如何在VS Code中运行指定启动项目的EF Core`update database`任务？

Question

如果我在命令行中运行以下命令：dotnet ef database update --startup-project /code/spike/MyProj.Web

命令运行正常。

如果我在tasks.json中设置这样的任务：

{
      "label": "update database",
      "command": "dotnet",
      "type": "process",
      "args": [
        "ef",
        "database",
        "update",
        "--startup-project ${workspaceFolder}/MyProj.Web"
      ],
      "problemMatcher": "$tsc"
    }

我收到以下错误：

Startup project 'MyProj.Data.csproj' targets framework '.NETStandard'. There is no runtime associated with this framework, and projects targeting it cannot be executed directly. To use the Entity Framework Core .NET Command-line Tools with this project, add an executable project targeting .NET Core or .NET Framework that references this project, and set it as the startup project using --startup-project; or, update this project to cross-target .NET Core or .NET Framework. For more information on using the EF Core Tools with .NET Standard projects, see https://go.microsoft.com/fwlink/?linkid=2034781

有没有办法在VS Code任务中使用--startup-project for EF Core？

Answer 1

大概是你从MyProj.Data项目文件夹中的命令行运行？

VS Code将在工作区文件夹级别运行任务，因此您需要添加指向MyProj.Data.csproj文件的--project arg。

此外，如果它们包含空格，VS代码会在args周围添加引号，因此您需要单独添加arg和值。

e.f.:

{
    "label": "update database",
    "command": "dotnet",
    "type": "process",
    "args": [
        "ef",
        "database",
        "update",
        "--project", "${workspaceFolder}/MyProj.Data/MyProj.Data.csproj",
        "--startup-project", "${workspaceFolder}/MyProj.Web"
    ],
    "problemMatcher": "$tsc"
}