One Combo Box Fills Another And Hits The Second Combo Box's Lost Focus Event?

Jun 7, 2012

Combo box 2 is filled based on a selection made in combo box 1 and a listview is populated based on the selection made in combo box 2.When the LostFocus event completes in combo box 1, it hits the LostFocus event in Combo Box 2 but it shouldn't. How do I prevent this from happening or if I can't prevent it, how do I work around it? The following is the code used.

Private Sub cboCategory_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles cboCategory.LostFocus

[code].....

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Expand Combo Box On Focus Event?

Dec 17, 2009

I want to automatically expand Combo box on focus event. I have set the Droppeddown = True in gotfocus event, but this has a side effect. When click event gets fired, it expands dropdown and closes immediately. How can I avoid it?

Here is Code:

Private Sub cmbElectLoadPS_gotfocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmbElectLoadPS.GotFocus
cmbElectLoadPS.DroppedDown = True
End Sub

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Lost Focus Event, What Control Is Getting Focus?

Mar 21, 2012

I have a textbox on a form that when it loses focus it updates other text boxes on the form. But before it updates the other textboxes I check the input value in the textbox lostfocus event if it is undesired I return focus to the the textbox and alert the the user with a msgbox. However where my problem is, is that when the cancel button is clicked I don't care what the input in the textbox is because the changes are being canceled but if the value is undesired the it keeps returning focus to the textbox instead of canceling the changes. Is there a way to see what control was clicked on before or in the lost focus event? Can't seem to figure it out tried enter and leave events but no luck!

So for example something like this...

Code:
Private Sub TextBox1_LostFocus(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.LostFocus
If Control that was clicked <> btnCancel then

[Code].....

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LEAVE Event And LOST FOCUS Event When Entering Data

Feb 9, 2011

I have a Visual Basic Program that, when I enter data into a textbox, uses LEAVE events to update it. However, it will not update until I go to another textbox or press a button or other similar control.This also happens when using the LOST FOCUS event.How can I make the textbox update (be it doing a financial recalculation or some other custom function) happen when the user clicks/tabs out of the textbox and NOT having to click on a button or into another textbox?Do you recommend having a separate button for performing the custom functions?

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Create A Fading Form On Focus Lost &got Event?

Jan 3, 2012

I am doing project in vb.net.When i click on button open I opened form with no control box(minimize,maximize etc).set borderStyle to FixedToolWindow.I want to change the opacity of form on got focus & lost focus event..I also used activated & deactivated event but doesnt working[code]...

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Detect Button Click Before Lost Focus Event?

Jan 30, 2010

My application has a form which contains several Textboxes where user is required to fill up data. Once data is filled up user can click on "Save" button to save the data. I have added lost focus events to all textboxes so as to validate user input. When I click on cancel button, i want to detect cancel button click, but textbox lost focus is fired first so I get error message for textbox before my code moves to cancel button click handler. Is there any way to detect button click before lost focus event?

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Pick A Word In Combo Box A That Has Specific Words/phrases In Combo Box B Show?

Feb 24, 2009

i wanted to link options selected from Comb box A (general) to specific options in combo box B (specific). I want to pick a word in Combo box A that has specific words/phrases in Combo Box B show. But not all the words to show in the combo box B if they aren't associated with the Word picked in Combo Box A. Ex.When "Soda" is picked in A, only "Coke, Sprite, Fanta" should be visible in combo box b, not everything else.This is the code i used to make the boxes, but i don't know how to link them.

Private Sub MainForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
' fills the combo boxes with values
Me.xGeneralComboBox.Items.Add("Soda")
Me.xGeneralComboBox.Items.Add("Juice")

[code]....

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Use A Databound Combo Box To Display One Field In The Drop Down And Another As The Combo Box Text On Roll Up?

Feb 21, 2012

How to use a databound combo box to display one field in the drop down, and another as the combo box text on roll up? Using VS 2005... For example, I have a datatable that has 2 fields. One called "ShortDesc" and one called "LongDesc". I want to be able to see the "LongDesc" column values in the drop down on the combo box. When I make a selection, I want the text in the combo box to read the corresponding "ShortDesc" value.

[Code]...

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Object Null Combo - Error When Try To Populate Some Combo Boxes With A Value

Nov 16, 2011

I am getting an error when i try to populate some combo boxes with a value, the combo box has values in and the right amount the code is getting the right number.

the error msg is "Object reference not set to an instance of an object."

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Javascript - Change Values In Combo Box By Selection In First Combo Box?

Jan 12, 2012

I've got some code like the following. I want it so that when I chose an item in 'select 1' it changes the in the second combo box but I'm not sure of the best way to go about it. Does it have to be AJax or can it be done with just Javascript?

