我遇到了一个我似乎无法解决的令人困惑的问题。
我使用的是Json。Net编写了一个自定义Json转换器来处理我的应用程序中的特殊情况。
我遇到的问题是反序列化或
ReadJson
方法,该方法在尝试将JSON数组转换为字符串数组时引发错误:
错误的确切文本为:
Unexpected token while deserializing object: PropertyName. Path 'RootPages', line 1, position 13.
正如您从检查器中看到的,它试图反序列化的JProperty(RootPages)已被正确解析,并且是有效的JSON。
所以我不完全确定这里发生了什么,任何启示都将不胜感激。。
如果相关,原始JSON字符串如下所示:
{
"RootPages": [
"TestItem1",
"TestItem2"
],
"Name": "root"
}
编辑代码:
ReadJson方法:
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer) {
if (PartialChildPageSerialization) {
var jsonObject = JObject.Load(reader);
var properties = jsonObject.Properties().ToList();
foreach (var property in objectType.GetProperties()) {
var type = property.PropertyType;
object value = null;
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(ChildPageCollection<>)) {
var collection = Activator.CreateInstance(type);
var deserializedValue = properties.First(p => p.Name == property.Name).ToObject<string[]>();
type.GetMethod("PolulateFromSerializer").Invoke(collection, new object[] {deserializedValue});
value = collection;
}
else {
value = properties.First(p => p.Name == property.Name).ToObject(type);
}
property.SetValue(existingValue, value);
}
return existingValue;
}
return serializer.Deserialize(reader, objectType);
}
ChildPageCollection有趣部分的片段:
public class ChildPageCollection<T> : IList<T> where T : DataPage
{
public string[] GetNames() => _internalNameList.ToArray();
internal void PolulateFromSerializer(string[] names) {
this.Clear();
_internalNameList.AddRange(names);
_hasFullList = false;
}
private void CheckFullList() {
if(!_hasFullList)
throw new InvalidOperationException("Collection has not been fully loaded, and full list is not avialable.");
}
private readonly List<T> _internalList = new List<T>();
private readonly List<string> _internalNameList = new List<string>();
private bool _hasFullList = true;
...
}