Regex - Cancel Handler On A KeyUP Event?

May 11, 2012

There a way to use e.Cancel () on a keyup event?

I'm trying to validate a textbox with a Regex and I need to cancel the event if it no meets the Regex expression, or delete the key pressed to meet so that the expression

For Example:

Dim rex As Regex = New Regex("^[0-9]{0,9}(.[0-9]{0,2})?$")
Private Sub prices_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Textbox1.KeyUp,

[Code].....

View 1 Replies


ADVERTISEMENT

VS 2008 Bug With E.Keycode On KeyUp Event Handler

Dec 31, 2009

I have this code

If e.KeyCode = Keys.D0 Or e.KeyCode = Keys.D1 Or e.KeyCode = Keys.D2 Or e.KeyCode = Keys.D3 Or e.KeyCode = Keys.D4 Or e.KeyCode = Keys.D5 Or e.KeyCode = Keys.D6 Or e.KeyCode = Keys.D7 Or e.KeyCode = Keys.D8 Or e.KeyCode = Keys.D9 Or e.KeyCode = Keys.Oemplus Then

[Code]....

The output WILL be 189 when I press the - sign. But when I check "Keys.OemMinus" it stands for 189 and when I replace "Keys.OemMinus" with 189 it won't work either!

I checked the Resources file and it's correct. The picture just doesnt change, only shows the last pressed button...

View 4 Replies

.net - Event Handler Is Never Called Because The Original Event Is Raised In Another Event Handler?

Apr 18, 2011

The event handlers in my parent class are never called though the events are raised in the child class.

The Code:

Public Class childForm
Public Event checkboxchangedEvent(ByVal checkbox1 As Boolean, ByVal checkbox2 As Boolean)
Private Sub checkboxchanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged, CheckBox2.CheckedChanged

[code]....

View 2 Replies

VS 2008 Call KeyUp Event From MouseUp Event For A Textbox?

Aug 16, 2010

In VB6 we had a code inside textBox_MouseUp to call textBox_KeyUp(-1, 0) and the signature of KeyUp was
Private Sub textBox_KeyUp(ByRef KeyCode As Short, ByRef Shift As Short) Handles textBox.KeyUp

Now when I migrate to .NET I changed the KeyUp event to Private Sub textBox_KeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles textBox.KeyUp

How can I do this call textBox_KeyUp(-1,0) now from textBox_MouseUp event?

View 1 Replies

Firing An Event Handler From Within A Nother Event Handler?

Aug 27, 2011

How do I get a Event Handler to fire from within a nother Event Handler?

View 6 Replies

Cancel Save Event - E.cancel

Sep 21, 2011

i want to do this: when user click save button, the form must be check first..

if user did not insert the required data, user are not allow to save form..

the code:

Private Sub AssetMasterBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AssetMasterBindingNavigatorSaveItem.Click

[Code].....

View 5 Replies

Get System Wide KeyUp Event?

Jul 15, 2011

Currently I am able to see if a key is currently pressed via the GetAsyncKeyState function. Currently I just simply have a timer running in the background that constantly checks if a certain key is pressed in order to run a command. However my issue is if the user holds down the key it will continually run that bit of code over and over per timer tick. Is there a way or another function to detect a keyup or keypress only. This is my current code to detect keys:

Public Declare Function GetAsyncKeyState Lib "user32" (ByVal vKey As Windows.Forms.Keys) As Integer Public ReadOnly Property CurrKey(ByVal key As Windows.Forms.Keys) As Boolean
Get Return CBool(GetAsyncKeyState(key))
End Get
End Property

View 1 Replies

KeyUp Event If Keycode = Alpha Or Numeric

Apr 28, 2010

[Code]....

whats the simplest way to achieve this? is there a built in value for this or regular expressions?

View 4 Replies

VS 2005 : Call KeyUp Event Programmatically?

Apr 15, 2010

I am needing to call the KeyUp Event of my richtext box. Anyone know how I can do this?

rtbScript_KeyUp(Sender As Object, e As System.Windows.Forms.KeyEventArgs)

I'm not sure what I would enter into this.I'm wanting to call the Period Key going up. I think the key is oemsPeriod or something like that

rtbScript_KeyUp(??, ??)

Not sure what I need to put in these two fields.

