1. AB form1 Multiplication textBox1 12 textBox2 34 textBox3
408 (readonly)
textBox4-8
TextAlign (right)
label1-2
_____
button1
Calculate
textBox4, …, textBox8
by Szeto CY
Visual C# 2008

2. 雙按 (button1)，並加入以下程式碼：
文字轉數字
private void button1_Click(object sender, EventArgs e) {
int a, b, c;
textBox4.Text = textBox1.Text;
textBox5.Text = textBox2.Text;
a = int.Parse(textBox1.Text);
b = int.Parse(textBox2.Text);
c = a * b;
textBox3.Text = c.ToString();
textBox8.Text = textBox3.Text;
c = a * (b/10)*10;
textBox6.Text = c.ToString();
c = a * (b%10);
textBox7.Text = c.ToString(); }
數字轉文字
by Szeto CY
Visual C# 2008