我有一个JSON数组,其中包含具有不同属性的不同类型的对象.其中一个属性称为"类型",并确定数组项的类型.以下是我的数据示例:
[{
type : "comment",
text : "xxxx"
}, {
type : "code",
tokens : [{
type : "ref",
data : "m"
}, {
type : "operator",
data : "e"
}
]
}, {
type : "for",
boundLocal : {
type : "local",
name : "i",
kind : "Number"
},
upperBound : {
type : "ref",
tokens : [{
type : "operator",
data : "3"
}, {
type : "operator",
data : "0"
}
]
},
body : [{
type : "code",
tokens : [{
type : "ref",
data : "x"
}
]
}, {
type : "code",
tokens : [{
type : "ref",
data : "y"
}
}
]
]
]
To map those objects to my .Net implementation I define a set of classes: one base class and several child classes (with a complex hierarchy, having 4 "generations"). Here is just a small example of these classes:
public abstract class TExpression
{
[JsonProperty("type")]
public string Type { get; set; }
}
public class TComment : TExpression
{
[JsonProperty("text")]
public string Text { get; set; }
}
public class TTokenSequence : TExpression
{
[JsonProperty("tokens")]
public List<TToken> Tokens { get; set; }
}
What I want to reach is to be able to deserialize this array into a covariant generic list, declared as:
List<TExpression> myexpressions = JsonConvert.DeserializeObject<List<TExpression>>(aststring);
This list should contain the instances of appropriate child classes inheriting from TExpression, so I can use the following code later in my code:
foreach(TExpression t in myexpressions)
{
if (t is TComment) dosomething;
if (t is TTokenSequence) dosomethingelse;
}
如何使用JSON访问它.网