Ajax與asp.net aspx返回未定義

Question

我面臨以下問題：每當我點擊button時，alert顯示undefined。

Web方法：

[WebMethod] 
    public static string getTest() 
    { 
     return "testing success"; 
    } 

阿賈克斯腳本

<script type="text/javascript"> 
     function getTest() { 
      $.ajax({ 
       type: "POST", 
       url: "main.aspx/getTest", 
       data: "{}", 
       datatype: "json", 
       contenttype: "/application/json; charset=utf-8", 
       success: function (msg) { 

        alert(msg.d); 

       }, 
       error: function (data) { 
       } 
      }); 
     } 
    </script> 

Answer 1

datatype應該dataType和contenttype應該contentType。也從"/application/json; charset=utf-8"開始"/application/json; charset=utf-8"

$.ajax({ 
      type: "POST", 
      url: "main.aspx/getTest", 
      data: "{}", 
      dataType: "json", 
      contentType: "application/json; charset=utf-8", 
      success: function (msg) { 

       alert(msg.d); 

      }, 
      error: function (data) { 
      } 
     }); 

Answer 2

從Ajax調用

datatype: "json", 
contenttype: "/application/json; charset=utf-8", 

更多關於這些

刪除這些點

Differences between contentType and dataType in jQuery ajax function

What is content-type and datatype in an AJAX request?

你可以找到更多的細節在jQuery Ajax documentation