Download A File Using A Backgroundworker?
Jun 8, 2009I am trying to download a file using a backgroundworker with this code :
My.Computer.Network.DownloadFile("valid URL", "Destination file")
ADVERTISEMENT
Download File: Percentage & App Freeze (BackgroundWorker & ReportProgress)?
Sep 19, 2009Public Function DownloadFile(ByVal URL As String) As Boolean If Not URL = "" Then Dim wc As New System.Net.WebClient() Dim Filename As String = Mid(URL, InStrRev(URL, "/") + 1, Len(URL)) wc.DownloadFile(URL, "C:TESTS" + Filename) Return True End If Return False End Function
I am using that function to download a file. It works. But there are two problems:1# While its downloading the file, the app is sort of frozen like its in a infinite loop.2# How do I get the download percentage?
edit: My resolution to freezing using BackgroundWorker (thread) and using ReportProgress to update the GUI is here: [URL]...
VS 2010 Backgroundworker And Kleinmas's Download With Progressbar?
Oct 14, 2009I 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..
Download File From Http Server That Requires A Referral Before Allowing Download?
Nov 18, 2011I usually download file using following code:My.Computer.Network.DownloadFile("url of the file","filepath to save the file")But recently I encountered a site that only allow file download if you click it from its site and not via direct downloading from vb.net code.How to download file from http server that requires a referral before allowing the download?
View 1 RepliesAsynchronous File Download And Synchronous File Download?
Apr 13, 2011What is the meaning of asynchronous file download and synchronous file download ?
I came to them while using system.net.webclient class
I know a basic meaning of tcp/ip and http .
Download Multiple File + Progressbar But Cant Download File
Nov 10, 2011i try to download multiple file + progressbar.. but its seems nothing happened and the file is not download.. my program just function like.. when the file was error.. it will download the latest file from webhost..
[code]...
Using A WebClient To Download A File, But Being Able To Get The Download Information?
Oct 23, 2009Imports System.Net
Public Class DownloadStuff
Dim downloader As New WebClient()
[code].....
Cancel Backgroundworker - Got The Error Message" This BackgroundWorker Is Currently Busy And Cannot Run Multiple Tasks Concurrently?
Dec 14, 2009in 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.
Download A File With A Download Timeout?
Feb 4, 2010I want to download thousands of files from the web and save them locally. What is the most efficient way? It is important the failures timeout within 10 seconds.
Is there a better way to stream one stream into another? Maybe a smaller buffer, like 1024 bytes at a time, is more efficient for large files?
Dim w_req As System.Net.HttpWebRequest = CType(System.Net.HttpWebRequest.Create("http://blah.blah.blah/blah.html"), System.Net.HttpWebRequest)
[Code]....
IDE :: "File Download" Dialog / Way To Perform Download Operation At Back-end
Jun 15, 2010I have created a application in vb.net. I am using Web Browser control in it.With this Web Browser control I open an URL and tries to Download something, it will populates an dialog for "File Download" to Open/Save/Cancel for the file..I am downloading the .ZIP file, and it will not show the checkbox for Automatically Do.Is there any way to perform the Download operation at the backend, means it will not ask me for such options.
View 2 RepliesVS 2008 - .txt File - Write The File Path So That Someone Else Can Download My Program And File And Read The File
Feb 27, 2012Reading a .txt file in VB.net. My file path is C:UsersMyLilMulePepeDocumentsVisual Studio 2008Projectscurtain_calls.txt.
This is my line of Dim LoanOptionsFile As String = "C:UsersMyLilMulePepeDocumentsVisual Studio 2008Projectscurtain_calls.txt"
I can read the file when I run the program, but how do I write the file path so that someone else can download my program and file and read the file on their system?
Com Component Only When Run Via BackgroundWorker Or Batch File
Feb 25, 2010My code is calling a COM component to retrieve data from a contact management product. That code works fine when called directly from my VB code. However, if I add a Progress dialog and run the SAME code via the BackgroundWorker, the COM component does not run. It generates an error: Object does not match target type. when attempting to access items from the COM component.
Also, if I run my application via a batch file that simply calls the application, the COM component does not run. In this case, it generates an exception as soon as the COM component is accessed in the code. I have posted questions to the COM component vendor but after several days have not gotten any responses. Someone told me I could not access COM objects on a thead, but the same BackgroundWorker code works when communicating with Outlook or Lotus Notes (which I believe are both COM).
[Code]...
BackgroundWorker Progress On Large File Copy?
May 23, 2011I have created a simple Backgroundworker process to copy a large file (30GB). Is there any way to report the progress of that file copy?
I'm using System.IO.File.Copy to perform the copy. I've seen a few posts/blogs that suggest comparing the bytes copied with the size of the source file but that seems like a huge overhead in this case.
Use Of Backgroundworker While Open A Large Text File?
Apr 3, 2010How to Use of Backgroundworker while open a large text file
View 3 RepliesSystem.IO.File.ReadAllBytes Work Inside A Backgroundworker?
May 24, 2009i want to use the following function
Dim
buffer() As Byte = System.IO.File.ReadAllBytes( ImageSourcePath)
inside a backgroundworker but it does not retunr any byte at all while if this is places outside the backgroundowrker it works files.
BackgroundWorker To Update Progressbar And Label While Downloading Large File
Mar 10, 2012I 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
[code]....
Download File Read HttpResponse Content-Disposition File Name Encode?
Dec 16, 2010I cannot read filename in response header:Content-Disposition: inline; filename="
View 6 RepliesUse The WebBrowserControl To Download A Program Generated PDF File Without The File Save As Dialog
Sep 15, 2011I am writing a Windows Form program to automatically download and store generated PDF reports from a web site using the WebBrowser Control. The web site uses Ajax to link an icon back to the source aspx file which then returns a PDF file.
