所以我觉得自己非常接近,只是缺少一些胶水才能让魔法发挥作用。
考虑一个代码类:
public class Transaction
{
[JsonProperty(PropertyName = "date")]
public DateTime Date { get; set; }
[JsonProperty(PropertyName = "payee")]
public string Payee { get; set; }
[JsonProperty(PropertyName = "amount")]
public double Amount { get; set; }
[JsonProperty(PropertyName = "category")]
public string Category { get; set; }
}
private ObservableCollection<Transaction> items;
private JArray result;
来自App.MobileService.InvokeApiAsync的这个JSON响应
[
{
"date": "2014-09-26T00:00:00Z",
"payee": "Expensive Restaurant",
"amount": -199,
"category": "Dining",
}
]
我已验证返回的JArray对象是否已正确解析并填充。我想将数据导入ObservableCollection。
我尝试了各种各样的咒语,最简单的是:
items = result;
错误
Cannot implicitly convert type 'Newtonsoft.Json.Linq.JArray' to 'System.Collections.ObjectModel.ObservableCollection<Transaction>'
或:
items = new ObservableCollection<Transaction> (result);
错误:
Argument 1: cannot convert from 'Newtonsoft.Json.Linq.JArray' to 'System.Collections.Generic.IEnumerable<Transaction>'
我已经阅读了大量的样本,看起来这应该是非常容易的,所以我确定我错过了一些简单的东西。任何帮助表示赞赏。
更新:
这就是我想要和工作的东西,但似乎我正在挫败JSON.NET类的一些内置反序列化功能的目的:
foreach (JObject jObject in result)
{
Transaction trans = new Transaction();
trans.Date = (DateTime)jObject["date"];
trans.Payee = (string)jObject["payee"];
trans.Amount = (double)jObject["amount"];
trans.Category = (string)jObject["category"];
items.Add(trans);
}
答案 0 :(得分:4)
如果JArray
中已有result
,并且您希望将其转换为ObservableCollection<Transaction>
,则可以这样做:
items = result.ToObject<ObservableCollection<Transaction>>();