how to calculate age ?

The following assumes that some-one born on 29 February in a leap year celebrates their birthday on 1 March of a non-leap year:

DateTime dateBorn;
bool isValid = DateTime.TryParse(textBox1.Text, out dateBorn);
if (isValid && dateBorn <= DateTime.Today)
{

int dt1 = dateBorn.Year * 372 + dateBorn.Month * 31 + dateBorn.Day;

DateTime today = DateTime.Today;

int dt2 = today.Year * 372 + today.Month * 31 + today.Day;

int age = (dt2 - dt1)/372;
label1.Text = age.ToString();
int yearDiff = today.Year - dateBorn.Year;
label2.Text = yearDiff.ToString();
}
else
{
MessageBox.Show("Textbox doesn't contain a valid date of birth. Please amend");
textBox1.Focus();
return;
}

1 Reply

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Vulpes13y ago
The following assumes that some-one born on 29 February in a leap year celebrates their birthday on 1 March of a non-leap year:

DateTime dateBorn;
bool isValid = DateTime.TryParse(textBox1.Text, out dateBorn);
if (isValid && dateBorn <= DateTime.Today)
{
int dt1 = dateBorn.Year * 372 + dateBorn.Month * 31 + dateBorn.Day;
DateTime today = DateTime.Today;
int dt2 = today.Year * 372 + today.Month * 31 + today.Day;
int age = (dt2 - dt1)/372;
label1.Text = age.ToString();
int yearDiff = today.Year - dateBorn.Year;
label2.Text = yearDiff.ToString();
}
else
{
MessageBox.Show("Textbox doesn't contain a valid date of birth. Please amend");
textBox1.Focus();
return;
}