Question

我构建了一个相对简单的ASP.Net Core Web应用程序，该应用程序使用Angular 2＆amp;前端的bootstrap和后端的WebApi。

我能够在本地构建和运行我的应用程序（到IIS Express）并且它工作正常，但是，当我尝试使用Build -> Publish菜单时，我遇到了一个非常糟糕的NullReferenceException错误。这是我运行Publish时的输出：

1>------ Publish started: Project: MyProject, Configuration: Release Any CPU ------
Connecting to C:\ProjectDir\MyProject\./bin/Release/PublishTest...
rmdir /S /Q "C:\Users\UserName\AppData\Local\Temp\PublishTemp\MyProject86\"
Environment variables:
Path=%PATH%;.\node_modules\.bin;C:\Program Files (x86)\Microsoft Visual Studio 14.0\Web\External;C:\Program Files (x86)\Microsoft Visual Studio 14.0\Web\External\git
C:\Program Files\dotnet\dotnet.exe publish "C:\ProjectDir\MyProject" --framework net452 --output "C:\Users\UserName\AppData\Local\Temp\PublishTemp\MyProject86" --configuration Release --no-build
Publishing MyProject for .NETFramework,Version=v4.5.2/win7-x64
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\DotNet\Microsoft.DotNet.Publishing.targets(149,5): Error : Object reference not set to an instance of an object.

1>Publish failed due to build errors. Check the error list for more details.
========== Build: 0 succeeded, 0 failed, 3 up-to-date, 0 skipped ==========
========== Publish: 0 succeeded, 1 failed, 0 skipped ==========

我试图将FileSystem发布到运行IIS的服务器上的目录以及本地目录，并且在这两个实例中都得到相同的输出。

我已经清理了我的解决方案，重建并重新启动了Visual Studio，以防万一它处于糟糕的状态。我创建了一些不同的发布配置文件，只是为了确保某些内容没有错误配置（其中一些是在VS2015重新启动后创建的）。

此外，我确定在我遇到此问题后更新VS2015，现在我正在运行版本14.0.25425.01更新3.我还安装了最新的Web工具。

这是我的project.json文件：

{
    "dependencies": {
        "Microsoft.NETCore.App": {
            "version": "1.0.0-rc2-3002702",
            "type": "platform"
        },
        "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.AspNetCore.Mvc.ViewFeatures": "1.0.0-rc2-final",
        "Microsoft.AspNetCore.Mvc": "1.0.0-rc2-final"
    },

    "tools": {
        "Microsoft.AspNetCore.Server.IISIntegration.Tools": {
            "version": "1.0.0-preview1-final",
            "imports": "portable-net45+win8+dnxcore50"
        }
    },

    "frameworks": {
        "net452": {
            "imports": [
                "dotnet5.6",
                "dnxcore50",
                "portable-net45+win8"
            ],
            "dependencies": {
                "aDependency": {
                    "target": "project"
                }
            }
        }
    },

    "buildOptions": {
        "emitEntryPoint": true,
        "preserveCompilationContext": true
    },

    "runtimeOptions": {
        "gcServer": true
    },

    "publishOptions": {
        "include": [
            "wwwroot",
            "web.config"
        ]
    },

    "scripts": {
        "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
    }
}

我一直在寻找有这个问题的其他人，我相信我找到了一两个其他地方似乎遇到了这个问题，但我没有找到任何回复过解决方案甚至理论的人正在发生。任何帮助，理论或线索都将受到赞赏。

感谢您的时间。

编辑：正如评论中所建议的那样，自1.0.0发布以来我创建了一个新的ASP.NET核心应用程序并查看了这些差异。无论如何，对于遇到这个问题（虽然暂时有限）的其他人来说，这是有用的，我觉得很愚蠢，这里是固定的project.json文件：

{
    "dependencies": {
        "Microsoft.NETCore.App": {
            "version": "1.0.0",
            "type": "platform"
        },
        "Microsoft.AspNetCore.Diagnostics": "1.0.0",
        "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
        "Microsoft.AspNetCore.Server.Kestrel": "1.0.0",
        "Microsoft.Extensions.Logging.Console": "1.0.0",
        "Microsoft.AspNetCore.Mvc.ViewFeatures": "1.0.0",
        "Microsoft.AspNetCore.Mvc": "1.0.0",
        "Microsoft.AspNetCore.StaticFiles": "1.0.0"
    },

    "tools": {
        "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final"
    },

    "frameworks": {
        "netcoreapp1.0": {
            "imports": [
                "dotnet5.6",
                "dnxcore50",
                "portable-net45+win8"
            ],
            "dependencies": {
                "aDependency": {
                    "target": "project"
                }
            }
        }
    },

    "buildOptions": {
        "emitEntryPoint": true,
        "preserveCompilationContext": true
    },

    "runtimeOptions": {
        "configProperties": {
            "System.GC.Server": true
        }
    },

    "publishOptions": {
        "include": [
            "wwwroot",
            "web.config"
        ]
    },

    "scripts": {
        "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
    }
}

Answer 1

我认为你应该将你的应用程序从RC2更新到1.0.0，你可能想要创建一个新的web应用程序1.0.0和dot.net的最新工具/ vs项目模板然后比较project.json和启动代码到现有应用程序并更新现有应用程序

使用NullReferenceException

1 个答案: