Json 没有反序列化

Question

我正在使用 System.Text.Json。

我有以下型号：

public  class Contacts
{
    [JsonPropertyName("id")]
    public long Id { get; set; }
    [JsonPropertyName("name")]
    public string Name { get; set; } = string.Empty;
    [JsonPropertyName("paused")]
    public bool Paused { get; set; }
    [JsonPropertyName("type")]
    public string Type { get; set; } = string.Empty;
    [JsonPropertyName("owner")]
    public bool Owner {  get; set; }
    [JsonPropertyName("notification_targets")]
    public NotificationTargets? NotificationTargets { get; set; }
    [JsonPropertyName("teams")]
    public List<Teams>? Teams { get; set; }
}
public class NotificationTargets
{
    [JsonPropertyName("email")]
    public List<Email>? Email {  get; set; }
}
public class Email
{
    [JsonPropertyName("severity")]
    public string Severity { get; set; } = string.Empty;
    [JsonPropertyName("address")]
    public string Address { get; set; } = string.Empty;
}
public class Teams
{
    [JsonPropertyName("id")]
    public long Id { get; set; }
    [JsonPropertyName ("name")]
    public string Name { get; set; } = string.Empty;
}

我的 Json 是：

{
    "contacts": [
        {
            "id": 14960844,
            "name": "firstname test",
            "paused": false,
            "type": "user",
            "owner": true,
            "notification_targets": {
                "email": [
                    {
                        "severity": "HIGH",
                        "address": "[email protected]"
                    }
                ]
            },
            "teams": [
                {
                    "id": 804736,
                    "name": "Team 1"
                }
            ]
        }
    ]
}

以上内容存储在字符串变量中。

我只是打电话：

var myContacts = JsonSerializer.Deserialize<List<Contacts>>(myJsonString);

我不断收到以下错误：

System.Text.Json.JsonException：'无法转换 JSON 值 到 System.Collections.Generic.List`1[VTMShared.Models.Contacts]。小路： $ |行号: 0 |字节位置内联：1。'

我真的看不出这有什么问题。

Answer 1

您需要反序列化为

Root

并从

Contacts

实例中提取

Root

。

var root = JsonSerializer.Deserialize<Root>(json);
var contacts = root.Contacts;

public class Root
{
    [JsonPropertyName("contacts")]
    public List<Contact> Contacts { get; set; }
}

public  class Contact
{
    [JsonPropertyName("id")]
    public long Id { get; set; }
    [JsonPropertyName("name")]
    public string Name { get; set; } = string.Empty;
    [JsonPropertyName("paused")]
    public bool Paused { get; set; }
    [JsonPropertyName("type")]
    public string Type { get; set; } = string.Empty;
    [JsonPropertyName("owner")]
    public bool Owner {  get; set; }
    [JsonPropertyName("notification_targets")]
    public NotificationTargets? NotificationTargets { get; set; }
    [JsonPropertyName("teams")]
    public List<Teams>? Teams { get; set; }
}