/// <summary>
/// Calculates the BMI value, writes the result in BMITextBox.Text and chebge the color of the BMI Scale accordingly
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void CalculateBMIButton_Click(object sender, EventArgs e)
{
// Holds the calculated BMI value
double BMI;
// Makes sure BMITextBox.Font size is 20
BMITextBox.Font = new Font("Microsoft Sans Serif", 20);
try
{
if (double.Parse(WeightTextBox.Text) == 0 || double.Parse(HeightTextBox.Text) == 0)
{
throw new FormatException();
}
// BMI value calculation
BMI = double.Parse(WeightTextBox.Text) / Math.Pow(double.Parse(HeightTextBox.Text), 2.0);
// Adjusts the calculated BMI value if Imperial units are chosen
if (ImperialRadioButton.Checked)
{
BMI *= 703;
}
// Resets the color of each label in BMIScaleTableLayoutPanel to system default
ResetScaleColors();
// Changes the BackColor of the specific label in BMIScaleTableLayoutPanel according to the calculated BMI value
if (BMI < 18.5)
{
UnderweightLabel1.BackColor = Color.LightCoral;
UnderweightLabel2.BackColor = Color.LightCoral;
}
else if (BMI >= 18.5 && BMI <= 24.9)
{
NormalLabel1.BackColor = Color.LawnGreen;
NormalLabel2.BackColor = Color.LawnGreen;
}
else if (BMI >= 25 && BMI <= 29.9)
{
OverweightLabel1.BackColor = Color.LightCoral;
OverweightLabel2.BackColor = Color.LightCoral;
}
else if (BMI >= 30)
{
ObeseLabel1.BackColor = Color.LightCoral;
ObeseLabel2.BackColor = Color.LightCoral;
}
// Writes the calculated BMI value to BMITextBox.Text formated with 2 decimal places
BMITextBox.Text = BMI.ToString("f1");
// Hides ButtonsTableLayoutPanel
ButtonsTableLayoutPanel.Visible = false;
// Shows BMIScaleTableLayoutPanel
BMIScaleTableLayoutPanel.Visible = true;
}// Handles FormatException when WeightTextBox.Text or HeightTextBox.Text is empty string and the function tries to parse it
catch (FormatException)
{
BMITextBox.Font = new Font("Microsoft Sans Serif", 11);
BMITextBox.Text = "Invalid values";
}
catch (Exception)
{
throw;
}
}
/// <summary>
/// This event displays the BMI result and the scale after calculations.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Calculate_Click(object sender, EventArgs e)
{
if (Imperial.Checked == true)
{
double height = double.Parse(HeightText.Text);
double Weight = double.Parse(WeightText.Text);
double BMI;
BMI = (Weight * 703) / (height * height);
BMIResults.Text = BMI.ToString();
if (BMI <= 18.5)
{
result.Text = "Underweight";
}
else if (BMI > 18.5 && BMI <= 24.9)
{
result.Text = "Normal";
}
else if (BMI > 25 && BMI <= 29.9)
{
result.Text = "Overweight";
}
else if (BMI >= 30)
{
result.Text = "Obese";
}
}
if (Metric.Checked == true)
{
double height = double.Parse(HeightText.Text);
double Weight = double.Parse(WeightText.Text);
double BMI;
BMI = (Weight) / (height * height);
BMIResults.Text = BMI.ToString();
if (BMI <= 18.5)
{
result.Text = "Underweight";
}
else if (BMI > 18.5 && BMI <= 24.9)
{
result.Text = "Normal";
}
else if (BMI > 25 && BMI <= 29.9)
{
result.Text = "Overweight";
}
else if (BMI >= 30)
{
result.Text = "Obese";
}
}
}
