WInforms Combobox SelectionChangeCommitted Event Doesn't Always Change SelectedValue?
Sep 29, 2011WInforms Combobox SelectionChangeCommitted event doesn't always change SelectedValue
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.net - WInforms Combobox SelectionChangeCommitted Event Doesn't Always Change SelectedValue
Mar 23, 2012I 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?
ComboBox Event After SelectedValue Changes?
May 3, 2010I'm using VB 2008. I'm looking for a way to take the value of the combobox after the user selects the right one. The combobox is databound and in List mode allowing selection of only the items in the box. I allow autocomplete by setting:
AutoCompleteMode = SuggestAppend
AutoCompleteSource=ListItems
So the user can key in the right value and the value narrows down each time. The user can press enter or just click somewhere else to select the value. I need a way to display the value of the combo after the selection is made but not each time a user presses an additional key to narrow down the selection.
Combobox Query - SelectedIndexChanged And SelectionChangeCommitted Related?
Oct 7, 2009I'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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Aug 12, 2010I 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?
Winforms - .net, Combobox.datasource Will Change Selected Index?
Mar 1, 2012Let me try to describe my problems in the simplest way: I have combobox1 and combobox2. I hope to achieve two things: Combox1 is bound to list1 (a list of string). When a user selects an item in list1, list2 (a list of string) will be obtained from database and combobox is bound to list2.If user specifies text1 in combobox1 and text2 in combobox2, then these two values will be shown in the comboboxes regardless of the bound lists.
[Code]...
So the results of above code is that goal 1 is achieved, but goal 2 is never achieved. combobox1.selected index is always 0 and combobox2.selected index is always 0 too.
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Jan 25, 2010I have an ASP.Net form where I use a DropDownList control to display data retrieved from a table. However setting the SelectedValue of the DropDownList to a value not existing in the dropdown list does not trigger an exception.
[Code]....
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Jul 20, 2009What is the meaning of 'selected value' in combobox properties?
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[code]...
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Jul 31, 2009I would like to assign cboBegCust.SelectedValue to c and cboEndCust.SelectedValue to d
Dim c, d As String
cboBegCust.SelectedValue = "customer"
cboEndCust.SelectedValue = "customer"
[Code]....
Bound ComboBox SelectedValue Does Not Display?
Jan 5, 2012I bind a datatable to the combobox.DataSource on load. I then give the combobox aisplayMember and a ValueMember (2 different columns out of the datatable). In the SelectedIndexChanged of the combobox I would like to use the SelectedValue property of the combobox, just to test I MsgBox(combobox.SelectedValue) and I get "Argument 'Prompt' cannot be converted to type 'String'." Why isn't it displaying the value?
OnLoad
cbCISoftware.DataSource = dbMaps.Tables("maps")
cbCISoftware.ValueMember = "id"
[code].....
ComboBox DataSource AND SelectedValue DataBind?
Apr 19, 2011Is it possible to BOTH set a comboboxes datasource AND databind the selected value?Ihave 2 comboboxes on a form that I want to populate with data from 1 table,ut I want the actual selected values on each of the comboboxes to come from separate columns n another datasource Right now if one combobox changes, so does the other if that makes sense.
Here's a sample of code:
'Bind DataSource
With cboYields
[code].....
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Jun 2, 2009I have a question for a combobox in Visual Studio 2008 (VB)If illed a combobox from a table and the use the following statement: Me.cmbProduct.SelectedValue = 1 (or another number)The problem is now that in the form the value is selected but with a blue color. I have on my form several comboboxes but i don't want that blue color.
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Sep 27, 2010I've got a ComboBox with an ItemsSource which I've bound to a List(Of String).What I'd like to do is have the XAML update a String property when the SelectedValue of the ComboBox changes. I've seen a whole bunch of examples for TextBoxes which use
Text="{Binding Path=MyString}"sort of stuff, but I don't really think that'll be the way to go if, in future, I need to change the ItemsSource to a List(Of ObscureObject)...
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Mar 16, 2010I have a ProbationComboBox with the SelectedValue bound to a RegistrationBindingSource, and the DisplayMember bound to a ProbationBindingSource. [code]
View 2 RepliesCreate A Query With Where Statement, Combobox.selectedvalue.tostring()?
May 5, 2010I am tring to bind a data to listbox with where combobox.selectedvalue. My code is below; I am using data entity in wpf project;
Class Window1
Dim db As New AdvanceEntities
Private Sub Window1_Loaded(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles MyBase.Loaded[code].....
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SQL Server SELECT Stored Procedure According To Combobox.selectedvalue?
