Is there a better way to determine if a string can be an integer other than try/catch?

Question

I needed a function that simply checks if a string can be converted to a valid integer (for form validation).

After searching around, I ended up using a function I had from 2002 which works using C#1 (below).

However, it just seems to me that although the code below works, it is a misuse of try/catch to use it not to catch an error but to determine a value.

Is there a better way to do this in C#3?

public static bool IsAValidInteger(string strWholeNumber)
{
    try
    {
        int wholeNumber = Convert.ToInt32(strWholeNumber);
        return true;
    }
    catch
    {
        return false;
    }
}

Answer:

John's answer below helped me build the function I was after without the try/catch. In this case, a blank textbox is also considered a valid "whole number" in my form:

public static bool IsAValidWholeNumber(string questionalWholeNumber)
{
    int result;

    if (questionalWholeNumber.Trim() == "" || int.TryParse(questionalWholeNumber, out result))
    {
        return true;
    }
    else
    {
        return false;
    }
}

Answer 1

if (int.TryParse(string, out result))
{
    // use result here
}