c#读取json文件操作json文件

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using Microsoft.Extensions.Configuration; using System; using System.Collections.Generic; using System.IO; using Newtonsoft.Json; using Newtonsoft.Json.Linq; using Newtonsoft.Json.Converters;   namespace Config {     public class Configs     {         public static string GetConnectionValue(string Config)         {             //手动读取配置             ConfigurationBuilder configBuilder = new ConfigurationBuilder();             configBuilder.AddJsonFile(GetAbsolutePath("config/sqlserver.json"), optional: false, reloadOnChange: false);             IConfigurationRoot config = configBuilder.Build();             return config.GetSection("connectionStrings:"+Config).Value;         }           public static string GetConfigSettingsValue(string Key, string KeyTxt)         {             //手动读取配置             ConfigurationBuilder configBuilder = new ConfigurationBuilder();             configBuilder.AddJsonFile(GetAbsolutePath("config/settings.json"), optional: false, reloadOnChange: false);             IConfigurationRoot config = configBuilder.Build();               return KeyTxt!="" ? config.GetSection(Key+":"+KeyTxt).Value : config.GetSection(Key).Value;         }           #region 扩展         /// <summary>         /// 获取文件的绝对路径,针对window程序和web程序都可使用         /// </summary>         /// <param name="relativePath">相对路径地址</param>         /// <returns>绝对路径地址</returns>         public static string GetAbsolutePath(string relativePath)         {             string path = Directory.GetCurrentDirectory();             IConfigurationRoot configuration = new ConfigurationBuilder().SetBasePath(path).AddJsonFile("appsettings.json").Build();               if (string.IsNullOrEmpty(relativePath))             {                 return "";             }             relativePath = relativePath.Replace("/", "\\");             if (relativePath[0] == '\\')             {                 relativePath = relativePath.Remove(0, 1);             }             //使用path获取当前应用程序集的执行目录的上级的上级目录               string dir = ToBool(configuration["Debug"]) ? Path.GetFullPath("../../../") : path;               return Path.Combine(dir, relativePath);         }           public static bool SaveJson(Dictionary<string, object> sectionInfo, string configFileName)         {             if (sectionInfo.Count==0)                 return false;               try             {                 var filePath = GetAbsolutePath(configFileName);                 JObject jsonObject;                   if (File.Exists(filePath))                 {                     using (StreamReader file = new StreamReader(filePath))                     {                         using (JsonTextReader reader = new JsonTextReader(file))                         {                             jsonObject = JObject.Parse(ToJson(JToken.ReadFrom(reader)));                         }                     }                 }                 else                 {                     jsonObject = new JObject();                 }                   foreach (var key in sectionInfo.Keys)                 {                     jsonObject[key] = JObject.FromObject(sectionInfo[key]);                 }                   using (var writer = new StreamWriter(filePath))                 using (JsonTextWriter jsonwriter = new JsonTextWriter(writer)                 {                     Formatting = Formatting.Indented,//格式化缩进                     Indentation = 4,  //缩进四个字符                     IndentChar = ' '  //缩进的字符是空格                 })                 {                     jsonObject.WriteTo(jsonwriter);                     return true;                 }             }             catch (Exception)             {                 return false;             }         }         #endregion           #region ToBool           /// <summary>         /// 转换为布尔值         /// </summary>         /// <param name="data">数据</param>         public static bool ToBool(object data)         {             if (data == null)                 return false;             bool? value = GetBool(data);             if (value != null)                 return value.Value;             bool result;             return bool.TryParse(data.ToString(), out result) && result;         }           /// <summary>         /// 获取布尔值         /// </summary>         /// <param name="data">数据</param>         /// <returns></returns>         private static bool? GetBool(object data)         {             switch (data.ToString().Trim().ToLower())             {                 case "0":                     return false;                 case "1":                     return true;                 case "是":                     return true;                 case "否":                     return false;                 case "yes":                     return true;                 case "no":                     return false;                 default:                     return null;             }         }           #endregion         #region ToJson         /// <summary>         /// 转成json字串         /// </summary>         /// <param name="obj">对象</param>         /// <returns></returns>         public static string ToJson(object obj)         {             IsoDateTimeConverter timeConverter = new IsoDateTimeConverter { DateTimeFormat = "yyyy-MM-dd HH:mm:ss" };             return JsonConvert.SerializeObject(obj, timeConverter);         }         #endregion     } }