MongoDB 驱动程序抛出文件未找到异常
MongoDB driver throws file not found exception
我正在将 ASP.NET Core 1 应用程序从 RC 1 迁移到 RC 2。一个应用程序本身有 Web 应用程序（针对 netcoreapp1.0）和两个 class 模型库（.NET Core）和数据访问层（针对netstandard1.5）。这些 class 库使用 MongoDB 驱动程序 2.2.4。应用程序恢复依赖关系并编译，没有任何错误。但是，在 MongoDB 客户端初始化期间抛出 FileNotFound 异常。
An exception of type 'System.IO.FileNotFoundException' occurred in MongoDB.Driver.dll but was not handled in user code
Additional information: Could not load file or assembly 'System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The system cannot find the file specified.
at MongoDB.Driver.MongoUrlBuilder.Parse(String url)
at MongoDB.Driver.MongoUrl..ctor(String url)
at MongoDB.Driver.MongoClient..ctor(String connectionString)
at GS.Quest.DataAccess.Context..ctor() in
CoreWebApp\src\DataAccess\Context.cs:line 9
什么会导致此问题？当前是否有可能在 ASP.NET Core RC 2 应用程序中使用遗留 MongoDB 驱动程序，而根本不等待 .NET 核心版本的驱动程序？此外，ASP.NET Core RC 1 应用程序没有问题。
网络应用程序project.json
{
"userSecretsId": "aspnet-CoreWebApp-6f0c9639-a671-45df-afcb-f126e55c6e3e",
"dependencies": {
"Microsoft.NETCore.App": {
"version": "1.0.0-rc2-3002702",
"type": "platform"
},
"Microsoft.ApplicationInsights.AspNetCore": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Authentication.Cookies": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Diagnostics": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Mvc": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Razor.Tools": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Server.Kestrel": "1.0.0-rc2-final",
"Microsoft.AspNetCore.StaticFiles": "1.0.0-rc2-final",
"Microsoft.EntityFrameworkCore.SqlServer": "1.0.0-rc2-final",
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-rc2-final",
"Microsoft.Extensions.Configuration.Json": "1.0.0-rc2-final",
"Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging.Console": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging.Debug": "1.0.0-rc2-final",
"Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-rc2-final",
"Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"Microsoft.VisualStudio.Web.CodeGenerators.Mvc": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"MongoDB.Driver": "2.2.4",
"Models": "1.0.0.*",
"DataAccess": "1.0.0.*"
},
"tools": {
"Microsoft.AspNetCore.Razor.Tools": {
"version": "1.0.0-preview1-final",
"imports": "portable-net45+win8+dnxcore50"
},
"Microsoft.AspNetCore.Server.IISIntegration.Tools": {
"version": "1.0.0-preview1-final",
"imports": "portable-net45+win8+dnxcore50"
},
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.0.0-preview1-final",
"imports": [
"portable-net45+win8+dnxcore50",
"portable-net45+win8"
]
},
"Microsoft.Extensions.SecretManager.Tools": {
"version": "1.0.0-preview1-final",
"imports": "portable-net45+win8+dnxcore50"
},
"Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
"version": "1.0.0-preview1-final",
"imports": [
"portable-net45+win8+dnxcore50",
"portable-net45+win8"
]
}
},
"frameworks": {
"netcoreapp1.0": {
"imports": [
"dotnet5.6",
"dnxcore50",
"dnx451",
"portable-net45+win8"
]
}
},
"buildOptions": {
"emitEntryPoint": true,
"preserveCompilationContext": true
},
"runtimeOptions": {
"gcServer": true
},
"publishOptions": {
"include": [
"wwwroot",
"Views",
"appsettings.json",
"web.config"
]
},
"scripts": {
"prepublish": [ "npm install", "bower install", "gulp clean", "gulp min" ],
"postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
}
}
型号project.json
{
"version": "1.0.0-*",
"dependencies": {
"NETStandard.Library": "1.5.0-rc2-24027",
"Microsoft.NETCore.Portable.Compatibility": "1.0.1-rc2-24027",
"MongoDB.Driver": "2.2.4"
},
"frameworks": {
"netstandard1.5": {
"imports": [ "dnxcore50", "dnx451" ]
}
}
}
数据访问project.json
{
"version": "1.0.0-*",
"dependencies": {
"NETStandard.Library": "1.5.0-rc2-24027",
"Microsoft.NETCore.Portable.Compatibility": "1.0.1-rc2-24027",
"Microsoft.Extensions.Logging": "1.0.0-rc2-final",
