在 .NET Core 2.0 中设置环境变量
Setting environment variables in .NET Core 2.0
我正在尝试在我的 .NET Core 2.0 应用程序中设置多个环境。请参阅下面的代码。
配置文件（Launch.JSON）
"configurations": [
{
"name": ".NET Core Launch (web)",
"type": "coreclr",
"request": "launch",
"preLaunchTask": "build",
// If you have changed target frameworks, make sure to update the program path.
"program": "${workspaceRoot}/my.api/bin/Debug/netcoreapp2.0/my.api.dll",
"args": [],
"cwd": "${workspaceRoot}/my.api",
"stopAtEntry": false,
"requireExactSource": false,
"internalConsoleOptions": "openOnSessionStart",
"launchBrowser": {
"enabled": true,
"args": "${auto-detect-url}",
"windows": {
"command": "cmd.exe",
"args": "/C start ${auto-detect-url}"
},
"osx": {
"command": "open"
},
"linux": {
"command": "xdg-open"
}
},
"env": {
"ASPNETCORE_ENVIRONMENT": "Development"
},
"sourceFileMap": {
"/Views": "${workspaceRoot}/Views"
}
},
{
"name": ".NET Core Attach",
"type": "coreclr",
"request": "attach",
"processId": "${command:pickProcess}"
}
]
Program.cs
public class Program
{
public static void Main(string[] args)
{
BuildWebHost(args).Run();
}
public static IWebHost BuildWebHost(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>()
.Build();
}
StartUp.cs
public class Startup
{
public IContainer ApplicationContainer { get; private set; }
private IHostingEnvironment HostingEnvironment { get; set; }
public IConfigurationRoot Configuration { get; }
private string ConnectionString
{
get
{
return this.HostingEnvironment.IsDevelopment() ? Configuration.GetConnectionString("DefaultConnection") : Configuration.GetConnectionString("Production");
}
}
public Startup(IHostingEnvironment env)
{
var builder = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.AddJsonFile($"appsettings.Development.json", optional: true, reloadOnChange: true)
.AddJsonFile($"appsettings.Azuredev.json", optional: true, reloadOnChange: true)
.AddEnvironmentVariables();
Configuration = builder.Build();
this.HostingEnvironment = env;
System.Console.WriteLine(env.EnvironmentName); // Here it always give me Production.
}
我的问题
我尝试使用像 dotnet 运行 --environment "Development"
这样的命令行
因此，它应该 运行 在 开发环境 上，但它总是 运行 与 生产环境 ， （看，我在 startup.cs 文件中添加了 console.writeline）
现在奇怪的是，如果我使用 F5 进行调试，那么它 运行 与 开发 环境完美结合.
dotnet run --environment 对 ASPNETCORE_ENVIRONMENT 环境变量没有影响，参见 this issue。
这里有一个关于如何以多种方式切换环境的详细说明：https://docs.microsoft.com/en-us/aspnet/core/fundamentals/environments
例如，您可以从命令行 运行 它（在 dotnet run 之前）：set ASPNETCORE_ENVIRONMENT=Development
您可以更新 launchsettings.json 以包含 'Development' 个人资料，然后 运行:
dotnet run --launch-profile "Development"
有关 launchSettings.json 文件配置的更多详细信息，请参阅 Working with multiple environments
请注意，commandName 可能需要是 "Project"（我还没有真正尝试过这么多）。例子launchSettings.json如下：
{
"iisSettings": {
"windowsAuthentication": false,
"anonymousAuthentication": true,
"iisExpress": {
"applicationUrl": "http://localhost:19882/",
"sslPort": 0
}
},
"profiles": {
"Development": {
"commandName": "Project",
"launchBrowser": true,
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
}
}
}
}
我终于做到了...
让我们看看我是如何做到的。
- 我已经在 launchSettings.JSON
中添加了我所有的配置文件设置
- Program.cs 与我在问题中添加的内容相同。
- 已更新 startup.cs（见下文）
- CLI for 运行 它通过终端也不同。
现在先来看看我的项目结构。
我的代码 launchSettings.json
{
"iisSettings": {
"windowsAuthentication": false,
"anonymousAuthentication": true,
"iisExpress": {
"applicationUrl": "http://localhost:40088/",
"sslPort": 0
}
},
"profiles": {
"Development": {
"commandName": "Project",
"launchBrowser": true,
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
}
},
"Azuredev": {
"commandName": "Project",
"launchBrowser": true,
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Azuredev"
}
}
}
}
launch.json
中的代码
{
"version": "0.2.0",
"configurations": [
{
"name": ".NET Core Launch (web)",
"type": "coreclr",
"request": "launch",
"preLaunchTask": "build",
// If you have changed target frameworks, make sure to update the program path.
