Textbox.lostfocus Vb 2008 Exp?
Apr 1, 2010
Have a project which, in one place, has a form with a number of textboxes on it to receive user input. My intention is that, when user tabs out of one box into the next in the sequence, a checking subroutine is called via the textbox.lostfocus event. When I run the app, which this procedure is called by tabbing out of, say, txtTitle without entering any data, I get the Msgbox message, but it refers to the next textbox (txtFName).
It would appear that the focus moves into the next textbox before the lostfocus event is dealt with. Consequently, when the Msgbox opens, it takes the focus away from the next textbox and fires its lostfocus even, which is processed. OK-ing the warning here causes the initial lostfocus event to be processed and the Msgbox shows again. Exiting the sub for the second time leaves the focus in the second textbox. If I then use the mouse to move the focus back to the first box, I fire yet another lostfocus event for the second textbox, etc, etc
How can I trap the lostfocus event and deal with it BEFORE the focus moves into a subsequent control?
The relevant piece of code is:
[Code]...
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Jun 9, 2010
So I have a LostFocus handler for my TextBox, and it gets called whenever I press "m", "o", or "-". Why is that? [Code] Is all that's there. I thought that I might have access keys or something interfering, but I would have to be pressing Alt, "-" wouldn't work, and there's also the fact that I have no access keys on the form. What's happening?
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Dec 22, 2010
I have a TextBox in a Windows Forms application in VB 2008 (.NET 3.5) where a user can key an estimate amount. I am allowing them to key dollars and cents, and I want to round to the nearest dollar. The original code had the rounding down when the data was written back to a table, and that worked fine - I have this code in a "Save" routine that fires when the user moves to a different screen or record:
Dim est As Decimal : Decimal.TryParse(txtEstimateAmount.Text.Trim, est)
Dim estimatedAmount As Integer = Math.Round(est)
I decided that it might be nice to actually do the rounding as soon as they leave the field instead, so they're not surprised when they reload the screen and find that 1822.60 is now 1823. So I took the exact same code and added it to the TextBox.Leave event handler. And the weirdest thing happened: instead of the variable est being populated with 1822.60 after the parse, it gets set to -1! What the...?
Debugging the handler shows that the value goes into the parser correctly, and if I do the parsing manually via the Immediate window, it parses correctly, but when I let the code do it, it invariably gets set to -1. What's even weirder is that any number gets parsed as -1, not just decimals, and any non-number gets parsed as 0 (which is correct).
Has anybody else ever run into this before? I tried moving the code to the TextBox.LostFocus event instead, but with the same results. I have no idea what in the heck is going on, and obviously there are workarounds galore for this, but it just makes no sense whatsoever.
EDIT: Here's the full event handler (current behavior for which is to put -1 in the TextBox):
Private Sub txtEstimateAmount_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtEstimateAmount.Leave
' Take any dollars-and-cents amount and round to the nearest dollar
Dim est As Decimal
[code]....
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Aug 20, 2010
the scenario is the following: I have a textbox ,next to it a button. The user types a value in the textbox, he presses tab, I search this value in the database in the LostFocus event, if there is no match, a browse form shows and the user can select the desired value. After closing the browse form, the focus goes to the next textbox control (and exactly this I want to prevent). The user can click the button next to textbox to choose a value (the browser form appears), but in this case, after closing the form, the focus remains on the textbox control, because before clicking the button, the focus was on it.
So, my question: how can I disable the LostFocus event? Ok, I figured it out: I must use the validating event. It works. But in this case, if I close the form, the event fires up. How can I disable this?
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May 31, 2012
I am finding it strange that the lostfocus event is always executed once when I launched my application. in my lostfocus event, I have some code that queries the db based on the textbox value. It is supposed to be 13 characters. So when i launched my app and presses the first character in the textbox, it is givin an error. When i debug the application, I found out that the lostfocus event is getting called once when i start the application.
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Nov 25, 2009
[code]I am adding pictureboxes to my form as shown in the code above. but the problem is lostfocus event is not working.
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Jun 28, 2009
how to capture the text that a user enters in a textbox when they press the enter key? I thought there was an event that handles this but I can't quite seem to get anything to work.