View 3 Replies

VS 2008 Error 2 'KeyUp' Is Not An Event Of 'Microsoft.Office.Interop.Excel.TextBox'

Mar 29, 2010

Error2'KeyUp' is not an event of 'Microsoft.Office.Interop.Excel.TextBox'. how can i fix this error

View 12 Replies

VS 2008 Error2 'KeyUp' Is Not An Event Of 'Microsoft.Office.Interop.Excel.TextBox'?

Nov 4, 2009

Error2'KeyUp' is not an event of 'Microsoft.Office.Interop.Excel.TextBox'.

View 6 Replies

Remove An Event Handler From Within The Event Handler?

Mar 21, 2012

remove an event handler from within the event handler?

I have a class that gets data from a hand scanner. When the scan is complete and the data is validated, the class fires a custom "ScanComplete" event and returns the data in a custom EventArgs.

In the calling program, I'm creating an instance of the scanning class and adding a handler for the "ScanComplete" event. In the event handler I get the data that was scanned and then remove the handler.

It seems to be working but it feels wrong to remove the handler while I'm running inside the handler. Will this cause a problem?

View 1 Replies

ApplicationExit Event And Cancel Event In App With No Forms?

Jan 20, 2010

ApplicationExit Event and Cancel event in app with no forms?

View 8 Replies

Airline Reservation Application - Creat An Event Handler For The FlightBindingSource's PositionChanged Event?

Nov 27, 2010

I'm trying to complete this airline reservation application, but having a problem in this part of the question:Creat an event handler for the FlightBindingSource's PositionChanged event: select FlightBindingSource in the class Name combobox then select position changed in method name combobox to creat the FlightBindingSource's PositionChanged event handler. Write a code to access the currently displayed flight object and pass its flightNumber to method DisplayPassengers as a decimal.This Is my code so far:

HTML

Public Class AirlineReservationForm
Private database As New ReservationsDataClassesDataContext()
Private Sub FillAll()[code].....

View 13 Replies

Event Handler For Dynamic Controls - Add An Click Event To Labels

Oct 20, 2009

Below I create an array of labels. I would like to add an click event to my labels. Can someone point me in a direction?

[Code]...

View 12 Replies

C# - Adding Own Event Handler In Front Of Other Event Handlers

Sep 24, 2010

When I utilize AddHandler in VB to add my own method to the Click event :

AddHandler Button.Click, AddressOf myButton_Click

I see that my code executes last - after other event handlers for the Button_Click event. Is there a way to insert my event handler in front of other events so that it executes first?

View 3 Replies

Keyup Event - Get The Current Value Of The Current Row And Column

Sep 12, 2011

I have a datagridview having 3 columns (qty,scraft factor,actuall qty). What I want is if the user encode 50 in qty and 2 in scraf factor, actuall qty will automatically computed based on qty multiply by 2. I was using keyup event. Now I am using endedit to get the current value of the current row and column, now the problem is if the amount to be encoded is more than one digit it will not accept because of endedit. What event do I have to used? or any solution with this scenario.

[Code]...

View 1 Replies

ComboBox Cancel SelectedIndexChanged Event?

May 21, 2009

I have a ComboBox that contain ProductIDs and a DataGridView that lists Categories which a product can be a member of. My DataGridView list ALL categories, however, it has a checkbox column that get checked when the ProductID is a member of that Category, otherwise it is unchecked. A user may also check or uncheck a category checkbox then save.

The problem is, if a user forgot to save before changing the ComboBox, then his changes on the previous ProductID is gone How can I give the user a chance to either save or ignore the changes done on the previous ProductID (before selecting a new ProductID)?I searched the internet for an answer and I found the following code but it is in C# and I am not sure if it solves the problem or not!

[Code]...

View 3 Replies

C# :: Reliable Way To Cancel ItemCheck Event On CheckedListBox?

May 4, 2012

Does anyone know of a reliable way to cancel the ItemCheck event on a CheckedListBox? I am in a situation where the ItemCheck event should basically discard changes on a form, however, if the person decides to cancel the discard I would like the ItemCheck event not to fire so as not to change anything.

View 2 Replies

Cancel A Form Loading In Its Load Event?

