asp.net – 如何在Json中使用Gson将对象类型包含在asmx web服务

{"obj":{"__type":"B","name":"waqas","address":"sweden"}}

我能够在测试项目中工作,但像我说的,没有GSON参与.

编辑：
实际上,您可能还想看到另一个答案https://stackoverflow.com/a/10805715/1539015,谈到如何使GSON包含该__type参数.

EDIT2：
我创建了一个新的.NET网站.添加了一个类文件与您的A和B类(修改为使其公开)：

public class A
{
    public string name;
}

public class B : A
{
    public string address;
}

然后,我添加了一个Web服务,让WebMethod在你的问题.我还包括一个GetJson方法.以下是代码：

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.Web.Script.Services.ScriptService]
public class WebService : System.Web.Services.WebService {

    public WebService () {
    }

    [ScriptMethod(ResponseFormat = ResponseFormat.Json,UseHttpGet = true)]
    [WebMethod]
    public B GetJson()
    {
        return new B() { address = "addr",name = "nm" };
    }

    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    [WebMethod]
    public string PushJson(A obj)
    {
        B b = (B)obj;
        return b.address;
    }
}

然后,我使用jQuery编辑默认页面来调用Web方法：

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <p>
        <div id="GetResult">Click here for the result of getting json.</div>    
        <div id="PushResult">Click here for the result of pushing json.</div>    
    </p>
    <script type="text/javascript">
        $(document).ready(function () {
            // Add the page method call as an onclick handler for the div.
            $("#GetResult").click(function () {
                $.ajax({
                    type: "GET",url: "WebService.asmx/GetJson",contentType: "application/json; charset=utf-8",success: function (msg) {
                        // Replace the div's content with the page method's return.
                        $("#GetResult").text(msg.d.name);
                    }
                });
            });
            $("#PushResult").click(function () {
                $.ajax({
                    type: "POST",url: "WebService.asmx/PushJson",data: '{"obj":{"__type":"B","address":"sweden"}}',dataType: "json",success: function (msg) {
                        // Replace the div's content with the page method's return.
                        $("#PushResult").text(msg.d);
                    }
                });
            });
        });  
    </script>
</asp:Content>

如果在PushJson的webservice方法中放置一个断点,可以看到所创建的对象的类型为B,并且运行的对象也可以转换为类型B并使用.

这里没有GSON,但我相信我链接的其他帖子应该显示如何让GSON生成__type参数.