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Mar 9, 2012
I want to assign a string value to a variable in the DataGridView LostFocus event. I found that I can't just do variable = "string value, it will give me the "Unable to cast object of type 'system.eventargs' to type 'system.windows.forms.datagridviewcelleventargs'" error.
The function created by double-clicking on the datagridview is:
Private Sub DataGridViewInvoice_LostFocus(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridViewInvoice.LostFocus
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Dec 12, 2009
I have two richtextboxes, richtextbox1 and richtextbox2 on top of richtextbox1 with richtextbox2.visible = false on form load. Whatever is input in richtextbox1 is placed in an array when rictextbox1 loses focus. Now I have a checkbox that when enabled, hides richtextbox1 and shows richtextbox2. On the first time richtextbox2 is shown, i want it to display the contents of richtextbox1. This is achieved by setting a boolean flag (firsttime=true) on form load, then in the checkbox code if firsttime = true, it displays content of richtextbox1 and sets firsttime to false.
[Code]...
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Feb 23, 2009
in VB.net windows From with 2 TextBox Control (in Visual Studio 2008)
property:
name: TextBox1
text: test1
[Code].....
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Mar 26, 2011
With a listbox visible, I have clicked on the windows form hoping to use the listbox.lostfocus event to let me hide the listbox - but the event does not occur. I suppose I can use the form.click event to hide the listbox, but how would I get the form to accept focus?
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Apr 27, 2012
I have a class library in which i have created a simple new application with a form and added AX webbrowser control on it. In order to apply events on popup of webapplication shown in webbrowser (or to detect whether a pop-up has opend), i am using LostFocus event on webbrowser control, it was working fine till now.But after i reset my IE settings (Internet options->Advance->Reset) the event stopped working. I am using IE9 and the class library is developed in VB.NET (VS 2010).
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Jan 10, 2010
I have some richtextboxes which display contents of a jagged array. When the RTB loses focus, contents of the RTB are placed in the array (so new entries in rtb are updated in the array). This works OK with moderate numbers (for example jagged array of type (200)(){}) but in a situation where the array is (1500)(){} the rtb takes approx 3-4 seconds to reload when it loses focus. I was thinking of eliminating some lostfocus of triggering with this logic
On RTB LostFocus
If 'nothing was changed in the RTB' Then
Return
[code]....
Nothing was changed in the RTB means that the user Focused in the RTB, scrolled around, but did not change the content in any way. How would I achieve that codewise? In addition, is there a better way to keep the RTB updated with it's corresponding jagged array from LostFocus?
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Sep 22, 2008
I just added a gotfocus and lostfocus handler for all of my textboxes. Below is my routines to call on gotfocus/lostfocus.
[Code]...
Now, my issue is that this works great if you use the mouse and click around in the textboxes. However, if you hit the TAB key to move around on the screen, the LostFocus event doesn't seem to work. All of my textboxes backcolor remains lightblue. What did I do wrong? What do I need to do to fix this problem?
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Apr 11, 2011
Background: I have a winForm app that registers a user in the database based on the information provided, auto-generates a random password and username, and e-mails the user a link to take an application based on the marketing company selected.
Problem:
When the user selects the lbCarrier(s), the Bundles don't show up in the listbox b/c the lostfocus feature doesn't work for asp.net. What code can I use to auto-populate the Bundles listbox based on what is selected in lbCarrier listbox for ASP.NET.
Code from default.aspx.vb:
Private Sub lbCarriers_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles lbCarriers.LostFocus
Dim splt() As String
[Code].....
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Mar 23, 2009
This is a code in event lostFocus:
[Code]....
The code shows the msgbox all the times when the combo lostfocus...
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Apr 20, 2010
I have the following code and I can't get the lost focus to work.
Private Sub txtSpeed_KeyDown(ByVal eventSender As System.Object, ByVal eventArgs As System.Windows.Forms.KeyEventArgs) Handles txtSpeed.KeyDown, txtSpeed.LostFocus
[code]......
