将json字符串反序列化为对象c#.net

Question

我有一个JSON字符串,需要反序列化为一个对象.

这是我尝试过的:

课程:

public class trn
{
    public string visited_date { get; set; }
    public string party_code { get; set; }
    public string response { get; set; }
    public string response_type { get; set; }
    public string time_stamp { get; set; }
    public string trans_id { get; set; }
    public double total_amount { get; set; }
    public double discount { get; set; }
}

json字符串:

string json = "{\"trn\":{\"visited_date\":\"2015-04-05\",\"party_code\":\"8978a1bf-c88b-11e4-a815-00ff2dce0943\",\"response\":\"Reason 5\",\"response_type\":\"NoOrder\",\"time_stamp\":\"2015-04-05 18:27:42\",\"trans_id\":\"8e15f00b288a701e60a08f968a42a560\",\"total_amount\":0.0,\"discount\":0.0}}";

trn model2 = new System.Web.Script.Serialization.JavaScriptSerializer().Deserialize<trn>(json);

并使用json.net

trn model = JsonConvert.DeserializeObject<trn>(json);

但所有属性都使用空值初始化.

Answer 1

您的JSON表示trn在另一个对象中具有属性的对象.所以你需要在代码中表示它.例如:

using System;
using System.IO;
using Newtonsoft.Json;

public class Transaction
{
    [JsonProperty("visited_date")]
    public DateTime VisitedDate { get; set; }
    [JsonProperty("party_code")]
    public string PartyCode { get; set; }
    [JsonProperty("response")]
    public string Response { get; set; }
    [JsonProperty("response_type")]    
    public string ResponseType { get; set; }
    [JsonProperty("time_stamp")]
    public DateTime Timestamp { get; set; }
    [JsonProperty("trans_id")]
    public string TransactionId { get; set; }
    [JsonProperty("total_amount")]    
    public double TotalAmount { get; set; }
    [JsonProperty("discount")]
    public double Discount { get; set; }
}

public class TransactionWrapper
{
    [JsonProperty("trn")]
    public Transaction Transaction { get; set; }
}

class Test
{
    static void Main(string[] args)
    {
        string json = "{\"trn\":{\"visited_date\":\"2015-04-05\",\"party_code\":\"8978a1bf-c88b-11e4-a815-00ff2dce0943\",\"response\":\"Reason 5\",\"response_type\":\"NoOrder\",\"time_stamp\":\"2015-04-05 18:27:42\",\"trans_id\":\"8e15f00b288a701e60a08f968a42a560\",\"total_amount\":0.0,\"discount\":0.0}}";
        var wrapper = JsonConvert.DeserializeObject<TransactionWrapper>(json);
        Console.WriteLine(wrapper.Transaction.PartyCode);
    }
}

请注意我是如何使用该[JsonProperty]属性来允许属性名称本身是.NET的惯用语,但仍然可以正确使用JSON属性名称.我也改变了Transaction和的类型VisitedDate.最后,它有点令人担忧,total_amount并且discount是double价值 - 这真的不适合货币价值.不幸的是,您可能无法控制它.