Displaying Progress Of A File Stream Being Consumed By Another Process?
Feb 16, 2010
I've asked this before, or something similar, but can't find it so I don't know what the answer, if any, was.
[Code]...
Now it seems to work fine, but I'm working with very large files (70+ GB) across a network (local copy is not an option) and while the function is executing if the user moves the application the screen can go blank and they can panic. What I want is a way to update something like a progress bar to give feedback to the user.
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Feb 12, 2010
I have the following function
Private Function GetMD5(ByVal file As String) As String
Dim md5 As MD5CryptoServiceProvider = New MD5CryptoServiceProvider
Dim f As FileStream = New FileStream(file, FileMode.Open, FileAccess.Read, FileShare.Read, 8192)
md5.ComputeHash(f)
[code]....
It works fine, but when working with very large files on the network my users sometimes panic.I'd like to add a progress bar that updates based on the progress of the hashing through the file.So, my choice are either to manually create the hashing process, which I believe will be much slower,or somehow tap in to the position value of the filestream and use that to update a progress bar.I'd be happy to tap into the events of the MD5CryptoServiceProvider if I could, but I don't see anything there.I have searched the net to try to find an example and have only found code that works by reading line by line from the filestream, not from it being passed to another control/service.
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Aug 11, 2009
Here's my
[Code]...
During the file copy, Label2 isn't being updated. In fact, my whole form goes non-responsive. How can I fix this?
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May 24, 2012
I am using a Data Grid View to display data that come in from a tcp stream. When the stream receives data, the data is parsed and placed at the top of the grid. These are my top 3 lines of the cell clicked event of the Data Grid View.
Code:
If SpotsGrid.CurrentRow.Index = Nothing Then Exit Sub
i = SpotsGrid.CurrentRow.Index
tempFreq = CStr(SpotsGrid.Item(1, i).Value)
I placed the top line there to prevent errors when a user clicks on a blank grid before any data has been placed in the grid and to stop selecting anything if a user clicks on a column header. But my problem is as data is added to the to the top line that line of data is not click-able because the index=0 or Nothing. So my question is what would be the best way to code this so it is protected from the user clicking on a blank grid and the column headers but still allow the user to click on the first line of data?
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Apr 4, 2010
Is it possible to start a process by passing a stream instead of passing a FilePath?
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Jan 25, 2011
I am using the following code located here to upload files
Public Function UploadFile(ByVal oFile As FileInfo) As Boolean
Dim ftpRequest As FtpWebRequest
Dim ftpResponse As FtpWebResponse
[Code]....
I would like to extend it, so i can have an upload progress too. The problem is that i do not know from where to start. What is the "logic" of displaying the upload progress?
"Split the file" in predefined parts and upload them or what?
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Oct 22, 2009
I don't know VB very well, but I need to create a wrapper program for any executable that logs the arguments, all input, output and err information:
My wrapper is called: e.g. someApp.exe arg1 arg2
Logs to someApp.log: arg1 arg2
Calls original executable: _someApp.exe arg1 arg2
Must log and forward any console input to _someApp process inputstream
Must log any output and error stream from _someApp process
I'm stuck at point 4 now:
Dim p As New ProcessStartInfo
p.FileName = execute
p.Arguments = Command()
p.UseShellExecute = False
p.CreateNoWindow =
[Code] .....
After _someApp ends I am able to read out and err stream to log it, but I still need to provide my own wrappers input to the process and I want to read out and err stream as it happens.
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Dec 2, 2009
I have a WinForms app and am trying to add the ability to start up multiple operations based on data entered in a datagridview. The operations must be run synchronously to monitor that they complete succesfully before inserting a row into the DB to indicate that the operation was succesfull. I also have a status event handler on the operation which will return the percentage of the running operation.
So far I am using threads to kick off the operations, however it is updating the progress of just one of the threads. When that thread is complete it is moving on the the next and will work that until completion. I would like them both or more to run simultaneously and be able to report the status of each.
I am basically looping through the rows in the grid and using the values there to instantiate a new class I created. I am then creating a thread and kicking off a sub to perform the operation from the new object. I think I may be close as I know they are all being started, but they are just running one after the other rather than all at once.
