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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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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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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Feb 8, 2011
i have a login form that contains a combo box and a text box and a button. the items of the como box are from the databse while the person selected can only log into the system if the password he enters on the textbox matches the password details in the database.(of the name selected)
my problem is, the second tab contains a couple of textboxes and combo boxes that need to be filled in. but i want the first combo box in the second tab to have drop down value of the name of the person that has logged in to fill in the form.
the person login in the first tab, his name should appera on the combo box in the second tab
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Nov 29, 2005
I have a problem with Combo Boxes. When one uses the mouse to open the drop down menu, the text appears to be missing, but when you click on a entry, the text appears in the box at the top of the combo box (the thumb?). Likewise, when the cursor keys are used to scroll through the options, the text appears in the thumb.
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Jul 20, 2011
Recently started working with VB.NET, and I'm just playing around with the controls and everything. What I want to do, is populate a drop-down list or a combobox (on program load) with data from a dictionary. I'm used to php, so I tried a for each dictionary.items as newitem combobox.items.add(newitem) but I can't get it working. Can someone give me an example of this? And what if i wanted only the key to show in the drop-down, and the corresponding value shown on a label besides it when I make a selection?
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Jun 12, 2011
How to turn the combo box/drop down box uneditable.
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Jan 29, 2010
I have in my code the CBN_DROPDOWN command that is sent using a Windows Message, but I want to be able to make the Combo Box List Drop Up as well. Does anyone know if this is possible or how I can do it?
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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
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May 22, 2009
I have a modal form with a single instance of the built-in .NET 2.0 tab control. The tab control has several pages, and on one of them is a combo box that isn't populated until the user activates it for the first time. When that happens, I handle the DropDown event and run a process that takes several seconds, then I add the items returned by that process to the combo box.It works fine, except right after the list portion of the combo box is dropped down, it immediately closes as if some other control took the focus. I've narrowed it down to the fact that there is a tab control on the form, and the process that retrieves items for the combo box takes more than 4 seconds. If I create a completely blank form with just the combo box, I don't see this behavior.
Needless to say, this is strange beyond belief. Any idea why the tab control would interfere with the control that currently has focus?
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Oct 5, 2011
I want a to create a combo box that gets the selectable items from a table and when I save the form I want the selected item saved to a different table. I'm sure this is simple I'm not a database wiz and still very much a newbie.
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May 17, 2012
I have a problem trying to link my my datagrid view to my sql server stored procedure. The way it should work is that when I select an item in a list from my combo box it returns a set of rows on the datagrid view specific only to that item This is the code on the server sideCREATE PROCEDURE spCompanySearch
[Code]...
The @comp is supposed to be each item in the combobox list but I don't know how to do it or how to go about it
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Feb 23, 2011
I have read through some of the other posts and I think what I want to do is slightly different. I have a combo box in VB ExpEd2010 that I want to allow the user to only select from the drop down list. However, I want to be able to set the value in the combo box to something that is not in the list. So the drop down list will have values 1, 2, 3 but I want to be able to write to the same combo box a value of 2.4, 1.2, etc.
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Feb 24, 2012
I've found some unexpected behaviour in my ComboBox, which I'm hoping someone can help me with. If focus is lost by pressing the Return key on a form which has AcceptButton set, then after handling the Validating event and cancelling the validation,the ComboBox will not drop down any more. When you click on the drop-down arrow, the list drops down momentarilly then goes away again To reproduce this, create a new VB.NET Windows Forms application. Drop a Combo Box and a Button onto the default form, then add the following code:[code]....
Run this application, click on the Combo Box, enter some random text (e.g. "asdf"), then press Return. After this, click on the drop-down arrow on the Combo Box.I'm using Visual Basic 2010 Express on Windows 7 Home Premium.
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Jul 16, 2009
See the below
Imports System.Data
Imports System.Data.OleDb
Public Class Form1
[Code]....
the last value inserted into the access database will be add to the drop down list of their corressponding combo box.
