RunWorkerAsync... Then Long Delay Before BackGroundWorker Starts?

Jan 21, 2011

I am having a problem with an application which uses a couple of classes inheriting from background workers.One is used to write data to a database and the second is used to determine when the connection can be established again should the connection be lost.t all works fine most of the time on my machine apart from one occasion when I experienced the problem described below.But I've not been able to replicate that since then.The class which writes to the database contains a queue (a list)When adding an item to the database the planned course of events is:1 An item is added to the QueuedItems list.2. If the background worker is not busy then RunWorkerAsync is called to start it.

Dim Result As Boolean
Dim Carcass As String
Dim Delay As Integer = CInt(My.Settings.DatabaseRecoveryTimerInterval * 1000)

[code].....

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Communications :: Long Delay While Closing Port?

Nov 7, 2008

I have noticed that I am getting a long delay while waiting for the serial ports to close.

Heres my code.
Code:
Using comI As IO.Ports.SerialPort = My.Computer.Ports.OpenSerialPort(strPort(0))

[code].....

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Winforms - Long Delay After Reading Events From WMI?

Jul 27, 2009

I have a windows user control that reads events from the application log of a remote server. I can read in the information alright, and it appears to happen very quickly, however the thread hangs up for about 30 seconds afterwards and keeps my application from displaying the log.

I am afraid that this is probably caused by my lack of experience in dealing with threads, but I cannot be certain. I am definitely open to any suggestions with my threading here.

The easiest way to see what I am referring to is when the btnClear_click event handler is called. After jumping through the threading worm hole, it goes to the LoadFilteredEvent method. The results load fairly quickly from the ManagementObjectSearcher, but it hangs up for 30 to 60 seconds on the next statement.

[Code]...

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Time Delay - Make GUI Program To Delay Before The Next Command

Dec 21, 2009

I know that time delays have been covered before around almost everywhere. however a method that forgoes forcing the GUI to become temporarily non-responsive, is all but a myth, or at least to my findings. i have the need for a GUI program to delay before the next command, however using the current method, detailed following, it causes the desired effect however it dose make it much less polished as when you click anything else on the GUI it goes un-responsive for the directed time. [Code] make a sub called say Tdelay( milseconds as integer) and have it run a loop as many times as the milseconds variable indicates and each time making the thread delay for 1 milsecond and then update the GUI/form in some way, then re-loop.

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Program Starts When Computer Starts?

Jul 16, 2010

I want to make that program starts when computer starts. I have no idea how to do that.

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VS 2008 Way Of Coding In Stead Of Writting Long Long Paragraphs

Sep 18, 2011

Is there a easer way of coding in stead of wrighting long long paragraphs like this in one line [code]All of this is on one line and i got lots of info to put down.."The game will begin on your 16th birthday with your mother waking you up. Today you are to go to the castle for the first time. Leave your bed and open your dresser for a Strength Seed. "

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Cancel Backgroundworker - Got The Error Message" This BackgroundWorker Is Currently Busy And Cannot Run Multiple Tasks Concurrently?

Dec 14, 2009

in my button click event i ececure

If BackgroundWorker4.IsBusy Then
BackgroundWorker1.CancelAsync()
End If[code]....

after proceess completed if press the button again.i got the following error msg

This BackgroundWorker is currently busy and cannot run multiple tasks concurrently.

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Private Declare Function BlockInput Lib "user32" (ByVal FBlock As Long) As Long?

Dec 26, 2009

In Visual Studio 2008 I am using :Private Declare Function BlockInput Lib "user32" (ByVal fBlock As Long) As Long To stop input from occuring during a search-replace operation.

BlockInput(True) ' do not allow input during search and destroy
Dim cursorIcon As Cursor
cursorIcon = Cursor
Cursor.Current = Cursors.WaitCursor

Then setting it to false at the end of the operation. It did not work, so I thought maybe it was because I was calling it from a child window, so I created a function in the mainwindow, and ran it like this:

FrmMain.BlockFrmMainInput()With these functions is the Main window:

[Code]...

It did not solve the problem. I thought maybe it was because I was running under the debugger, so I tried compiling and running it debugger-free, but that did not do any better. I am still getting input when I double-click the mouse on either form.

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Backgroundworker Inside Another Backgroundworker?

Apr 2, 2012

i'm in the need to start a backgroundworker inside another one.Now...The first one BGW starts a for cycle, and inside this one there is the second BGW that has to upload an image to a server.The trouble is that, the progress event and the complete event of the internal BGW are never called.

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Does App Starts Csc.exe Processes?

Jun 15, 2010

For some time ago i have notice that my App on every start make a call to csc.exe and starts it. I know for sure that that did not happened before and I can not find out why this is happening now, or better to say: what did I do in code to make this happened? I have google-it and found out that csc.exe is some kind off on-the-fly compiler for C# (If I understand it correctly ) but my App is in VB.net so I am a bit confused. Can someone explain it to me in general what have I did in my VB.NET code to make my App on every start calls csc.exe?

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Run When Windows Starts?

Feb 2, 2010

Im using this , but were shall i use it , on form load ?

Dim regKey As RegistryKey
regKey = Registry.LocalMachine.OpenSubKey("SOFTWAREMicrosoftWindowsCurrentVersionRun", True)
regKey.SetValue("MyExecutable", "C:MyExecutable.exe")
regKey.Close()

Also i have a checkbox on my form , how can i have it that if its checked before i close the application it will open up next time in start up windows , if its unchecked before i close it wont startup when windows starts ?

