问题描述
使用 DNX 运行我的 ASP.NET Core 应用程序，我能够从命令行设置环境变量，然后像这样运行它:
Running my ASP.NET Core application using DNX, I was able to set environment variables from the command line and then run it like this:
set ASPNET_ENV = Production
dnx web
在 1.0 中使用相同的方法:
Using the same approach in 1.0:
set ASPNETCORE_ENVIRONMENT = Production
dotnet run
不起作用 - 应用程序似乎无法读取环境变量.
does not work - the application does not seem to be able to read environment variables.
Console.WriteLine(Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT"));
返回空值
我错过了什么?
推荐答案
您的问题是 = 周围的空格.
Your problem is spaces around =.
这会起作用(在结束引用之前注意空格):
This will work (attention to space before closing quote):
Console.WriteLine(Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT "));
这段代码中ASPNETCORE_ENVIRONMENT后面的空格不是错字！问题中的问题是有额外的空间(在 SET... 中)，因此您必须在 GetEnvironmentVariable() 中使用相同的空间.
The space after ASPNETCORE_ENVIRONMENT in this code is not a typo! The problem in the question was having extra space (in SET...), so you must use the same space in GetEnvironmentVariable().
如 Isantipov 在评论中所述，更好的解决方案是从 SET 命令中完全删除空格:
As noted by Isantipov in a comment, an even better solution is to remove the spaces entirely from the SET command:
set ASPNETCORE_ENVIRONMENT=Production
这篇关于在 ASP.NET Core 中读取环境变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！