Question

当我右键单击文件夹并单击“添加控制器”时，我收到此错误：

Object reference not set to an instance of an object

当我打开项目时，此错误也开始出现在软件包管理器控制台中。

New-Object : Could not load file or assembly 'System.Management.Automation, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
At C:\Users\b\Desktop\Git\EyeglassShop\packages\MvcScaffolding.1.0.9\tools\registerWithMvcTooling.ps1:163 char:27
+     $newProvider = New-Object <<<<  $powerShellScaffolderProviderType($mvcScaffoldingProvider)
    + CategoryInfo          : NotSpecified: (:) [New-Object], FileNotFoundException
    + FullyQualifiedErrorId : System.IO.FileNotFoundException,Microsoft.PowerShell.Commands.NewObjectCommand

这个问题完全相同。

Cannot add a MVC controller VS2012 gives "object reference not set to an instance of an object"

解决方案是安装PowerShell 3，但是当我运行安装程序时，我收到另一个错误：

The update is not applicable to your computer.

另一件值得一提的是，这个错误仅在特定项目中有效，如果我创建一个新的MVC项目，它可以正常工作。

如果我能避免将所有事情都转移到一个新项目上，那我就不会很棒。有什么建议吗？

更新

尝试从程序包管理器控制台安装MvcScaffolding时出现错误

PM> install-package MvcScaffolding
Attempting to resolve dependency 'T4Scaffolding'.
Attempting to resolve dependency 'T4Scaffolding.Core'.
Attempting to resolve dependency 'EntityFramework'.
Successfully installed 'T4Scaffolding.Core 1.0.0'.
Successfully installed 'T4Scaffolding 1.0.8'.
Successfully installed 'MvcScaffolding 1.0.9'.
New-Object : Could not load file or assembly 'System.Management.Automation, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
At C:\Users\b\Desktop\EyeglassShop\EyeglassShop\packages\MvcScaffolding.1.0.9\tools\registerWithMvcTooling.ps1:163 char:27
+     $newProvider = New-Object <<<<  $powerShellScaffolderProviderType($mvcScaffoldingProvider)
    + CategoryInfo          : NotSpecified: (:) [New-Object], FileNotFoundException
    + FullyQualifiedErrorId : System.IO.FileNotFoundException,Microsoft.PowerShell.Commands.NewObjectCommand

Successfully added 'T4Scaffolding.Core 1.0.0' to EyeglassShop.
Successfully added 'T4Scaffolding 1.0.8' to EyeglassShop.
Successfully added 'MvcScaffolding 1.0.9' to EyeglassShop.

Answer 1

我需要安装SP 1才能安装Powershell .. thourght我有它：p

尝试在VS 2012中创建MVC控制器时出错

1 个答案: