We have a question regarding VB.Net 2008. We are used control array in vb.net and third party timer controls. When handle received from external application to timer control event procedure, after this form becomes blank and controls disappear. What we have to do to persist the controls.
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Within my webpage I am loading usercontrols within a placeholder. Each of these user controls triggers a postback when an ajaxcontroltoolkit rating is changed. The problem I am having is that if I use [code]The Load_EvaluationList is what loads the user controls, if I place the IsPostBack check around those two, the controls disappear, what could be the problem
View 3 RepliesI've been coding an application over the last few months in VB.NET 2005 and have noticed that as the application is growing in size, I'm beginning to experience some strange behaviour in the IDE.For example : I have a tabcontrol docked in a form with 5 tabs. Each tab has a panel docked to it with several buttons, text fields, layout tables, datagrids etc. Sometimes immediately after saving the project, one of the tabs will go "white" and show no controls at all. There might be the odd outline of a control ( like you get when a control is hidden behind another ) but the only way to get them back is to close the project and open it again. It seems to be getting worse as the number of controls dropped onto the forms increases. Looking in the form designer.vb file I see that there are currently around 8000 lines.Is it possible that the designer file is so large that its having trouble loading/refreshing the view in the IDE ?
View 2 RepliesI have a timer on a page in ASP.NET.
After a certain period of time elapses, I want to disable the timer.
I want to put a static variable in the timers tick event that will track how many seconds have elapsed.
My question is, will this work?
If user X and Y are viewing the page will they both have separate local static variables?
What is the best method of shutting down an ASP.NET timer after a certain elapsed time?
I have a windows application that need to process som quite time consuming jobs. In my first try i did all processing under
the form thread. The result was bad response and update of the form due to the heavy jobs.To get around the problem with bad response from the form i created a new class "processing" where i put all the data processing. Then i instanciated a background worker where i in the "doWork" sub created a new instance of "processing".The "processing" class creates a timer from system.timer, and the timer drives the processing.On the Timer event Elapsed the timer starts a new thread from the thread pool.
My problem is now when i want to asynchronously close the background worker (with the corresponding function call what ever it is called ...) there is still a timer thread out there that causes exceptions for me.
1. How can i close my background worker and at the same time have the timer to be stopped?
2. Is there a way to synchronize the timer event so that the timer executes from the background worker thread?
3. Is there a better approach for me to adapt?
I want to create an array of timer in vb.net. My problem is that how will i raise the tick event for a particular timer, say mytimer(x).tick and inside the tick event there is also a button, say mybutton(x) which changes location every interval. for example:
public class blah
dim mybuttons(20) as button
dim mytimer(20) as timer
private sub form_load(....) handles me.load
for x as integer = 0 to 20
[Code]...
i dont know what to do next, all i want is to pass the button mybuttons(x) to mytimer(x) tick event, in which their index number are the same. i want to create one timer per button. how to do that? please help me and post example codes. i've researched the net but i cant understand passing variables, addhandlers, etc. i'm just new to programming object oriented.
Eg. ""vb.net" timer event trigger on purpose". This application is meant to run at all times to download a web page every minute. To avoid freezing the UI, I read that the best solution is to move the code from a While/Sleep loop to a Timer that will be triggered every minute. The problem I have, is that the user must wait for a minute before the event is triggered:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Timer1.Interval = 60000
Timer1.Enabled = True
[CODE]...
Is it possible to force this event to occur instead of waiting for it?
I wanted to know if anyone could tell me how to access the Click_event.I have a boarderles form with a panel control which has the Dock property set to fill and on the panel I have placed a Label also with the Dock property set to fill. I also have a timer running.How can I get code to execute in the Label1 click event.I've tried doing it by using the generic Click_event and also with two variations of the Click_event Handles parameters
'Alternativ 1:
Private Sub Form1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label1.Click
[code].....
If I have the following ListView, how can I attach a SelectedIndexChanged event listener to the DropDownList so I can perform a command on the respective object? Imagine I have a list of new users and I want to add them to a usergroup by selecting the group from the DropDownList.
<asp:ListView ID="NewUsers" runat="server" DataSourceID="NewUsersSDS" DataKeyNames="ID">
<LayoutTemplate>
[Code].....
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]...
How to change the visibility of controls on timer
View 2 RepliesI already created a button "enjoy button" that i want to move in a form when the "timer start button" is clicked. how do link the timer to the "timer start button" and make it move?
this is what i tried so far..then am blank first
[Code].....
i want to execute different subs at each tick , is that possible ?
View 1 RepliesI already created a button "enjoy button" that i want to move in a form when the "timer start button" is clicked. how do link the timer to the "timer start button" and make it move?this is what i tried so far..
blankfirst-------------------------------------------------------------------------------Public Class MainForm Dim DX As Integer Dim DY As Integer Dim X As Integer Dim Y As Integer Dim Counter As Double Dim Y1 As Integer Dim Y2 As Integer Dim X1 As Integer Dim X2 As Integer------------------------------------then-------------------------------------------------------------
[code]....
