Coding help

[MrJokster]

This is probably a basic question but I am very new to C# so bare with me. I am trying to make it so when a text box (labeled LastNameTextBox) is not filled in and a user clicks the Print button a message will pop up that says "Please enter a last name." I also have to do this with a first and last name and have already gotten this to work with a phone number in a Mased Text Box. This is my code thus far in this section:


string s = String.Empty;
Boolean pn = PhoneNumberMaskedTextBox.MaskFull;
Boolean ln = LastNameTextBox.
Boolean fn = FirstNameTextBox.

if (pn == false)
{
s = s + "Please enter a phone number.";
MessageBox.Show(s, "FUN Error Message", MessageBoxButtons.OK);
}

if (ln == false)
{
s = s + "Please enter a last name.";
MessageBox.Show(s, "FUN Error Message", MessageBoxButtons.OK);
}

if ((ln == false) && (fn == false))
{
s = s + "Please enter a full name.";
MessageBox.Show(s, "FUN Error Message", MessageBoxButtons.OK);
}


My problem is that I can't seem to figure out what comes after the period in LastNameTextBox. (same issue with FirstNameTextBox.) What do I need to put after those periods?

[ThermoSight]

I dunno ... maybe sumthin' like

bool ln = !string.IsNullOrEmpty(LastNameTextBox.Text);


Actually, there's a wealth of information available to you via the VS Help section. Just click on the Help/view Help and enter what you're lookin' for, such as, say, Textbox class ....

http://msdn.microsoft.com/en-us/libr...s.textbox.aspx

or "String class", yielding

http://msdn.microsoft.com/en-us/libr...em.string.aspx



It's all at your fingertips, bro'


Old Fool

[Arjay]

Look into control validation.

http://www.codeproject.com/KB/miscct...ngtextbox.aspx