"MongoDB.Driver": "2.2.4",
"Models": "1.0.0-*"
},
"frameworks": {
"netstandard1.5": {
"imports": [ "dnxcore50", "dnx451" ]
}
}
}
在迁移过程中，我一直在关注 official documentation，然后我尝试将现有源代码移动到示例 ASP.NET 由 Visual Studio 2015 创建的 Core 1 RC 2 Web 应用程序。
更新
迁移到 net451 框架后，项目文件如下所示
网络应用程序
{
"userSecretsId": "aspnet-CoreWebApp-6f0c9639-a671-45df-afcb-f126e55c6e3e",
"dependencies": {
"Microsoft.ApplicationInsights.AspNetCore": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Authentication.Cookies": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Diagnostics": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Mvc": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Razor.Tools": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Server.Kestrel": "1.0.0-rc2-final",
"Microsoft.AspNetCore.StaticFiles": "1.0.0-rc2-final",
"Microsoft.EntityFrameworkCore.SqlServer": "1.0.0-rc2-final",
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-rc2-final",
"Microsoft.Extensions.Configuration.Json": "1.0.0-rc2-final",
"Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging.Console": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging.Debug": "1.0.0-rc2-final",
"Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-rc2-final",
"Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"Microsoft.VisualStudio.Web.CodeGenerators.Mvc": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"MongoDB.Driver": "2.2.4",
"Models": "1.0.0.*",
"DataAccess": "1.0.0.*"
},
"tools": {
"Microsoft.AspNetCore.Razor.Tools": {
"version": "1.0.0-preview1-final",
"imports": "portable-net45+win8+dnxcore50"
},
"Microsoft.AspNetCore.Server.IISIntegration.Tools": {
"version": "1.0.0-preview1-final",
"imports": "portable-net45+win8+dnxcore50"
},
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.0.0-preview1-final",
"imports": [
"portable-net45+win8+dnxcore50",
"portable-net45+win8"
]
},
"Microsoft.Extensions.SecretManager.Tools": {
"version": "1.0.0-preview1-final",
"imports": "portable-net45+win8+dnxcore50"
},
"Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
"version": "1.0.0-preview1-final",
"imports": [
"portable-net45+win8+dnxcore50",
"portable-net45+win8"
]
}
},
"frameworks": {
"net451": { }
},
"buildOptions": {
"emitEntryPoint": true,
"preserveCompilationContext": true
},
"runtimeOptions": {
"gcServer": true
},
"publishOptions": {
"include": [
"wwwroot",
"Views",
"appsettings.json",
"web.config"
]
},
"scripts": {
"prepublish": [ "npm install", "bower install", "gulp clean", "gulp min" ],
"postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
}
}
型号
{
"version": "1.0.0-*",
"dependencies": {
"MongoDB.Driver": "2.2.4"
},
"frameworks": {
"net451": { }
}
}
数据访问
{
"version": "1.0.0-*",
"dependencies": {
"Microsoft.Extensions.Logging": "1.0.0-rc2-final",
"Models": "1.0.0-*"
},
"frameworks": {
"net451": { }
}
}
您不能在 netappcore1.0 应用程序中定位 MongoDB 驱动程序！并且请不要在 netappcore1.0 导入中使用 dnx451。 .NET 4.5.1 程序集不适用于 .NET Core 应用程序！只有.NET Core程序集（win8和win8.1/uwp都是基于.NET的，dnx451是不是）。它本质上说："Install MongoDb in .NET Core Application, even if it doesn't target/support it"。
"netcoreapp1.0": {
"imports": [
"dotnet5.6",
"dnxcore50",
"dnx451",
"portable-net45+win8"
]
}
这将强制 nuget 恢复 dnx451/net451 包，即使它们不受支持。 imports 部分只是作为一种解决方法，用于强制恢复与 .NET 核心兼容但尚未针对 netstandard1.5 的包（例如为 UWP、Win8 或 Win8.1 编写的包）。
如果您想使用 MongoDB 个驱动程序，您必须以 net451 为目标，而不是 netcoreapp1.0 或 netstandard1.5。这适用于所有引用 MongoDB 的项目和子项目。
我正在将 ASP.NET Core 1 应用程序从 RC 1 迁移到 RC 2。一个应用程序本身有 Web 应用程序（针对 netcoreapp1.0）和两个 class 模型库（.NET Core）和数据访问层（针对netstandard1.5）。这些 class 库使用 MongoDB 驱动程序 2.2.4。应用程序恢复依赖关系并编译，没有任何错误。但是，在 MongoDB 客户端初始化期间抛出 FileNotFound 异常。
An exception of type 'System.IO.FileNotFoundException' occurred in MongoDB.Driver.dll but was not handled in user code
Additional information: Could not load file or assembly 'System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The system cannot find the file specified.
