Question

I am trying to complete Chapter 9 exercise 9 in C# Programming: From Problem Analysis to Program Design. I have both first name and last name textboxes, an account number textbox, and an initial balance textbox. I need to make error messages when the user doesnt enter their info, but can't figure out the if statements that i need to use. What would you suggest? Thanks

Answer 1

//Place this code under button click function.

if (!System.Text.RegularExpressions.Regex.IsMatch(txtFirstName.Text, "[^A-Z|^a-z|^ |^\t]"))
{
if (!System.Text.RegularExpressions.Regex.IsMatch(txtLastName.Text, "[^A-Z|^a-z|^ |^\t]"))
{
if (!System.Text.RegularExpressions.Regex.IsMatch(txtAccNo.Text, "[^0-9|^ |^\t]"))
{
if (!System.Text.RegularExpressions.Regex.IsMatch(txtBalance.Text, "[^0-9|^ |^\t]"))
{
MessageBox.Show("Validation Success");
}
else
{
MessageBox.Show("Invalid balance");
}
}
else
{
MessageBox.Show("Invalid account number");
}
}
else
{
MessageBox.Show("Invalid lastname");
}
}
else
{
MessageBox.Show("Invalid firstname");
}