无法将List <>对象序列化/反序列化为JSON

Question

我正在开发2个Web应用程序; A&B.现在我在两个Web应用程序中都有一个名为CRUDOutput的共享类: -

public class CRUDOutput
{
    public Operation4 operation { get; set; }
}
public class Operation4
{
    public Result result { get; set; }
    public string name { get; set; }
}
public class Result
{
    public string status { get; set; }
    public string message { get; set; }

}

现在在Web应用程序中我正在返回以下内容: -

[HttpPost]
public ActionResult CreateResource(CreateResource cr)
{
    List<CRUDOutput> co = new List<CRUDOutput>();
            co.Add(JsonConvert.DeserializeObject<CRUDOutput>(crudoutput));
            co.Add(JsonConvert.DeserializeObject<CRUDOutput>(crudoutput2));

    return Json(JsonConvert.SerializeObject(co));
}

现在从Web应用程序B,我调用的操作方法如下: -

try
{
    using (WebClient wc = new WebClient()) 
    {
        string url = "https://localhost:44302/" + "Home/CreateResource";
        Uri uri = new Uri(url);
        wc.Headers.Add(HttpRequestHeader.ContentType, "application/json");

        output = wc.UploadString(uri,  data);
    }
}
catch (WebException e)
{
}
List<CRUDOutput> result = JsonConvert.DeserializeObject<List< CRUDOutput>>(output);

但是当我试图反序列化输出时,我会得到以下异常: -

转换值时出错"[{"operation":{"result":{"status":"Success","message":"资源已成功添加到......"},"name":"CREATE资源"}},{"操作":{"结果":{"状态":"失败","消息":"帐户添加"},"名称":"添加帐户"}}]"输入'系统.Collections.Generic.List`1 [S.ViewModels.CRUDOutput]".路径'',第1行,第464位.

现在,从Web应用程序A返回的JSON将如下: -

"\"[{\\\"operation\\\":{\\\"result\\\":{\\\"status\\\":\\\"Success\\\",\\\"message\\\":\\\"Resource 123 rfrf has been added successfully \\\"},\\\"name\\\":\\\"CREATE RESOURCE\\\"}},{\\\"operation\\\":{\\\"result\\\":{\\\"status\\\":\\\"Failed\\\",\\\"message\\\":\\\"Account addition \\\"},\\\"name\\\":\\\"ADD ACCOUNTS\\\"}}]\""

所以任何人都可以建议为什么我无法反序列化为对象列表？

Answer 1

您粘贴的输出被编码为JSON两次.比较两者之间的区别:

"\"[{\\\"operation\\\":{\\\"result\\\":{\\\"status\\\":\\\"Success\\\",\\\"message\\\":\\\"Resource 123 rfrf has been added successfully \\\"},\\\"name\\\":\\\"CREATE RESOURCE\\\"}},{\\\"operation\\\":{\\\"result\\\":{\\\"status\\\":\\\"Failed\\\",\\\"message\\\":\\\"Account addition \\\"},\\\"name\\\":\\\"ADD ACCOUNTS\\\"}}]\""

和

"[{\"operation\":{\"result\":{\"status\":\"Success\",\"message\":\"Resource 123 rfrf has been added successfully \"},\"name\":\"CREATE RESOURCE\"}},{\"operation\":{\"result\":{\"status\":\"Failed\",\"message\":\"Account addition \"},\"name\":\"ADD ACCOUNTS\"}}]"

发生这种情况是因为您将结果编码为Json两次.更换:

return Json(JsonConvert.SerializeObject(result));

同

return Json(result);    // This encodes as JSON automatically