c# - MVC 核心集 IHostingEnvironment 开发

Question

如何手动将 IhostingEnvironment 环境设置为开发环境？我想使用 C# 代码来执行此操作，而不是命令行。

谢谢，

   public Startup(IHostingEnvironment env)
    {
        var builder = new ConfigurationBuilder();

        if (env.IsDevelopment())
        {

Answer 1

您可以在 Startup 方法中将 env.EnvironmentName 设置为“Development”。

public Startup(IHostingEnvironment env)
{
    var builder = new ConfigurationBuilder();
    env.EnvironmentName = "Development";  // <- Set the EnvironmentName to "Development"

    if (env.IsDevelopment())
    {

如果您在 here 处看到 IsDevelopment 方法的实现(github 存储库)，您会发现它基于 EnvironmentName 的字符串比较操作工作。

    public static bool IsDevelopment(this IHostingEnvironment hostingEnvironment)
    {
        if (hostingEnvironment == null)
        {
            throw new ArgumentNullException(nameof(hostingEnvironment));
        }

        return hostingEnvironment.IsEnvironment(EnvironmentName.Development);
    }


    public static bool IsEnvironment(
        this IHostingEnvironment hostingEnvironment,
        string environmentName)
    {
        if (hostingEnvironment == null)
        {
            throw new ArgumentNullException(nameof(hostingEnvironment));
        }

        return string.Equals(
            hostingEnvironment.EnvironmentName,
            environmentName,
            StringComparison.OrdinalIgnoreCase);
    }