How to make backgroundworker work on the login module??My form have progressbar with Marquee style...
Private Sub btnLogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLogin.Click
lblProgress.Visible = True
[code].....
I have an VB.net Login Module and what I want to do in this module is to know whether the account being logged in is being used or it's online
Ex: If I logged in then it will say "User is already logged in" etc etc...
how can i use BackgroundWorker in a module
View 9 RepliesMy BackgroundWorker works perfectly in my main form frmMain. But when I run the ReportProgress method in another module, I get exception "This BackgroundWorker states that it doesn't report progress. Modify WorkerReportsProgress to state that it does report progress." This IS set to report progress; this works fine when run the same way in the main module.Basically, from a module called by my BackgroundWorker, I want to show progress on my main form.How can I fix this? The only idea I have is to move the code from the module into my main form, but this seems a backward step, which would involve extra work. Am hoping there are easier ways!
Calling code in class frmMain:
Friend WithEvents BackgroundWorker As New System.ComponentModel.BackgroundWorker
Private Sub btnTest_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnTest.Click
' Specify that we do NOT want the background operation to allow cancellation
[code]....
Code which generates the exception in separate module Invoices:
Public Function MyTest() As Boolean
frmMain.BackgroundWorker.ReportProgress(0)
End Function
Am using VB.NET in VS 2010, with .NET 3.5.
I'm working with DNN (DotNetNuke) and I have to change the default login module. This module it's vertical by default, by don't know how to set it horizontal. Already tryied to find the sources of this module but all I found were some Local Resources Files and some VB files.
View 1 RepliesI'am trying to make a login system with the dll. I want the .dll file to have the password inside of it and make another interface window that the user can login in.
View 10 RepliesFor the past couple of days I have been using Visual basic 2008 and learning it.Anyway, I am trying to make a login form that will login to a website with WebBrowser control.and I am noticing that the webbrowser is extremly slow, it takes him about 20 seconds to load a page while mozilla opens it in a moment, why is that?
View 6 Repliesin 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.
I got the above error when i deploy my web application into windows server 2003. How do i resolve it? [code]
View 3 RepliesI had a problem with WebBrowser component. Basically, it works improperly when try to log in on one web-site (Forex Trading Social Network | Online Forex Trading Forum and Social Networking Site). I am working with Visual Studio 2010 Professional. I created a simple WebBrowser trying to access the indicated web-site. The problem begins. Well, the website loads, but when you go to the login page (Forex Trading Social Network | Online Forex Trading Forum and Social Networking Site) and try to log in, it doesn't work. I mean, when I enter the login details the login page just refreshes itself and the login wasn't proceed. The same login page appear with every login attempt. The is the current problem!I check with Google, it works. But, it doesn't work with Forex Trading Social Network | Online Forex Trading Forum and Social Networking Site! Why?
View 14 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.
[code]...
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
[code]....
I'm trying to do some calculations with the backgroundworker and display a window with a loading animation on it. The calculation is working but the loading animation isnt moving.MeasurePolygons is the Sub that does the calculations and updates the variables to hold the values of the calculations which works fine. Its just the loading screen. It pops up as it should but just doesnt animate
Private Sub ClickEvent()
BackgroundWorker1.RunWorkerAsync()
If Window1.frmLoading Is Nothing Then
[code].....
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..
[Code]...
I have some classes right now that I have that I reuse for Client/Server programming. I'm using Thread in these classes though for monitoring for things being written to the network streams and stuff like that. I'm just not sure if I should be using the background worker class instead. I'm also using TCPClient and Listener classes, should I be using sockets directly? I guess it would all depend on the flexibility I would need in a given application's specs.
[Code]...
I am having trouble with getting a delegate to work properly.Here's my
[Code]...
i list all sub-directories in backgroundworker :
Private Sub BackgroundWorker1_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
If My.Computer.FileSystem.DirectoryExists(My.Settings.path) = True Then
[code].....
I am trying to run a database query in a BGW to fill a DataGridView with the data that is returned by the query. The code I came up with works in that it executes the query & fills the DGV but it totally freezes the form & all controls on the form. Successive clicking on the form or any controls causes "Not Responding" to show in the title bar & I have to terminate the program from the IDE. If I run the query in a regular subroutine it works fine. Can somebody please review my code to see where I might be going astray? I've never used a BGW before so maybe I'm doing it all wrong.
[Code]...
I don't have muc experience with backgroundworkers, but this is basicalmly what I want it to do:
- Copy files from a list
- Add Succes/Fail to a listview
- Report Progress
Private Sub BackgroundWorker2_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker2.DoWork
'2 groups
Dim Succes As New ListViewGroup("Succes")
[code]....
