如何在 Json.NET Silverlight 中使用 TypeNameHandling.Objects 反序列化? [英] How can I deserialize with TypeNameHandling.Objects in Json.NET Silverlight?

问题描述

在 Silverlight 中尝试反序列化时出现异常.Test1 失败，而 Test2 成功.我也试过 TypeNameAssemblyFormat 到 Simple 和 Full，但得到相同的结果.Test2可以解析程序集，为什么Json.NET不行?

I get an exception when trying to deserialize in Silverlight. Test1 fails, while Test2 succeeds. I've also tried TypeNameAssemblyFormat to both Simple and Full, but get same results. Test2 can resolve the assembly, why can't Json.NET?

更新:忘记提及我尝试反序列化的类型是在与发生反序列化的 Silverlight 程序集中不同的程序集中定义的.

Update: Forgot to mention the type I'm trying to deserialize is defined in a different assembly from the silverlight assembly where the deserialization occurs.

这两个测试都适用于非 Silverlight .NET 应用程序.

Both tests work in a non-silverlight .NET application.

如何反序列化具有类型名的 json 字符串?

private void Test1()
{
    JsonSerializerSettings settings = new JsonSerializerSettings();
    settings.TypeNameHandling = TypeNameHandling.Objects;
    string json1 = "{"$type":"AmberGIS.NetworkTrace.DTO.NTPoint, NetworkTrace.DTO.Assembly","X":0.0,"Y":0.0,"SpatialReference":null}";
    try
    {
        var n1 = JsonConvert.DeserializeObject<NTPoint>(json1, settings);
        //Error resolving type specified in JSON 'AmberGIS.NetworkTrace.DTO.NTPoint, NetworkTrace.DTO.Assembly'.
        //Could not load file or assembly 'NetworkTrace.DTO.Assembly, Culture=neutral, PublicKeyToken=null' or one of its dependencies. 
        //The requested assembly version conflicts with what is already bound in the app domain or specified in the manifest. 
        //(Exception from HRESULT: 0x80131053)
    }
    catch (Exception ex)
    {
        while (ex != null)
        {
            Debug.WriteLine(ex.Message);
            ex = ex.InnerException;
        }
    }
}

这个Test2成功了:

This Test2 succeeds:

private void Test2()
{
    var pnt1 = new AmberGIS.NetworkTrace.DTO.NTPoint();
    Debug.WriteLine(pnt1.GetType().AssemblyQualifiedName);
    // "AmberGIS.NetworkTrace.DTO.NTPoint, NetworkTrace.DTO.Assembly, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"

    string fullName = "AmberGIS.NetworkTrace.DTO.NTPoint, NetworkTrace.DTO.Assembly, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null";
    var t = Type.GetType(fullName);
    var pnt2 = Activator.CreateInstance(t) as NTPoint;

}

推荐答案

尝试将设置添加到 JsonConvert.DeserializeObject(json, Settings),设置在哪里:

Try adding settings to JsonConvert.DeserializeObject<T>(json, Settings), where Settings is:

new JsonSerializerSettings
                {
                    TypeNameHandling = TypeNameHandling.Objects,
                    TypeNameAssemblyFormat = System.Runtime.Serialization.Formatters.FormatterAssemblyStyle.Full
                }

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