c# MVC返回小驼峰Json(首字母小写)

1.与前端交互时,前端总希望传过去的json字段名首字母小写,但是.net规范是首字线大写

如果就写了下面的转换方法

/// <summary>

        /// Poco类字段名转换成首字母小写的字典

        /// 用于 MVC 的 new JsonResult(){Data=xxx} 后前端Javascript使用

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="obj"></param>

        /// <returns></returns>

        public static dynamic PocoToFirstCharLowerJsonResultData<T>(this T obj) where T : class

        {

            var objJson = obj.ToJson();

            var dict = objJson.ToInstance<Dictionary<string, object>>();

            return dict.ToDictionary(p => p.Key[].ToString().ToLower() + p.Key.Substring(), p => p.Value);

        }

        /// <summary>

        /// 普通类字段名转换成首字母小写的字典

        /// 用于 MVC 的 new JsonResult(){Data=xxx} 后前端Javascript使用

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="obj"></param>

        /// <returns></returns>

        public static dynamic ToFirstCharLowerJsonResultData<T>(this T obj) where T : class

        {

            var objJson = obj.ToJson();

            var rx = new Regex(@"""(?<v>(\w)*?)"":", RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.Singleline);

            var match = rx.Match(objJson);

            while (match.Success)

            {

                var originalKeyName = match.Result("${v}");

                var currentKeyName = originalKeyName[].ToString().ToLower() + originalKeyName.Substring();

                objJson = rx.Replace(objJson, "\"" + currentKeyName + "\":", , match.Index);

                match = match.NextMatch();

            }

            var dict = objJson.ToInstance<Dictionary<string, object>>();

            return dict.ToDictionary(p => p.Key[].ToString().ToLower() + p.Key.Substring(), p => p.Value);

        }

2.Controller调用如下

 public ActionResult QueryAllModels()

        {

            var response = this.Service.QueryModels();

            return new JsonResult(){Data=response .ToFirstCharLowerJsonResultData()};

        }

3.另一种实现,用 Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver

/// <summary>

    /// JsonResult,驼峰式转换

    /// </summary>

    public class LowerCamelJsonResult : ActionResult

    {

        /// <summary>

        /// 目标对象

        /// </summary>

        public object Data { get; set; }

        /// <summary>

        /// 构造器

        /// </summary>

        public LowerCamelJsonResult() { }

        /// <summary>

        /// 构造器

        /// </summary>

        public LowerCamelJsonResult(object data)

        {

            this.Data = data;

        }

        /// <summary>

        /// 重写执行结果

        /// </summary>

        /// <param name="context"></param>

        public override void ExecuteResult(ControllerContext context)

        {

            if (context == null)

            {

                throw new ArgumentNullException("context");

            }

            //json对象命名小驼峰式转换

            var json = JsonConvert.SerializeObject(

                this.Data,

                Formatting.Indented,

                new JsonSerializerSettings { ContractResolver = new Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver() }

                );

            context.HttpContext.Response.Write(json);

        }

    }

调用方法

 public ActionResult QueryAllModels()

        {

            var response = this.Service.QueryModels();

            return new LowerCamelJsonResult(){Data=response };

        }