我想在asp.net c#代码中反序列化json数据。我在反序列化语句中收到nullreference异常:
public static string saveAllTreatments(string jsonval)
{
var output =JsonConvert.DeserializeObject<Treatments>(jsonval);
Treatments tr = (Treatments)output;
foreach (var item in tr.data)
{
Console.WriteLine("date: {0}, number: {1}, name: {2}, note: {3}",item.date, item.number, item.name,item.note);
}
}
这是我的班级:
public class Treatment
{
public DateTime date{ get; set; }
public int number{ get; set; }
public string name{ get; set; }
public string note { get; set; }
}
public class Treatments {
public List<Treatment> data { get; set; }
}
这是我的json:
{"treatment":[{"date":"09.07.2015","number":"22","name":"Jackson","note":"bla"}]}
我看到jsonval有json数据(它不是null有字符串json数据),我在反序列化输出时收到空引用异常。为什么会这样?
感谢。
答案 0 :(得分:1)
要将您的c#类与JSON匹配,您需要将data
字段的名称更改为treatment
:
public class Treatments
{
public List<Treatment> treatment { get; set; }
}
或者,您可以使用JsonProperty
属性指定名称:
public class Treatments
{
[JsonProperty("treatment")]
public List<Treatment> data { get; set; }
}
示例fiddle。
答案 1 :(得分:0)
{
"treatment":{
data:{
[{"date":"09.07.2015","number":"22","name":"Jackson","note":"bla"}]
}
}
}