我正在使用Visual Web Developer Express 2010，Windows XP，并在项目中使用ASP.NET MVC4 RC。我安装了NuGet v2.0.30619.9119。
我现在正尝试通过NuGet Package Manager Console安装MvcScaffolding软件包。我收到以下错误：
PM> Install-Package MvcScaffolding
Attempting to resolve dependency 'T4Scaffolding'.
Attempting to resolve dependency 'EntityFramework (≥ 4.1.10311.0)'.
You are downloading EntityFramework from Microsoft, the license agreement to which is available at http://go.microsoft.com/fwlink/?LinkId=224682. Check the package for additional dependencies, which may come with their own license agreement(s). Your use of the package and dependencies constitutes your acceptance of their license agreements. If you do not accept the license agreement(s), then delete the relevant components from your device.
Successfully installed 'EntityFramework 4.1.10715.0'.
Successfully installed 'T4Scaffolding 1.0.6'.
File Y:\asp\packages\T4Scaffolding.1.0.6\tools\init.ps1 cannot be loaded. The file Y:\asp\packages\T4Scaffolding.1.0.6\tools\init.ps
1 is not digitally signed. The script will not execute on the system. Please see "get-help about_signing" for more details..
At line:1 char:2
+ & <<<< 'Y:\asp\packages\T4Scaffolding.1.0.6\tools\init.ps1' $__rootPath $__toolsPath $__package $__project
+ CategoryInfo : NotSpecified: (:) [], PSSecurityException
+ FullyQualifiedErrorId : RuntimeException
Successfully installed 'MvcScaffolding 1.0.7'.
File Y:\asp\packages\MvcScaffolding.1.0.7\tools\init.ps1 cannot be loaded. The file Y:\asp\packages\MvcScaffolding.1.0.7\tools\init.
ps1 is not digitally signed. The script will not execute on the system. Please see "get-help about_signing" for more details..
At line:1 char:2
+ & <<<< 'Y:\asp\packages\MvcScaffolding.1.0.7\tools\init.ps1' $__rootPath $__toolsPath $__package $__project
+ CategoryInfo : NotSpecified: (:) [], PSSecurityException
+ FullyQualifiedErrorId : RuntimeException
Successfully added 'EntityFramework 4.1.10715.0' to MyProject.Web.
Successfully added 'T4Scaffolding 1.0.6' to MyProject.Web.
File Y:\asp\packages\T4Scaffolding.1.0.6\tools\install.ps1 cannot be loaded. The file Y:\asp\packages\T4Scaffolding.1.0.6\tools\inst
all.ps1 is not digitally signed. The script will not execute on the system. Please see "get-help about_signing" for more details..
At line:1 char:2
+ & <<<< 'Y:\asp\packages\T4Scaffolding.1.0.6\tools\install.ps1' $__rootPath $__toolsPath $__package $__project
+ CategoryInfo : NotSpecified: (:) [], PSSecurityException
+ FullyQualifiedErrorId : RuntimeException
'InstallationDummyFile.txt' already exists. Skipping...
Successfully added 'MvcScaffolding 1.0.7' to MyProject.Web.
File Y:\asp\packages\MvcScaffolding.1.0.7\tools\install.ps1 cannot be loaded. The file Y:\asp\packages\MvcScaffolding.1.0.7\tools\in
stall.ps1 is not digitally signed. The script will not execute on the system. Please see "get-help about_signing" for more details..
At line:1 char:2
+ & <<<< 'Y:\asp\packages\MvcScaffolding.1.0.7\tools\install.ps1' $__rootPath $__toolsPath $__package $__project
+ CategoryInfo : NotSpecified: (:) [], PSSecurityException
+ FullyQualifiedErrorId : RuntimeException
由于安装后未执行init脚本，因此未正确安装MvcScaffolding包，并且无法识别scaffold命令。
我不知道如何处理这些代码签名问题。以下是当前的安全设置：
PM> Get-ExecutionPolicy -List
Scope ExecutionPolicy
----- ---------------
MachinePolicy Undefined
UserPolicy Undefined
Process RemoteSigned
CurrentUser Undefined
LocalMachine Unrestricted
我可以将Process范围更改为Unrestricted吗？如果是这样，怎么样？在NuGet控制台中运行Set-ExecutionPolicy不起作用：
PM> Set-ExecutionPolicy Unrestricted
Execution Policy Change
The execution policy helps protect you from scripts that you do not trust. Changing the execution policy might expose you to the security risks described in the about_Execution_Policies help topic. Do you want to change the execution policy?
[Y] Yes [N] No [S] Suspend [?] Help (default is "Y"):Y
Set-ExecutionPolicy : Windows PowerShell updated your execution policy successfully, but the setting is overridden by a policy defined at a more specific scope. Due to the override, your shell will
retain its current effective execution policy of "RemoteSigned". Type "Get-ExecutionPolicy -List" to view your execution policy settings. For more information, please see "Get-Help Set-ExecutionPol
icy."
At line:1 char:20
+ Set-ExecutionPolicy <<<< Unrestricted
+ CategoryInfo : PermissionDenied: (:) [Set-ExecutionPolicy], SecurityException
+ FullyQualifiedErrorId : ExecutionPolicyOverride,Microsoft.PowerShell.Commands.SetExecutionPolicyCommand
我也尝试过以管理员身份完成这一切，但也没有帮助。
非常感谢任何建议或想法。
更新
我可以在NuGet中设置流程执行策略，如下所示：
Set-ExecutionPolicy Unrestricted -Scope Process
但是当我重新启动Visual Web Developer时，设置被遗忘了，我仍然遇到错误，因为它一直试图执行init.psl个文件
如何永久更改执行政策？
答案 0 :(得分：11)
好的，我现在正确安装了MvcScaffolding。
我必须首先绕过NuGet中的所有安全性：
Set-ExecutionPolicy Bypass -Scope Process
但是当我重新启动Visual Web Developer时，我仍然会在启动时运行init.pls的NuGet获得相同的PowerShell错误。
我已经知道这是因为我将我的项目存储在网络驱动器上。显然，PowerShell默认情况下不会从网络驱动器执行脚本。
我尝试使用CasPol更改安全设置，但无法使其正常工作。当我看到其他人无法让VS使用映射驱动器时，我放弃了：
CAS not working for VS2010 mapped drive
无论如何，我现在只需将我的项目置于本地，并安装并运行MvcScaffolding。
答案 1 :(得分：1)
您可以为用户范围设置策略，并使用更安全的策略，如下所示：
Set-ExecutionPolicy -ExecutionPolicy AllSigned -Scope CurrentUser
要求所有脚本和配置文件都由受信任的发布者签名，包括您在本地计算机上编写的脚本。 在您尚未归类为受信任或不受信任的发布者运行脚本之前提示您。
例如，安装EntityFramework请求运行脚本的权限：
Executing script file 'c:\users\user\documents\visual studio 2015\Projects\zzz\packages\EntityFramework.6.1.3\tools\install.ps1'
Do you want to run software from this untrusted publisher?
File C:\users\user\documents\visual studio 2015\Projects\zzz\packages\EntityFramework.6.1.3\tools\install.ps1 is published by CN=Microsoft Corporation, OU=MOPR, O=Microsoft Corporation, L=Redmond, S=Washington, C=US and is not trusted on your system. Only run scripts from trusted publishers.
[V] Never run [D] Do not run [R] Run once [A] Always run [?] Help (default is "D"):R