C# Day 2 / 100

// Reverses an input string and displays it in a text box.
// WinForms - create a new form with these controls:
// textboxes:  textInput, textOutput
// buttons:  buttonCopy, buttonClear, buttonProcess

using System;
using System.Windows.Forms;

namespace Reverse_A_String
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void ButtonProcess_Click(object sender, EventArgs e)
        {
            if (textInput.Text.Length < 2)
            {
                MessageBox.Show("Enter at least two characters and try again.");
                return;
            }

            string str = textInput.Text;
            textOutput.Text = Reverse(str);
            labelStatus.Text = "Processed";
        }

        public static string Reverse(string str)
        {
            char[] c = str.ToCharArray();
            Array.Reverse(c);
            str = string.Concat(c);
            return str;
        }

        private void ButtonClear_Click(object sender, EventArgs e)
        {
            textInput.Clear();
            textOutput.Clear();
            labelStatus.Text = ".....";
            textInput.Focus();
        }

        private void ButtonCopy_Click(object sender, EventArgs e)
        {
            try
            {
                Clipboard.SetText(textOutput.Text);
                labelStatus.Text = "Copied";
            }
            catch (Exception)
            {
                labelStatus.Text = "Error";
            }
        }

        private void TextOutput_TextChanged(object sender, EventArgs e)
        {
            labelStatus.Text = ".....";
        }
    }
}