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Feb 3, 2009
Got a bit of a weird problem with a progress bar. I'm using a backgroundworker, which calls a "Process" function in a different class. The function goes about its business, and sends an update back to the form displaying the progress bar. What I'm finding is that its doing everything right, except update the progress and a label on the form. I've put breakpoints in to check the values of variables being sent to the form, and they're correct. I've also checked the value/maximum of the progress bar during the same break as I step through, and they're being set correctly.
they're just not displaying their updated status. I've tried refresh and application.doevents, to no avail. When the backgroundworker is complete, the values of the progress bar/label are as if I've never touched them! When the worker is complete, the Close button is enabled, so I know its finished. Anybody got any pointers/thoughts on this because I've been battling with this for a day and a half so far. I'm using the same technique as I've used elsewhere in the app to do similar backgroundworker progress updates, but this one refuses to work properly.
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Nov 28, 2011
[Code]...
Above is the response of the page I am trying to get if I enter the URL: However, the program just crashes with the following code (i.e. never even displays final - meaning stream is still going on) I think that it is streaming the video, in addition to the source- which I do not want to happen How can I retrieve this source?
[Code]...
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Jun 28, 2011
how i can use progress bar and updated with progress time. i mean for example if i make some process by click button ( copy file or search or) process that take alot of time, i want to see the progress bar change depend in the process. i know how to use it with a timer, this i don't wanted, because i don't know the time require for process event.
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Mar 19, 2010
I copied the code here and translate the code to vb [URL]it is working fine but there is one small problem but I cannot solve? Here is my code: SyncClientVB Another Source The scenario is... the progress is reported by an event (OnCopyingFile event)
Public Sub OnCopyingFile(ByVal sender As Object, ByVal e As CopyingFileEventArgs)
If pbFileTransfer.Value <> e.PercentCopied Then
If txtCurrentFile.Text <> e.FilePath Then
txtCurrentFile.Text = e.FilePath
[code]....
The problem is that it is ok when runned but when I click the form it starts to hang but in the console... it is still continuing.
dp.SyntaxHighlighter.ClipboardSwf = '/dp.SyntaxHighlighter/Scripts/clipboard.swf'
dp.SyntaxHighlighter.HighlightAll('6f5d1b01659646618ff3bdca29fb1b7f')
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Jan 17, 2012
Looked through many tuts, can't find one.
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Aug 5, 2011
Iam using this code to browes sites AxWebBrowser1.Navigate( Me.TextBox1.Text) no how to make a progress bar run till my browser process of searching end ?
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Feb 26, 2011
Bit of a Noobie question here, I have a process, for example[code]...
I need to launch the process from within code in a form or module and I want to monitor its progress, for example with a progress bar.
The problem I have is that in order to use a 'progress form' I have to show a form modally, then kick off the process (usually with a button) and allow a cancel option.
I want the form to show then start running automatically without user intervention.
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Mar 10, 2012
how can i track my process:
Dim psi As New ProcessStartInfo("cmd.exe", "/c attrib -h -r -s /s /d " & ComboBox1.Text & ":*.*")
p.StartInfo = psi
p.Start()
[code].....
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Jul 2, 2009
hat i am trying to accomplish is execute a dos command with the following
frmStatusBar.Show()
' Set start information.
Dim start_info As New ProcessStartInfo(sOutput)
[code].....
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Oct 15, 2011
I would just like to know if there is a way to integrate a progressbar that shows the progress of the process? I mean when process.Start is activated, that's when the progressbar starts to load until and stops only when process.HasExited.
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Aug 8, 2011
I made an app that have button and Textbox1 and Textbox2
when I write a word in Textbox1 it anylise it in Textbox2
but this process take some time
here I want to make a progress bar run till my process end ?
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Mar 7, 2009
I need progress bar, I want it to load when i am loading a webpage (I am making a browser). I am using TabControl.
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Sep 10, 2009
I have created a listbox with several items that when a button is clicked, it opens up the application that uses that file and then starts the file. this all works fine, but I wanted to know if there is a way to show a marquee-type progress bar for each process as it's being opened?
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If CheckedListBox1.SelectedItem = "ITEM ONE" Then
Process.Start("c:\DIRECTORY\ITEMONE.exe")
End If
[code].....
