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.该服务仅从我的数据库返回一些内容.我可以得到数据.但是，我担心JSON的格式.当前，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JSON的格式尽可能整洁.我相信(我可能是不正确的)，以干净的JSON表示的相同结果集应该看起来像这样:

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<Person>.
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，此代码对我有用:

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"}]

(全部一行)

我还在方法上使用了此属性:

I also used this attribute on the method:

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

方法="GET"的WebInvoke与WebGet相同，但是由于我的某些方法是POST，因此为了保持一致性，我使用了所有WebInvoke.

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

UriTemplate设置该方法可用的URL.所以我可以做一个 http://myserver/myvdir/JsonService.svc/players并且它可以正常工作.

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.

还可以检查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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