//**************************************
//Procedure: Dispose
//**************************************
private void DisposeForm()
{
rdoCircle.Checked = true;
txtVolume.Clear();
txtArea.Clear();
txtCircumference.Clear();
txtHeight.Clear();
txtRadius.Clear();
btnDefinition.Enabled = false;
btnVolume.Enabled = false;
btnDispose.Enabled = false;
txtError.Text = "";
Circles = null;
Cylinder = null;
}
private void btnNew_Click(object sender, EventArgs e)
{
if (rdoCircle.Checked)
{
if (txtRadius.Text.Trim().Length > 0)
{
decimal decRad;
if (Circles == null)
{
try
{
decRad = Convert.ToDecimal(txtRadius.Text);
Circles = new clsCircle(decRad);
}
catch (Exception ex)
{
txtError.Text = "Radius must be numeric." + ex.Message;
}
}
else
{
txtError.Text = "Circle already exists.";
}
btnArea.Enabled = true;
btnCircumference.Enabled = true;
btnDefinition.Enabled = true;
btnDispose.Enabled = true;
txtCircumference.Text = Circles.Circumference().ToString();
txtArea.Text = Circles.Area().ToString();
}
else
{
txtError.Text = "Radius must be greater then zero.";
}
}
else
{
if (txtRadius.Text.Trim().Length > 0 && txtHeight.Text.Trim().Length > 0)
{
decimal decRad;
decimal decHgt;
if (Cylinder == null)
{
try
{
decHgt = Convert.ToDecimal(txtHeight.Text);
decRad = Convert.ToDecimal(txtRadius.Text);
Cylinder = new clsCylinder(decRad, decHgt);
}
catch (Exception ex)
{
txtError.Text = "Radius and Height must be numeric." + ex.Message;
}
}
else
{
txtError.Text = "Cylinder already exists.";
}
btnArea.Enabled = true;
btnCircumference.Enabled = true;
btnDefinition.Enabled = true;
btnDispose.Enabled = true;
btnVolume.Enabled = true;
txtCircumference.Text = Cylinder.Circumference().ToString();
txtArea.Text = Cylinder.Area().ToString();
txtVolume.Text = Cylinder.Volume().ToString();
}
else
{
txtError.Text = "Radius and Height must be greater then zero.";
}
}
}
