asp.net - 如何在 Web 服务中返回 JSON？

Question

我需要一个Hello World例子...

[WebService(Namespace = "xxxxx")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ScriptService()]
public class Something : System.Web.Services.WebService
{
    public Something() { }

    [WebMethod]
    [ScriptMethod(ResponseFormat=ResponseFormat.Json)]
    public string HelloWorld()
    {
        return "{Message:'hello world'}";
    }
}

因为它会产生错误

{"Message":"Invalid JSON primitive: value.","StackTrace":"   at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializePrimitiveObject()\r\n   at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeInternal(Int32 depth)\r\n   at System.Web.Script.Serialization.JavaScriptObjectDeserializer.BasicDeserialize(String input, Int32 depthLimit, JavaScriptSerializer serializer)\r\n   at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize(JavaScriptSerializer serializer, String input, Type type, Int32 depthLimit)\r\n   at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize[T](String input)\r\n   at System.Web.Script.Services.RestHandler.GetRawParamsFromPostRequest(HttpContext context, JavaScriptSerializer serializer)\r\n   at System.Web.Script.Services.RestHandler.GetRawParams(WebServiceMethodData methodData, HttpContext context)\r\n   at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)","ExceptionType":"System.ArgumentException"}

出了什么问题？

编辑:如果我需要返回{Message:'',Type:1}怎么办？ ？

编辑2:最后一个的答案是:我可以返回 Dictionary<string, string>

Answer 1

您只需从函数中返回一个普通(即非 JSON)字符串，例如:

 return "Hello World"

假设您使用的是 .Net 3.5，您的 JSON 响应将是:

 {"d":"Hello World"}