Oct 18, 2010

what's the best way to stop a form from displaying in its Load event.I initialise a form using the following code:

Dim MyForm as new MyCustomForm

In the Load event of MyCustomForm, I ask the user to select a folder and use that to populate a listbox on the form.folder.If the user presses Cancel instead of selecting a folder, I don't want to display the form. Right now, I just call Me.Close in the Load event, but that still causes the form to briefly appear and disappear in the background. Also do I need to call Me.Dispose?

View 3 Replies

Button - .NET: MessageBox With YesNoCancel - No & Cancel Triggers Same Event?

Feb 13, 2010

I have a message box with YesNoCancel button..

Pressing Yes will do some action and close the app - works fine,
Pressing No will do nothing and close the app - (see below),
Pressing Cancel will Do nothing and keep the app open - (see below).

I'm using DialogResult.No for No button and DialogResult.Cancel for cancel button. But pressing either of them triggers DialogResult.Cancel event. Whats the problem?

View 1 Replies

Cancel The Input On Textchange Event Depending On A Condition?

Jun 18, 2009

i want to cancel the input on textchange event depending on a condition, how? for example, as user type in textbox, it fires textchange event, in that i want to do some condition testing, if value is true then accept new character or cancel the new input.

View 5 Replies

Control Cancel Event Of Cyrstal Report Print?

Jun 21, 2010

I have written a code to print the crystal report instead of using print button in the crystal report viewer control.(I have done this in order to keep record of printed pages.) So, now there is a print button in my form, which upon clicked will show the printer select dialog box to print the crystal report pages. Now I need to track the event when user presses the Cancel button shown in the print dialog box?

View 1 Replies

Radio Button Checked Change Event Cancel

Mar 9, 2011

I have two radio buttons. I fhte user swtich between radio buttons, I need to popup warning message and if user confirm, then only I need to swtich to next radio button. Otherwise I shouldnt switch. I am using CheckedChanged event. As by the time I popup warning message, control is already switched. I tried adding and removing event handler.

[Code]...

View 3 Replies

VS 2005 - How To Cancel Arrow Buttons Event (TabControl)

May 23, 2009

When I click the left or right arrow buttons on the keyboard my tabcontrol tabpage changes from one tab to another. How can I cancel the arrow buttons from changing the tab pages? In other words how can I disable the arrow buttons when the tabpage has focus? Is it possible to do this without extending the base class?

View 5 Replies

VS2008: Unable To Cancel Tabpanel Validating Event?

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.

View 4 Replies

A Handler For Event X?

Jul 30, 2011

Is it possible to determine using VB.NET whether a certain event has any handlers attached to it? I don't own the event, in this particular case I want to know which of the items in a Windows.Forms.MenuStrip have their ToolstripMenuItem.Click event handled.

View 1 Replies

.net - Asp.net Event Handler Not Firing?

Apr 1, 2012

I've been looking for a solution to this for several hours now and cannot find a solution.

The Scenario:I have a masterpage baseclass (called basemaster)All of my master pages inherit from basemaster
basemaster defines an event 'Public Event HandleClickEvent As EventHandler'I have a masterpage named master1
master1 defines an event handler 'Public Shadows Event HandleClickEvent As EventHandler'master1 has a user control named usr1 usr1 has a button that raises event ButtonClicked when clicked I have a page (thePage) that uses master1 thePage has a button click event handler that it registers like so: 'AddHandler Master.HandleClickEvent, AddressOf HandleTheClick' master1 has code something like:

Protected Sub Usr1_ButtonClicked(ByVal sender As Object, ByVal e As System.EventArgs) Handles Usr1.ButtonClicked RaiseEvent HandleClickEvent(sender, e) End Sub when thePage loads I see it register the handler on master1 when the button is clicked, Usr1_ButtonClicked is fired and I step through the RaiseEvent but HandleClickEvent on thePage is never reached.

View 1 Replies

Add An Event Handler In Program?

Jan 12, 2012

This code is part of AjaxControlToolkitSampleSite. To be exact, it is in the AsyncFileUpload control[code]...

View 4 Replies

Add One Event Handler Name Clearallboxes?

Feb 12, 2011

how to add one event handler name clearallboxes that handles the TextChanged event for both examples(Customer text box and Total text box ) This event handler should clear the values in the text boxes that display the results.

View 4 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved