如何将枚举值与consructor对象进行比较 [英] How to compare enum values with consructor objects

问题描述

我的枚举值是这样的

Hi,

I have enumerator values like this

public enum Buses
    {
        CANBusRed = 1,
        CANBusYellow = 2 ,
        CANBusGreen = 3 ,
        CANBusOrange = 4
    };

我有像这样的3个对象的构造函数

I have constructor with 3 objects in it like this

public class MsgIdTimeStampMap
    {
        string msgId;
        double timeStamp;
        public Buses Bus { get; set; }


        public string MsgId
        {
            get
            {
                if (!String.IsNullOrEmpty(msgId))
                    return msgId.ToUpper();
                else
                    return string.Empty;
            }

            set { msgId = value; }
        }

        public double TimeStamp
        {
            get
            {
                //Double.IsNullOrEmpty(timeStamp)
                    return timeStamp;
                //else
                //    return string.Empty;
            }

            set { timeStamp = value; }
        }

        public MsgIdTimeStampMap(Buses bus, string msgId, double timeStamp)
        {
            this.Bus = bus;
            this.msgId = msgId;
            this.timeStamp = timeStamp;
            
        }
        
    }

现在我需要将枚举值与构造函数的对象进行比较。但无法做到这一点

我正在尝试这样的事情

Now I need to compare enum values with object of constructor. But unable to do that
I am trying something like this

for (int m = 0; m < CANMsgIdList.Count; m++)
           {


               if (CANMsgIdList[m].Bus == ConsoleApplication13.Buses.CANBusRed)
               {
                   reds.Add(index);
               }
               index++;

           }
           List<double> times = new List<double>();


           foreach (var i in reds)
               if ((i < (index - 1)) && CANMsgIdList[i + 1].Bus == ConsoleApplication13.Buses.CANBusYellow)
               {
                   arrList3.Add(CANMsgIdList[i + 1].TimeStamp - CANMsgIdList[i].TimeStamp);
               }
           double av = times.Sum() / times.Count;

任何人都可以帮我解决这个问题????



谢谢

John

Can anyone help me in solving this????

Thanks
John

推荐答案

转换和比较枚举和字符串：



1.如果可能的话，你想要避免这种情况：理想情况下，你到处都在使用Enum，而且永远不必转换它。但是，如果你必须这样做：



2. if（someString.Equals（Buses.CANBusYellow.ToString（））{// do stuff}



这是最糟糕的方式：需要转换。



3.使用.NET 2.0你有Enum .Parse [ ^ ];在.NET 4.0中，您可以使用Enum.TryParse [ ^ ]。



我强烈建议你使用Enum.TryParse：

Converting and Comparing Enum and string:

1. if at all possible, you want to avoid this: ideally you'd be using the Enum everywhere, and never have to convert it. But, if you have to do it:

2. if(someString.Equals(Buses.CANBusYellow.ToString()) { // do stuff }

This is the worst way to do it: requires conversion.

3. with .NET 2.0 you have Enum.Parse [^]; in .NET 4.0 you can use Enum.TryParse [^].

I strongly suggest you use Enum.TryParse:

Buses theBus;

if (Enum.TryParse(someString, out theBus)) 
{
     switch (theBus)
     {
        case Buses.CANBusYellow:
           // do yellow stuff
           break;
        case Buses.CANBusGreen:
           // do green stuff
           break;
        // and so on
     }
}
else
{
     MessageBox.Show(someString + " is not a bus.");
}

注意：此代码是从内存中写入的，未经过测试。

Note: this code is written from memory, and is not tested.

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