如何从 WCF 服务返回干净的 JSON? [英] How do I return clean JSON from a WCF Service?

问题描述

我正在尝试从 WCF 服务返回一些 JSON.该服务只是从我的数据库中返回一些内容.我可以得到数据.但是，我担心我的 JSON 的格式.目前，返回的 JSON 格式如下:

I am trying to return some JSON from a WCF service. This service simply returns some content from my database. I can get the data. However, I am concerned about the format of my JSON. Currently, the JSON that gets returned is formatted like this:

{"d":"[{"Age":35,"FirstName":"Peyton","LastName":"Manning"},{"Age":31,"FirstName":"Drew","LastName":"Brees"},{"Age":29,"FirstName":"Tony","LastName":"Romo"}]"} 

实际上，我希望我的 JSON 格式尽可能干净.我相信(我可能不正确)，以干净的 JSON 表示的相同结果集合应该如下所示:

In reality, I would like my JSON to be formatted as cleanly as possible. I believe (I may be incorrect), that the same collection of results, represented in clean JSON, should look like so:

[{
  "Age": 35,
  "FirstName": "Peyton",
  "LastName": "Manning"
}, {
  "Age": 31,
  "FirstName": "Drew",
  "LastName": "Brees"
}, {
  "Age": 29,
  "FirstName": "Tony",
  "LastName": "Romo"
}]

我不知道d"是从哪里来的.我也不知道为什么要插入转义字符.我的实体如下所示:

I have no idea where the "d" is coming from. I also have no clue why the escape characters are being inserted. My entity looks like the following:

[DataContract]
public class Person
{
    [DataMember]
    public string FirstName { get; set; }

    [DataMember]
    public string LastName { get; set; }

    [DataMember]
    public int Age { get; set; }

    public Person(string firstName, string lastName, int age)
    {
        this.FirstName = firstName;
        this.LastName = lastName;
        this.Age = age;
    }
}

负责返回内容的服务定义为:

The service that is responsible for returning the content is defined as:

[ServiceContract(Namespace = "")]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class TestService
{
    [OperationContract]
    [WebGet(ResponseFormat = WebMessageFormat.Json)]
    public string GetResults()
    {
        List<Person> results = new List<Person>();
        results.Add(new Person("Peyton", "Manning", 35));
        results.Add(new Person("Drew", "Brees", 31));
        results.Add(new Person("Tony", "Romo", 29));

        // Serialize the results as JSON
        DataContractJsonSerializer serializer = new DataContractJsonSerializer(results.GetType());
        MemoryStream memoryStream = new MemoryStream();
        serializer.WriteObject(memoryStream, results);

        // Return the results serialized as JSON
        string json = Encoding.Default.GetString(memoryStream.ToArray());
        return json;
    }
}

如何从 WCF 服务返回干净"的 JSON?谢谢！

How do I return "clean" JSON from a WCF service? Thank you!

推荐答案

将 GetResults 的返回类型更改为 List.
消除用于将 List 序列化为 json 字符串的代码 - WCF 会自动为您执行此操作.

Change the return type of your GetResults to be List<Person>.
Eliminate the code that you use to serialize the List to a json string - WCF does this for you automatically.

使用您对 Person 类的定义，此代码适用于我:

Using your definition for the Person class, this code works for me:

public List<Person> GetPlayers()
{
    List<Person> players = new List<Person>();
    players.Add(new  Person { FirstName="Peyton", LastName="Manning", Age=35 } );
    players.Add(new  Person { FirstName="Drew", LastName="Brees", Age=31 } );
    players.Add(new  Person { FirstName="Brett", LastName="Favre", Age=58 } );

    return players;
}

结果:

[{"Age":35,"FirstName":"Peyton","LastName":"Manning"},  
 {"Age":31,"FirstName":"Drew","LastName":"Brees"},  
 {"Age":58,"FirstName":"Brett","LastName":"Favre"}]

(全部在一行)

我也在方法上使用了这个属性:

I also used this attribute on the method:

[WebInvoke(Method = "GET",
           RequestFormat = WebMessageFormat.Json,
           ResponseFormat = WebMessageFormat.Json,
           UriTemplate = "players")]

WebInvoke with Method="GET" 与 WebGet 相同，但由于我的一些方法是 POST，我使用所有 WebInvoke 以保持一致性.

WebInvoke with Method= "GET" is the same as WebGet, but since some of my methods are POST, I use all WebInvoke for consistency.

UriTemplate 设置方法可用的 URL.所以我可以做一个GEThttp://myserver/myvdir/JsonService.svc/players 就可以了.

The UriTemplate sets the URL at which the method is available. So I can do a GET on http://myserver/myvdir/JsonService.svc/players and it just works.

还要检查 IIRF 或其他 URL 重写器以摆脱 URI 中的 .svc.

Also check out IIRF or another URL rewriter to get rid of the .svc in the URI.

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