at MongoDB.Driver.MongoUrlBuilder.Parse(String url)
at MongoDB.Driver.MongoUrl..ctor(String url)
at MongoDB.Driver.MongoClient..ctor(String connectionString)
at GS.Quest.DataAccess.Context..ctor() in
CoreWebApp\src\DataAccess\Context.cs:line 9
什么会导致此问题？当前是否有可能在 ASP.NET Core RC 2 应用程序中使用遗留 MongoDB 驱动程序，而根本不等待 .NET 核心版本的驱动程序？此外，ASP.NET Core RC 1 应用程序没有问题。
网络应用程序project.json
{
"userSecretsId": "aspnet-CoreWebApp-6f0c9639-a671-45df-afcb-f126e55c6e3e",
"dependencies": {
"Microsoft.NETCore.App": {
"version": "1.0.0-rc2-3002702",
"type": "platform"
},
"Microsoft.ApplicationInsights.AspNetCore": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Authentication.Cookies": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Diagnostics": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Mvc": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Razor.Tools": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Server.Kestrel": "1.0.0-rc2-final",
"Microsoft.AspNetCore.StaticFiles": "1.0.0-rc2-final",
"Microsoft.EntityFrameworkCore.SqlServer": "1.0.0-rc2-final",
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-rc2-final",
"Microsoft.Extensions.Configuration.Json": "1.0.0-rc2-final",
"Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging.Console": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging.Debug": "1.0.0-rc2-final",
"Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-rc2-final",
"Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"Microsoft.VisualStudio.Web.CodeGenerators.Mvc": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"MongoDB.Driver": "2.2.4",
"Models": "1.0.0.*",
"DataAccess": "1.0.0.*"
},
"tools": {
"Microsoft.AspNetCore.Razor.Tools": {
"version": "1.0.0-preview1-final",
"imports": "portable-net45+win8+dnxcore50"
},
"Microsoft.AspNetCore.Server.IISIntegration.Tools": {
"version": "1.0.0-preview1-final",
"imports": "portable-net45+win8+dnxcore50"
},
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.0.0-preview1-final",
"imports": [
"portable-net45+win8+dnxcore50",
"portable-net45+win8"
]
},
"Microsoft.Extensions.SecretManager.Tools": {
"version": "1.0.0-preview1-final",
"imports": "portable-net45+win8+dnxcore50"
},
"Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
"version": "1.0.0-preview1-final",
"imports": [
"portable-net45+win8+dnxcore50",
"portable-net45+win8"
]
}
},
"frameworks": {
"netcoreapp1.0": {
"imports": [
"dotnet5.6",
"dnxcore50",
"dnx451",
"portable-net45+win8"
]
}
},
"buildOptions": {
"emitEntryPoint": true,
"preserveCompilationContext": true
},
"runtimeOptions": {
"gcServer": true
},
"publishOptions": {
"include": [
"wwwroot",
"Views",
"appsettings.json",
"web.config"
]
},
"scripts": {
"prepublish": [ "npm install", "bower install", "gulp clean", "gulp min" ],
"postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
}
}
型号project.json
{
"version": "1.0.0-*",
"dependencies": {
"NETStandard.Library": "1.5.0-rc2-24027",
"Microsoft.NETCore.Portable.Compatibility": "1.0.1-rc2-24027",
"MongoDB.Driver": "2.2.4"
},
"frameworks": {
"netstandard1.5": {
"imports": [ "dnxcore50", "dnx451" ]
}
}
}
数据访问project.json
{
"version": "1.0.0-*",
"dependencies": {
"NETStandard.Library": "1.5.0-rc2-24027",
"Microsoft.NETCore.Portable.Compatibility": "1.0.1-rc2-24027",
"Microsoft.Extensions.Logging": "1.0.0-rc2-final",
"MongoDB.Driver": "2.2.4",
"Models": "1.0.0-*"
