A:全局Common的公共定义

Common/Configuration/ConfigLoader.cs

@@ -0,0 +1,34 @@
+using Microsoft.Extensions.Configuration;
+
+namespace Common.Configuration;
+
+public static class ConfigLoader
+{
+    private static readonly object _lock = new();
+    private static AppConfig _config;
+
+    public static AppConfig Config
+    {
+        get
+        {
+            if (_config == null)
+            {
+                lock (_lock)
+                {
+                    if (_config == null)
+                    {
+                        var builder = new ConfigurationBuilder()
+                            .SetBasePath(AppContext.BaseDirectory)
+                            .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);
+
+                        IConfiguration configuration = builder.Build();
+
+                        // _config = new AppConfig();
+                        configuration.GetSection("AppSettings").Bind(_config);
+                    }
+                }
+            }
+            return _config;
+        }
+    }
+}

Common/Configuration/ConfigReader.cs

@@ -0,0 +1,29 @@
+using Microsoft.Extensions.Configuration;
+
+namespace Common.Configuration;
+
+public static class ConfigReader
+{
+    public static AppConfigModel LoadConfig()
+    {
+        var env = Environment.GetEnvironmentVariable("DOTNET_ENVIRONMENT") ?? "Production";
+        var builder = new ConfigurationBuilder()
+            .SetBasePath(AppContext.BaseDirectory)
+            .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
+            .AddJsonFile($"appsettings.{env}.json", optional: true, reloadOnChange: true);
+
+        IConfiguration config = builder.Build();
+
+        var model = new AppConfigModel();
+        config.GetSection("AppSettings").Bind(model);
+        return model;
+    }
+}
+
+// 可单独定义模型类用于绑定
+public class AppConfigModel
+{
+    public string AppName { get; set; }
+    public string Version { get; set; }
+    public int MaxConnection { get; set; }
+}