I'd like to force a user to make a selection from a combobox.I've tried to test it by Combobox.SelectedText = String.empty as well as another version similar to this but a little different.When I test it, it will tell me that it is still unselected/blank even when I selected something.
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I have a combobox where the SelectedValue on the combo is bound to a property on a business object.Everything works fine, but the property that's bound to the SelectedValue on the combo only gets updated when the focus leaves the control. I understand that the property doesn't get updated until the control is validated (loses focus), but I need it to update the datasource as soon as the dropdown is closed.I know I could probably leave focus from the control on the DropDownClosed event but I'd prefer something a little less kludgy.What's the best way to immediately update my datasource when the dropdown is closed?
View 2 RepliesI have a combo box that has multiple options, when the user selects one of the options (world wide city destinations) a specific value is assigned to a variable. For example if "New York" is selected the variable "x" is assigned the number 155. What I want to do is output the destination that has been selected ie "New York" in a label called "lblOutput1", do I need to store the destination as a seperate variable to be able to produce it in this label as I cannot seem to get it to work:
At the moment I am using:
lblOutput1.Text = "bla bla bla " + cmbDestination.SelectedText + " bla bla bla " + Today()
I have a combobox on a form with the dropdownstyle set to drop down. Users can either salect a value from the list, or type in any value they wish. This all works fine. However, when one particular item in the list is selected I wish to set a different value. Unfortunately I don't appear to be able to set the combobox Text property from within any of the events that fire when the selected item is changed.
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I have a combobox linked to a table Checklist (ID, Checklistname, and several multivalued fields). I want to have my subform display data from different tables based on my combobox selection "checklistname". All the tables are imported Excel files with the same fields and field types (ie. Discrepancy, reference, reference paragraph, category). How do I get my subform to requery based on the combobox selection? Or is there another method when working with "outside tables"? Import good/bad? Make new table? I have about 20 tables, if importing but only need particular data to save/store in my main table, and I need to know which table it came from.
View 2 RepliesI have just realised that ComboBoxes don't have a Change event. I have a combobox filled with a few items, eg. Bakery, Deli, Fruit & Veg, etc. Choose one of these items, all the related items show in the dgv. However, when I blank the text in the Combobox (press Delete key whilst Combobox has the focus), what event fires so I can blank the dgv? The combobox does not contain a Blank item. Even if it does, the Blank item only fires the ComboBox1_SelectedIndexChanged when the user scrolls down to, or clicks on, the blank value.
I want to clear the dgv when the user blanks the combobox without necessarily changing the selection index.
On 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 RepliesI have a calculate function that adds twenty text boxes together a+b, etc... 20 +20, B changes value when a selection in combobx is changed, how can i make the calculate funtion work up selection change in combobox ? You would think the selection change or index change , but that doesnt work because the tetbox doesnt actually get the new value till after the combo selection is made, so you actually have to go and make the selection twice I know i can put the code in the textbox value change , but i dont want to do that for 20 text boxes and i am assuming there must be a BETTER way?
View 1 RepliesIs there a way to update source combobox to printer combobox selection?So going from printer1 to printer2 the source will update according to what that printer has to offer.
View 8 RepliesUsing a DataGridViewComboBoxColumn, the goal is to make the ComboBoxes accept user's new items and also the possibility of choosing items that are already present.I'm aware of using EditingControlShowing event of the DataGridView to change the DropDownStyle of the DataGridViewComboBoxEditingControl at run time to allow this, but I'm wondering if this can be done at a lower level.
What I'm doing now is extending DataGridViewComboBoxColumn, DataGridViewComboBoxCell and DataGridViewComboBoxEditingControl, hoping to change the EditingControl's DropDownStyle in the moment I instantiate it. So far, no luck.The debugger shows the right assignment is being executed, but nonetheless, the DropDownStyle is popping at the EditingControlShowing (using the event for debugging purposes) as DropBoxList, not DropBox, which is the intent.
Here follow the classes:
Public Class DataGridViewComboBoxColumnALT
Inherits System.Windows.Forms.DataGridViewComboBoxColumn
Public Sub New()
[code]....
How to make a combobox only list based on user's input via autocomplete?For example, if user input "A" the combobox only lists all names start letter "A".If user input "AM" the combobox only lists all names start first two letter as "AM" and so on.
View 6 RepliesI'm having a problem with combo boxes. I usually use Java and it's been awhile since I used VB but I never remember having this much difficulty.My application is using an SDF file. From Data Sources, I drag the details on one of my Tables to my Form to get all of the fields. Three of them are comboboxes. Each of the three is an INT64 and each corresponds to a primary key in a different table. I click the tasks button on a combobox and for data source I select the appropriate table that has the data to go with the combobox, for display member I select the field that I want users to see, and for value member I select the primary key. Then I run a quick test and start the app, open the form, and add a new record. When I select a value from the combobox the selection won't validate because it doesn't think it's an INT64 like it should be. It seems to be using the display member as the actual value instead because if I change display member to the primary everything works great.
View 11 RepliesI have two comboBoxes, one is CountryCombo and second is StateCombo.What I want is the that when i the clicks country combo and select a one country then the States of that the country should get populated in the State Combo.I have tried things many many many but nothing working. Below is my code of how my CountryCombo is getting filled.
query="select CountryName from CountryMaster"
if dr.hasRows()
{[code]......
Is it possible to force a combobox to run it's validation event without moving the focus out of the ComboBox?
