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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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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Mar 28, 2010
There are 2 non-modal windows displayed- 1]Form1 contains a Listbox with a list of forms 2]Form2 is the form which is selected in that list Form2 consists of a Maskedtextbox T1. In the Leave event of T1, the validation of text is done. If the data is invalid, a suitable Messagebox is displayed and Focus is set back to that Maskedtextbox (T1.Focus()).Now, if I enter any invalid data and click on the Listbox in Form1, the following things happen:
1]T1 Leave event is entered, focus being on the Listbox
2]Invalid data message box is displayed
3]Focus is set to T1(T1.Focus()) of Form2
4]After End of event, T1 Leave event is again entered. And now, Focus has changed back again to the Listbox.
5]Again Messagebox is displayed and T1.Focus() is done
The issue is, after step 3(focus set to T1), the focus is reset to the Listbox in Form1. Hence Leave event is entered twice and messagebox is displayed twice.
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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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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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Jun 30, 2009
Can i Know how to catch between these 2 event, Leave and Click?
I have one checking in a textbox Leave event. I will go check whether this ID is already exist in DB or not. If exist, I will prompt MSG box to user.
When I click on Close button while focus is on textbox, this textbox Leave Event will trigger first before Button Click event.
So, the form remains open without trigger Button Click event.
how to prevent this textbox leave event or how can i catch/control this situation?
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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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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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Aug 23, 2010
I have been working in an Migration Application where i find out some weird problem , Leave Event Fires twice causing validation to fire twice , hence i want to intercept the events to be processed by application..Hence require help in hooking the delegates so that i can get a list of the events that are to be processed .If anybody can help me out by giving some info or code as how to implement hooking in a textbox leave event/
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Jul 25, 2010
I used textbox.leave so that when user leave the textbox, it will fire a function.
Under some cases, I would like to disable this textbox.leave event.
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Nov 24, 2011
I am working on a new assignment. Our instructor wants us to code a shared leave event for three textboxes (txtBox1, txtBox2, txtBox3).I understand how to code the shared event and how to make a generic tbox for it:
Private Sub txtDescription_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtBox1.Leave, txtBox2.Leave, txtBox3.Leave
'generic textbox
Dim txtText As TextBox
txtText = CType(sender, TextBox)
We are told that if the generic textbox contains data and the data has been modified (against the database record), we need to : Determine the name (name property) of the textbox that casued the evend and Determine the value (text property) of that textbox.I know to check to see if anything is in the generic box by the length property, and if it is modified by the modified method, but how do you determine the name and value? Is it a case statement?
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Jun 17, 2012
I have some validation set on my combobox and it works as it should, but the problem I have is that the user is unable to click on the exit button, or click on the X to close the form until they have entered a valid field - would it be possible to exclude these controls from the validation? So the user can click on exit, or click on the X?
My coding is:
Private Sub Combobox1_Leave(sender As Object, e As System.EventArgs) Handles Combobox1.Leave
If Not Combobox1.Items.Contains(Combobox1.Text) Then
[CODE]...
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Jun 2, 2011
I want to add a new rows when cell leave event occurs.It shows error like Operation can not be performed in this event handler...
here is my code,
If PatientDataGridView.CurrentCell.ColumnIndex = 2 Then
PatientDataGridView.Rows.Add()
End If
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Aug 26, 2010
i have a datagridview with records, when i select a row in datagrid i need to display the values in a textbox. please help me with sample code
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Nov 30, 2010
MSDN brings nothing up, so here was my attempt at a work around.
[code]...
Because event leave calls another sub i need the last active control. I have the textbox name txtTime{0} but obviously string is not a control.
So Two questions:
1) can a string value be attached to an existing control if i know it's name? Dim attControl as Control = newTime
2) All this could be avoided in event leave if i could get the left controls name. I have tried sender. tostring etc but nothing returns the textboxs name
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Dec 15, 2010
I have a TextBox control being used to capture an IPAddress from the user.I want to be able to allow them to change that IPAddres at which point the new value will be utilized by the appropriate .NET socket class to ping that new address.What other event is used with TextChanged to indicate that the user is done making changes to the TextBox. The Leave Event?
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Jul 11, 2009
The leave event fires twice in this example. Tab order for the form controls is set to combobox1, button1, button3 Private Sub ComboBox1_Leave(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.Leave
[Code]...
if I enter 'A' in the combobox1 then combobox1 leave event will fire twice any other entry is Ok since the next control to get focus is button2 (in the normal tab order).It seems that if I try to skip the next control (based on the tab order set for the form), the leave event fires twice.
