Forms :: Set Listbox Checked On Load - Activate - Shown Event

May 17, 2009

I've been having a problem setting certain items in a listbox as checked when the form is loaded. I have tried putting the code in the form_activate, form_load, and form_shown events and each still crashes when it encounters:

[Code]....

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C# - Difference Between Load Event,Activate Event And Enter Event In The Form?

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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Forms :: Trap The Checked/unchecked State Of A Datetimepicker Through An Event?

Mar 14, 2009

How can i trap the checked/unchecked state of a datetimepicker through an event. I'm trying to execute two different methods based on the checked/unchecked state of a datetimepicker when the user clicks the datetimepicker. When the user checks the dtPicker Method A is executed, when the user unchecks it Method B is executed. How can i trap it.

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Got A Checked Listbox On Form Which Saves The Checked Items?

Jun 6, 2012

I've got a checked listbox on my form which saves the checked items to a spot in my database on the .ItemCheck event.But there's a problem, when I begin checking items, I check the box and click off it, but it doesn't save. (This is if I've only chosen one item)

If I choose two or more items it will save, but unchecking them takes a lot of clicking around to figure it out.Is there a better event that I can use? I've tried the SelectedIndexChanged and that has the same result, there's a lot of clicking around in the checkboxes to end up with the desired selected items, and it does not allow a single item.

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Forms :: Event Called On Load

Jan 13, 2010

I got a combobox, that when the texted is changed, its supposed to run a query to update a field in my database. Here is the issue The event im using is TextChanged, well unfortunately when the page loads, it changes the text when populating the values. Is there a way to make this event wait to fire until after the list is populated? Ive ran into this problem before with datetimepickers, but I was able to offset it with a boolean, but this combobox is calling the textchanged event everytime it adds an item to the list.

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Forms :: VB App Terminates Before It Hits The Load Event

Mar 1, 2010

I have a simple vb.net app written using MS Visual Studio 2008 with SP1 and .NET framework version 3.5. This app simply queries a MySQL table into a dataset, makes a csv file from that data and then uses Oracle SQL*LDR to load a local Oracle table. Nice and simple.

This app runs fine on just about any computer or workstation I have tested it on with no issues but when I move it to the workstation it will live on...it shuts down just before it hits the load event. I have tried to capture any errors but so far there do not seem to be any errors generated at any point...it simply terminates with no explanation.

I even went so far as to recreate the project from scratch and still got the same result. this phenomenon only seems to occur on the very pc I am expected to deploy to.

the only thing I know for sure is that it is getting at least as far as the declaration section of the form. Once it has dimmed all objects/variables/etc..it seems to just shut down.

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Running Tasks On Forms Load Event

Sep 7, 2009

I have two forms. On form one, I have a serious of check boxes and in form two I have functions relating to those checkboxes. When the second form loads, I check the Checked State of the Check Boxes, and run the appropriate functions. This is working just fine. The problem I have, is that the second form doesn't show until the functions that have been selected have completed. It would be ideal if the form would load and then run the functions.

I don't think that I could have everything run on startup, but hopefully there is another method. I know I could load the second form and then just run the code in the previous form, but this is less than ideal, because I can't show the second form as .ShowDialog and I want to be able to split up the code into the other form so that it's not so crowded and easier to read on the first one.

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Forms :: Radio Button Checked And Not Checked At Same Time

May 15, 2010

im making dynamic sql statement rmode is a radio button and tmode is a combo box

[Code]...

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Forms :: ListBox DrawItem Event?

Mar 25, 2010

I'm attempting to redraw the DisplayMember to red if certain criteria are metSo far I have (using a dynamic form, and a dynamic panel)

Dim RevenueNominalLB As New ListBox
With RevenueNominalLB
.Name = "RevenueNominalLB"

[code].....

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.net - Form Load Event Fires Twice Using Interop Forms Toolkit?

Sep 18, 2009

I've been following a codeproject article on using the interop forms toolkit (basically a way for developers to slowly upgrade their VB6 projects to .net by allowing .net components run in VB6)

[URL]

While the .NET form is working fine in all other testing projects and environments, I've found that the Form_load event is actually firing twice once it's in executing in the VB6 runtime.Not only annoying, its forcing my initialization code to execute twice (causing all kind of problems on the second run).

If (runBefore = True) Then

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B4 Put A Command In The Forms Load Event To Take Out Any Spaces Text In Label1?

Sep 27, 2009

I have a command button that when presed allows the user to rename a label on a control ( form ) b4 its loaded.i want to put a command in the forms load event to take out any spaces b4 text in label1.

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Creating Forms And Objects Through Code In The The Load Event Of Form1?

May 22, 2011

I've been working on creating forms and objects through code in the the load event of Form1, truthfully theres a few questions I have under this one category but to start I want to create a button click event that will check what button was pressed then set that button to a variable. I want the event to treat the button that was clicked like it was that buttons click event.Here's a shortened version of my code (Lol if you can call this short):

[code]...

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Forms :: Form1 Load Event - Drawings Appear For An Instant And Then Dissappear?

Mar 3, 2010

I am trying to develope a small graphics application in VB.NET. My startup form has a picture box with a background image loaded from a file. The user can click spots on the picture box and this draws some circles on it. On exit the coordinates for these spots are saved to a file.In my form load procedure I load the background image, the coordinates for the graphics(saved from the last time the program was run), and then call the drawing procedure.

The drawings appear for an instant and then dissappear. If you click the picture box the graphics re-appear.The form works fine once you do this.I guess the picture box is refreshed by the form load event and this is causing the drawings to be wiped.(I stalled the call to the drawing procedure by using a timer and this works but I am sure there is a proper way of fixing this)Is there a way of ensuring a form is fully loaded or making sure the drawing procedure occurs only when the form is fully loaded?

HERES THE
Private Sub Form2_Load(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles MyBase.Load
Me.WindowState = FormWindowState.Maximized[code].....

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Forms :: Load Event Only Fires One Time (Loosing Handle)

Jul 17, 2011

I have a form for which the form load event only fires one time. When the program starts. It will not fire again until I end the program and restart. I have tried .show and .showdialog, but it acts the same. I have read about form load events loosing the handles, but my code looks exactly like it should.

Here is the load event code
PrivateSub frmBilling_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) HandlesMyBase.Load
LoadClients()
LoadTherapists()
LoadCPT() EndSub

Here is the code that calles the form.
PrivateSub BillingToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BillingToolStripMenuItem.ClickfrmBilling.Show()
frmbilling.show()
EndSub

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Forms :: Listbox Horizontal Scroll Event?

Oct 20, 2010

So I have a custom listbox that is displaying garbage text when scrolling horizontally. I need the custom listbox to stop an annoying flicker, but it's causing issues with the scroll. I think I could solve the issue if only I could access the hscroll event, but I don't know how to do that. I will put down my custom listbox class just in case you will need it to understand the problem.

Edit: I realized my question is a little vague - telling me how to access the hscroll event within the listbox will suffice

Public Class DoubleBufferedListBox
Inherits ListBox
Private resizing As Boolean

[Code]....

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Load And Activate Events For A Form In Program?

Nov 18, 2011

I am having three forms

1. Main page

2. Input page

3. Output page

I want load event to be activated whenever coming from Main page to Inputpage and activate event when coming from output page to input page.But what i am getting is that only for the first time load is activated and for all other only activate is called.

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How To Activate Event From Somewhere Else

Apr 14, 2011

I am creating a web browser in VB 2010. I have a search box, and I want to make it so that when I press enter in the text box, it searches. [code] The problem with this is that when I press enter, there is this annoying "beep". I don't know where this comes from. The only thing I can think of doing is making the event activate the search button, but I don't know how to do that either. How can I fix this?

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VS 2008 : Differences Between The Form Events Like Load , Initialize , Activate Etc?

Apr 14, 2010

Load , Initialize , Activate . What's the difference among them ? Up to now I was used to the classic VB6 events , but it seems that in .NET they are different . I was used to these ones :Load / Initialize : both the first step before showing a form . One appeared in VB6 , the other in VBA .Activate : triggered when a form is selected .However I thing that now , not only they differ , but they also come in a different order ...

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Activate() Not Working In Deactivate Event?

Jul 23, 2010

We have a VB 2 VB.Net migration MDI application , we have a messagebox in Deactivate event ,once you click Ok for Message Box ,the focus must be set on to the Child Form which is active.

[Code]...

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MDI - Form Activate Event Not Firing

Jul 22, 2011

I am using VB.Net for my Windows application. I will open two child form from MDI. Both forms will open. Now if I will go from form1 to form2 then Activate event for form2 will not fire.

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VS 2005 Check Grid Items If Checked ListBox Items Checked?