The problem I have is that the WebBrowser control brings up the File Save As dialog box when the PDF file is returned and I can find no way of handling this to cature and save the returned file. I have found other examples of how to manage this using the Navagating event to validate the extension of the file that is being accessed (e.g. [URL] and, if not an HTM, file then use the HTTP Web control to directly download the file. Unfortunately this will not work as the call references a .aspx page.
VS 2008 Make A Button That Download A File Using Http Show A Progress Bar About The Downloading File State?
Sep 17, 2009How can i make a button that download a file using http show a progress bar about the downloading file state?
View 10 RepliesVS 2008 Multiple File Downloader - Only Download One File At A Time
Dec 25, 2009i made downloader that will display the following items to the user. The Name of the file that the user is downloading The Url Were the file is being saved The Size of the file The speed at which the file is being downloaded And the Status. But the Problem is that the downloader can only download one file at a time. How can i make a multiple file downloader Which if the user wants to download 2 or 23 files he can.
View 13 RepliesSearch For Files Recursively While Updating A Progress Bar And Returning The File List To The Application From BackgroundWorker?
Dec 10, 2011I am currently trying to develop an application which will backup large folders to a specified destination. To find all the files in the specified 'backup' directory I am using the following code.
[Code]...
I have tried putting my GetFilesRecursive function into a separate background worker to run first so I can update the GUI however I am struggling on how to return the List of found files back to my application (I get cross-threading exception) and how to update the progress bar to show the progress of the GetFileRecursive function so the user knows it is processing the list of files and has not crashed/frozen.
Creating Download Link To A File On A File Server
Oct 11, 2011I'm looking for a way to (easily, by preference ;)) create a download link to a file on a separate file server.The situation is as follows: the application I'm developing (asp.net 2.0 in vb.net but I have a similar issue in c#, either solution works for me) will be run internally for a company.As is good practice, the file storage and web application are on two separate servers.I basically need to be able to create a download link to a file, the only available URL i have to access the file is servernamefolder1folder2folder3file.txt (can be any sort of file)[code]Which doesn't work for obvious reasons. It used to be set up to write that file to the application path itself and that worked perfectly, but it isn't good practice and that's why I'm changing it (or trying to).I read solutions about creating a download page and then having a table in your DB which holds the links and returns the proper web URL for download but the time constraint I am faced with unfortunately doesn't allow me to develop that.
Assuming I can provide a string with the full filepath to the file like the above, what is the easiest way to just create a link that, when clicked, downloads the document? I have 0 admin rights in this environment. That really isn't helping me. Let's assume I am given the correct link like above and have the appropriate file access rights and such.The above example does work in IE, but not in Firefox and Chrome. IE converts it to a file://servername/... link which does what it's supposed to, but FF and Chrome both actively decided that this is unsafe and have disabled it from their browsers.
Download A File From A Url And Have It Zip To A Specific User Defined File
Jun 15, 2010im going get ot the point i just wanta download a file from a url and have it zip to a specific user defined fileurl so here is my fake code please put in vb 2008 language. [code]
View 1 RepliesDownload A File From Https Site Only Know Partial File Name?
Nov 6, 2009i want to automatic file download using vb from an https site.i don't know the full file name. the file name is make up by 2 pieces, i only the 1st portion of filename.
View 2 RepliesBackgroundworker Inside Another Backgroundworker?
Apr 2, 2012i'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.
View 11 RepliesDownload File With File Information And Progress Bar?
Sep 16, 2009well i'm currently making a downloader for miniclip games to play them offline. i could make the code to get the download link and i could download them getting the code to get the link took some time to collect . i could find through google how to download that link
My.Computer.Network.DownloadFile(TextBox2.Text, SaveFileDialog1.FileName)everything works fine and the file is downloaded successfully, what i need to know now is how to get file size, or how much is downloaded from the file, download speed and show the download on a progressbar
Get To A Webpage That Has A File Link To Download A File?
Jan 4, 2012I am trying to automate file downloads. Sometimes I get to a webpage that has a file link to download a file, but it is not a direct link. Instead it is a PHP request on the server side, for the file.
Is it possible to automate this using the webbrowser control, or is there another way I can do this using VB .NET?
Have Program Download File From Non-file Web Address
Feb 2, 2010I have an account with a website and I want my software to automatically download files that are generated.
I go to the website and login, and then I click a link that downloads a file. Unfortunately, I can't use the My.Computer.Network.DownloadFile function, because the first argument of that function is a file address (http:// www . website . html/file.txt). Instead of that, the address if I look at the link to download the file is something like this (http:// www . website . com/pid=1&output=csv&action=view&pview=pview).
You see how this won't work? I'm looking to use my software to automatically download the file that's available, but I can't use the DownloadFile function.
Download A File Via IE?
Jul 22, 2009We are trying to find a way to download a file (PDF) that is attached as link to a web page. In our VBA application we were using URLDownloadtofile but that command has seemed to stop working and we think the company changed the proxy setup. We believe that the system needs a log in to work correctly, so we decided to try it in VB 2005. I was trying to find out if there is a way for me to use a similar command, and I am hoping that if I stay attached to the web browser active session that I'll be able to bypass the problem.another way to do it that would work in VBA that would be fine too. The benefit to the VBA is that all of the code is written unlink my VB 2005 app which is only partly done.
View 6 RepliesDownload File From FTP?
Nov 8, 2009I have the following code to download the file from FTP. But from the code below, it had set the destination to C: constantly. How should I change the code so that savefiledialog can be prompt and the destination will be the one that choose from savefiledialog??
My.Computer.Network.DownloadFile("ftp://abc.my.com/IN/1.txt", "C:1.txt", "abc", "password")