I have to write a program that retrieve record from database, but everytime the screen will look like getting hang when getting large row record.I using the backgroundworker to prevent screen hang when retrieving record from database but why my progress not working when in progress? It only will show when the transaction done..
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I am trying to use the background worker to keep my application responsive during the calculations it does. All I need is one to calculate and the other to count time which I use a timer for. But when I try to use a progress bar as well as I want to see the progress it gives me an InvalidOperationException: Cross-thread operation not valid: Control 'ProgressBar1' accessed from a thread other than the thread it was created on. I need this to work, how could I use a component from outside the background worker? This is the background worker bit:
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I've got a form that has a ProgressBar on it. The Style is set to Marquee. In the Form.Shown event handler, I call BackgroundWorker. RunWorkerAsync(). In the old version, while this is occurring in the background, the ProgressBar is scrolling, which is exactly what I want.I copied over not only the code from within the file (i.e., the logic code) but also the code from the designer file. So, from what I can tell, there should be NOTHING different between the two files. However, in the new version, the marquee scroll doesn't occur.
View 6 RepliesI just have 1 listbox which got link in there. How can I download each file using background_worker + progressbar(current file download)?
View 5 Replieshow to load data into datagridview using backgroundworker & progressbar?Let's say i have a report that shows some statistics, or has 100 000 of rows that should be displayed and during the load i would like to show the data that is already loaded and not to frees the form.Same example like in SQL when you perform a select command from a table which has 100 000 of rows and while loading the data, the grid is already filled up and progressbar is shown at the left buttom side.
View 7 RepliesI have the download progress bar working in my program but I can't find any working code to determine the amount uploaded. here is my upload code
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I have a progressbar on my form that is not getting updated.
When the Send Email button is clicked I do this:
Public Sub SendMail()
If CheckSettings() = False Then Exit Sub
BackUpEbillFile()
LockForm(True)
StatusBars(1, "Sending emails...")
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[Code] This is run from inside a backgroundworker. It throws an error, Cross-thread operation not valid: Control 'pbUpload' accessed from a thread other than the thread it was created on. I have read and read and searched and basically come to the conclusion I am going to have to invoke the command but this is new area for me.
View 5 RepliesI'm using Windows XP and VB.net 2005. I've search for information on how to use the BackgroundWorker to display a ProgressBar during a process and thought I had it correct, but appearently I don't - the bar never shows, much less moves. My goal is to have a Marquee Style progress bar display while my code is looping thru a query result populating a datatable that a DataGridView is binded. Here is my code.
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I have a class that downloads a specific file from the net.This class uses a BackgroundWorker. I tried to implement kleinma's Download Files From Web With Progressbar [URL]../showthread.php?t=396260), but I'm having difficulties making it work. I'm including a test project, so if someone is willing to take a look at it, it would be great .
The part I'm having trouble with is updating the progressbar and progress label. The errormessage I receive is in Norwegian, but it has something to do with threads. I suppose I should use Invoke or something, but I don't know where to start..
how to safely load a datagridview via a backgroundworker while showing progressbar feedback ? My data is coming from an access mdb.
View 4 RepliesI place some code below to simplify the process.
1) I am trying to use background worker to download a large file and update a progress bar to reflect the changes as the large 5GB file is being downloaded, and also update percentage completed to the label.text(lblInfo).
2) As I was goggling I came across some info that a web client is needed to calculate the maximum size of the file and divide by 100 and you can stream it down with the web client. Reading it is one thing, implementing it is another as I spent week trying to get it to work.
UCPocoAPoco
Imports System
Imports System.IO
Imports System.Diagnostics
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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.
in vb 2008 or higher :how do i make the progressbar look like the progressbar in xp when i use win7?
View 3 RepliesI'm doing a job in background (another thread) and do not know its progress, so I can't put values in progress bar. I'm looking for a progressbar that is just 'walking' from left to right and vice versa, until the job is finished (Microsoft uses it sometimes). Where can I find that progress bar?
View 2 RepliesIs it possible to add a progressbar to a splash screen, that automatically updates until the application is loaded?
