.net web api应用遇到的一些问题

1、调用webapi接口时，碰到一种情况：

通过webapi调用接口时，返回的json数据，死活转换不成对象，转换的对象一直为null；

webapi端代码：

[HttpGet]
public string GetResponse()
{
      WordResponse response = new WordResponse();
      response.Result = false;
      response.PageNum = 12;
      return JsonHelper.ToJson(response);
}

    public static class JsonHelper
    {
        static readonly JavaScriptSerializer Serializer = new JavaScriptSerializer();

        /// <summary>
        /// 将一个对象转换成json格式字符串
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="t"></param>
        /// <returns></returns>
        public static string ToJson<T>(this T t)
        {
            return Serializer.Serialize(t);
        }

        /// <summary>
        /// 把对象转换为JSON字符串
        /// </summary>
        /// <param name="o">对象</param>
        /// <returns>JSON字符串</returns>
        public static string ToJSON(this object o)
        {
            if (o == null)
            {
                return null;
            }
            return JsonConvert.SerializeObject(o);
        }
        /// <summary>
        /// 把Json文本转为实体
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="input"></param>
        /// <returns></returns>
        public static T FromJSON<T>(this string input)
        {
            try
            {
                return JsonConvert.DeserializeObject<T>(input);
            }
            catch (Exception ex)
            {
                return default(T);
            }
        }
    }

接收端代码：

string serviceAddress = string.Format("http://192.168.168.152:9094/api/Word/GetResponse");
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(serviceAddress);
            request.Method = "GET";
            request.ContentType = "application/json;charset=UTF-8";
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream myResponseStream = response.GetResponseStream();
            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);
            string retString = myStreamReader.ReadToEnd();
            new SysLogInfoService().SysErrorLog("报告页数", "报告页数", retString);

            WordResponse wordResponse1 = JsonHelper.ToObject<WordResponse>(retString);

            WordResponse wordResponse = JsonTool.FromJSON<WordResponse>(retString);

最后发现，通过api返回json数据时，不要再转换为json，否则返回的json中会多一些斜线/，导致转换为对象失败，所以对象为空。

所以讲webapi接口代码改为：

        [HttpGet]
        public WordResponse GetResponse()
        {
            WordResponse response = new WordResponse();
            response.Result = false;
            response.PageNum = 12;
            return response;
        }

原因是，webapi接口，内置的已经会将返回的接口转换为json传输，并不需要自行转json，转完的对象相当于会再多一层引号，导致解析对象失败。