},
"frameworks": {
"netstandard1.5": {
"imports": [ "dnxcore50", "dnx451" ]
}
}
}
在迁移过程中，我一直在关注 official documentation，然后我尝试将现有源代码移动到示例 ASP.NET 由 Visual Studio 2015 创建的 Core 1 RC 2 Web 应用程序。
更新
迁移到 net451 框架后，项目文件如下所示
网络应用程序
{
"userSecretsId": "aspnet-CoreWebApp-6f0c9639-a671-45df-afcb-f126e55c6e3e",
"dependencies": {
"Microsoft.ApplicationInsights.AspNetCore": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Authentication.Cookies": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Diagnostics": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Mvc": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Razor.Tools": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Server.Kestrel": "1.0.0-rc2-final",
"Microsoft.AspNetCore.StaticFiles": "1.0.0-rc2-final",
"Microsoft.EntityFrameworkCore.SqlServer": "1.0.0-rc2-final",
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-rc2-final",
"Microsoft.Extensions.Configuration.Json": "1.0.0-rc2-final",
"Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging.Console": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging.Debug": "1.0.0-rc2-final",
"Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-rc2-final",
"Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"Microsoft.VisualStudio.Web.CodeGenerators.Mvc": {
"version": "1.0.0-preview1-final",
"type": "build"
},
"MongoDB.Driver": "2.2.4",
"Models": "1.0.0.*",
"DataAccess": "1.0.0.*"
},
"tools": {
"Microsoft.AspNetCore.Razor.Tools": {
"version": "1.0.0-preview1-final",
"imports": "portable-net45+win8+dnxcore50"
},
"Microsoft.AspNetCore.Server.IISIntegration.Tools": {
"version": "1.0.0-preview1-final",
"imports": "portable-net45+win8+dnxcore50"
},
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.0.0-preview1-final",
"imports": [
"portable-net45+win8+dnxcore50",
"portable-net45+win8"
]
},
"Microsoft.Extensions.SecretManager.Tools": {
"version": "1.0.0-preview1-final",
"imports": "portable-net45+win8+dnxcore50"
},
"Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
"version": "1.0.0-preview1-final",
"imports": [
"portable-net45+win8+dnxcore50",
"portable-net45+win8"
]
}
},
"frameworks": {
"net451": { }
},
"buildOptions": {
"emitEntryPoint": true,
"preserveCompilationContext": true
},
"runtimeOptions": {
"gcServer": true
},
"publishOptions": {
"include": [
"wwwroot",
"Views",
"appsettings.json",
"web.config"
]
},
"scripts": {
"prepublish": [ "npm install", "bower install", "gulp clean", "gulp min" ],
"postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
}
}
型号
{
"version": "1.0.0-*",
"dependencies": {
"MongoDB.Driver": "2.2.4"
},
"frameworks": {
"net451": { }
}
}
数据访问
{
"version": "1.0.0-*",
"dependencies": {
"Microsoft.Extensions.Logging": "1.0.0-rc2-final",
"Models": "1.0.0-*"
},
"frameworks": {
"net451": { }
}
}
您不能在 netappcore1.0 应用程序中定位 MongoDB 驱动程序！并且请不要在 netappcore1.0 导入中使用 dnx451。 .NET 4.5.1 程序集不适用于 .NET Core 应用程序！只有.NET Core程序集（win8和win8.1/uwp都是基于.NET的，dnx451是不是）。它本质上说："Install MongoDb in .NET Core Application, even if it doesn't target/support it"。
"netcoreapp1.0": {
"imports": [
"dotnet5.6",
"dnxcore50",
"dnx451",
"portable-net45+win8"
]
}
这将强制 nuget 恢复 dnx451/net451 包，即使它们不受支持。 imports 部分只是作为一种解决方法，用于强制恢复与 .NET 核心兼容但尚未针对 netstandard1.5 的包（例如为 UWP、Win8 或 Win8.1 编写的包）。
如果您想使用 MongoDB 个驱动程序，您必须以 net451 为目标，而不是 netcoreapp1.0 或 netstandard1.5。这适用于所有引用 MongoDB 的项目和子项目。