"program": "${workspaceRoot}/my.api/bin/Debug/netcoreapp2.0/my.api.dll",
"args": [],
"cwd": "${workspaceRoot}/my.api",
"stopAtEntry": false,
"requireExactSource": false,
"internalConsoleOptions": "openOnSessionStart",
"launchBrowser": {
"enabled": true,
"args": "${auto-detect-url}",
"windows": {
"command": "cmd.exe",
"args": "/C start ${auto-detect-url}"
},
"osx": {
"command": "open"
},
"linux": {
"command": "xdg-open"
}
},
"sourceFileMap": {
"/Views": "${workspaceRoot}/Views"
}
},
{
"name": ".NET Core Attach",
"type": "coreclr",
"request": "attach",
"processId": "${command:pickProcess}"
}
]
}
startup.cs
public IConfigurationRoot Configuration { get; }
public Startup(IHostingEnvironment env)
{
var builder = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true, reloadOnChange: true)
.AddEnvironmentVariables();
Configuration = builder.Build();
this.HostingEnvironment = env;
}
在这一切发生变化之后，我的 API 在 F5 调试选项和 CLI 终端下都可以正常工作。
要从命令行启动应用程序，请使用这些关键字：
dotnet run --launch-profile "Development"
或
dotnet run --launch-profile "Azuredev"
对于.NET Core 3.1，正好需要添加：
.AddCommandLine(args)
到 Program.cs
中的 ConfigurationBuilder
为了
dotnet run --environment "Development"
开始工作（切换 ASP.NET 核心环境）。
打开电源shell，到达项目位置
首先使用命令设置环境变量
$Env:ASPNETCORE_ENVIRONMENT = "Qa"
运行 电源申请 shell
dotnet 运行 --no-launch-profile
我正在尝试在我的 .NET Core 2.0 应用程序中设置多个环境。请参阅下面的代码。
配置文件（Launch.JSON）
"configurations": [
{
"name": ".NET Core Launch (web)",
"type": "coreclr",
"request": "launch",
"preLaunchTask": "build",
// If you have changed target frameworks, make sure to update the program path.
"program": "${workspaceRoot}/my.api/bin/Debug/netcoreapp2.0/my.api.dll",
"args": [],
"cwd": "${workspaceRoot}/my.api",
"stopAtEntry": false,
"requireExactSource": false,
"internalConsoleOptions": "openOnSessionStart",
"launchBrowser": {
"enabled": true,
"args": "${auto-detect-url}",
"windows": {
"command": "cmd.exe",
"args": "/C start ${auto-detect-url}"
},
"osx": {
"command": "open"
},
"linux": {
"command": "xdg-open"
}
},
"env": {
"ASPNETCORE_ENVIRONMENT": "Development"
},
"sourceFileMap": {
"/Views": "${workspaceRoot}/Views"
}
},
{
"name": ".NET Core Attach",
"type": "coreclr",
"request": "attach",
"processId": "${command:pickProcess}"
}
]
Program.cs
public class Program
{
public static void Main(string[] args)
{
BuildWebHost(args).Run();
}
public static IWebHost BuildWebHost(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>()
.Build();
}
StartUp.cs
public class Startup
{
public IContainer ApplicationContainer { get; private set; }
private IHostingEnvironment HostingEnvironment { get; set; }
public IConfigurationRoot Configuration { get; }
private string ConnectionString
{
get
{
return this.HostingEnvironment.IsDevelopment() ? Configuration.GetConnectionString("DefaultConnection") : Configuration.GetConnectionString("Production");
}
}
public Startup(IHostingEnvironment env)
{
var builder = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.AddJsonFile($"appsettings.Development.json", optional: true, reloadOnChange: true)
.AddJsonFile($"appsettings.Azuredev.json", optional: true, reloadOnChange: true)
.AddEnvironmentVariables();
Configuration = builder.Build();
this.HostingEnvironment = env;
System.Console.WriteLine(env.EnvironmentName); // Here it always give me Production.
