如何列出 ASP.NET Core 中的所有配置源或属性？

Question

我想确保正在从配置源读取特定配置属性。我打算打印出所有配置源（或打印出所有配置属性），但我似乎不知道该怎么做。

这可以做到吗？

Answer 1

您可以通过以下操作获取所有配置源发现的所有密钥的列表：

var keys = builder.Build().AsEnumerable().ToList();

我还没有找到单独构建每个配置源的方法，因此您可以单独查看源。

在调试模式下，您可以看到私有成员并查看每个配置源：

Answer 2

从 .NET Core 3.0+ 开始，您可以将 IConfiguration 转换为 IConfigurationRoot 并使用 GetDebugView 扩展方法。这将生成一个人类可读的配置视图，显示每个值的来源。例如

var root = (IConfigurationRoot)Configuration;
var debugView = root.GetDebugView();

示例输出到 debugView:

applicationName=Project.Name (Microsoft.Extensions.Configuration.ChainedConfigurationProvider)
ASPNETCORE_ENVIRONMENT=Development (EnvironmentVariablesConfigurationProvider)
ASPNETCORE_HTTPS_PORT=32774 (EnvironmentVariablesConfigurationProvider)
ASPNETCORE_LOGGING:
  CONSOLE:
    DISABLECOLORS=true (EnvironmentVariablesConfigurationProvider)
ASPNETCORE_URLS=https://+:443;http://+:80 (EnvironmentVariablesConfigurationProvider)
DOTNET_RUNNING_IN_CONTAINER=true (EnvironmentVariablesConfigurationProvider)
DOTNET_USE_POLLING_FILE_WATCHER=1 (EnvironmentVariablesConfigurationProvider)
AllowedHosts=* (JsonConfigurationProvider for 'appsettings.json' (Required))
Kestrel:
  Certificates:
    Development:
      Password=xxxxxxxx-xxxxx-xxxx-xxxx-xxxxxxxxxx (JsonConfigurationProvider for 'secrets.json' (Optional))
EmailOptions:
  EnableSsl=False (JsonConfigurationProvider for 'appsettings.json' (Required))
ENVIRONMENT=Development (Microsoft.Extensions.Configuration.ChainedConfigurationProvider)
HOME=/root (EnvironmentVariablesConfigurationProvider)
HOSTNAME=2cb0f5c24cc0 (EnvironmentVariablesConfigurationProvider)
HTTPS_PORT=32774 (Microsoft.Extensions.Configuration.ChainedConfigurationProvider)
NUGET_FALLBACK_PACKAGES=/root/.nuget/fallbackpackages;/root/.nuget/fallbackpackages2 (EnvironmentVariablesConfigurationProvider)
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin (EnvironmentVariablesConfigurationProvider)
PWD=/app (EnvironmentVariablesConfigurationProvider)
RUNNING_IN_CONTAINER=true (Microsoft.Extensions.Configuration.ChainedConfigurationProvider)
URLS=https://+:443;http://+:80 (Microsoft.Extensions.Configuration.ChainedConfigurationProvider)
USE_POLLING_FILE_WATCHER=1 (Microsoft.Extensions.Configuration.ChainedConfigurationProvider)

Answer 3

最近，我也遇到了类似的问题。我在这里找到了任务的解决方案： https://github.com/Wallsmedia/DotNetCore.Configuration.Formatter

    public static List<string> AllConfigurationKeys(this IConfigurationRoot root)
    {
        (string Value, IConfigurationProvider Provider) GetValueAndProvider(
                                                            IConfigurationRoot root,
                                                            string key)
        {
            foreach (IConfigurationProvider provider in root.Providers.Reverse())
            {
                if (provider.TryGet(key, out string value))
                {
                    return (value, provider);
                }
            }

            return (null, null);
        }

        void RecurseChildren(
                HashSet<string> keys,
                IEnumerable<IConfigurationSection> children, string rootPath)
        {
            foreach (IConfigurationSection child in children)
            {
                (string Value, IConfigurationProvider Provider) valueAndProvider = GetValueAndProvider(root, child.Path);

                if (valueAndProvider.Provider != null)
                {
                    keys.Add(rootPath + ":" + child.Key);
                }

                RecurseChildren(keys, child.GetChildren(), child.Path);
            }
        }

        var keys = new HashSet<string>();
        RecurseChildren(keys, root.GetChildren(), "");
        return keys.ToList();
    }

如何列出 ASP.NET Core 中的所有配置源或属性？

How can I list all of the configuration sources or properties in ASP.NET Core?

.net

c#

asp.net

.net-core

asp.net-core