将 JSON 字符串数组转换为 c# 列表对象，为列表中模型的每个字段返回"null"值

Question

我有字符串格式的JSON数组的列表，然后尝试在C＃模型列表中转换。

我正在使用以下代码行，但其返回 null 为每个模型字段的值。它在" ObjectList.Count.Count"行中显示正确的计数，但是当调试列表阵列时，其显示" null"显示为" null"每个模型字段的值。

using System;
using System.Collections.Generic;
using Newtonsoft.Json;
public partial class TestPage : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
         ProfileDetailViewModel viewModel = new ProfileDetailViewModel();
        viewModel.ProfileDetailModelList = new List<ProfileDetailModel>();
        string content = @"[{""AccountNumber"":""1"",""CompressedAddress"":""1,  TEST,  READING,  Postcode"",""MType"":""10"",""BillNotification"":""Y"",""NewBillAlert"":""N"",""AccountType"":""1234568""}]";
        List<ProfileDetailModel> objectList = JsonConvert.DeserializeObject<List<ProfileDetailModel>>(content);
        if (objectList.Count > 0)
        {
            viewModel.Success = true;
            viewModel.ProfileDetailModelList = objectList;
        }
    }
}
public class ProfileDetailViewModel
{
    public List<ProfileDetailModel> ProfileDetailModelList { get; set; }
    public bool Success { get; set; }
}
public class ProfileDetailModel
{
    string AccountNumber { get; set; }
    string CompressedAddress { get; set; }
    string MType { get; set; }
    string BillNotification { get; set; }
    string NewBillAlert { get; set; }
    string AccountType { get; set; }
}

Answer 1

profiledetailmodel上的所有属性都是私有的。您可以查看clases，structs等的默认可见性...此处：https：//msdn.microsoft.com/en-us/library/ba0a1yw2.aspx

只需添加public

public class ProfileDetailModel
{
       public string AccountNumber { get; set; }
       public string CompressedAddress { get; set; }
       public string MType { get; set; }
       public string BillNotification { get; set; }
       public string NewBillAlert { get; set; }
       public string AccountType { get; set; }
}    

Answer 2

您应该将所有属性更改为 public：

public class ProfileDetailModel
{
    public string AccountNumber { get; set; }
    public string CompressedAddress { get; set; }
    public string MType { get; set; }
    public string BillNotification { get; set; }
    public string NewBillAlert { get; set; }
    public string AccountType { get; set; }
}

Answer 3

将jsonproperty属性添加到所有属性中。请参阅下面的屏幕截图。

public class ProfileDetailModel
{
    [JsonProperty]
    string AccountNumber { get; set; }
    [JsonProperty]
    string CompressedAddress { get; set; }
    [JsonProperty]
    string MType { get; set; }
    [JsonProperty]
    string BillNotification { get; set; }
    [JsonProperty]
    string NewBillAlert { get; set; }
    [JsonProperty]
    string AccountType { get; set; }
}