[C#] Switch-case ตรวจสอบวัน+เปลี่ยนสี bg

โค้ด

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btCheckDay_Click(object sender, EventArgs e)
        {
            int day = (int)DateTime.Now.DayOfWeek;
            switch (day)
            {
                case 0:
                    MessageBox.Show("Today is Sunday", DateTime.Now.ToShortDateString());
                    this.BackColor = Color.Red;
                    break;
                case 1:
                    MessageBox.Show("Today is Monday", DateTime.Now.ToShortDateString());
                    this.BackColor = Color.Yellow;
                    break;
                case 2:
                    MessageBox.Show("Today is Tuesday", DateTime.Now.ToShortDateString());
                    this.BackColor = Color.Pink;
                    break;
                case 3:
                    MessageBox.Show("Today is Wednesday", DateTime.Now.ToShortDateString());
                    this.BackColor = Color.Green;
                    break;
                case 4:
                    MessageBox.Show("Today is Thursday", DateTime.Now.ToShortDateString());
                    this.BackColor = Color.Orange;
                    break;
                case 5:
                    MessageBox.Show("Today is Friday", DateTime.Now.ToShortDateString());
                    this.BackColor = Color.SkyBlue;
                    break;
                case 6:
                    MessageBox.Show("Today is Satuaday", DateTime.Now.ToShortDateString());
                    this.BackColor = Color.Purple;
                    break;
            }
        }
    }
}

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