How To Run Event Handler Code On Form Load

Feb 23, 2009

I have a form that is built and loaded dynamically when File/open is selected.however I now want to use the same code to open a default file and populate the form using the Form load event to call:

Private Sub OpenToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OpenToolStripMenuItem.Click how would I do this? Just incase this doesn't make sense, I want the same code to run during form load as if the user selected file/open but do not know the syntax of how to call OpenToolStripMenuItem_Click() from form load.

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Add Code In A Dateforms Load Event Handler?

May 6, 2010

I am working with database information,and I have to add code in a dateforms , load event handler .That should set the value of the date time picker to match that of the date time picker in the main form?

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Windows Form App Ignore Event Handler On Page Load

Oct 24, 2009

I have a windows application that has a tab control with 5 different tabs. Each of these tabs has a datagrid view that is populated with data on form load with data from SQL Server. I have an event handler for the datagrids for CellValueChanged that appends an asterisk, "*" to the tab, when a change is made, this is meant to mimic the same behavior in VS or SSMS. The issue that I have just realized is that on page load as the datagrids are populated this event handler is raised thousand of times. I have included an If Then statement to exit the sub if it occurs during page load, but am concerned about the performance implications, if any. Is there a better way to handle such functionality? Possibly a way to ignore the event handler on form load? If not is there a negative impact leaving this functionality in?

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VS 2010 FileSystemWatcher - When I Load The File In The Event Handler?

Sep 4, 2011

I'm using FileSystemWatcher in an application.it monitors the files in a folder, then do some processing. I monitor FileCreate, Change, Rename, Delete event.the problem is: when I copy some images to that folder, it fired the create event, but the file is not actually ready, so, when I load the file in the event handler, it failed.how can deal with this correctly?

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.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]....

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Creating Event Handler In Code Behind

Feb 16, 2010

I have a control that is created in the code behind and generates fine but I can't figure out how to create an event handler for it.I've found plenty of examples for it in C sharp, but none of them seem to apply to VB.

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Pause The Execution Of Code In An Event Handler?

Mar 9, 2009

how to pause the execution of code in an event handler.

For instance in a forms load event how can I have the rest of the programs features continue to run but wait 5 seconds before the code in the load event handler is executed?

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VS 2008 Call An Event Handler From Code?

Sep 30, 2009

Simply stated, I want to call the Panel1_Paint event handler from the Button1_Click event. Is this possible? If so, How? IE: Click the button and it paints the panel.

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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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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?

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Mouse-move Event Handler For Portion Of A Form?

Apr 16, 2011

I have a Windows form in VS2010 with a rectangular area that I draw in with Graphics.DrawImage for best performance. I want to create a Mouse-move event handler just for that area (to change the cursor when the mouse is inside it), along the lines of handlers for the other controls on the form. But since the rectangle isn't a PictureBox or Panel or other control, I don't see an obvious way to handle it. A mouse-move event handler for the entire form could affect the performance of the app.

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VS 2008 Event Handler On An External Form / Module

Dec 6, 2009

I have a simple, but important question: How can I raise events of my form1 on another module/form?My form tempalte is crowded with events (50 of them contextmenustrip events)How can I place those events on another form/module to clean it up a little?

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How To Force Form Load Event On Form2 From Click Event On Form1

Nov 16, 2010

I'm trying to execute different code depending on the button clicked (button 4 or 5) on Form1, but when I click on button5 to activitae the code on the Form2's Load event everything is Ok, but when I click the back button to return to Form 1 and click on the Button4 to activate the code on the Form2's Load event again, it doesn't active the Form's Load event, is there a way to form the form load event every time I access it from Form1? [code]

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VS 2005 : Load A Form And Allow It To Run It's Code In The Form Load But Keep It Not Visible?

Dec 14, 2009

How can I load a form and allow it to run it's code in the form load but keep it not visible. I want it to do what it needs to but but not display.

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Adding Handler To Code-generated Form And Picturebox?

Jun 18, 2009

I've got a form with a TabControl. PictureBoxes (containing thumbnails) are added to each TabPage thru a loop. A click event Handler is added for each PictureBox. When a PictureBox is clicked, a new form is created thru code and a PictureBox is added to it that shows the pictures enlarged. What I need is to add another Handler to the PictureBox in the code-generated form so that I can rotate the pictures because some of them (photographs) were taken with the camera at 90 degree angles from vertical. I've tried to come up with a solution but I always run into the problem of the PictureBox on the code-generated form needing to be declared WithEvents before a Handler can be added.

