Area Selection by combo boxes

[mozaharul]

Hi all,

We want to select sepecif districts and sub districts as well under a selected division from the combo boxes used. And want to clear the value of district and sub district when there is a change in the division selection.

The code works but with a error message.

Please have a look and help.

regards,

[Rioven]

The SelectedIndex=-1 that triggers errors.
You may consider assigning these combobox at index 0 to be "" blank or "-none-" then you can use or initialized selectedIndex=0.

[mozaharul]

Hi,

The same code (cmbthana.selectedindex=-1) works for the sub districts(cmbthana combo box) without any error message, then wonder what is the cause for not working with the districts (cmbzilla combo box).


regards,

[klaus]

Hi,
ComboBox1.SelectedIndex=-1 does not mean clear the selected text.
You must clear the text of the selected item first.

As soon as you have filled a ComboBox and selected an item then ComboBox1.SelectedIndex=-1 gives an error.

ComboBox1.Clear does not clear the displayed text.
Because, generally, a default selection is made.

But why, after having initialized a combobox, not preselect the first item with ComboBox1.SelectedIndex=0 as the default, so the user has already one, and it avoids also your problem in a different way.

I have joined a modified code that solves your problem, and shows better the solution than the text.

For comparison, to show another way, I have replaced the
If Then
Else If
End If etc

by
Select
Case 0
Case 1
.
.
End Select

Best regards

[mozaharul]

Hi klaus,

Regards and thanks.

Your help is appreciated.