ex-22-03

Programming Csharp Source Code(代码) Programming Csharp Source Code

// Example 22-03: Implementing event handlers for the test Windows Form

private void btnAdd_Click(object sender, System.EventArgs e)
{
   double left = double.Parse(textBox1.Text);
   double right = double.Parse(textBox2.Text);
   label1.Text = axCalculator1.Add( ref left, ref right).ToString();
}

private void btnDivide_Click(object sender, System.EventArgs e)
{
   double left = double.Parse(textBox1.Text);
   double right = double.Parse(textBox2.Text);
   label1.Text = axCalculator1.Divide(ref left, ref right).ToString();
}

private void btnMultiply_Click(object sender, System.EventArgs e)
{
   double left = double.Parse(textBox1.Text);
   double right = double.Parse(textBox2.Text);
   label1.Text = axCalculator1.Multiply(ref left, ref right).ToString();
}

private void btnSubtract_Click(object sender, System.EventArgs e)
{
   double left = double.Parse(textBox1.Text);
   double right = double.Parse(textBox2.Text);
   label1.Text = axCalculator1.Subtract(ref left, ref right).ToString();
}