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DH.Commons/Helper/SystemConfigHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DH.Commons.Helper
+{
+    /// <summary>
+    /// 配置文件操作工具类（自动定位主程序配置）
+    /// </summary>
+    public static class SystemConfigHelper
+    {
+        private static Configuration _mainConfig;
+        private static readonly object _lock = new object();
+
+        /// <summary>
+        /// 获取主程序配置对象
+        /// </summary>
+        private static Configuration MainConfiguration
+        {
+            get
+            {
+                if (_mainConfig == null)
+                {
+                    lock (_lock)
+                    {
+                        if (_mainConfig == null)
+                        {
+                            // 获取主程序路径
+                            string exePath = Assembly.GetEntryAssembly().Location;
+                            var configFile = exePath + ".config";
+
+                            // 加载主程序配置
+                            var fileMap = new ExeConfigurationFileMap
+                            {
+                                ExeConfigFilename = configFile
+                            };
+                            _mainConfig = ConfigurationManager.OpenMappedExeConfiguration(
+                                fileMap,
+                                ConfigurationUserLevel.None
+                            );
+                        }
+                    }
+                }
+                return _mainConfig;
+            }
+        }
+
+        /// <summary>
+        /// 检查配置项是否存在
+        /// </summary>
+        public static bool KeyExists(string key)
+        {
+            return MainConfiguration.AppSettings.Settings[key] != null;
+        }
+
+        /// <summary>
+        /// 读取配置项（带类型自动转换）
+        /// </summary>
+        public static T GetValue<T>(string key, T defaultValue = default)
+        {
+            try
+            {
+                var setting = MainConfiguration.AppSettings.Settings[key];
+                if (setting == null) return defaultValue;
+
+                return (T)Convert.ChangeType(setting.Value, typeof(T));
+            }
+            catch
+            {
+                return defaultValue;
+            }
+        }
+
+        /// <summary>
+        /// 写入配置项（自动保存）
+        /// </summary>
+        public static void SetValue(string key, object value)
+        {
+            var settings = MainConfiguration.AppSettings.Settings;
+            var stringValue = value?.ToString() ?? string.Empty;
+
+            if (settings[key] == null)
+            {
+                settings.Add(key, stringValue);
+            }
+            else
+            {
+                settings[key].Value = stringValue;
+            }
+
+            SaveChanges();
+        }
+
+        /// <summary>
+        /// 删除指定配置项
+        /// </summary>
+        public static void RemoveKey(string key)
+        {
+            if (KeyExists(key))
+            {
+                MainConfiguration.AppSettings.Settings.Remove(key);
+                SaveChanges();
+            }
+        }
+
+        /// <summary>
+        /// 保存配置修改
+        /// </summary>
+        private static void SaveChanges()
+        {
+            MainConfiguration.Save(ConfigurationSaveMode.Modified);
+            ConfigurationManager.RefreshSection("appSettings");
+        }
+    }
+
+}