Convert an array of object to a list of a class-CodePudding

I have an array of objects like:

object[]

All elements of the array if compatible with a type, that I will call

MyClass

How can I convert this object[] to a List ?

CodePudding user response：

You can use Linq to achive this:

using System;
using System.Linq;                  
public class Program
{
    public static void Main()
    {
        object[] l = new object[3];
        l[0] = new MyClass();
        l[1] = new MyClass();
        l[2] = new NotMyClass();
        var res = l.Where(e => e is MyClass).Cast<MyClass>();
        foreach(var e in res){
            Console.WriteLine(e.ToString());
        }
    }
}

public class MyClass{
}

public class NotMyClass{
    
}

CodePudding user response：

It depends on what you want to happen if your array contains an element that is not of type MyClass.

If you want that case to throw an exception, use:

var myList = myArray.Cast<MyClass>().ToList();

If you want to silently ignore all items that are not MyClass, use:

var myList = myArray.OfType<MyClass>().ToList();