public void clear()
{
TextBox9.Clear();
TextBox7.Clear();
TextBox15.Clear();
TextBox13.Clear();
TextBox11.Clear();
TextBox10.Clear();
comboBox1.Text = "";
comboBox2.Text = "";
}
protected void TextBox5_TextChanged(object sender, System.EventArgs e)
{
try
{
float a = float.Parse(TextBox17.Text);
float b = float.Parse(TextBox5.Text);
TextBox18.Text = (a * b).ToString();
TextBox15.Focus();
}
catch (Exception we)
{ }
}