如何从webservice返回JSON

Question

早上，

我需要从我的web服务返回一条消息。下面是我的代码示例，并且我返回一个字符串。

[web method] 
public string CheckFeedSubmission() 
    { 
     string responseText = ""; 
     try 
     { 
      //Stuff goes here 
      responseText = "It Worked!" 
     } 
     catch (Exception ex) { responseText = "Opps wehave an error! Exception message:" + ex.Message; } 
     return responseText ; 
    } 

我目前得到如下回应......

<string xmlns="http://tempuri.org/"/> 

我会非常想回到像

{"success" : true, "message" : "***Message Here***"} 

我相信的东西，一旦我得到它的想法，我将能够返回其他物品，如果需要的话。它只是我需要解决的基础。

所有帮助非常感谢，提前:)

UPDATE感谢：刚刚发现这个...

return "{Message:'hello world'}" 

我会需要这样的东西

responseText = "{"success" : true, "message" : \"There has been an error. Message: " + ex.Message + "\"}" 

Answer 1

用途：

[WebMethod] 
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]//Specify return format. 
public string CheckFeedSubmission() 
    { 
     string responseText = ""; 
     try 
     { 
      //Stuff goes here 
      responseText = "It Worked!" 
     } 
     catch (Exception ex) { responseText = "Opps wehave an error! Exception message:" + ex.Message; } 
     return responseText ; 
    } 

返回会像其结果是：

<string xmlns="http://tempuri.org/"/> 
{"success" : true, "message" : "***Message Here***"} 
</string> 

Answer 2

请使用属性为您的WebMethod

[WebMethod] 
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)] 

呼叫者将已经设置了的contentType为application/JSON使用的webmethod

Answer 3

试试这个：

[WebMethod] 
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]//Specify return format. 
public bool addUser(UserModel um) 
    { 
     bool result = false; 
     result = Conversion.intToBool(SplashAwardsDB.executeNonQuery(
      "INSERT INTO dbo.User (" 
      + "userName, password, firstName, lastName, address, contactNo, birthDate, familyID, familyRole, x, y) " 
      + " VALUES (" 
      + "'" + um.userName + "', " 
      + "'" + um.password + "', " 
      + "'" + um.firstName + "', " 
      + "'" + um.lastName + "', " 
      + "'" + um.address + "', " 
      + "'" + um.contactNo + "', " 
      + "'" + um.birthDate + "', " 
      + "'" + um.familyID + "', " 
      + "'" + um.familyRole + "', " 
      + "'" + um.x + "', " 
      + "'" + um.y + "')" 
      )); 
     return result; 
    } 

Answer 4

要删除XML标记在您的服务响应，看看StackOverflow上这个答案：

ASP.NET WebService is Wrapping my JSON response with XML tags

的