jQuery ajax调用返回JSON解析错误 [英] jquery ajax call return JSON parsing error
问题描述
我正在使用jquery调用ajax wcf方法，该方法将对象列表作为JSON字符串返回.在fiddler2中(在TextView中)检查时，JSON字符串如下所示:
I am using jquery to call an ajax wcf method that returns a list of objects as a JSON string. The JSON string looks like this when inspecting it in fiddler2 (in TextView):
{"d":"[{\"ID\":\"6b2b8c62-31ce-4df2-982b-054ff5f6be72\",\"Name\":\"Carol\",\"Surname\":\"IrishWife\"},{\"ID\":\"d254740a-0a0f-4a1e-9e4f-0812227dd5af\",\"Name\":\"Willie\",\"Surname\":\"Le Roux\"},{\"ID\":\"660bf0dd-436a-4588-a9c0-19fd6fdcee23\",\"Name\":\"Emmas\",\"Surname\":\"Mum\"},{\"ID\":\"6b9403c5-b728-4e96-bcb1-203e7472eec3\",\"Name\":\"Owen\",\"Surname\":\"Lima\"},{\"ID\":\"d52c08fb-4418-4600-960f-243ff4443ee6\",\"Name\":\"Tim\",\"Surname\":\"Lee\"},{\"ID\":\"e2aacf5b-8855-44ce-9338-3d39f8ab3349\",\"Name\":\"Marcello\",\"Surname\":\"MT\"},{\"ID\":\"578be087-8385-46d6-89de-3db31d352cbc\",\"Name\":\"Carlyn\",\"Surname\":\"Homegroup\"},{\"ID\":\"4c805825-2bee-447a-8b75-41ead17db33e\",\"Name\":\"George\",\"Surname\":\"Homegroup\"},{\"ID\":\"ae48804f-5e78-42c8-9ba0-4214c98a5a89\",\"Name\":\"Isla\",\"Surname\":\"Le Roux\"},{\"ID\":\"f8be2f4f-fedb-4863-8a84-44fddea84ea9\",\"Name\":\"Peter\",\"Surname\":\"Anderson\"},{\"ID\":\"15e7644d-ec43-44ff-a959-47e00112da6b\",\"Name\":\"Kitty\",\"Surname\":\"Corbett\"},{\"ID\":\"8fd7fccc-335c-4d5c-93b5-4b00f96a9950\",\"Name\":\"Natalie\",\"Surname\":\"Archibald\"},{\"ID\":\"09b5aad2-2cf1-488a-962b-4d692b05ddea\",\"Name\":\"Miku\",\"Surname\":\"Heally\"},{\"ID\":\"affa369e-5af3-4537-a0f4-71422956da41\",\"Name\":\"Steven\",\"Surname\":\"Corbett\"},{\"ID\":\"65f57da3-4f88-4798-9590-83b4ccecfc44\",\"Name\":\"Tim\",\"Surname\":\"Archibald\"},{\"ID\":\"53bfb451-f66f-4b6e-b430-8d13c95b30d8\",\"Name\":\"Philip\",\"Surname\":\"MT\"},{\"ID\":\"c7f22b9b-4030-4f82-9f75-bbb726cabb73\",\"Name\":\"Vincent\",\"Surname\":\"Van Der Walt\"},{\"ID\":\"232577be-3165-4316-a20d-c2f2a09c5382\",\"Name\":\"Scott\",\"Surname\":\"Lynn\"},{\"ID\":\"913508a1-5dca-4504-8caf-c8e3dc386fc0\",\"Name\":\"Dan\",\"Surname\":\"MT\"},{\"ID\":\"36054a07-b14d-4c1c-b35f-e00875dde7e5\",\"Name\":\"Sarah\",\"Surname\":\"MT\"},{\"ID\":\"f14e7d98-e040-4ba9-928f-f2ff48116b0b\",\"Name\":\"Josh\",\"Surname\":\"IrishDude\"}]"}
当我在提琴手的JSON视图中检查结果时，它显示以下JSON:
When I inspect the result in fiddler's JSON View, it shows the following JSON:
d=[{"ID":"6b2b8c62-31ce-4df2-982b-054ff5f6be72","Name":"Carol","Surname":"IrishWife"},{"ID":"d254740a-0a0f-4a1e-9e4f-0812227dd5af","Name":"Willie","Surname":"Le Roux"},{"ID":"660bf0dd-436a-4588-a9c0-19fd6fdcee23","Name":"Emmas","Surname":"Mum"},{"ID":"6b9403c5-b728-4e96-bcb1-203e7472eec3","Name":"Owen","Surname":"Lima"},{"ID":"d52c08fb-4418-4600-960f-243ff4443ee6","Name":"Tim","Surname":"Lee"},{"ID":"e2aacf5b-8855-44ce-9338-3d39f8ab3349","Name":"Marcello","Surname":"MT"},{"ID":"578be087-8385-46d6-89de-3db31d352cbc","Name":"Carlyn","Surname":"Homegroup"},{"ID":"4c805825-2bee-447a-8b75-41ead17db33e","Name":"George","Surname":"Homegroup"},{"ID":"ae48804f-5e78-42c8-9ba0-4214c98a5a89","Name":"Isla","Surname":"Le