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Oct 26, 2010
I've read you should use the "Leave" event instead of "Lostfocus" for your code. But if you put something like this inthe leave event,Me.TextBox2.Select()The Leave event fires twiceBut if you put that code in the LostFocus event it only fire once. Is it ok to use the LostFocus or should I add additional code to handle the Leave event firing twice?
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Jun 29, 2009
I want to make a function in VB 2008 with which u can make a textbox change some letters within the textbox when u click a button. So example: Textbox1 has got in it: url...Then when I click button 1, it has to change ....
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Aug 30, 2011
I wanted to simply on click a button to add those newly created textboxes to an array of textboxes. Starting with those labeled "Address". But I am finding this very difficult. I am able to add those originally on the form into the array very easily. But am unable to add the newly created textboxes into the array.
Here is my code so far below.
Public Class Form1
Dim MyBoxes() As TextBox = {Address, UserName, Password}
Dim Numbox As Integer = 1
[Code]....
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Oct 19, 2009
Im trying to make it so when the user clicks it will copy its text to the user clipboard butttt the textbox is disabled. How would i make it so when the user clicks on it he/she can still copy it but not change the text inside?
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Nov 15, 2011
I'm creating a Multiplayer LAN game in VB 2008 here is what I wanted to do I created a textbox named txtbuttons.text. If I inputed a value, for example 23856 in the textbox.The Values will be distributed in different textboxes.
example
Value of txtbutton.text = 23856
2 will be distributed to txtAns.text
3 will be distributed to txtAns2.text
8 will be distributed to txtAns3.text
5 will be distributed to txtAns4.text
6 will be distributed to txtAns5.text
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Mar 15, 2012
I'm creating a Multiplayer LAN game in VB 2008 here is what I wanted to do I created a textbox named txtbuttons.text. If I inputed a value, for example 23856 in the textbox.The Values will be distributed in different textboxes.
example
Value of txtbutton.text = 23856
2 will be distributed to txtAns.text
3 will be distributed to txtAns2.text
[code]....
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Sep 29, 2009
can somone just post a code of
1. Writing the last line of .txt into textbox1
2. Adding line from textbox to .txt
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Jan 8, 2010
Is it possible to have a Textbox on a form that when the user inputs data, ( during Runtime )that data remains in the Textbox for good and the Textbox then becomes read only ? Is it also possible to make it so that the CD with the programme on, is in the PC when the programme is being used. Perhaps writing the Textbox data back onto the CD ?
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Nov 2, 2009
How can I teke value from textbox from seting my timer?I woud like write examle 3 or 6 min in textbox.numbers in the textbox it should be limited 1 -10 min,how cann I do that here is the code for NumericUpDown,it is posible make this from texbox ?
Dim Minutes As Integer = CInt(NumericUpDown1.Value)
Timer1.Interval = Minutes * 60 * 1000
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Oct 25, 2009
I am currently trying to load some data from an mdb file to a textbox. so far iv done it by using a datagrid but id rather remove the datagrid.
So far ive gotsql = "select Customer_FName from Customer where Customer_ID= '" & txtCustomerID.Text & "'"
dtAdapterGrid = New OleDb.OleDbDataAdapter(sql, myConn)dtAdapterGrid.Fill(dtSet, "Customer")
Not sure what to do from here. The sql staement should only return one result so the row will be 0.
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Dec 26, 2009
I've been working on an auto talker, and so far, no errors. The only issue im having is to make textbox 3 to work with textbox 1 and textbox 2. I'm using Checkboxes, so You must check the ones you want. Like said, 1+3 and 2+3 doesn't work. It will only spam Textbox 1 OR textbox 2. Textbox 3 will not show up.
Heres my code :
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If CheckBox1.Checked = True And CheckBox2.Checked = False Then
Timer1.Start()
ElseIf CheckBox1.Checked = False And CheckBox2.Checked = True Then
[code].....
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Aug 19, 2009
Is there also a way to make it so that there can only be numbers in a certain textbox?
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Jan 18, 2012
im trying to create an instant messenger i have textbox where user can type anything like url etc..how do i get the url string that entered in textbox when i press button.i just want to change the string url using replace function.
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