我正在尝试序列化/反序列化Dictionary<string, object>
,如果对象是一个简单的类型似乎工作正常,但是当对象更复杂时它不起作用。
我有这堂课:
public class UrlStatus
{
public int Status { get; set; }
public string Url { get; set; }
}
在我的词典中,我添加了一个带有“Redirect Chain”键的List<UrlStatus>
和一些带有“Status”,“Url”,“Parent Url”键的简单字符串。我从JSON.Net回来的字符串如下所示:
{"$type":"System.Collections.Generic.Dictionary`2[[System.String, mscorlib],[System.Object, mscorlib]], mscorlib","Status":"OK","Url":"http://www.ehow.com/m/how_5615409_create-pdfs-using-bean.html","Parent Url":"http://www.ehow.com/mobilearticle35.xml","Redirect Chain":[{"$type":"Demand.TestFramework.Core.Entities.UrlStatus, Demand.TestFramework.Core","Status":301,"Url":"http://www.ehow.com/how_5615409_create-pdfs-using-bean.html"}]}
我用来序列化的代码如下:
JsonConvert.SerializeObject(collection, Formatting.None, new JsonSerializerSettings
{
TypeNameHandling = TypeNameHandling.Objects,
TypeNameAssemblyFormat = System.Runtime.Serialization.Formatters.FormatterAssemblyStyle.Simple
});
反序列化我正在做的事情:
JsonConvert.DeserializeObject<T>(collection, new JsonSerializerSettings
{
TypeNameHandling = TypeNameHandling.Objects,
TypeNameAssemblyFormat = System.Runtime.Serialization.Formatters.FormatterAssemblyStyle.Simple,
});
字典恢复正常,所有字符串都返回正常,但List没有正确反序列化。它只是回来了
{[
{
"$type": "XYZ.TestFramework.Core.Entities.UrlStatus, XYZ.TestFramework.Core",
"Status": 301,
"Url": "/how_5615409_create-pdfs-using-bean.html"
}
]}
当然我可以再次取消这个字符串,我得到了正确的对象,但似乎JSON.Net应该为我做这个。显然,我做错了什么,但我不知道它是什么。
答案 0 :(得分:43)
我认为这是旧版Json.NET中的一个错误。如果您尚未使用最新版本,请升级并重试。
public class UrlStatus
{
public int Status { get; set; }
public string Url { get; set; }
}
[TestMethod]
public void GenericDictionaryObject()
{
Dictionary<string, object> collection = new Dictionary<string, object>()
{
{"First", new UrlStatus{ Status = 404, Url = @"http://www.bing.com"}},
{"Second", new UrlStatus{Status = 400, Url = @"http://www.google.com"}},
{"List", new List<UrlStatus>
{
new UrlStatus {Status = 300, Url = @"http://www.yahoo.com"},
new UrlStatus {Status = 200, Url = @"http://www.askjeeves.com"}
}
}
};
string json = JsonConvert.SerializeObject(collection, Formatting.Indented, new JsonSerializerSettings
{
TypeNameHandling = TypeNameHandling.All,
TypeNameAssemblyFormat = FormatterAssemblyStyle.Simple
});
Assert.AreEqual(@"{
""$type"": ""System.Collections.Generic.Dictionary`2[[System.String, mscorlib],[System.Object, mscorlib]], mscorlib"",
""First"": {
""$type"": ""Newtonsoft.Json.Tests.Serialization.TypeNameHandlingTests+UrlStatus, Newtonsoft.Json.Tests"",
""Status"": 404,
""Url"": ""http://www.bing.com""
},
""Second"": {
""$type"": ""Newtonsoft.Json.Tests.Serialization.TypeNameHandlingTests+UrlStatus, Newtonsoft.Json.Tests"",
""Status"": 400,
""Url"": ""http://www.google.com""
},
""List"": {
""$type"": ""System.Collections.Generic.List`1[[Newtonsoft.Json.Tests.Serialization.TypeNameHandlingTests+UrlStatus, Newtonsoft.Json.Tests]], mscorlib"",
""$values"": [
{
""$type"": ""Newtonsoft.Json.Tests.Serialization.TypeNameHandlingTests+UrlStatus, Newtonsoft.Json.Tests"",
""Status"": 300,
""Url"": ""http://www.yahoo.com""
},
{
""$type"": ""Newtonsoft.Json.Tests.Serialization.TypeNameHandlingTests+UrlStatus, Newtonsoft.Json.Tests"",
""Status"": 200,
""Url"": ""http://www.askjeeves.com""
}
]
}
}", json);
object c = JsonConvert.DeserializeObject(json, new JsonSerializerSettings
{
TypeNameHandling = TypeNameHandling.All,
TypeNameAssemblyFormat = FormatterAssemblyStyle.Simple
});
Assert.IsInstanceOfType(c, typeof(Dictionary<string, object>));
Dictionary<string, object> newCollection = (Dictionary<string, object>)c;
Assert.AreEqual(3, newCollection.Count);
Assert.AreEqual(@"http://www.bing.com", ((UrlStatus)newCollection["First"]).Url);
List<UrlStatus> statues = (List<UrlStatus>) newCollection["List"];
Assert.AreEqual(2, statues.Count);
}
}
编辑,我刚刚注意到你提到了一个清单。 TypeNameHandling应设置为All。