80

我有一个字符串,我想从中获取一些值。

我的字符串看起来像:

字符串1:

"{\r\n   \"id\": \"100000280905615\",
 \r\n \"name\": \"Jerard Jones\",
 \r\n   \"first_name\": \"Jerard\",
 \r\n   \"last_name\": \"Jones\",
 \r\n   \"link\": \"https://www.facebook.com/Jerard.Jones\",
 \r\n   \"username\": \"Jerard.Jones\",
 \r\n   \"gender\": \"female\",
 \r\n   \"locale\": \"en_US\"\r\n}"

字符串2:

"{\r\n   \"id\": \"100000390001929\",
  \r\n   \"name\": \"\\u05d1\\u05d2\\u05e8\\u15dc\\u25d9 \\u05d1\\u05e8\\u05d5\\u05e9\",
  \r\n   \"first_name\": \"\\u05d4\\u05d2\\u05e7\\u02dc\\u05d9\",
  \r\n   \"last_name\": \"\\u05d1\\u05e8\\u05d5\\u05e9\",
  \r\n   \"link\": "https://www.facebook.com/people/\\u05d2\\u05d1\\u05e@\\u05dc\\u05d9-\\u05d1\\u05e8\\u05d4\\u05e9/100000390001929\",
  \r\n   \"gender\": \"female\",
  \r\n   \"locale\": \"he_IL\"\r\n}"

不幸的是,在某些情况下,字符串将采用相同的概念,但没有一些参数:

字符串3:

"{\r\n   \"id\": \"100000390001929\",
  \r\n   \"last_name\": \"\\u05d1\\u05e8\\u05d5\\u05e9\",
  \r\n   \"gender\": \"female\",
  \r\n   \"locale\": \"he_IL\"\r\n}"

我怎样才能得到:id, first_name, last_name, gender,的值locale

任何帮助表示赞赏!

4

5 回答 5

141

您的字符串是 JSON 格式的,因此您需要将其解析为对象。为此,您可以使用JSON.NET

下面是一个关于如何将 JSON 字符串解析为动态对象的示例:

string source = "{\r\n   \"id\": \"100000280905615\", \r\n \"name\": \"Jerard Jones\",  \r\n   \"first_name\": \"Jerard\", \r\n   \"last_name\": \"Jones\", \r\n   \"link\": \"https://www.facebook.com/Jerard.Jones\", \r\n   \"username\": \"Jerard.Jones\", \r\n   \"gender\": \"female\", \r\n   \"locale\": \"en_US\"\r\n}";
dynamic data = JObject.Parse(source);
Console.WriteLine(data.id);
Console.WriteLine(data.first_name);
Console.WriteLine(data.last_name);
Console.WriteLine(data.gender);
Console.WriteLine(data.locale);

快乐编码!

于 2013-07-12T14:48:56.227 回答
22

以下代码对我有用。

用途:

using System.IO;
using System.Net;
using Newtonsoft.Json.Linq;

代码:

 using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
                {
                    using (Stream responseStream = response.GetResponseStream())
                    {
                        using (StreamReader responseReader = new StreamReader(responseStream))
                        {
                            string json = responseReader.ReadToEnd();
                            string data = JObject.Parse(json)["id"].ToString();
                        }
                    }
                }

//json = {"kind": "ALL", "id": "1221455", "longUrl": "NewURL"}
于 2016-08-02T07:46:58.120 回答
17

我的弦

var obj = {"Status":0,"Data":{"guid":"","invitationGuid":"","entityGuid":"387E22AD69-4910-430C-AC16-8044EE4A6B24443545DD"},"Extension":null}

以下代码获取指导:

var userObj = JObject.Parse(obj);
var userGuid = Convert.ToString(userObj["Data"]["guid"]);
于 2019-03-20T11:11:40.670 回答
7

像这样创建一个类:

public class Data
{
    public string Id {get; set;}
    public string Name {get; set;}
    public string First_Name {get; set;}
    public string Last_Name {get; set;}
    public string Username {get; set;}
    public string Gender {get; set;}
    public string Locale {get; set;}
}

(我不是 100% 确定,但如果这不起作用,你将需要 use[DataContract][DataMember]for DataContractJsonSerializer。)

然后创建JSonSerializer

private static readonly XmlObjectSerializer Serializer = new DataContractJsonSerializer(typeof(Data));

并反序列化对象:

// convert string to stream
byte[] byteArray = Encoding.UTF8.GetBytes(contents);
using(var stream = new MemoryStream(byteArray))
{
    (Data)Serializer.ReadObject(stream);
}
于 2013-07-12T14:51:55.567 回答
2

.NET 6 版本使用System.Text.Json

using System;
                    
public class Program
{
    public static void Main()
    {
        var jsonString = @"{ ""id"" : 123 }";
        
        //parse it
        var yourObject = System.Text.Json.JsonDocument.Parse(jsonString);
        //retrieve the value
        var id= yourObject.RootElement
                          .GetProperty("id");
        
        Console.WriteLine(id);
    }
}
于 2021-12-16T06:26:01.100 回答