WebService实现Json格式数据返回

WebService默认返回格式是XML，当希望返回Json格式数据时，需要从上下文进行数据输出。

  /// 

  /// 查询数据
  /// 
  /// 
  /// 
  [WebMethod(Description = "查询数据")]
  public void GetData(string Id)
  {
      Context.Response.Charset = "GB2312"; //设置字符集类型  
      Context.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
      Context.Response.ContentType = "application/json";
      try
      {
          string result = MyDataResultMethod(Id);
          
          Context.Response.Write(result);
      }
      catch (Exception ex)
      {
          Context.Response.Write($"服务异常：{ex.Message}");
      }
      Context.Response.End();
  }
  

Json序列化忽略为空字段序列

  Object obj=new Object();
  JsonSerializerSettings sett = new JsonSerializerSettings();
  sett.NullValueHandling = NullValueHandling.Ignore;//忽略Null值字段
  string result=JsonConvert.SerializeObject(obj, Formatting.Indented, sett);
 

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