Fiddler進行模擬Post提交json數據，總爲null解決方式

Request Headers:

User-Agent: Fiddler
Host: localhost:3248
Content-Type: application/json; charset=utf-8  
Content-Length: 63

要加上Content-Type: application/json; charset=utf-8，要不是JSON沒效

Request Body

{"UserID":4,"UserName":"Parry","UserEmail":"Parry@cnblogs.com"}

緊記，不要寫成這樣：[{"UserID":4,"UserName":"Parry","UserEmail":"Parry@cnblogs.com"}]