Json没有得到实际的数据

Question

我传递了一些值给MVC控制器，它返回的是json值。现在的问题是，控制器方面，价值正常返回，但当我检查它在jQuery中，它显示未定义的数据。

控制器代码：

[HttpPost] 
[Authorize] 
public ActionResult DeleteServices(List<Int32> serMapId) 
{ 
    int success = -1; 
    if (serMapId.Count > 0) 
    { 
    int count = RequestDL.DelServices(serMapId); 
    if (count > 0) 
    { 
     success = count; 
    } 
    } 
    return Json(new { success }); 
} 

jQuery的Ajax的脚本：

$.ajax({ 
    url: "/CRM/DeleteServices", 
    type: "POST", 
    data: postData, 
    success: function (result) { 
    alert(result.success); 
    if (result.success > 0) { 
    alert("Service(s) deleted successfully"); 
    } 
    else { 
    alert("Service(s) not deleted successfully"); 
    } 
    }, 
    error: function() { 
    alert("Something goes wrong at server side."); 
    } 
}); 

预先感谢您。

Answer 1

尝试改变这种

return Json(new { success = success }); 

，或者响应

return Json(new { success }); 

一些快速测试产生以下结果：

//Returns 1 
//this is not a valid JSON object 
//If 'success' were a complex object, this would work as expected 
return Json(success); 

//Returns {"success":1} 
return Json(new { success }); 

//Returns {"success":1} 
return Json(new { success = success }); 

Answer 2

尝试使用GET请求返回你的成功目标是这样的：

return Json(success, JsonRequestBehavior.AllowGet); 

返回您的JSON这样的POST：

return Json(success); 

不要忘了HttpPost来装饰你的方法，以便您的控制器应该看起来像这样

[HttpPost] 
[Authorize] 
public ActionResult DeleteServices(List<Int32> serMapId) 
{ 
    int success = -1; 
    if (serMapId.Count > 0) 
    { 
    int count = RequestDL.DelServices(serMapId); 
    if (count > 0) 
    { 
     success = count; 
    } 
    } 
    return Json(success); 
} 

确保您的Ajax请求格式化为t他：

$.ajax({ 
    url: "/CRM/DeleteServices", 
    type: "POST", 
    data: postData, 
    dataType: 'json', 
    success: function (result) { 
    alert(result.success); 
    if (result.success > 0) { 
    alert("Service(s) deleted successfully"); 
    } 
    else { 
    alert("Service(s) not deleted successfully"); 
    } 
    }, 
    error: function() { 
    alert("Something goes wrong at server side."); 
    } 
}); 

Answer 3

添加

数据类型： 'JSON'，

在$就功能

$.ajax({ 
     url: "/CRM/DeleteServices", 
     type: "POST", 
     data: postData, 
     dataType:'json', 
    });