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Aug 23, 2011
Is there another way to handle the leave event of multiple textboxes other then coding in each event handler? I may not be using correct terms instead of doing this: (Existing)
Private Sub leveladjstvaltxt_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles leveladjstvaltxt.Leave
If Me.leveladjstvaltxt.Text <> "" Then
Dim levels As Integer = CInt(Me.leveladjstvaltxt.Text)
Me.leveladjstvaltxt.Text = Format(levels, "#,###")
I have 30 TextBoxes all need same formatting , so I was trying to come up with something like this: (trying)
For Each ctrl As Control In Me.Controls
If TypeOf ctrl Is TextBox And ctrl.Text <> "" Then
Dim val As Double = CDbl(ctrl.Text)
CType(ctrl, TextBox).Text = Format(val, "#,###")
End If
I am stuck though and don't know where I would place that code if this is something that is even possible. Only thing I can currently think of is in the leave event which defeats the purpose, I wanted to avoid having to place the code in 30 different textoxes leave event.
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Oct 3, 2009
I have a small doubt: (VB.Net 2005, MS-Access 2007)Is it possible to add the current row from DGV to DB as soon as the row lost its focus..i.e. whenever i add a new row in DataGridView it should automatically get inserted into the database without pressing any buttons... Bcoz i need to add more new rows dynamically & hence i find little difficult in clicking the ADD button again and again to insert each and every Record.
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Oct 8, 2009
Is it possible to detect a mouse leave to the left. For example: I have a label and when I hover over it the text changes to "Hovering", and when I leave the label from the left I want the text to change to "Exit left" or if I leave the label from the right that text changes to "Exit right".
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Jun 11, 2011
Anyone know why the Mouse_Leave event fires when you don't leave the control with the mouse pointer?Put a large button on a Form so your mouse pointer does not leave it easily.Then try this codeWhen you do, leave the mouse pointer in the middle of the button and then click the button.By the way, if you uncomment the 1st line of code in the Button Click event and comment out the MessageBox, this does not happen.Can someone please explain this behaviour?
Option Strict On
Option Explicit On
Option Infer Off
[code].....
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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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Feb 18, 2011
When i use my UserControl in a project my Mouse Enter & Leave events aren't firing, i assume i fix this with a raiseevents in my usercontrol. However when i try to do this it says something about "cannot raise base event from derived class".
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Jul 31, 2010
I've read thru Iceplug's tutorial on control arrays and got it working. I tried to add a new event by basically copying his click event code and calling it a doubleclick event. I used the proper addhandler and assigned the correct name to my sub. I have the click event changing the background color to blue and the doubleclick event changing the background color to green. The background color does not change to green. Why?
Heres the tutorial with my new code encased in asterisks ...
Code:
Imports System
Imports System.Windows.Forms
Public Class form1
[CODE]...
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Mar 30, 2009
I am using VB.NET for Windows applications. What is the difference between Load event,Activate event and Enter event in the Form and in which order the above event is executed.
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Jul 20, 2010
I'm trying to validate a few things in a form I'm building. It has a datagrid with clients info (taken from an access database) and a few textboxes where the user can type some search criteria. The thing is that those same textboxes are used to add new clients to the database and to modify a client's information if one from the datagrid is selected, so I made it that the buttons to insert and modify clients are disabled on load and thenevery time the text on a textbox changes ("TextChanged" event) they become enabled. So far so good. But then I wanted to make it so when a client from the datagrid is selected both buttons become disabled again until the text on a textbox changes (to make sure they're adding a different client and not the same one that was
selected).
I tried using the CellClick event from the datagrid to disable the buttons, but since every time a client is selected from the datagrid the info is shown on the textboxes, this triggers the TextChanged event too, and the buttons become available.So, is there a way I can tell the TextChanged event not to be triggered when the CellClick event occurs?
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Dec 15, 2010
Is it possible to set focus on the keydown event so after the button control, sets the focus into the keydown? although says often control can have focus,.Putting a button and a keydown event on a form...
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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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Jan 14, 2012
I write a code in My Form Load event as:
txtPassword.Focus()
But it is not focus in my txtpassword textbox . i focus 0 index txtUsername textbox. How i define to focus a control when form load
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