It doesn't copy the files, nor does it report progress.
I'm running some tasks on a BackgroundWorker thread and needed to display the current tasks in a label.Before adding the label, the tasks were completing just fine and the UI was responsive.Once I added the labels, the UI has become unresponsive. The issue, I believe, is the Invoke property.I've declared all my tasks, including the updating, in a sub and am getting the Invoke property of the label each time, in order to set the information.The following is an example of what I'm doing:
VB.NET
Private Sub Test()If lblTask.InvokeRequired = True Then Dim mi As New MethodInvoker(AddressOf Test) lblTask.Invoke(mi)
[code]....
Ive read through tons of forums, but my Backgroundworker1.CancelAsync still isn't working.I have Form1 that shows Form3(see code).when btn_submit is clicked on Form3 it runs the backgroundworker, copies a file from one place to another, and shows the progress in the progressbar.Form3 contains: lbl_message, btn_submit, btn_cancel, ProgressBar1, BackgroundWorker1 (with Workersupportcancelation = true.)When i click on the btn_cancel the copy continues, so i assume the backgroundworker has not stopped.[code]
View 2 RepliesOf course, it's nice enough to unfreeze itself when the task is completed. I have must at looked at this code for 2 hours, and still can't find the bug.
Imports System.Threading
Public Class Form1
Dim PathAmount As Integer = 0
[code]......
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:
[Code]....
I am trying to make a graphics program with mousewheel-controlled zooming using GDI+. My plan is to provide rapid feedback, such as a low resolution render or even just a bounding rectangle, followed by a full resolution render as soon as possible afterwards. It seems logical to me to try a BackgroundWorker for the latter task. This is my first attempt to use one of these, or any other way of multithreading for that matter. Mousewheel events can follow one another much more quickly than I can render to the screen. That means I need to kill any rendering process that is already running and start a new one with the latest value of the zoom scaling factor.[code]The above class coexists with a DrawingSurface class, a UserControl which listens for the ProvideFeedback and ScaledImageReady events and paints the image accordingly. It also raises mouse/keyboard events for the zoom and other tools to deal with. My problem arises in the DO loop waiting for Cancellation to finish. The zooming routine works for one or maybe half a dozen renders, depending on the image size, but then it hangs in that loop and never comes out.
View 2 RepliesI have created a application that creates a windows schedule task that connects to a FTP server and uploads/synchronize selected files and folders from your computer. After the user has selected all needed information and click continue, a form with a progressbar (Marquee) should appear. The application will then perform different tasks needed for the schedule to be completed. When all needed tasks are finished i want the progressForm to close and the main form will show you a summary of the newly created task.
I run the tasks in the main thread and assign a backgroundworker for the porgressFrom. i have have also tried to run the taks in a backgroundworker.
Button Continue Click Event.
Private Sub btn_Continue_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Continue.Click
Try
[Code]....
how we can declare a connectionstring in a module and call that module
View 1 RepliesCan a BackgroundWorker call additional subs? In my program I am connectiong to an OPC Server. I am doing some AsynReads, which in themselves don't take anytime. But Once I get the AsyncReadComplete returned, I want to do the AsyncRead right away. Basically I need to Loop them. The problem now is that while it is doing this, Everything is unresponsive, because it is just going through the loop. So to perhaps rephrase the question, If the BackgroundWorker initiates a process (in this case AsyncRed) would the returned AsyncReadComplete be apart of the BackgroundWorker or seperate Thread?
View 7 RepliesI'm trying to add information to a ListView from a BackgroundWorker thread. I thought I could do this in this manner:
vb.net
Private Delegate Sub _ListView(ByVal lvi As ListViewItem)
Public Sub test(ByVal lvi As ListViewItem)
[Code].....
When I attempt to run the "test" sub the BackgroundWorker, I get an error:
Argument not specified for parameter 'lvi' of 'Public Syb test(lvi as System.Windows.Forms.ListViewItem)'.
Is there something I need to specify when declaring the sub, or in the sub itself?
I am using a background worker's work method to create a new form and show it.
But it throws this error
System.Threading.ThreadStateException was unhandled by user code
Message="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."
[Code]....
So, my code for testing is quite simple...
Public Class sandbox
Dim hits As Integer = 0
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
BackgroundWorker1.RunWorkerAsync()
End Sub
[Code]...
from the button1 click..if i run the: test...it works fine.but if i call it from a backgroundworker..it doesnt do anything.I'm going to assume this is a limitation of the backgroundworker...is there a workaround?
