Question

I have an custom UserControl I created

public class MyObject : UserControl
{
    public MyObject()
    {

    }
    public bool IsFinished { get; set; }
}

I added lets say 10(will be dynamic) MyObject‘s to a StackPanel and every other item i set IsFinished to true.

private void DoSomething()
{
    StackPanel panel = new StackPanel();
    for (int i = 0; i <= 10; i++)
    {
        int rem = 0;
        Math.DivRem(i, 2, out rem);
        MyObject newObj = new MyObject();
        if (rem == 0)
        {
            newObj.IsFinished = true;
        }
        panel.Children.Add(newObj);
    }
}

Now I can add the following and get the answer I am looking for (5)

int FinishedItems = 0;
foreach (object o in panel.Children)
{
    if (o.GetType() == typeof(MyObject))
    {
        if (((MyObject)o).IsFinished)
        {
            FinishedItems++;
        }
    }
}

2 Questions:

A. Is there a more eloquent way? maybe with Linq I’m still learning how to use that. From what I understand, that is what LINQ technically does.

B. Am I wrong about LINQ?

Answer 1

So you want to count the finished items:

int FinishedItems = panel.Children.OfType<MyObject>()
                         .Count(mo => mo.IsFinished);