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>

[code].....

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Datagridview Combo Box - Set A Single Cell As A Combo Box?

Feb 13, 2009

is there a way to set a single cell as a combo box? it looks to me that you can only set the whole column.

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Forms :: Selected Item In Combo Box Will Not Appear In Another Combo Box?

May 27, 2011

how do i program by saying if a certain item is selected in a combo box then that item will not appear in a second combo box. i have this code for now but it does not work

[Code]...

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Programmatically Add Combo Box Items To A Combo Box In A Datagrid?

Mar 11, 2010

I know how to add the items during design time but how do you add the items through code. I want to fill the combo box in the datagrid with the results of an SQL query?

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Enable/Disable Combo Box From Another Combo Box?

Feb 7, 2011

I have a form with 8 combo boxes and would like to disble certain combo boxes, depending on what was selected in another combo box. The reason is so the user will not have a blank return on a query. The first form I created like this worked great, no issues. This form only allows one combo box (Number_of_Lightheads) to disable any others. Below is the code I have for this Form. why the other combo boxes will not disable the ones that are called out in the code?

Option Compare Database
Private Sub High_Def_AfterUpdate()
If Me.High_Def = Yes Then

[Code]....

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Selected Item In Combo Box Will Not Appear In Another Combo Box?

May 27, 2011

how do i program by saying if a certain item is selected in a combo box then that item will not appear in a second combo box i have this code for now but it does not work

j = 0
Do While j < cmbSession.Items.Count
If (j <> lesson) Then

[code].....

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Forms :: Changing The Backcolor Of A Control When It Has Focus And Lost Focus?

Feb 16, 2011

Is there a more efficient/easier way changing the backcolor of a control when it has focus and lost focus? Let's say I've got 10 text boxes. Right now I would have 20 different events...10 for Enter event and 10 for Leave event. Of course, entering would change the back color to "green" and leaving would change it back to "white".

[Code]....

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Combo Box Selected Index Changed Event?

Jul 1, 2009

Here is my code for programming a program that reads from a file called RESORT.TXT

Containing the text:
Barb Allen
604 777 1234

[code].....

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Forms :: Event Procedure From Combo Box Drop-Down?

Jul 24, 2011

I've created a form to handle "frequently asked questions". In the form I have five Drop-Down Combo Boxes and I want the user to be able to select one of the questions listed in the drop down boxes and have it return a "message box" with the answer to the question. Naturally I'll have different "answers" for each question, but my initial efforts have me getting my message box as soon as I click on the drop-down arrow itself, and I don't want that triggered until I click on the specific question.

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Combo Box Event To Select Certain Data From An Access Database?

Nov 30, 2010

I am using VB 2008 Express to connect to an Access 2007 database. I have a combo box that is populated by the database. When I used the Access report VBA, I used the AfterUpdate() event to calculate a sum and place the results in a text box. I need to know how to do the same operation in VB 2008 Express using the SelectedIndexChanged event of the combo box.

The combo box is called "cboYearMonth" and is populated by my database, this is working correctly.

The text box that I want the calculated results to appear in is called "ExactPagesTextbox"

I have a query in Access called "JobTypeExact_Query" that contains all the pages that I need. What I need to do is calculate the total number of "Pages" limited to the YEARMONTH selected in the combo box. YEARMONTH is a value in every record in this query.

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Combo Box - Disable SelectedIndex Changed Event During Form Load

Apr 26, 2010

I have a combo box on a form. I have a SelectedIndexChanged event, that displays a message box when the combo box has another item from it selected. This works fine. However when the form is loaded, I initially want to set the current drop down box item from the database, then AFTER I have set the current value, I want this event to work. Problem is from the get go when the form loads it asks me the question as its being changed from 'no data' to then be populated with a bunch of data and an item selected.

[Code]...

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Combo Box On A Tab Control SelectedIndexChanged Event Doesn't Fire Until Tab Is Selected?

Jan 24, 2012

I am using VS2008, vb.net, Windows forms project.I have a combo box control on a tab control.The selected value of the combo box is bound to a binding source.The data source of the binding source is a typed dataset.I set the datasource of the binding source when a record is chosen in a data grid control.Since the combo box is bound to the binding source, this should set the selected value of the combo box, and fire the initial SelectedIndexChanged event.Therefore, I remove the SelectedIndexChanged event handler for the combo box before I set the datasource of the binding source, and add the handler again after the datasource is set.

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Fire SelectedIndexChanged Event Programatically In Combo Box Of WebBrowser Control

Jun 20, 2009

I am using visual studio 2005. i am using webBrowser control to automate third party website.My problem is SelectedIndexChanged event is not getting fired. I used the code.[code]This code is changing the value in combo box but it is not firing the selectedindexchanged event. If i manualy select the item then after selecting a item it shows different message. How should i do it programatically.

