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我正在研究 ASP.Net 样板框架，现在该机器在我工作的地方不可用，但我的 Google 驱动器上有备份。我怎样才能正确使用该备份？数据库创建，项目运行等？？？我在启用迁移和更新数据库命令上遇到错误

 Exception calling "LoadFrom" with "1" argument(s): "Could not load file or assembly 'file:///F:\Qubit 
 Systems\ShipperBuyerV1\module-zero-template-2.1.1\src\packages\EntityFramework.6.1.3\tools\EntityFramework.PowerShell.Utility.dll' or one of its dependencies. Operation is not supported. 
(Exception from HRESULT: 0x80131515)"
At F:\Qubit Systems\ShipperBuyerV1\module-zero-template-2.1.1\src\packages\EntityFramework.6.1.3\tools\EntityFramework.psm1:780 char:5
+     $utilityAssembly = [System.Reflection.Assembly]::LoadFrom((Join-P ...
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : FileLoadException

You cannot call a method on a null-valued expression.
 At F:\Qubit Systems\ShipperBuyerV1\module-zero-template-2.1.1\src\packages\EntityFramework.6.1.3\tools\EntityFramework.psm1:781 char:5
+     $dispatcher = $utilityAssembly.CreateInstance(
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : InvokeMethodOnNull

 Exception calling "CreateInstanceFrom" with "8" argument(s): "Could not load file or assembly 'file:///F:\Qubit 
 Systems\ShipperBuyerV1\module-zero-template-2.1.1\src\packages\EntityFramework.6.1.3\tools\EntityFramework.PowerShell.dll' or one of its       dependencies. Operation is not supported. (Exception 
from HRESULT: 0x80131515)"
At F:\Qubit Systems\ShipperBuyerV1\module-zero-template-2.1.1\src\packages\EntityFramework.6.1.3\tools\EntityFramework.psm1:809 char:5
+     $domain.CreateInstanceFrom(
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : FileLoadException
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2 回答 2

1

你可以试试：

  • 以管理员身份运行 VS
  • 清洁和重建
  • 删除 obj 文件夹

在某些情况下，您可以使用 Update-Package -Reinstall 来完成重新安装所有包

于 2017-09-14T15:35:49.910 回答
1

使用包管理器，重新安装实体框架：

Uninstall-Package EntityFramework -Force

然后为每个项目安装它：

Install-Package EntityFramework

重新启动 Visual Studio。

于 2017-09-14T06:32:45.837 回答