private void HasAValueBeenEnteredButton_Click(object sender, EventArgs e)
{
if (EnterAValueTextBox.Text == String.Empty)
{
MessageBox.Show("Go back and enter a value...");
EnterAValueTextBox.Text = String.Empty;
EnterAValueTextBox.Focus();
return;
}
else
{
HasAValueBeenEnteredLabel.Text = "Yes!";
}
}
private void IsTheValueTheLetterAButton_Click(object sender, EventArgs e)
{
if (EnterAValueTextBox.Text == String.Empty)
{
MessageBox.Show("Go back and enter a value...");
EnterAValueTextBox.Text = "";
EnterAValueTextBox.Focus();
return;
}
else if (EnterAValueTextBox.Text == "A" || EnterAValueTextBox.Text == "a")
{
IsTheValueTheLetterALabel.Text = "Yes.";
}
else
{
IsTheValueTheLetterALabel.Text = "No.";
}
}
private void IsTheValueANumberButton_Click(object sender, EventArgs e)
{
double isDouble;
if (EnterAValueTextBox.Text == String.Empty)
{
MessageBox.Show("Go back and enter a value...");
EnterAValueTextBox.Text = "";
EnterAValueTextBox.Focus();
return;
}
else if (Double.TryParse(EnterAValueTextBox.Text, out isDouble))
{
IsTheValueANumberLabel.Text = "Yes.";
}
else
{
IsTheValueANumberLabel.Text = "No.";
}
}