在VS 2012中创建MVC控制器时出错

Question

当我右键单击一个文件夹并单击“”时，我会得到以下错误：

Object reference not set to an instance of an object

打开项目时，软件包管理器控制台中也会出现此错误。

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

这个问题是完全一样的。

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，会得到另一个错误：

The update is not applicable to your computer.

另外值得一提的是，这个错误只发生在一个特定的项目中，如果我创建了一个新的MVC项目，它可以正常工作。

如果我能避免把所有的东西都搬到一个新的项目上，我就不太棒了。有什么建议吗？

更新

尝试从包管理器控制台安装MvcScaffolding时会发生错误。

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。现在我有了它：