处理 JSON 字符串反序列化期间的名称空间更改

我有 2 个应用程序在 redis 服务器的帮助下相互通信，在我的第一个应用程序中，我能够序列化和反序列化以及以下类型的对象

   {
 "$type": "System.Collections.Generic.Dictionary`2[[System.Int32, mscorlib],   [OPCMessagingService.Resource, OPCMessagingService]], mscorlib",
 "71": {
"$type": "OPCMessagingService.Resource, OPCMessagingService",
"SiteID": 2,
"ResourceID": 71,
"ProcessOrder": "001000380873",
"CurrentStatus": 0,
"CycleTime": 55,
"DeviceList": [
  {
    "$type": "OPCMessagingService.StackLight, OPCMessagingService",
    "ResourceId": 71,
    "DeviceIp": "10.142.117.7",
    "ComPort": "COM14"
  },
  {
    "$type": "OPCMessagingService.LED, OPCMessagingService",
    "ResourceId": 71,
    "DeviceIp": "10.142.117.3",
    "ComPort": "COM10",
    "IsMessageDelivered": false,
    "RetryCount": 3,
    "IsRetryRequired": true,
    "_messageHeader": ":*HF601011471",
    "_messageText": "DISPOMELT 5245 BULK - 0020 -投矿物油，树脂，液体树脂和橡胶",
    "_delayedMessageText": "",
    "_counter": 0
  }
],
"UpdateDate": 20150120,
"UpdateTime": 231506,
"CurrentDate": 20150124,
"CurrentTime": 151513,
"CurrentMessage": "DISPOMELT 5245 BULK - 0020 -投矿物油，树脂，液体树脂和橡胶"
  },
  "72": {
"$type": "OPCMessagingService.Resource, OPCMessagingService",
"SiteID": 2,
"ResourceID": 72,
"ProcessOrder": "001000380874",
"CurrentStatus": 0,
"CycleTime": 60,
"DeviceList": [
  {
    "$type": "OPCMessagingService.LED, OPCMessagingService",
    "ResourceId": 72,
    "DeviceIp": "10.142.117.98",
    "ComPort": "COM100",
    "IsMessageDelivered": false,
    "RetryCount": 3,
    "IsRetryRequired": true,
    "_messageHeader": ":*HF601011471",
    "_messageText": "DISPOMELT 5245 BULK - 0050 -熔树脂",
    "_delayedMessageText": "",
    "_counter": 0
  },
  {
    "$type": "OPCMessagingService.LED, OPCMessagingService",
    "ResourceId": 72,
    "DeviceIp": "10.142.117.4",
    "ComPort": "COM11",
    "IsMessageDelivered": false,
    "RetryCount": 3,
    "IsRetryRequired": true,
    "_messageHeader": ":*HF601011471",
    "_messageText": "DISPOMELT 5245 BULK - 0050 -熔树脂",
    "_delayedMessageText": "",
    "_counter": 0
  },
  {
    "$type": "OPCMessagingService.StackLight, OPCMessagingService",
    "ResourceId": 72,
    "DeviceIp": "10.142.117.8",
    "ComPort": "COM15"
  },
  {
    "$type": "OPCMessagingService.StackLight, OPCMessagingService",
    "ResourceId": 72,
    "DeviceIp": "10.142.117.97",
    "ComPort": "COM101"
  }
],
"UpdateDate": 20150120,
"UpdateTime": 231534,
"CurrentDate": 20150124,
"CurrentTime": 151513,
"CurrentMessage": "DISPOMELT 5245 BULK - 0050 -熔树脂"
  },
  "73": {
"$type": "OPCMessagingService.Resource, OPCMessagingService",
"SiteID": 2,
"ResourceID": 73,
"ProcessOrder": "001000375454",
"CurrentStatus": 0,
"CycleTime": 60,
"DeviceList": [
  {
    "$type": "OPCMessagingService.LED, OPCMessagingService",
    "ResourceId": 73,
    "DeviceIp": "10.142.117.5",
    "ComPort": "COM12",
    "IsMessageDelivered": false,
    "RetryCount": 3,
    "IsRetryRequired": true,
    "_messageHeader": ":*HF601011471",
    "_messageText": "XHC 9228 BULK - 0050 -熔树脂",
    "_delayedMessageText": "",
    "_counter": 0
  },
  {
    "$type": "OPCMessagingService.StackLight, OPCMessagingService",
    "ResourceId": 73,
    "DeviceIp": "10.142.117.9",
    "ComPort": "COM16"
  }
],
"UpdateDate": 20150120,
"UpdateTime": 223043,
"CurrentDate": 20150124,
"CurrentTime": 151513,
"CurrentMessage": "XHC 9228 BULK - 0050 -熔树脂"
  },
  "74": {
"$type": "OPCMessagingService.Resource, OPCMessagingService",
"SiteID": 2,
"ResourceID": 74,
"ProcessOrder": "001000375455",
"CurrentStatus": 0,
"CycleTime": 40,
"DeviceList": [
  {
    "$type": "OPCMessagingService.LED, OPCMessagingService",
    "ResourceId": 74,
    "DeviceIp": "10.142.117.2",
    "ComPort": "COM9",
    "IsMessageDelivered": false,
    "RetryCount": 3,
    "IsRetryRequired": true,
    "_messageHeader": ":*HF601011471",
    "_messageText": "XHC 9228 BULK - 0040 -投树脂和剩料:",
    "_delayedMessageText": "",
    "_counter": 0
  },
  {
    "$type": "OPCMessagingService.StackLight, OPCMessagingService",
    "ResourceId": 74,
    "DeviceIp": "10.142.117.1",
    "ComPort": "COM5"
  }
],
"UpdateDate": 20150120,
"UpdateTime": 224143,
"CurrentDate": 20150124,
"CurrentTime": 151513,
"CurrentMessage": "XHC 9228 BULK - 0040 -投树脂和剩料:"
  },
  "75": {
"$type": "OPCMessagingService.Resource, OPCMessagingService",
"SiteID": 2,
"ResourceID": 75,
"ProcessOrder": "001000375456",
"CurrentStatus": 0,
"CycleTime": 50,
"DeviceList": [
  {
    "$type": "OPCMessagingService.StackLight, OPCMessagingService",
    "ResourceId": 75,
    "DeviceIp": "10.142.117.10",
    "ComPort": "COM17"
  },
  {
    "$type": "OPCMessagingService.LED, OPCMessagingService",
    "ResourceId": 75,
    "DeviceIp": "10.142.117.6",
    "ComPort": "COM13",
    "IsMessageDelivered": false,
    "RetryCount": 3,
    "IsRetryRequired": true,
    "_messageHeader": ":*HF601011471",
    "_messageText": "XHC 9228 BULK - 0020 -投矿物油和橡胶、抗氧剂,升温",
    "_delayedMessageText": "",
    "_counter": 0
  }
],
"UpdateDate": 20150120,
"UpdateTime": 225331,
"CurrentDate": 20150124,
"CurrentTime": 151513,
"CurrentMessage": "XHC 9228 BULK - 0020 -投矿物油和橡胶、抗氧剂,升温"
 }
 }

