public static string GetMacQ(string rawValues)
    {
        return rawValues.Split('#')
        .Select(element =>
        {
            var value = element.Split('='); 
            return new 
            {
                Key = value[0],
                Value = value[1],
            };
        })
        .Where(element => element.Key.Equals("Mac Q")) 
        .Select(element => element.Value) 
        .FirstOrDefault();  
    }

This code is for splitting the strings, but the problem here is it does not return the value of the key

CodePudding user response：

Using Linq

Full example code

using System;
using System.Linq;

namespace License
{
    public class Utils
    {
        public static string GetMacQ(string rawValues)
        {
            return rawValues.Split("[##]")// Split the string with [##] separator. e.g. ["C=True", "V=True", "PAN=True", "Mac Q=3", "A=True"]
            .Select(element =>
            {
                var value = element.Split("="); //Split the string with = separator. e.g. / ["C", "True"] / ["PAN", "True"] / ["Mac Q", "3"]
                return new //Creating new anonymous object with Key and Value properties. e.g { Key : "Mac Q", Value: "3"}
                {
                    Key = value[0],
                    Value = value[1]
                };
            })
            .Where(element => element.Key.Equals("Mac Q")) //Filter elements with "Mac Q" key
            .Select(element => element.Value) //Select the value
            .FirstOrDefault();  //Get the first ocurrence or null.
        }

    }

    public class Program
    {
        public static void Main(string[] args)
        {
            var rawValues = "C=True[##]V=True[##]PAN=True[##]Mac Q=3[##]A=True";
            string MacQElement = Utils.GetMacQ(rawValues);
            Console.WriteLine(MacQElement == null ? @"""Mac Q"" value not found." : MacQElement);
            Console.ReadLine();

        }
    }
}

Output

3

CodePudding user response：

Here is the code:

// The string to be parsed.As can be seen in the string, this is some key/value pairs, which are separated by [##]
var subkey = "C=True[##]V=True[##]PAN=True[##]Mac Q=3[##]A=True";

// Here we split the string by the separator [##]
var pairs = subkey.Split("[##]");

// Now let's create a storage to store the key/values
var dic = new Dictionary<string, string>();

foreach (var pair in pairs)
{
    // The keys and values are separated by "=". So we split them by the separator.
    var split = pair.Split("=");
    // Now let's add the to the storage
    dic.Add(split[0], split[1]);
}

// OK. done. Let's verify the result.
foreach(var item in dic)
{
    Console.WriteLine($"{item.Key}={item.Value}");
}