}
我的问题
我尝试使用像 dotnet 运行 --environment "Development"
这样的命令行因此，它应该 运行 在 开发环境 上，但它总是 运行 与 生产环境 ， （看，我在 startup.cs 文件中添加了 console.writeline）
现在奇怪的是，如果我使用 F5 进行调试，那么它 运行 与 开发 环境完美结合.
dotnet run --environment 对 ASPNETCORE_ENVIRONMENT 环境变量没有影响，参见 this issue。
这里有一个关于如何以多种方式切换环境的详细说明：https://docs.microsoft.com/en-us/aspnet/core/fundamentals/environments
例如，您可以从命令行 运行 它（在 dotnet run 之前）：set ASPNETCORE_ENVIRONMENT=Development
您可以更新 launchsettings.json 以包含 'Development' 个人资料，然后 运行:
dotnet run --launch-profile "Development"
有关 launchSettings.json 文件配置的更多详细信息，请参阅 Working with multiple environments
请注意，commandName 可能需要是 "Project"（我还没有真正尝试过这么多）。例子launchSettings.json如下：
{
"iisSettings": {
"windowsAuthentication": false,
"anonymousAuthentication": true,
"iisExpress": {
"applicationUrl": "http://localhost:19882/",
"sslPort": 0
}
},
"profiles": {
"Development": {
"commandName": "Project",
"launchBrowser": true,
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
}
}
}
}
我终于做到了...
让我们看看我是如何做到的。
- 我已经在 launchSettings.JSON 中添加了我所有的配置文件设置
- Program.cs 与我在问题中添加的内容相同。
- 已更新 startup.cs（见下文）
- CLI for 运行 它通过终端也不同。
现在先来看看我的项目结构。
我的代码 launchSettings.json
{
"iisSettings": {
"windowsAuthentication": false,
"anonymousAuthentication": true,
"iisExpress": {
"applicationUrl": "http://localhost:40088/",
"sslPort": 0
}
},
"profiles": {
"Development": {
"commandName": "Project",
"launchBrowser": true,
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
}
},
"Azuredev": {
"commandName": "Project",
"launchBrowser": true,
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Azuredev"
}
}
}
}
launch.json
中的代码{
"version": "0.2.0",
"configurations": [
{
"name": ".NET Core Launch (web)",
"type": "coreclr",
"request": "launch",
"preLaunchTask": "build",
// If you have changed target frameworks, make sure to update the program path.
"program": "${workspaceRoot}/my.api/bin/Debug/netcoreapp2.0/my.api.dll",
"args": [],
"cwd": "${workspaceRoot}/my.api",
"stopAtEntry": false,
"requireExactSource": false,
"internalConsoleOptions": "openOnSessionStart",
"launchBrowser": {
"enabled": true,
"args": "${auto-detect-url}",
"windows": {
"command": "cmd.exe",
"args": "/C start ${auto-detect-url}"
},
"osx": {
"command": "open"
},
"linux": {
"command": "xdg-open"
}
},
"sourceFileMap": {
"/Views": "${workspaceRoot}/Views"
}
},
{
"name": ".NET Core Attach",
"type": "coreclr",
"request": "attach",
"processId": "${command:pickProcess}"
}
]
}
startup.cs
public IConfigurationRoot Configuration { get; }
public Startup(IHostingEnvironment env)
{
var builder = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true, reloadOnChange: true)
.AddEnvironmentVariables();
Configuration = builder.Build();
this.HostingEnvironment = env;
}
在这一切发生变化之后，我的 API 在 F5 调试选项和 CLI 终端下都可以正常工作。
要从命令行启动应用程序，请使用这些关键字：
dotnet run --launch-profile "Development"
或
dotnet run --launch-profile "Azuredev"
对于.NET Core 3.1，正好需要添加：
.AddCommandLine(args)
到 Program.cs
中的 ConfigurationBuilder为了
dotnet run --environment "Development"
开始工作（切换 ASP.NET 核心环境）。
打开电源shell，到达项目位置
首先使用命令设置环境变量
$Env:ASPNETCORE_ENVIRONMENT = "Qa"
运行 电源申请 shell dotnet 运行 --no-launch-profile