Bypass Validating Event For Exit Button?
Jan 31, 2009
I have a validating event for a txtbox called txtname. If the user tries to leave txtname for another txt box without entering their name a messagebox comes up giving an error. I have an exit button which will when clicked ask you if you really want to leave then you can choose yes or no. I can't seem to figure out how to allow the user to click the exit button while leaving the txtname blank so it would bypass the error message and only bring up the exit prompt. Here's what I have coded for the validating event and the exit event.
Private Sub txtName_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles txtName.Validating
If IsNumeric(txtName.Text) Then
[Code].....
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Jan 31, 2009
I have a validating event for a txtbox called txtname. If the user tries to leave txtname for another txt box without entering their name a messagebox comes up giving an error. I have an exit button which will when clicked ask you if you really want to leave then you can choose yes or no. I can't seem to figure out how to allow the user to click the exit button while leaving the txtname blank so it would bypass the error message and only bring up the exit prompt. Here's what I have coded for the validating event and the exit event.
Private Sub txtName_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles txtName.Validating
If IsNumeric(txtName.Text) Then
[Code]....
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Jun 3, 2011
In my form there is a "Validating" event on a textbox.
This form also has a "Cancel" button.
Is there a way to not execute the "Validating" event when the user clicks on the "Cancel" button?
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May 9, 2012
I am writing below code for validating compulsary field account no. in form.User's requirement is set focus back on field when error comes :
If txtAccountNo = "" Then
MessageBox.Show("Account no filed can't be left empty")
txtAccountNo.SetFocus
Exit Sub
End If
It's working properly. But suppose user don't want to fill form and exiting from application.Message box keep on appearing till user enters account no.
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Jan 30, 2009
I'm programming something and I have it set to where if you leave the text box blank then a message box comes up and tells you to enter a value to move on to the next text box [code]Now whats currently happening is if I click the exit button and leave the name text box blank the error i programmed will come up and tell me to enter a name. I want to be able to click the exit button while no text is entered in the name text box bypassing the error message.
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Feb 18, 2012
I want it so when the "x" button is clicked a message box will appear saying "Are you sure you want to exit?" then if "yes" it closes and if "NO" it stays open. so my code is:
Dim a As Integer
a = MessageBox.Show("Are you sure you want to exit?", _
"Vice Versa 1.0", _
CODE:...................
This should work, no? When i debug my project clicking "no" still exits my program. Is this just because it's in debug mode or am i missing something here?
Also no warnings or errors. Is there a way i can make my game pause when the message box shows? I only have it working to if the users presses "p" on keyboard. But also want game paused when message box shows, without pressing "p"
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Feb 19, 2012
I have a textbox control to take some input and a button to execute something. I want the button's click event will not work as long the validation to the textbox is successful.
Private Sub txtSuffix_validate(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles txtSuffix.Validating
If Not txtSuffix.Text = "" Then
[Code].....
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Aug 17, 2010
I am facing a issue while using the "validating" event of the maskedtextbox. I have an MDI form, in which there is a main form and a form acting as bottom bar. The bottom bar comprises of buttons for moving to "previous" and "next" forms. If suppose in the main form i have a maskedtextbox and the initial focus is set on it, then on the click event of the button (next; which is on the bottom bar form), it calls the validating event of the maskedtextbox twice. In the validating event of the maskedtextbox, i am checking some validations and if it doesnt pass, then i set [e.cancel = true]. just let me know the reason behind the triggering of "Validating" event twice?
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Sep 11, 2009
In WinForms I could handle the Validated event to do something after the user changed text in a TextBox. Unlike TextChanged, Validated didn't fire for every character change; it only fired when the user was done.Is there anything in WPF I can use to get the same result, an event raised only after the user is done changing the text?
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Aug 8, 2010
I have a datagridview and the cell gets validated in the validating event;
[Code]...
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Dec 5, 2005
i have a form hold some textboxes ,writed validating-event code and sometime set cancel=true in validatingnow,the problem is,when i click the close button of the form,the validating-event fired,and the form can't close when the validating set cancel=true,but this not i want.i think click "close" that meaning abandon all the form's data,so it not need validate.how can i do ?