View 9 RepliesI have a form with an Adobe PDF reader control.I point to a specific PDF I want to load when a button is clicked. The PDF is 28 Megs big and takes some time to load into the reader.I would like a progress bar to to show (like a showdialog kind of thing) so the user does not click all over the place and thinks the app is static.I have searched and read all about the progressbar and there are many articles dealing with downloading and moving files around but nothing in terms of file loading and how to get a progressbar to reflect the status of the file being loaded.[code]
How would I update the progressbar1 control to reflect the time it takes to load? I checked the AxAcroPDFLib Namespace and found no "progresschange" type of functions or events.Can some one please help a new guy out? I am fairly new to vb.net so please be as specific as possible.
[code] How come the ProgressBar's value stays the same?
View 1 RepliesI have a listbox in what I receive computer names from network, and I want to have a progress bar thet loads until the last computer is in the list. How do i do that
PS: i don't know how many computers are...some times there are 100 some times there are 150, and sometimes there are 48.
I was wander if anyone can help me with this one:
Dim p As New Process
p.StartInfo.FileName = ("getmac")
p.StartInfo.Arguments = " /S " & TextBox1.Text & " /U domainadministrator /P password"
p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
p.StartInfo.UseShellExecute = False
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Need to show an user a progressbar about the progress. Problem is i dont know where to start.
I got a progressbar in my game (Hpbar) and a lots of time the value go under the Minimum Value and it crash... Any way to make it go back to minimum value 0
View 6 RepliesI made a game and i made a hp bar.So i made a Heal button but when the value is more then the Maximum value it crash.Any way to fix that? Like something to bypass that go go back to the Maximum Value?
View 7 RepliesI am making a CSV/TXT file splitter. Upon selecting the file in openfile dialog, I have a function to count the number of lines in the file. I would LOVE to have a progress bar alongside it. Problem is, the maximum value (i.e number of lines in text file) will obviously be varied in different files. Anyway, I could I a progress bar for such a task?
View 4 RepliesPerhaps this is nothing weird, but it is in my eyes. After loading the webpage I want to hide the progressbar on my ParentPage, but it keeps coming back. Here's an example of my
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How to do this = =?
View 9 RepliesI made timer to check this code below each second.
If ProgressBar1.Value = ProgressBar1.Maximum = True Then
BackgroundWorker1.RunWorkerAsync()
ProgressBar1.Value = 0
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But it freezes whole program.
i have me a database (.sdf) which loads its records into a listview. One of the database, due its size, takes some time before everything is loaded. I'm using cursor.wait atm, but it I guess there's a more professional approach.
How do I show a progressbar while loading the data?
Here's a small piece of the code I use to load the data:
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I want a progressbar to tell me when my application is done loading, so I have tons of lines of code and the program is complete and it runs threw WMI, etc., etc., how do I get the progressbar to equal the value of completion my whole programs process has done?
View 2 RepliesI was messing around with the listview Control first,, And when i got it working i thought what's this backgroundworker thing,,so i read up on what info MS had on the MSDN page..and slapped it in here..and i thought i had it working ok until i tried to move my project application to the side to reply to a instant message i got..and then i noticed that it froze up .and looked like it was using alot of system resources,But wait let me back up just a bit.originally i was trying it with a fairly small number of items, and then i seen on here where someone had posted a rather large index for testing his app with,,and while trying to load that list that's when the issue was noticed i don't really plan on loading a list as big as that test index was but, I would still like to know why the program did what it did using the code below.I'm not really asking for it to be too altered, i kinda like all the controls i have in it the moment,, and the way it loaded as well.
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I am getting a list of computer on my network. I want to run this code in the background but I keep getting an error. How do I delegate the TreeView.Error :The action being performed on this control is being called from the wrong thread
Dim rip As Integer
For rip = 1 To 254
Application.DoEvents()
If My.Computer.Network.Ping(IPArray(0) & "." & IPArray(1) & "." & IPArray(2) & "." & rip, 60) Then
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