通过与其他对象值匹配来更新对象取决于 C# 中的条件

Question

我有如下所示的课程

public class Channels
    {
        internal string CallerExt { get; set; }
        internal string ChannelName { get; set; }
        internal string CalleeExt { get; set; }

        public Channels(string CallerExt, string ChannelName, string CalleeExt)
        {
            this.CallerExt = CallerExt;
            this.ChannelName = ChannelName;
            this.CalleeExt = CalleeExt;
        }
    }

如果所有值都是新的，我想添加 Channel 对象的列表，如果 CallerExt 和 CaleeExt 已经存在于同一个对象中，那么 ChannelName 应该使用同一个对象的新值进行更新?

我设法找到包含 CallerExt 和 CalleeExt 值与新值匹配的对象，如下所示：

public static List<Channels> activeChannels = new List<Channels>();

if (!string.IsNullOrWhiteSpace(caller) && !string.IsNullOrWhiteSpace(now) && !string.IsNullOrWhiteSpace(callee))
{
    var recentChannel = activeChannels.FirstOrDefault(c => c.CallerExt == caller && c.CalleeExt == callee);
}

但我不确定如何使用新的频道名称更新该特定对象？提前感谢您的帮助..

Answer 1

感谢那些试图回答我的问题的人，解决方案对我有用

if (!string.IsNullOrWhiteSpace(caller) && !string.IsNullOrWhiteSpace(now) && !string.IsNullOrWhiteSpace(callee))
{
    var recentChannel = activeChannels.FirstOrDefault(c => c.CallerExt == caller && c.CalleeExt == callee);
    if (recentChannel != null)
        recentChannel.ChannelName = now;
}                                      

Answer 2

你可以试试这种方式，现场演示here

using System;
using System.Collections.Generic;
using System.Linq;

public class Program
{
    public static void Main()
    {
        var listOfChanels = new List<Channels>{ new Channels("1", "1", "1")};

        UpdateOrAdd(listOfChanels, new Channels("1", "2", "1"));
        UpdateOrAdd(listOfChanels, new Channels("2", "2", "2"));
        UpdateOrAdd(listOfChanels, new Channels("2", "3", "3"));

        foreach(var item in listOfChanels)
            Console.WriteLine(item.CalleeExt + item.CallerExt + item.ChannelName);
    }

    private static void UpdateOrAdd(List<Channels> list, Channels newObject)
    {
        var item = list.FirstOrDefault(p => p.CalleeExt == newObject.CalleeExt && p.CallerExt == newObject.CallerExt);

        if(item == null){
            list.Add(newObject);
        }else{
            item.ChannelName = newObject.ChannelName;
        }
    }

    public class Channels
    {
        internal string CallerExt { get; set; }
        internal string ChannelName { get; set; }
        internal string CalleeExt { get; set; }

        public Channels(string CallerExt, string ChannelName, string CalleeExt)
        {
            this.CallerExt = CallerExt;
            this.ChannelName = ChannelName;
            this.CalleeExt = CalleeExt;
        }
    }
}