Checking for Input into a Field

[Gnome1984]

What is the method call for checking to see if data was entered into a field? I am wanting a site to display an error message if no data was entered.

[weirddemon]

What is the method call for checking to see if data was entered into a field? I am wanting a site to display an error message if no data was entered.

What?

What field? What data? It's like you started half the question in your head and finished the other half here.

We need details.

[jmcilhinney]

As suggested, we need more info. You say "site". Are you talking about a web site? Is your project web application/site or are you talking about a web page loaded into a WebBrowser control in a WinForms app? Remember that we know nothing about what you're doing other than what you tell us so you need to tell us everything that's relevant, e.g. "this is what I'm trying to do, this is how I'm trying to do it (include relevant code) and this is what the problem is (include relevant error messages)".