Checking a ComboBox

Salte · November 25th, 2004, 07:44 AM

I have a ComboBox on a Form in an application. In this ComboBox i want the users to either choose one of the items in the list or enter a new item. When the user is finished filling out all required fields, i need to check:
1) If some new text has been written in the ComboBox
2) If the user has selected a new item after writing in the ComboBox
3) If the text written is the same as one of the other items in the list.
I am struggeling to work out wich controls to use for this purpose, any help will be greatly appreciated.

Salte · November 25th, 2004, 08:37 AM

Ok, i've encountered some new problems :)

When the form is shown, the following line of code is executed:

Code:

cbx_type.DataSource = prog.HentTyper();

cbx_type is the ComboBox in question, and the "prog.HentTyper()" method returns an array of strings. This works fine, but now there doesnt seem to be an editable field in the ComboBox. It is possible to erase one of the existing choices and enter new text but whenever someone enters any text (and selects this text when submitting) the following if-test will execute:

Code:

if(cbx_type.SelectedText.Length < 1)

This tells me that there is something wrong somewhere :) Anybody care to explain?

Kep · November 30th, 2004, 05:49 PM

You could try...

Code:

if(cbx_type.Text.Length < 1)

The help isn't entirely clear about the difference between SelectedText and Text, but I thought the text of a ComboBox was returned by Text.

What is the DropDownStyle of your ComboBox?

Kep.