Aug 21, 2009

Why is this code having the opposite effect? If It's checked in the checkedlistbox it's not check in my view, if it's not check in my checkedlistbox it is checked in the grid.

EDIT: More specifically. The CheckState.Checked is always the opposite. .Checked means it's not checked.

Private Sub CheckedListBox1_ItemCheck(ByVal sender As Object, ByVal e As System.Windows.Forms.ItemCheckEventArgs) Handles CheckedListBox1.ItemCheck
Try

[Code]....

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Activate Form On MouseEnter Event Not Working

May 25, 2010

I'm trying to make my application become the active window if it currently isn't as soon as the mouse enters the main form of the application (so there is no need to click the title bar of form itself to make the window the currently active one if it's not).

It only sorta/kinda work .... I have to enter the form with the mouse 3-4-5-6-maybe 7 times ... then the window finally becomes the active one.

I know the MouseEnter event is firing each time the mouse enters the app, but the main window isn't becoming active most of the time.

Private Sub frmMain_MouseEnter(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.MouseEnter
rtbStatus.AppendText("Just got a frmMain.MouseEnter event" & vbCrLf)

[Code]....

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Create A Timer That Will Activate A Tick Event?

Jul 11, 2011

I am attempting to create a timer that will activate a tick event every 1 second until stopped by an "If" statement. The tick event should then drive a clock measuring time in units of hours, minutes and seconds. The if statements handle the time readout, timer stop and activate another form after a set number of hours have elapsed. I have tried several different methods and while my application is running, it does not add increments to the integers representing the time units, refresh the displayed time units, or perform any of the timer related functions. I assume the cause is that I just don't know as much as I think I do (which isn't much)

Here is the applicable code:

Imports Microsoft.VisualBasic.ApplicationServices
Imports System.IO
Public Class SessionManager

[Code].....

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Last Activate Control - Event Leave Calls Another Sub?

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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Output Not Shown In Listbox?

Aug 18, 2010

"For tax purposes an item may be depreciated over a period of several years. Write a program that request a description of an item, year purchased, cost of the item, the number of years to be depreciated (estimated life) and the method of depreciation (combo box), compute and display a depreciation schedule for the item similar to the schedule below. NOTE: FOR NEXT for Straight line method, DO WHILE LOOP for sum of years, DO LOOP UNTIL display table of depreciation."i don't know it this is correct 'cos when i run it, it doesn't show anything. when i clicked compute

Public Class prjactivity6
Dim intyearp%, intlife%, intmethod%, intstraightyear%
Dim dblcost#, dblstraight#

[code].....

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DateTimePicker - Extra Space Shown In Date On Form Load

Jun 7, 2010

On form load I set my datetimepicker.value = date.now
It shows up as 6/ 7/2010
I want it as 6/7/2010
How can I get rid of that extra space?

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Forms :: Start Or Activate Other Process

Mar 5, 2011

I am having a bit similar task, which I am not able to get thru. I'll explain..I have two apps A and B, B is kind of a reminder application which runs in the background..but that is not important here, thing is when App B is open, it has a button which takes user to App A, I am doing that using Process.Start("A.exe") all good so far. Problem is I need to make sure that if any other instance of App A is running then I need to jump to that instance. I am able to check for the instance running using Process.GetProcesses() but I am not able to set focus to that running instance.

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Listbox Items Colour - Two Types Of Items Populating In A Listbox (checked Listbox)

Apr 28, 2009

I am using VB.NET (version 2008). I have two types of items populating in a listbox (checked listbox). For example: lets say one is type "A" and other is "Type B". Their names maybe same so if the user sees those items in listbox then he won;t be able to determine their type until he click on them and checks out its properties. I wanted that I add each item to listbox and colour them so that blue for example means type "A" is there and red means the other. So this way I will be able to know at a glance that how many item of what type is present. I guess it may not be possible to do that in a standard checkedlistbox. I am also using component factory's krypton controls which enhance the gui of an application. But I dunno if I can progress using that.

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Determine Whether A Form Has Raised Its Shown Event?

Aug 5, 2011

I have an MDI application that can either run in TABBED or WINDOWED mode. When a user selects something from the menu a form is shown. All menuItem clicks pretty much look the same:

Dim frm As New <SomeForm>
frm.MdiParent = MDIParentForm
frm.Show()

[code].....

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Raising An Event Every Time A Form Is Shown

Apr 19, 2012

The MyBase.Shown event only gets raised the first time a form gets shown. How do I make something happen every time the form is shown?

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