如何返回Json响应

时间:2013-08-20 15:28:06

标签: c# asp.net .net wcf

我正在尝试在我的C#restserviceA中实现一个方法A,它将Json消息返回给客户端。

该方法只是对内部托管服务进行另一次restservice调用,如下面的Say ResterviceB

HttpWebRequest req = WebRequest.Create(url) as HttpWebRequest;
req.Method = "GET";
resp = req.GetResponse() as HttpWebResponse;
resp = req.GetResponse() as HttpWebResponse;
            Encoding enc = Encoding.UTF8;
            loResponseStream = new StreamReader(resp.GetResponseStream(), enc);
            string strResponse = loResponseStream.ReadToEnd();
            return resp;

此方法将从RestServiceB以json格式获得响应。我怎么能以json格式将相同的json字符串返回给客户端。

我尝试将webmethod属性如下所示放到我的方法A中,但我从RestServiceA从MethodA获得的响应始终是字符串格式。

SVC界面:

[OperationContract ]
[WebGet(UriTemplate = "getresults", ResponseFormat = WebMessageFormat.Json)]
String GetResults();

SVC代码

public String GetResults()
{
   string str=//Call RestServiceB which returns response as below.
   "query":"myquery", "results": [ {"name":"result1", "type":"suggest"}, {"name":"result2", "type":"type2"}]" 
    return str;
}

这里有什么建议吗?谢谢。

1 个答案:

答案 0 :(得分:0)

您的JSON字符串被包装在另一个JSON字符串中。

返回原始JSON字符串的一种方法是将GetResults()的输出类型更改为Stream而不是string。

    public System.IO.Stream GetResults()
    {
       string str=//Call RestServiceB which returns response as below.
       "query":"myquery", "results": [ {"name":"result1", "type":"suggest"}, {"name":"result2", "type":"type2"}]"         
        WebOperationContext.Current.OutgoingResponse.ContentType =
        "application/json; charset=utf-8";
        return new MemoryStream(Encoding.UTF8.GetBytes(str));
    }

    [OperationContract ]
    [WebGet(UriTemplate = "getresults")]
    String GetResults();