NetCore 操作配置文件

默认配置 appsettings.json

环境配置 launchSettings.json，即开发时运行配置

 

添加依赖

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Install-Package Microsoft.Extensions.Configuration Install-Package Microsoft.Extensions.Configuration.Binder Install-Package Microsoft.Extensions.Configuration.Json

 

 获取默认配置

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1	string sqlConn = builder.Configuration.GetConnectionString("Default")

 如：配置数据库连接字符串

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builder.Services.AddDbContext<Service.DataContext>(opt => {     opt.UseSqlServer(builder.Configuration.GetConnectionString("Default")); });

 

添加自定义JSON配置文件

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builder.Host.ConfigureAppConfiguration((hostingContext, config) => {     config.Sources.Clear();     config.AddJsonFile("redis.json", optional: false, reloadOnChange: true); });

 

配置文件帮助类

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/// <summary> /// 读取配置文件帮助类 /// 注册服务： builder.Services.AddSingleton(new AppSettings()); /// 使用示例： /// string data = AppSettings.ReadString(key); /// DataConfig dataConfig = AppSettings.ReadObject<DataConfig>(key); /// </summary> public class AppSettings {     #region 注入参数     /// <summary>     /// 配置文件     /// </summary>     private static IConfiguration? _config;     #endregion       #region 构造函数     /// <summary>     /// 构造函数     /// </summary>     /// <param name="configuration">配置文件</param>     public AppSettings()     {         _config = new ConfigurationBuilder()                 .AddJsonFile("appsettings.json", true, reloadOnChange: true)                 .Build();     }     #endregion       #region 静态方法     /// <summary>     /// 读取指定节点信息     /// </summary>     /// <param name="sessions">节点名称</param>     /// <returns></returns>     public static string ReadString(params string[] sessions)     {         try         {             if (_config != null && sessions.Any())             {                 string? str = _config[string.Join(":", sessions)];                 if (!string.IsNullOrEmpty(str))                 {                     return str;                 }             }         }         catch         {             return string.Empty;         }         return string.Empty;     }       /// <summary>     /// 读取实体信息     /// </summary>     /// <param name="sessions">节点名称</param>     /// <returns></returns>     public static T ReadObject<T>(params string[] sessions) where T : class, new()     {         T data = new();         try         {             if (_config != null && sessions.Any())             {                 _config.Bind(string.Join(":", sessions), data);             }         }         catch         {             return data;         }         return data;     }       /// <summary>     /// 读取实体数组信息     /// </summary>     /// <param name="sessions">节点名称</param>     /// <returns></returns>     public static List<T> ReadList<T>(params string[] sessions) where T : class     {         List<T> list = new();         try         {             if (_config != null && sessions.Any())             {                 _config.Bind(string.Join(":", sessions), list);             }         }         catch         {             return list;         }         return list;     }     #endregion }

 注册服务

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1 2	// 配置文件，放在第一句，并注册为Singleton builder.Services.AddSingleton(new AppSettings());

 使用示例

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1 2	string data = AppSettings.ReadString("key"); DataConfig dataConfig = AppSettings.ReadObject<DataConfig>("key");