将字符串数组转换为枚举

Question

I am binding an enum to a property grid like this:

public enum myEnum
{
    Ethernet,
    Wireless,
    Bluetooth
}

public class MyClass
{
    public MyClass()
    {
        MyProperty = MyEnum.Wireless;
    }

    [DefaultValue(MyEnum.Wireless)]
    public MyEnum MyProperty { get; set; }
}

public Form1()
{
    InitializeComponent();
    PropertyGrid pg = new PropertyGrid();
    pg.SelectedObject = new MyClass();
    pg.Dock = DockStyle.Fill;
    this.Controls.Add(pg);
}

My problem: I get data on the fly when the program is running. I read the network adapter then store adapter names to myArray like this:

string[] myArray = new string[] { };
myArray[0] = "Ethernet";
myArray[1] = "Wireless";
myArray[2] = "Bluetooth";

Is possible convert myArray to myEnum on the fly using c#? Thank You.

Answer 1

Sure! This is all you need:

IEnumerable<myEnum> items = myArray.Select(a => (myEnum)Enum.Parse(typeof(myEnum), a));

Answer 2

You'll want to use Enum.Parse : http://msdn.microsoft.com/en-us/library/essfb559.aspx

MyProperty = (myEnum)Enum.Parse(typeof(myEnum), myArray[0]);

How you'll want to use that with your array I guess is up to your needs.

EDIT: By any chance, is it feasible to store your adapter names to your array as enumerations in the first place? Is there some reason the array must be strings?

Answer 3

If your source data is not something entirely reliable, you may want to consider converting only the items that can actually be parsed, using TryParse() and IsDefined() .

Getting an array of myEnums from an array of strings can be performed by the following code:

myEnum [] myEnums = myArray
    .Where(c => Enum.IsDefined(typeof(myEnum), c))
    .Select(c => (myEnum)Enum.Parse(typeof(myEnum), c))
    .ToArray();

Note that IsDefined() only works with a single enumerated value. If you have a [Flags] enum, combinations fail the test.

Answer 4

You do not have to use Parse if you want to get the name of the enum's value. Don't use .ToString() , use this instead. For example if I want to return Ethernet I would do the following:

public enum myEnum
{
    Ethernet,
    Wireless,
    Bluetooth
}

In your main class add this line of code:

var enumName = Enum.GetName(typeof(myEnum), 0); //Results = "Ethernet"

If you want to enumerate over the Enum Values you could do this to get the values:

foreach (myEnum enumVals in Enum.GetValues(typeof(myEnum)))
{
    Console.WriteLine(enumVals);//if you want to check the output for example
}

Answer 5

在循环中为数组中的每个元素使用Enum.Parse 。