private void button2_Click(object sender, EventArgs e)
{
CKreis kreis = new CKreis();
try
{
kreis.Flaeche = Convert.ToInt32(textBox1.Text);
richTextBox1.Text = kreis.Flaeche.ToString();
}
catch {
MessageBox.Show("insert value, please");
}
}
private void button1_Click(object sender, EventArgs e)
{
CKreis kreis = new CKreis();
try
{
kreis.Radius = System.Convert.ToInt32(textBox1.Text);
richTextBox1.Text = kreis.Radius.ToString();
}
catch {
MessageBox.Show("Error, insert value");
}
}
private void button3_Click(object sender, EventArgs e)
{
CKreis kreis = new CKreis();
if (textBox1.Text != "")
{
kreis.Umfang = Convert.ToDouble(textBox1.Text);
richTextBox1.Text = kreis.Umfang.ToString();
}
else
{
MessageBox.Show("Exception, insert value");
}
}