如何将默认Web API 2更改为JSON格式化程序？

6 回答

• 14

  在_2685076中添加：

  config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/html"));
  

  回复于 2024-05-01T08:35:09+08:00
• 22

  我认为Web API只使用它可以在Formatters集合中找到的第一个格式化程序 . 您可以使用类似的方式更改排序

  GlobalConfiguration.Configuration.Formatters.Clear();
  GlobalConfiguration.Configuration.Formatters.Add(new JsonMediaTypeFormatter());
  GlobalConfiguration.Configuration.Formatters.Add(new XmlMediaTypeFormatter());
  

  但似乎默认情况下JSON格式化程序应该是第一个，因此您可能需要检查是否已在某处修改此集合 .

  回复于 2024-05-01T08:35:09+08:00
• 0

  我认为你应该改变如下 . Global.asax:

  /*For Indented formatting:*/       
   GlobalConfiguration.Configuration.Formatters.JsonFormatter.SerializerSettings.Formatting = Newtonsoft.Json.Formatting.Indented;
  
      /*Response as default json format
       * example (http://localhost:9090/WebApp/api/user/)
       */
      GlobalConfiguration.Configuration.Formatters.XmlFormatter.SupportedMediaTypes.Clear();
  
      /*Response as json format depend on request type
       * http://localhost:9090/WebApp/api/user/?type=json
       */
      GlobalConfiguration.Configuration.Formatters.JsonFormatter.MediaTypeMappings.Add(
      new QueryStringMapping("type", "json", new MediaTypeHeaderValue("application/json")));
  
      /*Response as xml format depend on request type
       * http://localhost:9090/WebApp/api/user/?type=xml
       */
      GlobalConfiguration.Configuration.Formatters.XmlFormatter.MediaTypeMappings.Add(
      new QueryStringMapping("type", "xml", new MediaTypeHeaderValue("application/xml")));
  

  回复于 2024-05-01T08:35:09+08:00
• 9

  或者只是删除XmlFormatter

  var formatters = GlobalConfiguration.Configuration.Formatters;
  formatters.Remove(formatters.XmlFormatter);
  

  回复于 2024-05-01T08:35:09+08:00
• 3

  上述答案都不适合我 . 问题是我从 GlobalConfiguration 获取格式化程序而不是 config 用 new HttpConfiguration() 创建的对象 . 这是适用于我的代码：

  public class WebApiConfig
  {
      public static HttpConfiguration Register()
      {
  
          var config = new HttpConfiguration();
          // This next line could stay if you want xml formatting
          config.Formatters.Remove(config.Formatters.XmlFormatter);
  
          // This next commented out line was causing the problem
          //var jsonFormatter = GlobalConfiguration.Configuration.Formatters.JsonFormatter;
  
          // This next line was the solution
          var jsonFormatter = config.Formatters.JsonFormatter;
          jsonFormatter.UseDataContractJsonSerializer = false; // defaults to false, but no harm done
          jsonFormatter.SerializerSettings.DateFormatHandling = DateFormatHandling.IsoDateFormat;
          jsonFormatter.SerializerSettings.Formatting = Formatting.None;
          jsonFormatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();           
  
          // remaining irrelevant code commented out
          return config;
      }
  }
  

  回复于 2024-05-01T08:35:09+08:00
• 5

  config.EnableSystemDiagnosticsTracing();
  
  GlobalConfiguration.Configuration.Formatters.XmlFormatter.SupportedMediaTypes.Clear();
  
  // Adding formatter for Json   
  config.Formatters.JsonFormatter.MediaTypeMappings.Add(new QueryStringMapping("type", "json", new MediaTypeHeaderValue("application/json")));
  
  // Adding formatter for XML   
  config.Formatters.XmlFormatter.MediaTypeMappings.Add(new QueryStringMapping("type", "xml", new MediaTypeHeaderValue("application/xml")));
  

  回复于 2024-05-01T08:35:09+08:00