如何更改更新数据库ef迁移的连接字符串?:How do I change connection string for Update-Database ef migrations?

我正在尝试运行Update-Database，并且我想指定连接字符串，但是CLI在寻找错误的字符串.我的appsettings.json文件中有两个连接字符串:

I am trying to run Update-Database, and I would like to specify the connection string, but the CLI is looking at the wrong one. There are two connection strings in my appsettings.json file:

{ "Logging": { "IncludeScopes": false, "LogLevel": { "Default": "Warning" } }, "ConnectionStrings": { "LocalWindows": "data source=.\\SQLEXPRESS;initial catalog=Intranet;persist security info=True;integrated security=true;", "AzureDevelopment": "Server=tcp:en..." } } 

当我运行Update-Database时，AzureDevelopment始终是它使用的键.因此，如果我将LocalWindows连接字符串复制到AzureDevelopment的值，它将更新正确的数据库.此外，如果我删除AzureDevelopment却像这样离开LocalWindows:

When I run Update-Database, AzureDevelopment is always the key it uses. So if I copy the LocalWindows connectionstring to AzureDevelopment's value, it updates the correct database. Furthermore, if I delete AzureDevelopment but leave LocalWindows like this:

{ "Logging": { "IncludeScopes": false, "LogLevel": { "Default": "Warning" } }, "ConnectionStrings": { "LocalWindows": "data source=.\\SQLEXPRESS;initial catalog=Intranet;persist security info=True;integrated security=true;" } } 

我得到:

Value cannot be null. Parameter name: connectionString 

因此，似乎在某些时候，CLI选择使用AzureDevelopment字符串，并且我无法再更改键或提供连接字符串作为参数.

So it seems at some point, the CLI chose to use the AzureDevelopment string, and I can no longer change the key or supply the connection string as an argument.

我的问题是，迁移CLI如何知道要使用的连接字符串?它是通过启动设置上的反射魔术来检测字符串还是什么?我在网上看到的所有信息是如何在运行Update-Database时指定项目.CLI曾经有-ConnectionString和-ConnectionStringName参数，但是这些参数不再可用.

My question is how does the migrations CLI know what connection string to use? Is it detecting the string through some reflection magic on the startup settings or what? All I see online is how to specify the project when running Update-Database. There used to be -ConnectionString and -ConnectionStringName parameters for the CLI, but those are no longer available.

问题解答

我要做的就是在PowerShell中执行以下操作:

All I had to do was the following in PowerShell:

$ env:ASPNETCORE_ENVIRONMENT ='LocalWindows'dotnet ef数据库更新

或

$ env:ASPNETCORE_ENVIRONMENT ='LocalWindows'更新数据库

使用 Update-Database -verbose 启用详细信息还会在输出中显示环境，以确保其达到正确的环境.

Turning on verbose with Update-Database -verbose also shows you the environment in the output to make sure it's hitting the correct one.

什么不起作用:

• 在Windows中设置全局ASPNETCORE_ENVIRONMENT环境变量
• 在项目"->设置"->调试"屏幕中设置ASPNETCORE_ENVIRONMENT环境变量

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