.NET Framework 4.7.2 升级 - 无法加载项目文件

Question

我刚刚浏览了解决方案中的每个项目，并从 .NET Framework 4.6.1 => 4.7.2 升级，只有一个项目无法加载。当我尝试重新加载项目时，它会抛出此错误：

3:07 PM Project 'MyProject' load finished with warnings: The project file could not be loaded. Data at the root level is invalid. Line 1, position 1. at (1:1)

3:07 PM Project 'MyProjectEmailService' load failed: The project file could not be loaded. Data at the root level is invalid. Line 1, position 1.  C:\Projects\Repo\Source\MyProject\MyProjectEmailService\MyProjectEmailService.csproj at (1:1)

3:07 PM Project 'MyProjectEmailService.Tests' load finished with warnings: The project file could not be loaded. Data at the root level is invalid. Line 1, position 1. at (1:1)

3:07 PM Project 'MyProjectEmailService.Tests' load finished with warnings: The project file could not be loaded. Data at the root level is invalid. Line 1, position 1. at (1:1)

3:08 PM Project 'MyProjectEmailService' load failed: The project file could not be loaded. The 'Project' start tag on line 2 position 2 does not match the end tag of 'Target'. Line 281, position 5.  C:\Projects\Repo\Source\MyProject\MyProjectEmailService\MyProjectEmailService.csproj at (281:5)

3:09 PM Project 'MyProjectEmailService' load failed: The project file could not be loaded. The 'Project' start tag on line 2 position 2 does not match the end tag of 'Target'. Line 281, position 5.  C:\Projects\Repo\Source\MyProject\MyProjectEmailService\MyProjectEmailService.csproj at (281:5)

据我所知，MyProjectEmailService.csproj 中的第 281 行似乎有问题

在第 281 行，我找到了</target>

  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
    <PropertyGroup>
      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
    </PropertyGroup>
    <Error Condition="!Exists('..\..\packages\OctoPack.3.6.1\build\OctoPack.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\OctoPack.3.6.1\build\OctoPack.targets'))" />
    <Error Condition="!Exists('..\..\packages\Selenium.Firefox.WebDriver.0.23.0\build\Selenium.Firefox.WebDriver.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Selenium.Firefox.WebDriver.0.23.0\build\Selenium.Firefox.WebDriver.targets'))" />
    <Error Condition="!Exists('..\..\packages\Selenium.WebDriver.GeckoDriver.0.24.0\build\Selenium.WebDriver.GeckoDriver.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Selenium.WebDriver.GeckoDriver.0.24.0\build\Selenium.WebDriver.GeckoDriver.targets'))" />
  </Target>
  <Import Project="..\..\packages\OctoPack.3.6.1\build\OctoPack.targets" Condition="Exists('..\..\packages\OctoPack.3.6.1\build\OctoPack.targets')" />
  <Import Project="..\..\packages\Selenium.Firefox.WebDriver.0.23.0\build\Selenium.Firefox.WebDriver.targets" Condition="Exists('..\..\packages\Selenium.Firefox.WebDriver.0.23.0\build\Selenium.Firefox.WebDriver.targets')" />
  <Import Project="..\..\packages\Selenium.WebDriver.GeckoDriver.0.24.0\build\Selenium.WebDriver.GeckoDriver.targets" Condition="Exists('..\..\packages\Selenium.WebDriver.GeckoDriver.0.24.0\build\Selenium.WebDriver.GeckoDriver.targets')" />
  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
  </Target>
  <Target Name="AfterBuild">
  </Target>
  -->
</Project>

这是csproj 文件的第一行

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
  <PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>

如何解决这个问题并让我的项目正确加载？另外，如果您需要更多信息，请告诉我。

Answer 1

其实我认为 Prateek 已经找到了问题的原因。

你上面分享的内容的正确格式应该是这样的：

<Project...>
  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
  <PropertyGroup>
      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
  </PropertyGroup>
  <Error Condition="!Exists('..\..\packages\OctoPack.3.6.1\build\OctoPack.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\OctoPack.3.6.1\build\OctoPack.targets'))" />
  <Error Condition="!Exists('..\..\packages\Selenium.Firefox.WebDriver.0.23.0\build\Selenium.Firefox.WebDriver.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Selenium.Firefox.WebDriver.0.23.0\build\Selenium.Firefox.WebDriver.targets'))" />
  <Error Condition="!Exists('..\..\packages\Selenium.WebDriver.GeckoDriver.0.24.0\build\Selenium.WebDriver.GeckoDriver.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Selenium.WebDriver.GeckoDriver.0.24.0\build\Selenium.WebDriver.GeckoDriver.targets'))" />

  </Target> //**This line is where the error occurs**

  <Import Project="..\..\packages\OctoPack.3.6.1\build\OctoPack.targets" Condition="Exists('..\..\packages\OctoPack.3.6.1\build\OctoPack.targets')" />
  <Import Project="..\..\packages\Selenium.Firefox.WebDriver.0.23.0\build\Selenium.Firefox.WebDriver.targets" Condition="Exists('..\..\packages\Selenium.Firefox.WebDriver.0.23.0\build\Selenium.Firefox.WebDriver.targets')" />
  <Import Project="..\..\packages\Selenium.WebDriver.GeckoDriver.0.24.0\build\Selenium.WebDriver.GeckoDriver.targets" Condition="Exists('..\..\packages\Selenium.WebDriver.GeckoDriver.0.24.0\build\Selenium.WebDriver.GeckoDriver.targets')" />

  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
  </Target>
  <Target Name="AfterBuild">
  </Target>
  -->
</Project>

现在很明显您有一个额外的</Target>，我假设您在升级之前可能有一个自定义目标，并在升级后删除该目标。但是不小心忘记删除它的结束标签。

解决方案：

所以我认为删除</Target> 行可以帮助解决这个问题。

而且这个问题是可重现的，在 VS 中创建一个新的控制台项目，卸载它并在其中添加一行，然后当您单击重新加载按钮时会发生类似的问题：

修改项目文件时要小心。