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c# - 如何根据反序列化 json 字符串的响应在两个类之间切换?

转载 作者:太空宇宙 更新时间:2023-11-03 22:54:39 24 4
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我正在研究 xamarin.forms。我在 API 调用期间遇到问题。 我有一个用于登录的 API。

当电子邮件和密码有效时,响应为

{
"status": true,
"statusCode": 200,
"response": {
"Id": "83ae239e-764e-4cef-af86-363664a3a65a",
"Email": "rutul.mehta@atozinfoway.com",
"EmailConfirmed": false,
"PasswordHash": "AFetO7VdrveGEfVZEezldzkOkh6Xs0/JR18+0QDptO56UJzY5qgwpZcpudNM2cVxFA==",
"SecurityStamp": "f062b486-f19a-4981-96a7-0fc72f17e99f",
"PhoneNumber": null,
"PhoneNumberConfirmed": false,
"TwoFactorEnabled": false,
"LockoutEndDateUtc": null,
"LockoutEnabled": true,
"AccessFailedCount": 0,
"UserName": "rutul.mehta@atozinfoway.com",
"UserId": 5,
"Name": "Rutul",
"ZipCode": null,
"CountryId": null,
"IsDeleted": false,
"CreatedDate": "2017-08-23T13:41:22"
}
}

Json 到 C# 类是:

public class Response
{
public string Id { get; set; }
public string Email { get; set; }
public bool EmailConfirmed { get; set; }
public string PasswordHash { get; set; }
public string SecurityStamp { get; set; }
public object PhoneNumber { get; set; }
public bool PhoneNumberConfirmed { get; set; }
public bool TwoFactorEnabled { get; set; }
public object LockoutEndDateUtc { get; set; }
public bool LockoutEnabled { get; set; }
public int AccessFailedCount { get; set; }
public string UserName { get; set; }
public int UserId { get; set; }
public string Name { get; set; }
public object ZipCode { get; set; }
public object CountryId { get; set; }
public bool IsDeleted { get; set; }
public string CreatedDate { get; set; }
}

public class RootObject
{
public bool status { get; set; }
public int statusCode { get; set; }
public Response response { get; set; }
}

在具有返回类型“Response”的属性下的“RootObject”类中

public Response response { get; set; }

当电子邮件和密码无效时,响应为:

{
"status": false,
"statusCode": 203,
"response": "Invalid Email or Password."
}

json 到 c# 类是:

public class RootObject
{
public bool status { get; set; }
public int statusCode { get; set; }
public string response { get; set; }
}

在具有返回类型字符串的属性下面的“RootObject”类中

public string response { get; set; }

我在反序列化对象时遇到问题

服务调用函数:

private async Task GetService_SignIn()
{
try
{
string url = ServiceURLs.SignIn + "email=" + txtEmail.Text + "&password=" + txtPassword.Text;
var Service_response = await GetResponseFromWebService.GetResponse<SignIn.RootObject>(url);
if (Service_response != null)
{
if (Service_response.status)
{
// Application.Current.MainPage = new SideMenu();
Alert("Success", "Login success", "icon.png", Color.Green);
}
else
{
if (Service_response.statusCode == 417)
{
Alert("Alert", "WebServer Exception", "icon.png", Color.Red);
}
else if (Service_response.statusCode == 203)
{
Alert("Alert", "Invalid Email or Password", "icon.png", Color.Red);
}
}
}
else
{
Alert("Alert", "WebServer not Responding", "icon.png", Color.Red);
}
}
catch (WebException ex)
{
Alert("Exception", ex.Message, "icon.png", Color.Red);
}
}

获取响应的通用类:

public static async Task<T> GetResponse<T>(string URI) where T : class
{
if (NetworkInterface.GetIsNetworkAvailable())
{
HttpClient httpClient = new HttpClient();
//httpClient.DefaultRequestHeaders.IfModifiedSince = DateTimeOffset.Now;
//httpClient.DefaultRequestHeaders.TryAddWithoutValidation("Token", "dc642a7f5bd64912");

var request = new HttpRequestMessage(HttpMethod.Get, URI);

if (request.Headers.CacheControl == null)
{
request.Headers.CacheControl = new System.Net.Http.Headers.CacheControlHeaderValue();
}

request.Headers.CacheControl.NoCache = true;

var response1 = await httpClient.SendAsync(request);
if (response1 != null && response1.IsSuccessStatusCode)
{
var responseString = await response1.Content.ReadAsStringAsync();

if (!string.IsNullOrWhiteSpace(responseString))
{
return JsonConvert.DeserializeObject<T>(responseString);
}
}
}
return null;
}

当电子邮件和密码无效时,我从下面的行中得到异常

return JsonConvert.DeserializeObject(responseString);

如何根据响应在两个类之间切换?如果我没有反序列化 json 响应怎么知道状态码?

如何在c#中处理这种情况?

最佳答案

假设您使用的是 Newtonsoft - 您可以在 RootObjectResponse 属性中添加 JsonConverter 属性。转换器可以检测响应是否为字符串(在运行时)并将其分配给 Response 实例上的某个属性。

更多详情 here关于如何创建一个和here关于如何使用属性分配给属性。

示例 json 转换器如下所示:

public class StringToResponseConverter : JsonConverter
{
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
throw new NotImplementedException();
}

public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
object retVal = new Object();
if (reader.TokenType == JsonToken.StartObject)
{
var instance = (Response)serializer.Deserialize(reader, typeof(Response));
retVal = instance;
}
else if (reader.TokenType == JsonToken.String)
{
string message = (string)serializer.Deserialize(reader);
retVal = new Response { Message = message };
}

return retVal;
}

public override bool CanConvert(Type objectType)
{
return true;
}
}

并且,用法:

public class RootObject
{
public bool status { get; set; }
public int statusCode { get; set; }
[JsonConverter(typeof(StringToResponseConverter))]
public Response response { get; set; }
}

关于c# - 如何根据反序列化 json 字符串的响应在两个类之间切换?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45980917/

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