1702 /errorreport:prompt /warn:4 /define:DEBUG;TRACE ...

...而且那个临时文件每次都不同！哎呀！现在该尝试什么？

编辑2： 以下是与此临时文件相关的构建输出相关部分（这些从BusinessEntities项目开始）：

Target "SplitResourcesByCulture" in file "c:\WINDOWS\Microsoft.NET\Framework\v3.5\Microsoft.Common.targets":
  Task "Warning" skipped, due to false condition; ('@(ResxWithNoCulture)'!='') was evaluated as (''!='').
  Task "Warning" skipped, due to false condition; ('@(ResxWithCulture)'!='') was evaluated as (''!='').
  Task "Warning" skipped, due to false condition; ('@(NonResxWithCulture)'!='') was evaluated as (''!='').
  Task "Warning" skipped, due to false condition; ('@(NonResxWithNoCulture)'!='') was evaluated as (''!='').
  Task "AssignCulture"
    Culture of "" was assigned to file "C:\Documents and Settings\<my username>\Local Settings\Temp\tmp6D36.tmp".
    Culture of "" was assigned to file "C:\Documents and Settings\<my username>\Local Settings\Temp\tmp6D38.tmp".
    Culture of "" was assigned to file "C:\Documents and Settings\<my username>\Local Settings\Temp\tmp6D37.tmp".
  Done executing task "AssignCulture".
Done building target "SplitResourcesByCulture" in project "COS.BusinessEntities.csproj".
Target "CreateManifestResourceNames" in file "c:\WINDOWS\Microsoft.NET\Framework\v3.5\Microsoft.CSharp.targets":
  Task "CreateCSharpManifestResourceName"
    Root namespace is 'COS.BusinessEntities'.
    Resource file 'C:\Documents and Settings\<my username>\Local Settings\Temp\tmp6D36.tmp' doesn't depend on any other file.
    Resource file 'C:\Documents and Settings\<my username>\Local Settings\Temp\tmp6D36.tmp' gets manifest resource name 'COS.BusinessEntities.tmp6D36.tmp'.
    Resource file 'C:\Documents and Settings\<my username>\Local Settings\Temp\tmp6D38.tmp' doesn't depend on any other file.
    Resource file 'C:\Documents and Settings\<my username>\Local Settings\Temp\tmp6D38.tmp' gets manifest resource name 'COS.BusinessEntities.tmp6D38.tmp'.
    Resource file 'C:\Documents and Settings\<my username>\Local Settings\Temp\tmp6D37.tmp' doesn't depend on any other file.
    Resource file 'C:\Documents and Settings\<my username>\Local Settings\Temp\tmp6D37.tmp' gets manifest resource name 'COS.BusinessEntities.tmp6D37.tmp'.
  Done executing task "CreateCSharpManifestResourceName".
  Task "CreateCSharpManifestResourceName" skipped, due to false condition; ('%(EmbeddedResource.ManifestResourceName)' == '' and '%(EmbeddedResource.WithCulture)' == 'true' and '%(EmbeddedResource.Type)' == 'Non-Resx') was evaluated as ('' == '' and 'false' == 'true' and 'Non-Resx' == 'Non-Resx').
Done building target "CreateManifestResourceNames" in project "COS.BusinessEntities.csproj".

然后再往下看一点：

Target "_GenerateCompileInputs" in file "c:\WINDOWS\Microsoft.NET\Framework\v3.5\Microsoft.Common.targets":
  Task "Warning" skipped, due to false condition; ('@(ManifestResourceWithNoCulture)'!='' and '%(ManifestResourceWithNoCulture.EmittedForCompatibilityOnly)'=='') was evaluated as (''!='' and ''=='').
  Task "Warning" skipped, due to false condition; ('@(ManifestNonResxWithNoCultureOnDisk)'!='' and '%(ManifestNonResxWithNoCultureOnDisk.EmittedForCompatibilityOnly)'=='') was evaluated as ('C:\Documents and Settings\<my username>\Local Settings\Temp\tmp6D36.tmp;C:\Documents and Settings\<my username>\Local Settings\Temp\tmp6D38.tmp;C:\Documents and Settings\<my username>\Local Settings\Temp\tmp6D37.tmp'!='' and 'true'=='').
Done building target "_GenerateCompileInputs" in project "COS.BusinessEntities.csproj".

看起来还有一些其他的临时文件，但我不确定它们为什么会被生成，或者为什么被视为项目的输入。

非常感谢迄今为止的帮助！

- RebelScum

Answer 1

好了，我终于搞明白了。为了后人，我在这里发布答案。

在“解决方案资源管理器”中，我双击导致此问题的.edmx文件以打开“模型浏览器”。在“模型浏览器”中，我选择了我的模型，并在“属性”窗口中将“元数据工件处理”更改为“复制到输出目录”。

之后，它就可以正常工作了（不需要不必要的重建）！此外，有人告诉我，在VS2010中不会发生这种情况（尽管我没有测试过）。

- RebelScum