Roux"},{"ID":"f8be2f4f-fedb-4863-8a84-44fddea84ea9","Name":"Peter","Surname":"Anderson"},{"ID":"15e7644d-ec43-44ff-a959-47e00112da6b","Name":"Kitty","Surname":"Corbett"},{"ID":"8fd7fccc-335c-4d5c-93b5-4b00f96a9950","Name":"Natalie","Surname":"Archibald"},{"ID":"09b5aad2-2cf1-488a-962b-4d692b05ddea","Name":"Miku","Surname":"Heally"},{"ID":"affa369e-5af3-4537-a0f4-71422956da41","Name":"Steven","Surname":"Corbett"},{"ID":"65f57da3-4f88-4798-9590-83b4ccecfc44","Name":"Tim","Surname":"Archibald"},{"ID":"53bfb451-f66f-4b6e-b430-8d13c95b30d8","Name":"Philip","Surname":"MT"},{"ID":"c7f22b9b-4030-4f82-9f75-bbb726cabb73","Name":"Vincent","Surname":"Van Der Walt"},{"ID":"232577be-3165-4316-a20d-c2f2a09c5382","Name":"Scott","Surname":"Lynn"},{"ID":"913508a1-5dca-4504-8caf-c8e3dc386fc0","Name":"Dan","Surname":"MT"},{"ID":"36054a07-b14d-4c1c-b35f-e00875dde7e5","Name":"Sarah","Surname":"MT"},{"ID":"f14e7d98-e040-4ba9-928f-f2ff48116b0b","Name":"Josh","Surname":"IrishDude"}]
因此提琴手可以成功解析它，但是在客户端上，jQuery ajax错误回调函数显示以下错误:
So fiddler can parse it successfully, but on the client, the jquery ajax error callback function displays the following error:
Error: No conversion from text to application/json
wcf方法定义如下:
The wcf method is defined as follows:
[OperationContract]
[WebGet(ResponseFormat=WebMessageFormat.Json)]
public string GetPeople(Guid groupId)
{
using (SchedulerContext context = new SchedulerContext())
{
JavaScriptSerializer ser = new JavaScriptSerializer();
var query = from p in context.People
where p.Group_ID == groupId
select new
{
p.ID,
p.Name,
p.Surname
};
return ser.Serialize(query.ToArray());
}
}
最后，调用的jquery是:
And finally, the calling jquery is:
$.ajax(
{
type: "GET",
dataType: "application/json",
contentType: "json",
data: { groupId: 'ae09a080-5d7c-4e92-9a87-591574b7c4b8' },
url: "WebAPI.svc/GetPeople",
error: function (jqXHR, textStatus, errorThrown) {
alert("error");
},
success: function (msg) {
alert(msg.d[0].Name);
}
}
);
提前谢谢！
更新: 感谢@ user1370958，距离解决方案更近了一步.
UPDATE: Thanks to @user1370958, one step closer to the solution.
将错误回调函数更改为以下内容时，它会成功返回结果...
When changing the error callback function to the following it successfully returns the result...
error: function (jqXHR, textStatus, errorThrown) {
var test = $.parseJSON(jqXHR.responseText);
var test2 = $.parseJSON(test.d);
alert(test2[0].Name);
},
不知道为什么，但是我必须解析结果，然后解析其中的嵌套对象.我假设如果我返回的任何类型都包含复杂的对象，那么它还需要另一个解析...
Not sure why, but I have to parse the result and then parse the nested objects inside that. I'm assuming if any of my returned types contained complex objects it would also have needed another parse...
推荐答案
在这里，"application/json"对于dataType属性不是有效值.
我在项目中将其更改为"json"，并且解决了相同的问题.
Here, "application/json" is not a valid value for the dataType property.
I changed it to "json" in my project and the same problem was solved.
请在此处查看详细信息(评论#7): http://bugs.jquery.com/ticket/8216
Please check details here (comment #7): http://bugs.jquery.com/ticket/8216
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