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How To Set A Delay

May 11, 2009

how to set a delay in my code so that it waits for a new page to be returned before it cliecks on another button?

[Code]...

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Customactions Does Not Starts EXE After Install?

Feb 7, 2011

the issue is that customactions class in my VB 2010 code, correctly configured, does not start the program after installation, neither sets the autorun, it seems that subroutine OnAfterInstall isn't invoked at all.

Note that process termination before installation (for upgrading purpose) eventually works.

[Code]...

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VS 2008 Button1 Starts New Sub?

Sep 19, 2009

I am making an auto login program, and what i am trying to do is have it so when you press a button (button1) it will start the web browser sub. I have to have the code for the login in the web browser sub because otherwise it wont work. But I want it so that the button will start the code in that sub.

Public Class Form1
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted

[Code]....

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How To Add Timer Delay

Apr 2, 2010

I'm trying to figure out the best way to add delay. From looking online I believe a timer would work best but I'm having trouble with the code. Basically what I'm trying to accomplish is a GPI debounce set to 200ms. the Timer3 properties interval is set to 200 and its enabled = false. Here is what I am working on.

[Code]...

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How To Make A Delay

Sep 6, 2009

How would i make a delay,

so that when you click a butten it will delay, then continue?I like.....

CODE:

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How To Put A Delay In A VB Application

Jun 22, 2010

i'm developing an app where i'm reading a value from a device and putting it into a mysql db, i have setup a function where the vb will calculate whether the new value being read has changed by 3% from the last value and if it has run the mysql query. What i need to do it read the value into a variable, then a new value and compare the two with the % function, how do i read a value and maybe add a delay before reading the new value (and it being overwritten) and doing the calculation?

Here is my current code:
Imports System.Data.SqlClient
Imports System.Data

[code]......

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Play An MP3 In NET Without Delay?

May 25, 2010

I'm working on a game that plays MP3s at various points using the Windows Media Player component and it takes a long time to load and play MP3s. Would anyone know how to decrease the load time? I've considered multi-threading but I'm not sure how I would do that or if that's even the proper direction.

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Set Delay Between Code?

Dec 8, 2006

I would like to enquire how I can set a delay in between chunks of code.For example, after some code which interacts with a server, I am supposed to get a corresponding information from the server before it is appropriate to proceed on to the next part of the code. As the server response is not immediate, therefore an arbitrary delay is needed.What is the proper code format that I need to add?

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VS 02/03 .NET + VB6 Web Application Delay?

Dec 1, 2011

I am dealing with a web application that includes VB.NET (UI) & VB6 middleware (DLLs).One of our installs, a Win 2003 Server/IIS 6 environment shows a 2 minute delay after the application login page.The application has been added to Trusted Sites & is not in a DMZ. It uses Forms authentication.

I am looking for ideas on what might be causing the delay. The code is difficult to access and I would like to leave that as a last resort. I realize it's not much to go on but I am hoping someone here has run into a similar problem.

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Service Starts Then Stops Automatically

Jul 22, 2011

I have a solution that has three projects. One is a service, one is a form, and one is a class library. I use the form for debugging, my logic is complete now I would like to just call.

[Code]...

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Application - Send Info To The App When It Starts Up?

Jun 25, 2009

In some applications, like taskkill.exe you can send info to the app when it starts up. By that i mean taskkill.exe /f /im 123.exe.... how do i make my VB.NET app read that info on startup so i get it in a string like this "/f /im 123.exe". I have absolutly no idea what this is named,so thats why im asking here.

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Can't Get The String Starts With To Work Properly

May 17, 2010

I need to check if a label starts with a certain text, but it wont work!Here is the code I have:

Dim str1 As String = Label1.Text
Dim value As String = "abc123"
If str1.StartsWith(value) Then
'do something
end if

May I also add that the label i'm checking (the text inside it) has no spaces, i don't know if that makes any difference.

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Change The Column Which Starts With Red Colour To T1,T2...Tn?

Jun 23, 2009

[code]...

i have a text file like above. I want to change the Column which starts with red colour to T1,T2........Tn. I used this code.

[code]...

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Choose What Form Program Starts With?

Jul 8, 2010

I started work on form1 but now want to make form2 the program form htat starts first now?

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Create A Program In VB That Starts Out With A Penny Pay For The First Day?

Sep 18, 2009

I am a student trying to create a program in VB that starts out with a penny pay for the first day, two pennies the second day, four pennies the third day etc. There is a drop down box that the user picks a day of the month. The program calculates to that day of the month. I am not asking for the code, I need help understanding how the counter initializes and stops on the day the user clicks on.

[Code]...

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DataViewGrid - Determine That The Selection Starts At Row 3?

Jan 21, 2012

I can get the collection of selected rows but I cannot find a way to determine which is the first selected row. E.g. the table has 20 rows, the user selects rows 3,4,5,6 using the mouse on the rowheaders.How can I determine that the selection starts at row 3?

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Display Certain Record From DB As Program Starts?

Jul 13, 2010

I've got a very simple SQL database program that lets me change user information in a table. I have two textboxes that show the user information but I want it to show a specific record as the program loads.

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Execute An Action Every 5 Program Starts?

Feb 10, 2010

execute an action every 5 program starts?

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How To Play MP3 Music When The Program Starts

Jun 22, 2010

I'm working at a project and I want to add a MP3 song an play it when the program that i made will be started.

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