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Feb 11, 2009
Ive been working on this project of mine for some time now... though im not involved in IT in my current company, im just trying to help to at least have their system computerized (they are still doing it manually by paper & calculator)... I have one problem though which made me stick for 2 days (and still counting) without progress...How To Drag & Drop Between 2 Datagrids Between 2 similar MDI Child Forms
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Jan 11, 2010
I want to call the "CheckedChanged" event for a Radio Button from within another sub procedure elsewhere in the program. The posts that seem to relate have me confused.
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Mar 5, 2012
Using the visual part of VB I can create 'event' procedures. eg. if I double click on a button on the form it will take me to the code window and insert a procedure as follows:
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Apr 14, 2012
I am trying to reference the KeyDown event from a independent sub procedure and have it loop back into original independent sub procedure. Starts off in Independent sub procedure (DisplayAction - which then calls KeyDown Event) Goes into KeyDown event (KeyDown then calls DisplayAction) Goes back into original sub procedure (DisplayAction) and the loop continues. * Steps 1 and 2 work just fine in my code. Step 3 is the problem. My program does not loop back into the independent sub procedure.
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Apr 27, 2010
I can create event prodcedures for form objects, but is there a way to create an event that triggers when a certain variable equals a certain value?
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Jun 4, 2009
I read some articles about using events and/or class events, but not a single article realy explainend the true use and benefit of using events in classes, but only how to use them.
As far as I understand, you can use an event to trigger a certain procedure of a class within another class or aspx page, but you can do the same by declaring an object of that class and call de procedure or methods directly. why and when or where we would use an event with addhandler to call a routine from a class and not declare an object of the class and call the desired routine directly.
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Jun 3, 2011
I'm developing this procedure using a timer object. The thing is the procedure is not in the timer's event procedure but I want it to depend on the timer's interval when executing, it's just not calling the timer procedure. How can u declare objects and use their event procedures in code.
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Nov 3, 2009
how would I create an event procedure for something not yet on a form?
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Oct 27, 2009
This is a concept question about vidual basic asp coding -- I'm using certain examples, but the question is not about those examples specifically.
Let's say I have some code in button1_click vb code-behind.
In order to perform my desired function, I need access to StatusEventArguments in an event, for example, SqlDatasource_selected.
Is there a way to access that data from my procedure, or do I have to access it only in the event codebehind and store it in a global or session variable so I can access it in my button1_click procedure?
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May 20, 2011
I try to run a custom sub procedure from the form load event. It keeps crashing. I believe it is because all of the controls are not loaded and the sub procedure makes use of some controls. How can I make sure everything is loaded before the sub procedure is run?
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Jan 26, 2010
the combo box style 1 has both the drop down option but also a manual entry option. I need to know how to code it so that when you manually enter data, it takes that data and places it in a text message "The shipping charges for "data" is $15" displaying in a text box. Shouldn't be hard but have developed a mind block.
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Apr 2, 2009
I am developing a web sit using web parts in asp.net and c#. I have one problem, when i drag the web part from one web part zone to another, the image of the web part is still there at the web part zone, utill i drop it at the destination. i want to make that image of web part invisible at drag and drop time.
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Apr 21, 2009
I have a website where the user requires to add and remove Headlines from the main page.
The headlines are stored in a database with a column titled 'Display' (true or false) which decides if the headlines appear. I want the user to have the ability to add or remove headlines from the main page, so have created another page which creates a table of all headlines along with a drop down list containing 'Enable' and 'disable'. I want these drop down lists to work by when the user changes the value in the drop down list the database will be updated. Only I cant find how to give the drop down lists an on change event.
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Mar 22, 2011
i created a function procedure and i need to the action to be carried out when i click a button, but a don't know how to call the function procedure under the click event of the button control.
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Mar 18, 2012
i need to pass on some variables from FORM1 in to a procedure in form load event of FORM2 to say in another way i need to run a procedure (which uses variables of FORM1) which is derived in FORM1 class and in FORM2 load event
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