c# - Visual Studio 2015 RC Entity Framework 6.1.3 迁移错误

Question

仅当解决方案有多个引用 EntityFramework 的项目时，才会出现下面粘贴的错误。当运行“Enable-Migrations”或“Add-Migration”时，我收到以下错误:

New-Object : The value supplied is not valid, or the property is read-only. Change the value, and then try again. At D:\Projetos\Monitoramento\packages\EntityFramework.6.1.3\tools\EntityFramework.psm1:757 char:13 + $info = New-Object System.AppDomainSetup -Property @{ + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : InvalidData: (:) [New-Object], Exception + FullyQualifiedErrorId : SetValueException,Microsoft.PowerShell.Commands.NewObjectCommand The property 'PrivateBinPath' cannot be found on this object. Verify that the property exists and can be set. At D:\Projetos\Monitoramento\packages\EntityFramework.6.1.3\tools\EntityFramework.psm1:772 char:9 + $info.PrivateBinPath += ';lib\net45' + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : InvalidOperation: (:) [], RuntimeException + FullyQualifiedErrorId : PropertyNotFound Exception calling "LoadFrom" with "1" argument(s): "The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters." At D:\Projetos\Monitoramento\packages\EntityFramework.6.1.3\tools\EntityFramework.psm1:780 char:5 + $utilityAssembly = [System.Reflection.Assembly]::LoadFrom((Join-Path $ToolsP ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : PathTooLongException You cannot call a method on a null-valued expression. At D:\Projetos\Monitoramento\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): "The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters." At D:\Projetos\Monitoramento\packages\EntityFramework.6.1.3\tools\EntityFramework.psm1:809 char:5 + $domain.CreateInstanceFrom( + ~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : PathTooLongException

使用 EntityFramework 6.1.1 的输出:

Exception calling "LoadFrom" with "1" argument(s): "The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters." At C:\Users\Hudson\Documents\Visual Studio 2015\Projects\WpfApplication4\packages\EntityFramework.6.1.1\tools\EntityFramework.psm1:780 char:5 + $utilityAssembly = [System.Reflection.Assembly]::LoadFrom((Join-Path $ToolsP ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : PathTooLongException You cannot call a method on a null-valued expression. At C:\Users\Hudson\Documents\Visual Studio 2015\Projects\WpfApplication4\packages\EntityFramework.6.1.1\tools\EntityFramework.psm1:781 char:5 + $dispatcher = $utilityAssembly.CreateInstance( + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : InvalidOperation: (:) [], RuntimeException + FullyQualifiedErrorId : InvokeMethodOnNull Exception calling "CreateInstanceFrom" with "8" argument(s): "The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters." At C:\Users\Hudson\Documents\Visual Studio 2015\Projects\WpfApplication4\packages\EntityFramework.6.1.1\tools\EntityFramework.psm1:809 char:5 + $domain.CreateInstanceFrom( + ~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : PathTooLongException

Answer 1

其他解决方案:https://github.com/aspnet/EntityFramework/issues/1950#issuecomment-99164398

复制this patched version of EntityFramework.psm1 .