Copying Large File With Background Worker?

Aug 30, 2010

I'm trying to browse for a large file and copy it with a background worker but get the folling error:"Current thread must be set to single thread apartment (STA) mode before OLE calls can be made. Ensure that your Main function has STAThreadAttribute marked on it. This exception is only raised if a debugger is attached to the process."

Code:

Private Sub BW_CopyEXE_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BW_CopyEXE.DoWork
Dim fullFilename As String

[code]....

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Is there anyway to reliably know when a large file has completely finished copying to a particular folder? For example, Computer1 copies a large file to Server1Share1. On Server1Share1, I want to do something AFTER the file is done copying, without Computer1 intervention.

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VS 2010 Reliably Know When Large File Is Done Copying?

Jul 5, 2011

Is there anyway to reliably know when a large file has completely finished copying to a particular folder? For example, Computer1 copies a large file to Server1Share1. On Server1Share1, I want to do something AFTER the file is done copying, without Computer1 intervention.

[Code]...

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Read .doc File To Textbox With Background Worker?

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read .doc file to textbox with background worker?

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Apr 16, 2009

I am having difficulty uploading a file using a background worker class...I've noticed that it is unable to transfer files like "mp3" ".exe" and others...although my application works fine on ".txt" and '.doc" and similar types otherwise it throws the following error following is my code for FTP...Also would like to know that the builtin FTP libraries are capable enough to make a FTP class application with RESUME capability? my files can be huge like 80MB to 100MB. [code]

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VS 2010 - Want Background Worker To Use File Copy?

Aug 17, 2011

i want background worker to use file copy, how?

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WPF Background Worker Not Recognizing Worker Object

Mar 11, 2009

I have the following code that adds a background worker into a VB.net WPF project:

Imports System
Imports System.ComponentModel
Imports System.ComponentModel.BackgroundWorker

[Code].....

And I get the following error for the DoWork worker event:

Handles clause requires a WithEvents variable defined in the containing type or one of its base types.

It seems like it's missing something in the Event declaration, but can't find it.

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Copying Large Files And Determining File Size Mid Copy?

Oct 31, 2011

I'm using "My.Computer.FileSystem.CopyDirectory(...)" to copy large directories (30-50gb) from one mapped share folder to another. Using "FileInfo.length" to add up all file and subfolder sizes, determines the 'origin directory' size just fine. However, if I use the same method for determining the size of the 'destination directory', mid copy, it returns the full file size, despite the copy not yet being complete.I'm at a loss as to why, as this method works fine in testing, going from a local PC t

Private Function FolderSize(ByVal dir As String) As Long
Dim Size As Long = 0
Dim d As New DirectoryInfo(dir)

[code].....

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I'm using a background worker to read a XML file and do stuff in a database i get nothing in debugger but when i run it i get this error... how can i find out where and what is wrong? Exception has been thrown by the target of an invocation.

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Sub LoadData()
Dim connetionString As String
Dim cnn As SQLiteConnection

[Code].....

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Don't know how to copy images to resources file on VB and create background change button. I am trying to add my graphics folder to the resources folder in my project but I get some kind of error. That's the easy question. Now, I have a panel container in which I want to show an image that will be change about 5 times when I click on my background change button. What codes do I need to use for this?

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How do you recommend I copy large files over the LAN (>20GB)Currently I am using File.Copy.Another question I have is how can I implement this class to be self contained, meaning that it would report progress to the object that called it? or do I have to define a delegate in the calling object?

Code:
Public Class cCopier
Private Delegate Function CopyProgressRoutine(ByVal totalFileSize As Int64, ByVal totalBytesTransferred As Int64, ByVal streamSize As Int64, ByVal streamBytesTransferred As Int64, ByVal dwStreamNumber As Int32, ByVal dwCallbackReason As Int32, ByVal hSourceFile As Int32, ByVal hDestinationFile As Int32, ByVal lpData As Int32) As Int32

[code].....

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Using A Background Worker?

Jul 15, 2011

I'm writing an application in Visual Basic Express 2008, part of the function being to walk through a folder structure starting from a user specified folder. In my research, I found this thing called a background worker which seemed an appropriate tool to use given the potential size of a target folder structure. I successfully installed the two examples from the library here, and believe I understand the principles involved. Even so, having tried to build this feature into my application, it seems as though it is not working as expected, and, as predicted, debugging a multi-threaded application is a pain in the extremity.

I have this fragment under my "start" button click event -

HomeSource.Enabled = False
HomeCopy.Enabled = False
HomeReport.Enabled = False

[Code].....

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What Is A Background Worker

Jul 18, 2010

im thinking just because an app has been sent ton system tray does not mean its a "back ground worker"

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my backgroundworker as I just cant get it to work. Basically I have a backgroundworker which does a few tasks but I'm trying to implement a progress bar and a label. I'm going to set the maximum value of the progress bar to 10 and then have it updating as I move with each task, also I'm thinking of a label with the progress bar which will display the progress ie

[Code]...

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I'am trying to make app that will show every file in C:[code]Now how can i add progress bar with the background worker.

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For 4
BacgroundWorker1.RunWorkerAsync(fileName(i))
Next

[code].....

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Apr 27, 2010

I have created a background worker to go and run a pretty long task that includes creating more threads which will read from a file of urls and crawl each. I tried following it through debugging and found that the background process ends prematurely for no apparent reason.

While Not myreader.EndOfData
Try
currentRow = myreader.ReadFields()
Dim currentField As String

[code]....

This first bit of code is the loop to input from file and this is what the background worker does. The next bit of code is where the background worker creates threads to work all the 'landingPages'. After about 10 threads are created the background worker exits this sub and skips the file input loop and exits the program.

Try
For Each landingPage As String In landingPages
pgbar.Timer1.Stop()
If VisitedPages.Contains(landingPage) Then

[code]....

Also my main thread runs a forms from where this background is called to run but the main thread is supposed to wait for the background process to end unless the user selects another option from the main form.

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i m trying to kill a background worker in the do work event of the worker i was using

backgroundworker.CancleAsync()

but its shows an error saying tat CancellationPending does not allow

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How To Know If Background Worker Is Already Cancelled

Dec 30, 2011

currently, i have this code: My_BgWorkerB is the Name of my BackGround Worker

If My_BgWorkerB.IsBusy Then
If My_BgWorkerB.WorkerSupportsCancellation Then
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[code].....

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I have a backgroundworker which does a few tasks but I'm trying to implement a progress bar and a label. I'm going to set the maximum value of the progress bar to 10 and then have it updating as I move with each task, also I'm thinking of a label with the progress bar which will display the progress ie [code]

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I have a function it is called ReLoad()

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I am developing a VB application along with MS Access... When I initially load my form I need to put my application to sleep for 3 seconds or else data wont load properly. So for this 3 seconds I would like to show a progress bar displaying a message "Please wait" I tried using background worker but did not find any success... I have gone through many tutorials but for some reason could not accomplish the task.

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I'm new for VB.Net 2008. I am facing some problem about how to make the multiple groups activities running (it might concurrent) based on their own activity's time set? For example: If there is 80 groups and 100++ activities in each group, can i use background worker (create 80 background worker?) to handle this (each background worker handle their group activities.) if in this case (But it will running lag or hang)

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