本文介绍了dnu发布-System.ArgumentNullException:值不能为null的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

运行以下dnu publish时,我抛出了ArgumentNullException异常.

When running the following dnu publish, I get an ArgumentNullException exception thrown.

dnu publish "C:\Project\MyProject" --out "C:\a" --configuration Debug --runtime dnx-clr-win-x86.1.0.0-beta6

引发异常:

Restoring packages for C:\a\approot\src\RelatedProject\project.json
----------
System.ArgumentNullException: Value cannot be null.
Parameter name: key
   at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
   at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& value)
   at Microsoft.Framework.Runtime.Project.GetTargetFramework(FrameworkName targetFramework)
   at Microsoft.Framework.Runtime.ProjectReferenceDependencyProvider.GetDescription(LibraryRange libraryRange, FrameworkName targetFramework)
   at Microsoft.Framework.PackageManager.LocalWalkProvider.FindLibrary(LibraryRange libraryRange, FrameworkName targetFramework, Boolean includeUnlisted)
   at Microsoft.Framework.PackageManager.RestoreOperations.<FindProjectMatch>d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Framework.PackageManager.RestoreOperations.<FindLibraryMatch>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Framework.PackageManager.RestoreOperations.<FindLibraryEntry>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Framework.PackageManager.RestoreOperations.<CreateGraphNode>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Framework.PackageManager.RestoreCommand.<CreateGraphNode>d__71.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
   at Microsoft.Framework.PackageManager.RestoreCommand.<RestoreForProject>d__70.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Framework.PackageManager.RestoreCommand.<>c__DisplayClass69_0.<<Execute>b__1>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.Framework.PackageManager.RestoreCommand.<Execute>d__69.MoveNext()
----------
Restore failed
Value cannot be null.
Parameter name: key

RelatedProject的project.json如下:

The project.json for RelatedProject is as follows:

{
  "version": "1.0.0-*",
  "description": "MyProject.Domain.Model Class Library",

  "dependencies": {
    "System.Collections": "4.0.10-beta-23019",
    "System.Linq": "4.0.0-beta-23019",
    "System.Threading": "4.0.10-beta-23019",
    "System.Runtime": "4.0.10-beta-23019",
    "Microsoft.CSharp": "4.0.0-beta-23019"
  },

  "frameworks": {
    "net451": { }
  }
}

推荐答案

问题归结为以下事实:MyProject定位为dnx451,而RelatedProject(由MyProject引用)定位为net451.将RelatedProject更改为目标dnx451可以解决dnu publish上的问题.

The problem came down to the fact that MyProject was targeting dnx451 and RelatedProject (referenced by MyProject) was targeting net451. Changing RelatedProject to target dnx451 fixed the problem on dnu publish.

这篇关于dnu发布-System.ArgumentNullException:值不能为null的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

06-03 23:28