Code for adding PictureBoxes to TabControl:
'Variable p declared public withevents at class level
p = New PictureBox
img = Image.FromFile(Path.GetFullPath(picfile))

[Code].....

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Event Handler Code Cause A Object Reference Not Set To An Instance Of An Object. Error (only Present On Live Server, Ok On Dev)?

Mar 4, 2010

Here is the code for the button click event;

Protected Sub CompetenciesButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles CompetenciesButton.Click
Dim con As String = WebConfigurationManager.ConnectionStrings("foo").ToString()

[code].....

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Asp.net - Double-clicking On A Form Control In VB 2010 Design View Inserts A Script Instead Of Inserting An Event Handler?

May 8, 2012

When I double click on a form control while in the design view in a Web Application project within Visual Studio 2010, say a 'button' or a 'submit' for example, it inserts a javascript function into my .aspx file. When I do this at work it automatically creates an event handler for the control in the code-behind.How do I change this to that setting?I don't want to type those event handler subroutines every time!

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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?

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Execute Code In Load Event When Hide?

Jan 17, 2009

I have some code that currently executes when the form loads. I need for the same code to execute when the form is shown. [code]...

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Asp.net - Double-clicking On A Form Control In Visual Studio 2010 Design View Inserts A Script Instead Of Inserting An Event Handler

Sep 23, 2010

The title pretty much precisely asks the question, but I shall repeat;

When I double click on a form control while in the design view in a Web Application project within Visual Studio 2010, say a 'button' or a 'submit' for example, it inserts a javascript function into my .aspx file. When I do this at work it automatically creates an event handler for the control in the code-behind.How do I change this to that setting? I have used '/resetsettings' already, and other answers to similar questions do not solve my problem. I have reinstalled, gone through every menu I can find (though I may have missed something)I don't want to type those event handler subroutines every time!

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Call A Form Load Parent Event From A Child Form?

Jun 3, 2011

I have two forms. Form A and Form B. Form A has a datagrid that is populated from a SQL Database Table query. When a button is pressed Form B is launched that allows you to add a record to the database table. I need for the datagrid to be refreshed and show the newly added record when I close form B and go back to the parent.

[Code]...

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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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.net - Form.Load Event Not Firing, Form Showing?

Nov 9, 2010

I fear that there is something obviously wrong with my code, but I have come across a situation where the Form.Load event is not firing when I create and show my form. The form is not subclassed (as I've seen some problems with that in some searches), and I am not getting any errors thrown when I step through the code in the debugger.

I have a break point set on the IDE-created form load function (which does have the Handles MyBase.Load signature suffix) but the breakpoint is never reached and the form does display and work.The form is passed three arguments in the constructor but the IntializeComponent() function is called before anything else is done.

[Code]...

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Form Doesnt Seem To Be Firing The Form Load Event?

Sep 7, 2009

My form load event is not running. How do I track down the coulpret?davidbell

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Set FrmFrontEnd In The Form Load Event To Be The Parent Form?

Aug 3, 2009

I want one form frmFrontEnd to be the base of my application, so when i press F5 it is the first to 'open/be seen' and then from here using previous i want other forms to open. How can i set frmFrontEnd in the form load event to be the parent form? If you're not living on the edge, you're taking up too much room

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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].....

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What Happens Before Form Load Event

Dec 21, 2011

I have a form and initialize some global variables on its Load Event. There is a TextChanged event in one control (a textbox) that uses that value. The TextChanged event of the control is triggered before the Form's Load event even if I do not change anything on the TextBox, it looks like that happens when the control is loaded. Why is it doing it before the form? and what event can I trap in order to assure it's the first thing that happens?

Its as simple as this:

vb.net
Private Sub PackOutMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
ActiveFlag = False

[Code]....

My guess is that the msgbox should not appear until the flag is set to true somewhere in the code and then change the contents of txtUser, but it is shown before the form.

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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]...

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Event That Fires After Form.Load?

May 12, 2010

I'm looking for an event on a form that fires after Form.Load. Specifically, after the form has been displayed. Is there one?

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Form Load Event - How To Kill EXE

Apr 3, 2009

I am writing a program in vb.net I have to call an exe(printstatus.exe) in form load event. I successfully called exe. But I don't know how to kill that exe (printstatus.exe) when an user is logged out.

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