我有一个字符串：
[
{
"key": "key1",
"value": "{'Time':'15:18:42','Data':'15:18:42'}",
"duration": 5
},
{
"key": "key1",
"value": "{'Time':'15:18:42','Data':'15:18:42'}",
"duration": 5
}
]
我的类在模型：
public class CPacket
{
public string key { get; set; }
public string value { get; set; }
public int duration { get; set; }
}
我使用 Json.Net，我想将下面的字符串转换为 Json Oject。
CPacket c = JsonConvert.DeserializeObject<CPacket>(strPostData);
但它出错了：
“Newtonsoft”类型的异常。“Json . JsonSerializationException”出现在Newtonsoft.Json.dll中，但未在用户代码中处理< br >其他信息:无法将当前JSON数组(例如[1，2，3])反序列化为类型“QuoteAPI”。因为该类型需要JSON对象(例如{"name":"value"})来正确反序列化。
您的 JSON 表示 CPacket 对象的数组，而不仅仅是单个对象。您需要反序列化为列表。
List<CPacket> list = JsonConvert.DeserializeObject<List<CPacket>>(strPostData);
{
var url = "http://jsonplaceholder.typicode.com/posts";
var webClient = new WebClient();
var responseStr = webClient.DownloadString(url);
//JObject jResponse = JObject.Parse(responseStr);
JArray jArray = JArray.Parse(responseStr);
List<User> userList = new List<User>();
foreach (var item in jArray)
{
User user = new User();
user.UserID = Convert.ToInt32(item["userId"]);
user.ID = Convert.ToInt32(item["id"]);
user.Title = Convert.ToString(item["title"]);
user.Body = Convert.ToString(item["body"]);
userList.Add(user);
}
public partial class Search : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string url = "http://jsonplaceholder.typicode.com/posts";
var webClient = new WebClient();
var responseStr = webClient.DownloadString(url);
JArray jArray = JArray.Parse(responseStr);
List<Class1> userList = new List<Class1>();
foreach (var item in jArray)
{
Class1 user = new Class1();
user.userId = Convert.ToInt32(item["userId"]);
user.id = Convert.ToInt32(item["id"]);
user.title = Convert.ToString(item["title"]);
user.body = Convert.ToString(item["body"]);
userList.Add(user);
}
Repeater1.DataSource = userList;
Repeater1.DataBind();
var myClass = _download_serialized_json_data<List<Class1>>(url);
WebRequest request = WebRequest.Create(url);
WebResponse ws = request.GetResponse();
//Stream stream1 = response.GetResponseStream();
//StreamReader sr = new StreamReader(stream1);
//string strsb = sr.ReadToEnd();
//object objResponse = JsonConvert.DeserializeObject(strsb, JSONResponseType);
DataContractJsonSerializer jsonSerializer =
new DataContractJsonSerializer(typeof(List<Class1>));
object objResponse = jsonSerializer.ReadObject(ws.GetResponseStream());
List<Class1> jsonResponse
= objResponse as List<Class1>;
List<Class1> photos = (List<Class1>)jsonSerializer.ReadObject(ws.GetResponseStream());
}
private static T _download_serialized_json_data<T>(string url) where T : new()
{
using (var w = new WebClient())
{
var json_data = string.Empty;
// attempt to download JSON data as a string
try
{
json_data = w.DownloadString(url);
}
catch (Exception) { }
// if string with JSON data is not empty, deserialize it to class and return its instance
return !string.IsNullOrEmpty(json_data) ? JsonConvert.DeserializeObject<T>(json_data) : new T();
}
}
}
}
