Using C# Count() with a function

Question

I'm trying to figure out how many times the maximum value of an array occurs within the array by using Linq's.Count() with a predicate inside. However, I don't fully understand how to do it. From reading the MSDN's scant example I thought I understood, but apparently not!

This is what I thought of:

string[] test = { "1", "2", "3", "4", "4" };
string max = test.Max();
Label1.Text = test.Count(p => p == max);

But that did not work. So I tried changing max to an integer to see if that would work, but that did not work either.

Answer 1

You could use the Where function to filter first then count:

Label1.Text = test.Where(p => p == max).Count().ToString();

Answer 2

Using Count(predicate) is OK. You just need to convert the return value (which is an integer) to string.

Label1.Text = test.Count(p => p == max).ToString();

Answer 3

        int[] test = { 2, 45, 3, 23, 23, 4, 2, 1, 1, 1, 1, 23, 45, 45, 45 };
        int count = test.Count(i => i == test.Max());

Now you have the count which is your final count. Makes more sense with an int collection. Now to display it, you can just call ToString() on count.

Answer 4

Try something like:

Label1.Text = test.Where(t => t == test.Max()).Count().ToString();