I'm trying to enable a timer from a SerialPort_DataReceived event. I can see that the timer is enabled, but the event does not fire. It's rather simple, but I need some help understanding why it doesn't run the code in TimerWait_Tick.
[code]...
I used a timer in my user control now when Timer_Tick event is fired I want to raise an event like Ticked. I created:
public delegate sub myDel()
public event myevnt as myDel
in Timer.Tick
I used raiseEvent myevnt. I also raised the event from a button click. This event is handled in a windows form where the control is used, My problem is event is firing when the button is clicked but not firing from the timer.tick. Is there any problem from Timer.Tick.
I have a For Loop, how can I convert that by using Timer event. I want to use Timer so I can add a 5 sec, 10 sec and 15 sec pause (interval) for each every loop. [code]
View 1 RepliesI'm a starter in VB I just need to Know how to add elapsed event to timer in VB 2005 The timer has only Tick event
( if that not in vb 2005 what version of vb that supports the elapsed event )
I am currently developing an application in which I would make a form full size automaticly.On the location where I set the time parameters, lets say, I want an event to occur every 2 hours, in which the event would be a form becoming full-sized and, on that form a clock which would show that the form will resize on its original state after lets say, 15 minutes.And also I would like to disable the Windows Start keys.I tried some codes but they were for an event if the key is pressed.For this I need the keys to be disabled as soon as I start my application.For the full size form I have used this code:
Me.Height = My.Computer.Screen.WorkingArea.Height
Me.Width = My.Computer.Screen.WorkingArea.Width
Me.WindowState = FormWindowState.Maximized
Me.FormBorderStyle = Windows.Forms.FormBorderStyle.None
I have a program that a textbox pops up for 30 sec. What I want to do is this: Have it go away after 30 sec if the user does not enter anything in it and hit return of click the ok button. But if they DO I want the timer to reset back to 30 sec. I have tried disabling and enabling the timer event--- sending a new interval, and spent some time looking in the Forums.
View 2 RepliesI already created a button "enjoy button" that i want to move in a form when the "timer start button" is clicked. how do link the timer to the "timer start button" and make it move? this is what i tried so far..then am blank first
Private Sub MainForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[CODE]...
I'm trying to create a simple media player that will scan a directory for certain filetypes, add them to a playlist then play a random playlist entry - changing every x seconds.I figured this would be simple in VB and, to an extent it was. I have the code running that chooses the directory and plays the random file.I just need to now make this repeat every 30 seconds or so.I have all the coded attached under the sub for the 'open' function of the player so it's quite flat. I think I need to use a timer here, to trigger the routine to pick and play the media every 30 seconds?In doing this I think I need to break the variables out of the function I currently have as they need to be shared between the timer loop function and the central 'creating file list' function.
I'm having trouble - I'm no coder (as you'll tell!) and although getting this far was easy I'm now (I think) bumping into threading / variable scope issues which are a bit of a brick wall.I've tried making the variables public / global by declaring in the class rather than the sub but I get errors at runtime. Presumably because of how I'm creating the windows media objects? [code]
Why after you pressed the button Button1, this application crashes without considering the event timer1??
Public Class Form1
Public timer_event As Boolean
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
timer_event = False
Timer1.Interval = 3000 '3 sec
[Code] .....
This application is meant to run at all times to download a web page every minute.To avoid freezing the UI, I read that the best solution is to move the code from a While/Sleep loop to a Timer that will be triggered every minute.The problem I have, is that the user must wait for a minute before the event is triggered:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Timer1.Interval = 60000
Timer1.Enabled = True
[code]....
Is it possible to force this event to occur instead of waiting for it?
Is there a way to adjust the timer event of the default splashscreen?
View 1 RepliesI'm developing this procedure using a timer object. The thing is the procedure is not in the timer's event procedure but I want it to depend on the timer's interval when executing, it's just not calling the timer procedure. How can u declare objects and use their event procedures in code.
View 2 RepliesI want to check the state of a certain key, but only inside timer event. So my sub will be something like.......
Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
Need code here along the lines of an old fashioned... 'If Input="Q" then......"
End Sub
I'm not sure how to check for keyboard input except for inside a 'Keydown' event.
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].....
I an trying to modify a queue within the tick event of a timer. Is this even possible? A sample follows:
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
Dim NewQueue As New Queue(Of String)
NewQueue.Enqueue("alpha")
NewQueue.Enqueue("beta")
[code]....
create a looping display (first "alpha", then "beta", etc.). What's missing? Also, why can I declare the Queue outside of a sub, but I can't fill it there as well (enqueue)?
Net_mang_Form.Prg_bar.Visible = True
Net_mang_Form.Prg_bar.Value = 0
Net_mang_Form.prg_Timer.Start()
[Code].....
Here Net_mang_Form is Form1 and this code is written in button click event of Form2.
file_send is the function of dll .
prg_Timer is the timer control .
Prg_bar is Progress bar control.