Apr 12, 2010In order to fill a datagridview according to the selectedvalue of a combobox I've tried creating a stored procedure. However, as I'm not 100% sure what I'm doing, depending on the WHERE statement at the end of my stored procedure, it either returns everything within the table or nothing at all.This is what's in my class:
Public Function GetAankoopDetails(ByRef DisplayMember As String, ByRef ValueMember As String) As DataTable
DisplayMember = "AankoopDetailsID"
ValueMember = "AankoopDetailsID"[code]....
guess it's down to the WHERE part of the stored procedure, but I need a way to pass the selectedvalue of the combobox into the @AankoopID parameter.
[2008] Display Text Item In Combobox By Selectedvalue Function?
Feb 4, 2009i want to set the current displayed item in combobox by combobox.selectedvalue = valuehere is the code
Combobox.selectedvalue = value
rivate Function populateComboSupplier(ByVal supplierID As Integer) As Boolean
Dim readSupp As New SupplierCRUD
[code].....
Get The ComboBox SelectedIndex Based On SelectedValue When Datasource Property Is Set With DisplayMember And ValueMember?
Jun 11, 2009Is there any way to get the ComboBox SelectedIndex based on SelectedValue when Datasource property is set with DisplayMember and ValueMember?
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Mar 3, 2011On my DataGridView one of the columns is set to a ComboBox. When I make a selection from this ComboBox the CellValue change Event is not triggered. What event is triggered when I do the selection?
View 1 RepliesRaise EditingcontrolShowing Event When We Try To Change The Value Of A Combobox Cell In Datagridview
Jul 21, 2011is it possible to raise EditingcontrolShowing event when we try to change the value of a combobox cell in datagridview
[Code]...
Tooltip On Windows 7 Doesn't Work VB2010 - Thecolor Doesn't Change ?
Jun 12, 2011I am trying to change the background color of a tooltip
I am using tooltip.backgroundcolor = color.colr
No errors but thecolor doesn't change
Why Doesn't My WinForms WebBrowser Program Work
Feb 7, 2010[code]I have web programming background and trying to learn windows programming....any guide or tutorial to make the transition smoother ?
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Nov 29, 2011I have below code in my Form Load event handler but the ListView doesn't show any column headers. I want the column headers to be displayed.
[code]...
VS 2010 Change The Labeledit To True But That Doesn't Change The Selected Node?
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Along with renaming I have it set to that a user can add a node. So once the node has ben added how do I let them rename it as it is being added and without being a prompt or inputbox? So lets say I cam clicked on a parent and they click add node, it adds it to parent but I have it so it is default "New" but I want them to edit it as it is added. I think it will be along the same lines as clicking on one and rename but I have to start some place.
Industrial App: Raise An Event For Something That Doesn't Have An Event?
Sep 15, 2010I want to raise an event for an opto-input state change but not sure if I can. Basically I have 4 opto-inputs on a PCI control card - one of which changes pretty rapidly - that I currently poll with a timer. I'm looking at getting a proper hardware counter for that but the other 3 are production status indicators. I'd prefer it if they alerted the app to a state change though.
Depending on the state of one of the inputs I have to fire a relay which simulates a button push. Having been playing with serial ports and getting a very useful app built for logging production data into a SQL Server DB I want to re-visit a proof-of-concept system I built a few months ago.
Current code - which works fine - but I'd like to change is like this:
Private Sub tmrOptoInput_0_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles tmrOptoInput_0.Tick
'Read OptoInput_1 to Monitor Track State...
Dim aType As Byte ' replace Byte with any other type
[code].....
Having 4 inputs so I need 4 timers, plus another one that polls the database and checks a status flag which triggers the app to start logging. I'd like it to be event driven rather than timer driven if at all possible but I don't know how and there's nothing in the control card docs. Also I can't seem to find anything relevant on the web.
Forms :: Change A Property On Form - Doesn't Show That Change
Jan 13, 2010I'm working on a simple base form in which all the other forms in the project will inherit. This base form only adds 5 properties (at the moment) dealing with painting a gradient background. The problem I'm facing right now is when I change a property on Form1 (the test form) and click run it doesn't show that change. I also checked the .designer.vb file and when I make a change it's not added to the code behind file, I'm at a loss right now to why.
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SelectedValueChanged And SelectionChangeCommitted
Oct 11, 2010I'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.
View 9 RepliesDynamicaly Refresh Databound Combobox Items Based On Selected_index_changed Event Of Another Combobox?
Jan 27, 2010I am using VB.NET together with ADO.NET to create a program. I have set my TableAdapters as needed and bound the correct tables-columns to my comboboxes.My problem though is this:My combobox2 item is bound to a datatable. The table adapter's Fill method (the select command basicaly) includes a public variable in the where clause to fetch the correct results. I ll put some code here to clarify it a bit more.Public Class Frm_inv
[Code]...