从字符串中提取特定数据的简单方法?

时间:2018-01-22 23:59:43

标签: c#

处理提取从

下载的数据的方法
Webclient.Downloadstring();

为此,我将使用常规字符串作为示例。

通常下载的字符串为:

var data = "{\"err\":[],\"msg\":[],\"state\":null," +
                  "rec\":{\"Vin\":\"1ABC2DEF3GH45678\"," +
                  "\"REG\":\"ST-ABC123\",\"int\":\"12345678\"," +
                  "\"Make\":\"GMC\",\"Model\":\"YUKON\"," +
                  "\"Type\":\"SUV\",\"Color\":\"black metallic\",";

我想要的信息是Vin,Registration,ID(int),Make,Model,Color等。

我接近这个的方式如下。

    public class Program
{
    public static void Main(string[] args)
    {


        var data = "{\"err\":[],\"msg\":[],\"state\":null," +
                  "rec\":{\"Vin\":\"1ABC2DEF3GH45678\"," +
                  "\"REG\":\"ST-ABC123\",\"int\":\"12345678\"," +
                  "\"Make\":\"GMC\",\"Model\":\"YUKON\"," +
                  "\"Type\":\"SUV\",\"Color\":\"black metallic\",";

        data = doc.Replace('{', ' ');
        data = doc.Replace('"', ' ');
        data = doc.Replace('}', ' ');
        var sub = data.Split(':', ',');

        for(int i = 0; i < sub.Length; i++)
        {
            sub[i] = sub[i].Trim();

            /*Console.WriteLine("{0} : {1}", i, sub[i]);
            Outputs :
            0 : err
            1 : []
            2 : msg
            3 : []
            4 : state
            5 : null
            6 : rec
            7 : Vin
            8 : 1ABC2DEF3GH45678
            9 : REG
            10 : ST-ABC123
            11 : int
            12 : 12345678
            13 : Make
            14 : GMC
            15 : Model
            16 : YUKON
            17 : Type
            18 : SUV
            19 : Color
            20 : black metallic
            21 : 
            */
        }

        Vehicle vehicle = new Vehicle(sub[8], sub[10], sub[12], sub[14], sub[16], sub[18], sub[20]);
    }
}

public class Vehicle
{
    public string Vin { get; set; }
    public string Registration { get; set; }
    public string ID { get; set; }
    public string Make { get; set; }
    public string Model { get; set; }
    public string VehicleType { get; set; }
    public string Color { get; set; }
    public string Nav { get; set; }
    public string Transmission { get; set; }

    public Vehicle(string _Vin, string _Reg, string _ID, string _Make, string _Model, string _Type, string _Color)
    {
        this.Vin = _Vin;
        this.Registration = _Reg;
        this.ID = _ID;
        this.Make = _Make;
        this.Model = _Model;
        this.VehicleType = _Type;
        this.Color = _Color;
    }
}

我是以正确的方式接近这个吗?有更简单的方法吗?而且就车辆类别来说它会如此好吗?

它对我有用,只是想在我的代码中输入一些内容。

1 个答案:

答案 0 :(得分:3)

假设您刚从您向我们展示的数据中遗漏了几个字符,将这个JSON解析为C#对象非常容易。例如,首先我们从一些类开始:

public class Data
{
    public List<string> err { get; set; }
    public List<string> msg { get; set; }
    public string state { get; set; }
    public Rec rec { get; set; }
}

public class Rec
{
    public string Vin { get; set; }
    public string REG { get; set; }
    public string @int { get; set; }
    public string Make { get; set; }
    public string Model { get; set; }
    public string Type { get; set; }
    public string Color { get; set; }
}

现在使用Newtonsoft.JSON

var result = JsonConvert.DeserializeObject<Data>(data);

注意:我假设为errmsg,因为stringstate的数组也是string

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