SelectedValueChanged And SelectionChangeCommitted
Oct 11, 2010
I've got 15 combo boxes on a panel and they all get SelectedValueChanged and SelectionChangeCommitted methods triggered when firing a datagrid box cellDoubleClick routine I wrote. I've stepped through every line of code and cannot figure out what is triggering the 15 events, some of which fire 2 times in a row. The first firing clears out the text in the combo. Has anyone experienced this before. Changing from SelectedValueChanged to SelectionChangeCommitted makes no difference - they all still trigger.
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Aug 12, 2010
I have a combobox which dropdown style = dropdown. I applied autocomplete function to this combobox. User can type and then use tab key to move next control or select from list.
Question: Which method to use in order get a name value from combobox? SelectionChangeCommitted or SelectedValueChanged?
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Feb 23, 2011
I have something to confirm with you. What is the difference between SelectedValueChanged and TextChanged Event in combobox. What would I prefer to use between the two events?
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Sep 18, 2009
i tried this Private Sub ComboBox2_SelectedValueChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox2.SelectedValueChanged
[Code]...
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Aug 16, 2010
I'm trying to perform an action when the value of a drop down changes, only problem is I dynamically insert the different options after the form starts up, which triggers the SelectedValueChanged instance several times. Is there a way so I can only trigger this event when the user changes the value themselves and not while the dropdown's updating?
Another question. I have a ListView as a grid with gridlines. I have checkboxes but I only want the user to be able to check one box. I figured I'd use ItemChecked and see if there were two items checked, I would alert the user and uncheck both boxes. But I'm not sure how to do this, the event is triggered whether I check or uncheck a box, and as the drop down menu it is populated after the form loads, which means the event is raised whenever I add items to the list regardless of whether the user has selected them or not.
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Oct 7, 2009
I'm designing a login screen which MUST allow the user to ONLY select a login via a combobox. A user has THREE login attempts only, the problem Im experiencing is resetting the count if they hilight the combobox, move the selection around but ultimately click on the original name.I can use either SelectedIndexChanged or SelectionChangeCommitted but they are both activated even if the same login is selected.So you can select a login enter the password twice and then click on the combobox move the selection around before finally clicking the original name and the login count is reset to 0.Is their a way to do this without using variables to store the previous value (perhaps using validating/validation methods)?
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Jan 27, 2011
In the context of data-bound combobox whose ValueMember and DisplayMember properties are appropriately set:Is there a difference between the SelectedIndexChanged and the SelecetedValueChanged events? Are they fired simultaneously when an item is selected from the drop-down list of the combo?
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Mar 23, 2012
I have a WinForms app built with VB.Net in VS 2010, and I'm scratching my head over the following issue.I have a form with a combobox which gets bound to a datasource when the form is loaded:
With Me.cboCompany
.DataBindings.Clear()
.DataSource = Me.m_dsBidResults.Tables("Company")
.ValueMember = "company_id"
[code].....
This seems to work fine, as long as the user doesn't switch focus to some other control and then go back to the combobox. After switching focus, if the user then changes the combobox selection to the first item in the dropdown list (SelectedIndex = 0), the SelectionChangeCommitted event fires, but the SelectedValue remains set to the previously selected value. I've verified this by adding a message box in the above event handler, displaying SelectedIndex and SelectedValue side-by-side.
'add this to SelectionChangeCommitted event handler MsgBox(String.Format("Selected Index: {0}, Selected Value: {1}", cboCompany.SelectedIndex, cboCompany.SelectedValue))
This does NOT happen if the user changes SelectedIndex to anything other than 0; everything behaves as expected. I've verified that the table I'm binding to contains unique values for company_id and company_name.Do I need to use some other event to verify that the SelectedValue has actually changed?
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Sep 29, 2011
WInforms Combobox SelectionChangeCommitted event doesn't always change SelectedValue
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