[英]JSON.Net cannot deserialize json array in custom JsonConverter
I've run into a confusing problem that i cannot seem to solve. 我遇到了一个似乎无法解决的令人困惑的问题。
I'm using Json.Net and i've written a custom Json converter to handle a special case in my application. 我正在使用Json.Net,并且编写了一个自定义Json转换器来处理我的应用程序中的特殊情况。 The issue i've run into is in the deserialize or ReadJson
method which is throwing an error when it tires to convert a JSON array into an array of strings: 我遇到的问题是在反序列化或ReadJson
方法中,当它厌倦了将JSON数组转换为字符串数组时会抛出错误:
The exact text of the error is: Unexpected token while deserializing object: PropertyName. Path 'RootPages', line 1, position 13.
错误的确切文本是: Unexpected token while deserializing object: PropertyName. Path 'RootPages', line 1, position 13.
出现Unexpected token while deserializing object: PropertyName. Path 'RootPages', line 1, position 13.
Unexpected token while deserializing object: PropertyName. Path 'RootPages', line 1, position 13.
As you can see from the inspector, the JProperty it is trying to deserialize (RootPages) has been parsed correctly and is valid JSON. 从检查器可以看到,它正尝试反序列化的JProperty(RootPages)已正确解析,并且是有效的JSON。
So i'm not entirely sure what is going on here, any enlightenment would be greatly appreciated.. 所以我不完全确定这里发生了什么,任何启发都将不胜感激。
If relevant, the original JSON string is as follows: 如果相关,则原始JSON字符串如下:
{
"RootPages": [
"TestItem1",
"TestItem2"
],
"Name": "root"
}
EDIT-CODE: 编辑-CODE:
ReadJson Method: 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);
}
Snippet of the interesting part of ChildPageCollection: ChildPageCollection的有趣部分的代码片段:
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;
...
}
I expect this is because the first property is an object with a property called 'RootPages' which is a string[]. 我期望这是因为第一个属性是一个对象,该对象具有名为'RootPages'的属性,该属性为string []。
Unfortunately from the looks of your screenshots you are trying to turn an object into a string array. 不幸的是,从屏幕快照的外观来看,您试图将一个对象转换为字符串数组。
This should work in the example you've given: 这应该在您给出的示例中起作用:
properties.First(p => p.Name == property.Name).Select(o => o.Children().Values<string>()).First().ToArray();
In place of: 代替:
properties.First(p => p.Name == property.Name).ToObject<string[]>();
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