我能够在一个应用程序中序列化它并反序列化它，但是当我尝试在另一个显然具有不同命名空间的应用程序中反序列化它时。我得到一个例外

解析 JSON 'System.Collections.Generic.Dictionary'2[[System.Int32， mscorlib]，[OPCMessagingService.Resource， OPCMessagingService]]， mscorlib 中指定的错误类型。路径"$type"，第 1 行，位置 138。

我尝试在另一个应用程序中反序列化 Json 字符串时执行以下操作，但它不起作用，我还能做些什么来反序列化这个对象

 public static T GetRedisKeyValue<T>(string key)
    {
        if (key.Trim().Length > 0)
        {
            GetSentinelMaster();
            using (ConnectionMultiplexer redisClient = ConnectionMultiplexer.Connect(GetRedisConfiguraion()))
            {
                IDatabase redisDB = redisClient.GetDatabase(); // Getting database connection
                string temp = redisDB.StringGet(key);
                Type type = typeof(T);
                JObject jsonObject = JObject.Parse(temp);
                jsonObject["$type"] = type.FullName + ", " + type.Assembly.FullName;
               // JsonConvert.DeserializeObject<T>(temp);
                return JsonConvert.DeserializeObject<T>(temp, new JsonSerializerSettings { TypeNameHandling = TypeNameHandling.Objects, TypeNameAssemblyFormat = System.Runtime.Serialization.Formatters.FormatterAssemblyStyle.Full });
            }
        }
        return default(T);
    }

我还能做些什么来实现这一目标。？

"$type"的格式被正式硬编码为包含发送系统的 CLR 命名空间。请参阅此处进行确认。因此，您可以：

重命名 CLR 命名空间以匹配发送系统的命名空间，或者
对DefaultSerializationBinder进行子类化，并通过在反序列化期间使用它来重命名 CLR 命名空间名称JsonSerializerSettings.Binder。

以下是这样做的第一个切口：

public class NamespaceMappingSerializationBinder : DefaultSerializationBinder
{
    public string FromNamespace { get; set; }
    public string ToNamespace { get; set; }
    public override Type BindToType(string assemblyName, string typeName)
    {
        string fixedTypeName;
        if (FromNamespace != null && ToNamespace != null)
        {
            fixedTypeName = typeName.Replace(FromNamespace, ToNamespace);
        }
        else
        {
            fixedTypeName = typeName;
        }
        var type = base.BindToType(assemblyName, fixedTypeName);
        return type;
    }
}

然后，当您反序列化 JSON 时，在JsonSerializerSettings中设置Binder，如下所示：

JsonSerializerSettings settings = new JsonSerializerSettings { TypeNameHandling = TypeNameHandling.Objects, Binder = new NamespaceMappingSerializationBinder { FromNamespace = "From Namespace", ToNamespace = "Your Namespace" } };

上面类型名称解析非常粗糙。我在这里找到了一个更智能的解析器：如何解析 C# 泛型类型名称？您可能还需要扩展自定义Binder以获得映射字典。

同样，如果需要在序列化时重新映射命名空间名称，并且正在使用 .Net 4.0 或更高版本，则可以覆盖BindToName。

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