Solved

Clearing a combobox

Posted on 2009-06-29
9
280 Views
Last Modified: 2012-05-07
Hi, I'm using VB2005, WinForms. I have a DataGridView and a set of Controls (i.e. Textboxes, ComboBoxes, etc) on one of my Forms. For the ComboBoxes, I load the data from the DataGridView in the following manner, which works fine - no problem there.

cbxDepartment.SelectedItem = dgvUserList.Rows(intRowIndex).Cells("DepartmentName").Value.ToString

However, once a value has been loaded into the "Text" property of the ComboBox, I cannot clear it to a "blank" value. I can replace it by reloading a new value, but I cannot do the following (it has no effect).

cbxDepartment.Text = String.Empty       ' Not working
cbxDepartment.Text = ""            ' Not working either

Is there a way to clear the Text value once the ComboBox has a Text value visible?

Thanks,
Fulano
0
Comment
Question by:Mr_Fulano
9 Comments
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 24741238
have you tried: cbxDepartment.SelectedItem = -1
0
 
LVL 2

Assisted Solution

by:Xygxag
Xygxag earned 200 total points
ID: 24741242
Try cbxDepartment.SelectedIndex = -1
0
 
LVL 55

Accepted Solution

by:
Jaime Olivares earned 300 total points
ID: 24741287
Correct way is:
cbxDepartment.SelectedItem = Nothing
or
cbxDepartment.SelectedIndex = -1

0
Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

 

Author Closing Comment

by:Mr_Fulano
ID: 31598161
Both solutions worked. One contributor provided more than one option, which I took into consideration while splitting the points. -- Thank you both for the great help!
0
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 24744065
I don't understand why I haven't got any points here since I was the first to propose this solution! Really strange!
0
 
LVL 55

Expert Comment

by:Jaime Olivares
ID: 24744299
eric,

Maybe you didn't notice but your proposal:
cbxDepartment.SelectedItem = -1
should be:
cbxDepartment.SelectedItndex = -1

MSDN documentation states:
SelectedItem:
The object that is the currently selected item or nullNothingnullptra null reference (Nothing in Visual Basic) if there is no currently selected item.
SelectedIndex:
A zero-based index of the currently selected item. A value of negative one (-1) is returned if no item is selected.

So, your proposal should work unless by any chance one of the values in combo is -1. But it is against MSDN documentation.



0
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 24744501
how come Xygxag who posted the same I did after me got points?
0
 
LVL 55

Expert Comment

by:Jaime Olivares
ID: 24745582
it is not the same solution:

emoreau:
 cbxDepartment.SelectedItem = -1
Xygxag:
 cbxDepartment.SelectedIndex = -1
0
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 24745890
my mistake. sorry
0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: jpaulino
XML Literals are a great way to handle XML files and the community doesn’t use it as much as it should.  An XML Literal is like a String (http://msdn.microsoft.com/en-us/library/system.string.aspx) Literal, only instead of starting and ending with w…
If you need to start windows update installation remotely or as a scheduled task you will find this very helpful.
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

808 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question