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Triggering Event Handlers When The User Makes An Input Into A Combo Box?

Dec 9, 2011

This is a spin-off post from another issue I am working on. The problem is related to triggering event handlers when the user makes an input into a combo box, you might even call this a complaint.I have a combobox with a DataSource and ValueMember and DisplayMember. There is no DataBindings to worry about at this point. The combobox is DropDownStyle = DropDown and I havealso enabled AutoCompleteSource = ListSource and AutoCompleteMode = SuggestAppend.The datasource contains a list of Countires, and when the user types in an entry or chooses an entry from the combobox, I should be able to detect what the user has selected ortyped immediatley after the selection, some would say it's the very purpose of the combo box.Which event would you choose to deterine what the user has entered or Selected? few events come to mind:

SelectedValueChanged
SelectedIndexChanged
Validating

[code].....

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Lost Focus In Program

Nov 25, 2011

I have a form with 7 textboxes, all describing different attributes of a used car. In the shared leave event of my tb's, I need to code a case statement which determines the particular textbox that lost focus. I then need to perform different tasks which I understand how to do, and I don't think they matter to my question.

I understand how to give focus (txtTextBox.focus()), but how do you tell if something has lost focus?

And furthermore, how would you use that to structure the case statement?

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Arrow Keys In MDI Focus Is Lost

Nov 28, 2009

I had previously made a simple Pong program which use keyboard to control. The control includes "s" to start the game, "p" to pause, "r" to resume and left, right to move the paddle specifically. This program work with little problem. The first problem I encounter is if I insert even one single button on the form to display instruction, the arrow keys will no longer work. But I get around it by using Menu Strip instead.

Then, I am required to put this program, among others into a MDI program. And this is where the problem happen. If I have this Pong game loaded, and I press "s", "p", or "r" keys, it have no problem, but if I press the "left" or "right" keys, it will not move. I am speculating that maybe the focus is lost when arrow keys is pressed or something similar, but I have absolutely no idea what is happening. I have tried giving focus back to the form if focus is lost, but to no avails. And this is the code for the movement of the paddle. This reside on a form, the movement itself is passed to another class. The MDI parent is on another form. [Code]

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Know My Application Lost Focus In Program?

May 10, 2012

I am using VB.NET to build my application. And in my application has a lot of Forms. It doesn't use MDI Parent Form, but I use another simple Window Form (I named it frmMain) that I suppose it is my MDI Parent Form. When frmMain load, windowState = Maximized. And when I open a Form (example: I named it frmCustomer) that I suppose it is my child Form, and I set its properties (frmCustomer.TopMost=True) when it load, so it always on the top. But When I change to open another application such as Ms. Word or Mozilla Firefox... the frmCustomer is still on the top. how can I know my frmMain lost focus?

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Lost Focus Method For Textbox?

Oct 5, 2010

How to write Lost focus method for asp.net text method? Please anybody have any idea to write this, share with me?

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Lost Focus On Combobox In Datagridview

Jun 17, 2010

I have a datagridview with a combobox column. The combobox column is populated from a collection. I begin to add data to the dgv, I select in the first row a value in the combobox and go to the second row. In the second row, when the combobox gets the focus, it appears 'V18', also the selected value before. Why? An on the other, when the combobox in the second row losts the focus, the combobox value is nothing. Why? Here are two images:

[Code]...

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ShowDialog Causes Flashy And Lost Focus?

Jun 29, 2011

A MDI form which is used to call a child form (frmCust), there is a customer datagridview in the child form whereby user can double click on any customer row to call out the frmCustDetail form to display all customer details.I have got what i want but I encountered two problems shown as below.2) Lose focus - Sometimes when i close the frmCustDetail and get back to the child form. the whole

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Forms :: VB App Terminates Before It Hits The Load Event

Mar 1, 2010

I have a simple vb.net app written using MS Visual Studio 2008 with SP1 and .NET framework version 3.5. This app simply queries a MySQL table into a dataset, makes a csv file from that data and then uses Oracle SQL*LDR to load a local Oracle table. Nice and simple.

This app runs fine on just about any computer or workstation I have tested it on with no issues but when I move it to the workstation it will live on...it shuts down just before it hits the load event. I have tried to capture any errors but so far there do not seem to be any errors generated at any point...it simply terminates with no explanation.

I even went so far as to recreate the project from scratch and still got the same result. this phenomenon only seems to occur on the very pc I am expected to deploy to.

the only thing I know for sure is that it is getting at least as far as the declaration section of the form. Once it has dimmed all objects/variables/etc..it seems to just shut down.

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