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May 11, 2009
I have a form that I will be using to copy directories of photos from memory cards to locations on a computer. I would like to add a progress bar to the application to show the progress of the copying in real time. This is the code that I use to copy the directory in the first place
Dim SourceDir As String = SourceTextBox.Text
Dim DestinationDir As String = DestinationTextbox.Text
If System.IO.Directory.Exists(DestinationDir) Then
My.Computer.FileSystem.CopyDirectory(SourceDir, DestinationDir,)
Else
My.Computer.FileSystem.CreateDirectory(Destination Dir)
My.Computer.FileSystem.CopyDirectory(SourceDir, DestinationDir)
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May 12, 2010
I need to provide a DLL that is consumed by a VBA app (Access 2003, late binding) and returns stuff that is retrieved from various WebServices. These WebServices publish methods that not only return a single object, but also arrays of them.
From the Access-app's point of view, it's no problem to consume i.e. an array of strings. However, there's also methods that return an array of a (proprietary) class. I can't seem to be able to consume such an array from VBA.[code]....
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Nov 8, 2011
We had plan to create a three tiered architecture database application, where the middle tier will be implemented using Web Service. We're going to use Linux for the server, so I think for the web service to be able to be implemented, we only had PHP/Java left. Is this right?
The constraint is, we're going to use VB.NET for the client application.We already had a two tiered VB.NET application from our last successfull database application. It use a lot of DataSet for the result of SQL execution. Now, what I had in mind, is a simple approach of converting all procedure that return a DataSet Object, to be a WebService method. But, because of this thinking, I don't think we can do it in Java/PHP. That is, we'll be enforce to use a ASP.NET approach. Is this correct? I assume my answer from this article Consuming a DataSet from an XML Web Service (ADO.NET)
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Sep 21, 2007
When I load my solution and compile it after first starting the IDE, everything works as expected. After changing source and recompiling, I get the following compile error:
Error 11 Unable to copy file "objDebugCAMDRS.Library.dll" to "binCAMDRS.Library.dll". The process cannot access the file 'binCAMDRS.Library.dll' because it is being used by another process. CAMDRS.Library.
After closing Visual Studio 2005 and reopening the solution I can compile again successfully. This is an old solution that has been fine for a long time. I just recently changed computers and reinstalled everything.I am running win XP Pro sp2, Visual Studio 2005 sp1.
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Feb 1, 2012
My program writes to a .txt file (and this is the ONLY program that writes to it) in a thread (with lowest priority), but every now and then it gets an error "The process cannot access the file because another process has locked a portion of the file" when it executes this code: swLog.WriteLine(sPacket).Other program reads from the file, not write to it, why do I get this error, and how can I get around it, or what shall I do when I get this error since I can't write to the file ?
Class
clsFile
Private swLogOrig As StreamWriter
[code].....
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Apr 2, 2010
I have a progress bar on a Windows Form which displays the number of records as they are retrieved from the database.The problem I'm having is that the entire Form.Load() method seems to run prior to the form being displayed, which means all my code updating the progress bar is gone to waste.
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Sep 1, 2009
I am getting an error with this code.
The process cannot access the file 'C:UsersdavidDesktopTest Folderdavid 2.xml' because it is being used by another process.
how do i end the prosess after I create the file? Or am I creating it in the wrong manner.The underlined line is where the error ocures.
Public Sub AddDTData(ByVal value1 As String, ByVal value2 As String, ByVal filename As String)
dtUser.Rows.Add(value1, value2, Now.Date)
If My.Computer.FileSystem.FileExists(filename) Then
[code]....
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May 25, 2012
in an winForm app in VS2010 win 7 compiling to x86, I try to do what Alvas.Audio seems to work. See (c# ex: [URL] for reference.
Dim data() As Byte = wr.ReadData(second * i, second)
The result give me data.length()=0. I do not have any exception, I can read format from it and whatever reader I use I got this problem.EDIT : After some tests, it seems like the uncompressed file I create in the first step (in PCM format, with .wav extension) can not be recognized by the Alvas.audio library for the second step. I must miss something around Audio file markups or something alike.
Here is the code that might be the source (basically this is step 1):
Dim functOut As String = String.Empty
Dim wr As Alvas.Audio.IAudioReader = Nothing
Dim fs As IO.FileStream = Nothing
[code]....
How can I write the resulted stream to be sure I can read it again later?
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Sep 13, 2011
I try to open a text file and write in some text, when i run the program it says the following error:The process cannot access the file 'D:VB projectsCategory_Characteristics.txt' because it is being used by another process.
THe code is as follows and the error hits in line :
Dim objWriter As New System.IO.StreamWriter(FILE_NAME)
-----------------------------------------
Dim FILE_NAME As String = "D:VB projectsCategory_Characteristics.txt"
[code]....
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