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Jul 1, 2009
We have a window that has a text box on it that the user must enter in valid data before going on. So we have put in a message box letting the user know that they have to enter in the correct data before going on in the Leave event. That works just fine, but when the user press ALT+F4, or presses the X in the upper right corner of the window it still goes through the event. We would not like for that to happen. When we were using VB6 the same code was in the lost focus, and when the user pressed ALT+F4, and the X the LostFocus event did not fire, or acted like it did not fire. We have also tried moving the code to the Validating event, but it behaives similar to the Leave event? how to close a window, and either have the Leave, LostFocus, and Validating events not fire when the user Presses ALT+F4, or the X
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Jan 13, 2010
I have an application that has more than 20 text boxes used as inputs(numeric) ( in a form with multiple tabs), and from these numeric inputs I calculate many parameters and display them in other text boxes.The question is how can I trigger an event that will run the calculation procedures each time any of the text boxes numeric values change?( with out having to make procedure for each text box validated eventIs there some thing like a common validation event for any entry in any text box?
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Apr 4, 2012
I designed a DataGridView under the name "dgvTarifa" and took a chance on trying Row Validating (tried Validated, CellEnter, CellLeave, RowEnter, RowLeave all count same) event. The purpose of the code is to load the selected values of the respective columns into three textboxes in order to rephrase/revalue those and update them by pressing a button. All works fine every single line of code there's nothing wrong except one logical thing.
When the form loads the RowValidating automatically fires because I have a function that Selects the table from the Database and it fills the DataSet by then attaching it to the datasourse of the "dgvTarifa" table. After setting the datasource of the datagridview, it automatically jumps to the RowValidating event which I DONT WANT TO! It first has to finish the whole function and later when the user enters with mouse or enters/leaves a row this has to be fired. (eventually already have the CellClick event with the same code below so only RowValidating has to work properly...)
Here's the code I use at row validating
Code:
Private Sub dgvTarifa_RowValidating(sender As System.Object, e As System.Windows.Forms.DataGridViewCellCancelEventArgs) Handles dgvTarifa.RowValidating
[Code].....
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Dec 16, 2009
I am having a problem with the cellvalidating event constantly firing when the datagrid is refreshed (since the trigger that fires the event is the originally selected cell losing focus).I would like to remove the event handler for this at certain points of my code so that it does not fire but the examples I have come across on MSDN don't appear to do anything, so I guess I must be doing something wrong.[code]
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Jul 21, 2009
Winforms, VS2008 I have a mainform that has 2 usercontrols: UC1 and UC2.UC1 has a treeview with treenodes. UC2 has tabControl with few tabPages. Selecting different nodes displays different details view in the TabControl's TabPages. What I need is canceling the event when the user has selected a node in the treeview, then he selects another node (i want to be able to cancel this last event:selecting another node, all depending on a certain logic)I mean: When the user is working on a tabpage in the tabControl, when he clicks on a different node in treeview (different from the currently selected node), before displaying the new node's details in the TabControl, I perform some logic, then depending on that logic, I set
e.cancel = true in the UC2 Validating event handler. (Rememebr UC2 includes the TabControl and the user, supposedly, has the focus on a control somewhere in TabControl)
But mysteriously, the event gets never canceled and the user still moves to the next node, displaying its details in the TabControl, although I set e.cancel = true.
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Jul 8, 2010
In a Windows Form application I have a Form with a UserControl that contains a child control. I have an event handler for the child control's Validating event. On the parent UserControl I call the ValidateChildren() method. But the event handler for the child control's Validating event does not run. The CausesValidation property is set to true on both the parent UserControl and the child control. Is there any reason why the Validating event handler would not run?
The child control is a custom control derived from Panel. It contains two RadioButton controls, both of which have their CausesValidation property set to true.
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Oct 28, 2009
I have a custom text box component (inherits from system.windows.forms.textbox) that I created in vb.net (2005) that handles the input of numeric data. It works well.
I would like to suppress the validating and validated events from firing if the number hasn't changed. If a user is tabbing through the form and tabs from the text box, the validating/validated events are fired.
I was thinking that the text box could cache the value and compare it to what is listed in the text property. If they are different, then I would want the validating/validate events to fire. If they are the same, nothing is fired.
I can't seem to figure out how to suppress the event. I have tried overriding the OnValidating event. That didn't work.
Update:
Here is the custom text box class. The idea is that I want to cache the value of the text box on the validate event. Once the value is cached, the next time the user tabs through the box, the validating event will check to see if the _Cache is different from the .Text. If so that is when I would like to raise the validating event to the parent form (as well as the validated event). If the _cache is the same, then I don't want to raise the event to the form. Essentially the text box will work the same as a regular text box except that the validating and validated method are only raised to the form when the text has changed.
