Question

This is my code in ASP.Net C#

ArrayList myArrayList = new ArrayList();
            myArrayList.Add("Apple");
            myArrayList.Add("Banana");

            if (myArrayList.Contains("apple"))  // This returns false because Contains doesn't support a case-sensitive search
                statusLabel.Text = "ArrayList contains apple";

I get false , Since Apple not equals apple. I have even tried like

myArrayList.Contains("apple", StringComparer.OrdinalIgnoreCase)

But intellisense shows error. Is this really possible on ArrayList ?apple

Answer 1

If you are using .NET 1.1 because Generics aren’t available, you could do something like this:

bool contains = false;
for (int i = 0; i < myArrayList.Count && !contains; i++)
{
    contains = ((string)myArrayList[i]).ToUpper() == "APPLE";
}
if (contains)
{
    statusLabel.Text = "ArrayList contains apple";
}

Otherwise, using List<string> instead of ArrayList, then myArrayList.Contains("apple", StringComparer.OrdinalIgnoreCase) will work.

If you have .NET 2 + Generics available to you; then there really is no good reason to be using the ArrayList anymore.