I need the event (or an event) to trigger when an item is selected with the mouse or an entry is typed into the combo box. I tried using SelectedValueChanged and SelectedIndexChanged however, these events do not fire if the user types a value that does not exist in the list source. I know I can change the DropDownStyle to DropDownList however, I still want the users to be able to type entries in the combobox (with auto complete).
I currently have a form with two comboxes. The first cbo is being populated with a project number, which is being pulled from the first column of a spreadsheet. I now want the second cbo to read the first cbo and then find that project number on the spreadsheet; when it finds that project number, I then need it to copy data from the row the project number is on. I have converted to vb from vba. Below is the code I used in vba (which obviously does not work). I only need certain cells from the project row.
Dim proj_num, rng As Range
Dim data, i As Long, j As Long
With Sheet1
[code].....
I am having a problem with data in a combobox not being refreshed (using VB.net 2005 by the way). Right now I have a windows application with several forms. I have a Template form that contains the cboActivity combobox. This combobox is filled with data from a SQL database. I also have an Activity form. This form allows me to enter new activity information and save it to the database. If I load up the Template form, click the cboActivity combobox, the Fill event is triggered and my combobox is filled with the activity data from the database. But if I leave this form open, go to the Template, add new activity information, and save it...when I go back to the Activity form the combobox has not been update to contain the newly added data. Is there a way I can force the Fill event to fire every time I click the combobox?
View 3 RepliesI'm programming a Minesweeper clone in Visual Studio 2010, with VB.NET, as a Windows Form Application, and I'm having trouble with the Game Won and Game Lost forms. When I show those forms, I want the game form to still be visible, so that the player can see where the mines were, but I don't want the game form to be enabled until the Game Won or Game Lost form is closed. Exactly like Windows Minesweeper does when you win or lose.
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creating code to force user at runtime to place values in textboxes. This is what I have so far. I want to be able to force the user to have to place a value in the empty textbox and change the backcolor of the textbox back to default color after a value is placed.
HTML
Public Sub Subjectvalues()
Dim SubjectValues As TextBox() = {Me.subj_ba_txt, Me.subj_bed_txt, Me.subj_dom_txt, Me.subj_gla_txt, Me.subj_levels_txt, Me.subj_lotsize_txt, Me.subj_lp_txt, Me.subj_orglp_txt}
Dim tb As TextBox
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I've tried searching and haven't found much useful information on this, I know it has to be possible, but I'm not sure how. I've got an application that bi-directionally syncs with an SQL express 2008 server. right now, I've got a hardcoded sa user in my conection string, however one feature that was asked for was to audit every change made by end users into the database. To implement this, I've created a user login and password for each user that is going to use my app (8 of them) on my sql server, however I now need to change the connection string to include each users name in the string. This is what I've got setup so far:
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this maybe an easy one for mos of you! I have a windows that is displayed as full screenThe window contains a series of images (movie posters) and the name below it. When you user clicks on a movie poster a new window appears (smaller window) in the middle of the screen.I want to force the user to close close on the small window before procedding. Currently if the user clicks outside the small window the full screen window comes to the front thus hiding the smaller window.
View 1 RepliesI'm attempting to learn VB in college. My first project is to create a program in Small Basic and then write it in Visual Basic. I'm looking for the equivalent of TextWindow.ReadNumber() from Small Basic in Visual Basic. I want to force the user to input a number not letters. I'm writing this program for the Console. Is this possible? During my testing I entered a word instead of numbers and the program crashed.
View 2 RepliesI need to create a small application that will force a user to enter an even number but i MUST use a loop. Here's what i've come up with:
Quote:
Dim bynombrepair As Byte
bynombrepair = InputBox("Entrez un nombre pair")
If bynombrepair Mod 2 = 0 Then
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I would like to try and implement a feature wherby once you have logged into an application (straightforward winforms application) and had your credetials verified the application would then force you to log on again if no activity had been detected in the application for a certain number of minutes. In essence I want to provide some extra security for those occasions when users get up and wander away from their machines for prolonged periods.
I have all the logic for logging into the application, it's just the checking for no activity over a given period and then forcing the user to log back in again that I'm not having much luck with.
I have a text box labled QTY, which feeds the QTY column on a datatable. the table then is ran through a function that takes the data and converts it to a string which my production machine can read. My problem is this, and its probably really simple (these problems usually are) how to i force the user to use a specific type of input on the txtbox so they would have to put the QTY in the format of 01 02 03 etc etc, i have it set to default to 00 but i want to force the user to haver to input 2 chars.
View 5 RepliesI want to create a simple form with 2 buttons, one to end the program and one to log the user off, I have done this successfully and have everything looking and working as it should. However, I want to force the user to pick one of these buttons before using the machine, my idea was to trap the mouse in the form so the only thing the user can do is select a button. My question is how can I do this?
View 7 Repliesi have used the following code to populate a DataGrid based on the contents of a textbox. the users searches for a name which is populated into a combobox based on the name in the combobox several textboxes are populated with data based on the data in one of these text boxes Private bindingSource1 As New BindingSource
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I have put all of the items from my Database into a Checkbox Selection, I now want to take the selection that the user makes from the checkbox and turn that into a string that I can then COMPARE through antoehr table.[code]...
View 7 RepliesLoad a combobox with a selection from another?[code]....
View 2 RepliesBasically, I need a combobox populated by data in a table column that I have created.The user will need to be able to pick more than one option.
For example:
Pizza Topping
+ onion
[code]......
I know this seems like a .Net 101 question but everybody has their own way of programming and I'm curious as to what is the preferred event for checking a ComboBox when a user makes a selection?
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