如何使用Try and Catch设置值

Question

我如何尝试捕获内部Letter调用try catch Program？目前我使用bool作为验证器,但我想要任何假bool抛出错误并Program看到这个.

这样做的最佳方法是什么,因为目前Program无法判断属性是否设置错误.

Program.cs

        Letter a = new Letter();
        try
        {
            a.StoredChar = '2';
        }
        catch (Exception)
        {
            a.StoredChar = 'a';
        }
        // I want this to print 'a' because the '2' should throw a catch somehow
        // I don't know how to set this up.
        Console.WriteLine(a.StoredChar);

Letter.cs

    class Letter
    {
        char storedChar;

        public char StoredChar
        {
            set { validateInput(value);}
            get { return storedChar;}
        }

        bool validateInput(char x)
        {
            if ( ( (int)x >= 65 && (int)x <= 90 ) || ( (int)x >= 97 && (int)x <= 122 )  )
            {
                storedChar = x;
                return true;
            }
            else
            {
                return false;
            }
        }
    }

Answer 1

只需在Letter类中抛出异常.像这样的Smth:

private void validateInput(char x)
{
    if ( ( (int)x >= 65 && (int)x <= 90 ) || ( (int)x >= 97 && (int)x <= 122 )  )
    {
       storedChar = x;
    }
    else
    {
       throw new OutOfRangeException("Incorrect letter!");
    }
}