C# dynamic json

对应普通对象，写个扩展方法，ToJson蛮方便。

但是 dynamic 类型就不行了，因为是运行时解析，只能转换为强类型 IDictionary<string, object> 才可以。

配置文件（Firebird）：

<configuration>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
  </startup>

  <connectionStrings>
    <add name="fb" connectionString="Server=localhost;User=SYSDBA;Password=1234;Database=wms;Dialect=3;ServerType=0;"/>
  </connectionStrings>
  
  <system.data>
    <DbProviderFactories>
      <remove invariant="FirebirdSql.Data.FirebirdClient" />
      <add name="FirebirdClient Data Provider" invariant="FirebirdSql.Data.FirebirdClient"
           description=".NET Framework Data Provider for Firebird"
           type="FirebirdSql.Data.FirebirdClient.FirebirdClientFactory, FirebirdSql.Data.FirebirdClient" />
    </DbProviderFactories>
  </system.data>
</configuration>

转换工具：

    static class JsonHelper
    {
        public static string ToJson(this object obj)
        {
            var str = JsonConvert.SerializeObject(obj, Formatting.Indented, new JsonSerializerSettings
            {
                NullValueHandling = NullValueHandling.Ignore,
                DateFormatString = "yyyy-MM-dd HH:mm:ss",
                ReferenceLoopHandling = ReferenceLoopHandling.Ignore//循环引用
            });
            return str;
        }

        public static T FromJson<T>(this string json) where T : class
        {
            return JsonConvert.DeserializeObject(json, typeof(T), new IsoDateTimeConverter
            {
                DateTimeFormat = "yyyy-MM-dd HH:mm:ss"
            }) as T;
        }
    }

Demo：

            var connectionString = ConfigurationManager.ConnectionStrings["fb"].ConnectionString;
            using (var db = new DbContext().ConnectionString(
                connectionString, 
                new DB2Provider(), 
                FirebirdSql.Data.FirebirdClient.FirebirdClientFactory.Instance))
            {
                List<dynamic> users = db.Sql(@"SELECT 
  M_USER.ID,
  M_USER.CODE,
  M_USER.PWD,
  M_USER.LABEL,
  M_USER.CRE_TIME
FROM
  M_USER
where id > @0").Parameters(20).QueryMany<dynamic>();

                foreach (var user in users)
                {
                    var tem = user as IDictionary<string, object>;
                    Console.WriteLine(tem.ToJson());
                }
            }

            Console.ReadLine();

效果：