MongoDB驱动程序抛出找不到文件的异常
我正在将ASP.NET Core 1应用程序从RC 1迁移到RC 2.应用程序本身具有Web应用程序（netcoreapp1.0目标）和两个用于模型和数据访问层的类库（.NET Core）（netstandard1.5）有针对性的）。这些类库使用MongoDB驱动程序2.2.4。应用程序恢复依赖关系并编译而没有任何错误。但是，在初始化MongoDB客户端期间会抛出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
可能导致此问题的原因是什么？是否有可能使用旧的MongoDB驱动程序用于ASP.NET Core RC 2应用程序而无需等待.NET核心版本的驱动程序？此外，ASP.NET Core RC 1应用程序没有任何问题。
Web App 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%" ]
}
}
模型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" ]
}
}
}
DataAccess 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，我关注official documentation，然后尝试将现有源代码移动到Visual Studio 2015创建的ASP.NET Core 1 RC 2 Web应用程序示例。
更新
转移到net451框架后，项目文件看起来如下
网络应用
{
"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%" ]
}
}
模型
{
"version": "1.0.0-*",
"dependencies": {
"MongoDB.Driver": "2.2.4"
},
"frameworks": {
"net451": { }
}
}
DataAcess
{
"version": "1.0.0-*",
"dependencies": {
"Microsoft.Extensions.Logging": "1.0.0-rc2-final",
"Models": "1.0.0-*"
},
"frameworks": {
"net451": { }
}
}
1 个答案:
答案 0 :(得分：2)
您无法在netappcore1.0应用程序中定位MongoDB驱动程序！请不要在dnx451导入中使用netappcore1.0。 .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基于.NET，dnx451 不）。它基本上说：＆＃34;在.NET核心应用程序中安装MongoDb，即使它没有瞄准/支持它＆＃34;
"netcoreapp1.0": {
"imports": [
"dotnet5.6",
"dnxcore50",
"dnx451",
"portable-net45+win8"
]
}
这会强制nuget恢复dnx451 / net451个包，即使它们不受支持也是如此。 imports部分仅作为一种解决方法，强制恢复与.NET内核兼容但尚未定位netstandard1.5的软件包（如为UWP，Win8或Win8.1编写的软件包）。
如果您想使用MongoDB驱动程序，则必须定位net451，而不是netcoreapp1.0或netstandard1.5。这适用于引用MongoDB的所有项目和子项目。
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