silverlight: http请求的GET及POST示例

http请求的get/post并不是难事，只是silverlight中一切皆是异步，所以代码看起来就显得有些冗长了，下面这个HttpHelper是在总结 园友 的基础上，修改得来：

 1 namespace SLAwb.Helper
 2 {
 3     public sealed class MediaType
 4     {
 5         /// <summary>
 6         /// "application/xml"
 7         /// </summary>
 8         public const string APPLICATION_XML = "application/xml";
 9 
10         /// <summary>
11         /// application/json
12         /// </summary>
13         public const string APPLICATION_JSON = "application/json";
14 
15         /// <summary>
16         /// "application/x-www-form-urlencoded"
17         /// </summary>
18         public const string APPLICATION_FORM_URLENCODED = "application/x-www-form-urlencoded";
19      
20     }
21 }

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