问题描述
我正在尝试通过 Zendesk v2 API 从控制台应用程序获取 Zendesk 票证，然后插入到 sql 数据库，但出现错误。
Newtonsoft.Json.JsonSerializationException：无法将当前 JSON 对象（例如 {"name":"value"}）反序列化为类型“System.Collections.Generic.List`1[ZenTrack.Class1+Ticket]”，因为类型需要一个 JSON 数组（例如 [1,2,3]）才能正确反序列化。
对于理解这一点的人来说，这个错误非常清楚......我不是那些人中的一员！ 我哪里做错了？
所以我的代码是这样的：
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using static ZenGet.Class1;
namespace ZenGet
{
class Program
{
static void Main(string[] args)
{
HttpClient client = new HttpClient();
client.BaseAddress = new Uri("https://myportal.zendesk.com/");
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Add("Authorization","Basic xxxxxxxxxxxxxxxxxxxxxx");
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
string path = "api/v2/tickets.json?page=1";
FileStream fs = new FileStream("c:\\Test.txt",FileMode.Create);
StreamWriter sw = new StreamWriter(fs);
try
{
HttpResponseMessage response = client.GetAsync(path).Result;
//Http Status code 200
if (response.IsSuccessstatusCode)
{
//Read response content result into string variable
string JSON = response.Content.ReadAsstringAsync().Result;
//Deserialize the string(JSON) object
var RootObjects = JsonConvert.DeserializeObject<List<Ticket>>(JSON);
foreach (var rootObject in RootObjects)
{
Console.WriteLine(rootObject.id + "-" + rootObject.subject + "-" + rootObject.description + "-" + rootObject.status);
// The sql insert goes here.
}
}
}
catch (Exception exception)
{
Console.Setout(sw);
Console.WriteLine($"Exception: {exception}");
}
sw.Close();
}
}
}
类看起来像这样：
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ZendeskApi_v2.Models.Tickets;
namespace ZenGet
{
class Class1
{
public class From
{
}
public class To
{
}
public class Source
{
[JsonProperty("from")]
public From from { get; set; }
[JsonProperty("to")]
public To to { get; set; }
[JsonProperty("rel")]
public object rel { get; set; }
}
public class Via
{
[JsonProperty("channel")]
public string channel { get; set; }
[JsonProperty("source")]
public Source source { get; set; }
}
public class Ticket
{
[JsonProperty("url")]
public string url { get; set; }
[JsonProperty("id")]
public int id { get; set; }
[JsonProperty("external_id")]
public object external_id { get; set; }
[JsonProperty("via")]
public Via via { get; set; }
[JsonProperty("created_at")]
public DateTime created_at { get; set; }
[JsonProperty("updated_at")]
public DateTime updated_at { get; set; }
[JsonProperty("type")]
public string type { get; set; }
[JsonProperty("subject")]
public string subject { get; set; }
[JsonProperty("raw_subject")]
public string raw_subject { get; set; }
[JsonProperty("description")]
public string description { get; set; }
[JsonProperty("priority")]
public string priority { get; set; }
[JsonProperty("status")]
public string status { get; set; }
[JsonProperty("recipient")]
public object recipient { get; set; }
[JsonProperty("requester_id")]
public object requester_id { get; set; }
[JsonProperty("submitter_id")]
public object submitter_id { get; set; }
[JsonProperty("assignee_id")]
public object assignee_id { get; set; }
[JsonProperty("organization_id")]
public object organization_id { get; set; }
[JsonProperty("group_id")]
public object group_id { get; set; }
[JsonProperty("collaborator_ids")]
public List<object> collaborator_ids { get; set; }
[JsonProperty("follower_ids")]
public List<object> follower_ids { get; set; }
[JsonProperty("email_cc_ids")]
public List<object> email_cc_ids { get; set; }
[JsonProperty("forum_topic_id")]
public object forum_topic_id { get; set; }
[JsonProperty("problem_id")]
public object problem_id { get; set; }
[JsonProperty("has_incidents")]
public bool has_incidents { get; set; }
[JsonProperty("is_public")]
public bool is_public { get; set; }
[JsonProperty("due_at")]
public object due_at { get; set; }
[JsonProperty("tags")]
public List<string> tags { get; set; }
[JsonProperty("custom_fields")]
public List<object> custom_fields { get; set; }
[JsonProperty("satisfaction_rating")]
public object satisfaction_rating { get; set; }
[JsonProperty("sharing_agreement_ids")]
public List<object> sharing_agreement_ids { get; set; }
[JsonProperty("fields")]
public List<object> fields { get; set; }
[JsonProperty("followup_ids")]
public List<object> followup_ids { get; set; }
[JsonProperty("brand_id")]
public object brand_id { get; set; }
[JsonProperty("allow_channelback")]
public bool allow_channelback { get; set; }
[JsonProperty("allow_attachments")]
public bool allow_attachments { get; set; }
}
public class Root
{
[JsonProperty("tickets")]
public Ticket[] Tickets { get; set; }
}
}
}
json 响应：
tickets: [
{
"url": "https://myportal.zendesk.com/api/v2/tickets/2.json","id": 2,"external_id": null,"via": {
"channel": "sample_ticket","source": {
"from": {},"to": {},"rel": null
}
},"created_at": "2020-12-09T07:20:17Z","updated_at": "2020-12-13T08:01:20Z","type": "incident","subject": "Jag behöver hjälp","raw_subject": "Jag behöver hjälp","description": "Hej,\nNågot dramatiskt har inträffat och jag behöver verkligen din hjälp.\nTack på förhand,\nKund\n","priority": "normal","status": "closed","recipient": null,"requester_id": 376279908200,"submitter_id": 376279896900,"assignee_id": 376279896900,"organization_id": null,"group_id": 360005730200,"collaborator_ids": [],"follower_ids": [],"email_cc_ids": [],"forum_topic_id": null,"problem_id": null,"has_incidents": false,"is_public": true,"due_at": null,"tags": [
"support-exempel","zendesk"
],"custom_fields": [],"satisfaction_rating": null,"sharing_agreement_ids": [],"fields": [],"followup_ids": [],"brand_id": 360002066200,"allow_channelback": false,"allow_attachments": true
}
]
next_page:
next_page:
prevIoUs_page:
prevIoUs_page:
count: 3
count: 3
我尝试更改行：
var RootObjects = JsonConvert.DeserializeObject(JSON);
到
动态而不是 var
并
动态 RootObjects = JsonConvert.DeserializeObject(JSON);
我的班级从
public class Source
{
public From from { get; set; }
public To to { get; set; }
public object rel { get; set; }
到
public class Source
{
[JsonProperty("from")] <-- added this
public From from { get; set; }
[JsonProperty("to")] <-- added this
public To to { get; set; }
[JsonProperty("rel")] <-- added this
public object rel { get; set; }
解决方法
您尝试将 json 对象反序列化为票证列表。但是您必须将其反序列化为包含票证列表的根对象：
变化：
var RootObjects = JsonConvert.DeserializeObject<List<Ticket>>(JSON);
致：
var RootObjects = JsonConvert.DeserializeObject<Root>(JSON);