Public Class CustomTextBox
#Region "Class Level Variables"
Private _FirstClickCompleted As Boolean = False 'used to indicate that all of the text should be highlighted when the user box is clicked - only when the control has had focus shifted to it
[Code]....
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Mar 27, 2012
I have a single windows form application that is running in system tray icon.If the user press X button of the windows form a messagebox is displayed with Yes and No ( Yes ->close the form---No->keep the form running in system tray icon).I was thinking to prevent the scenario when the user open another instance of the application when there is already an instance running so i have used this code :
If Process.GetProcessesByName(Process.GetCurrentProcess.ProcessName).Length> 1 Then
MessageBox.Show("Another instance is running", "Error Window", MessageBoxButtons.OK,
MessageBoxIcon.Exclamation)
Application.Exit()
End If
The problem is that when i want to test this the message is displayed but after i press ok, a new messagebox appears (that one from Private Sub Form_FormClosing ).If i choose NO i will have to instance running!I have read that Application.Exit fires the Form_FormClosing event.Is there any possibility to cancel the triggering of the Form_FormClosing event?'this is the formclosing
procedure
Private Sub Form_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
Try
Dim response As MsgBoxResult
response = MsgBox("Are you sure you want to exit", CType(MsgBoxStyle.Question + MsgBoxStyle.YesNo, MsgBoxStyle), "Confirm")
[code]....
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Jan 19, 2009
I have a MDIcontainer form witch handles MDIchildren. The problem I'm having is when i open a new Mdi child and close the Main form , The app is supposed to ask if i want to save the current MdiChild. Heres my code
[Code]...
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Jan 25, 2009
I am creating a Windows Foms Application. When a form is shown, the focus is inside a causesValidation textbox. If the user presses the Escape key, the app insists on completing the validation of the empty textbox.
[Code]....
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Apr 7, 2010
When a user clicks on the little red "x" a.k.a. the form close button on the form command bar, what even is activated besides FormClosed()
I know FormClosing() is called, but I cannot really stop the form from closing after my code is run. I want to be able to show a messagebox that asks if the user wants to exit the form or not. Obviously if they click no, I want the form to stay open, how would I do this?
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Apr 20, 2009
I have an application that the main screen currently has all exit functionality removed by use of a class. I want a certain key combination to exit the program, but cannot figure out how to do this. I.E. Ctrl + X.
[Code]...
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Jan 4, 2011
I have a VB.NET form (CopyScenarioForm) with a OK button (DialogResult property = OK) and also assigned it as 'Accept Button" for the Form.
I show this form from my main Form (mainForm) using
If DialogResult.OK = CopyScenarioForm.ShowDialog() Then
DoSomething()
End if
Now when user clicks on the CopyScenarioForm.OK button, I want to validate his entries and if invalid I want to 'Exit Sub' from the OK button's click handler but when I do that the form still closes out and DoSomething() gets executed. Is there a way to stop this and keep the form alive and only exit if the inputs are valid. I noticed, if I change the OK button's DialogResult property to 'NONE' instead of 'OK' then it doesn't cause it to close. but then how Do I know how the user exited the form to execute DoSomething().
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Jan 10, 2009
I have been playing with adding labels and text boxs to a form by using code I would like to add a exit button
Private Sub MainForm_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Me.Text = "InputCode"
[Code]....
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Jul 21, 2010
I'm trying to remove the red X in at the top and the bar that it's on (don't know what it is actually called) cause all the infomation i have found on the topic is using VB6 or earlier
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Apr 4, 2009
On the page so far i have 4 text fields and a label and a button the page works up until i put the code in for the submit button then i get this error. BC30451: Name 'labelMessage' is not declared.
The code is Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Line 9: If Page.IsValid Then
[code].....
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Oct 6, 2010
Me.Close() doesn't work.
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Nov 17, 2011
I am not able to get the exit window button to terminate once I click on it. I am not sure what I am doing wrong. This is the code I am using for it: btnExitWindow.Enabled = True. Everything else is working fine when I run the program.
[Code]...
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Feb 7, 2009
I Have a Windows Form -Personnel form After you finish entering data there is a save command button become visible.this Save Btn works properly with this Function.[code]
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