VS 2010 Downloading Multiple Files At Once?
Oct 31, 2010
I'd like to convert a VB6 application to .Net. It downloads multiple files at once and the progress is shown in a Listview. I'm using the Winsock control in a Usercontrol. Every time I start a new download a new instance of the Usercontrol is loaded. This way I can easily download 25 files at once with very low CPU usage.
I looked into the WebClient Class to download the files, but I noticed it only downloads two files at a time. Other downloads won't start unless one of the first two downloads are finished, but maybe I'm doing something wrong.
1) What's the best way to download dozens of files at once? It must be possible to resume the downloads.
2) How do I keep the downloads apart (index number?), so the Listview can be updated accordingly? I don't need help with the Listview itself.
3) Should I use the Backgroundworker or not?
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Mar 11, 2011
I'm using a WebClient to download a bunch of small files from a website, but doing them one at a time takes a long time, approximately 20-30 minutes for all of them. Is there a way to download multiple files simultaneously, to shorten the time it takes?
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Aug 18, 2010
I've come up with a way of downloading multiple files specified in a txt doc held on a web server. The problem is it only downloads files not folders, im using the following from the codebank to download the files currently:
Try
mCurrentFile = GetFileName(URL)
Dim WC As New WebClient
WC.DownloadFile(URL, Location)
RaiseEvent FileDownloadComplete()
Return True
Catch ex As Exception
RaiseEvent FileDownloadFailed(ex)
[Code] .....
Can I modify this to allow downloading of folders too or will I have to use a completely different method?
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Jan 10, 2011
I'm trying to code a program that can download multiple files at once (on different threads of course). I have created a custom listview component that will allow me to add a progressbar directly to it. What my real question is, how can i take a url given by the user from an input box and create a new webclient to handle the downloadasynchronously
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Feb 21, 2012
i am trying to make a program that will download different files from a direct link and i am having troubles. i can get one file but not anymore. plus is there away to let the user select the folder that the files go to? i tried using the folder browser
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Aug 19, 2010
I was wondering if there was anyway to 'scan' page sources of websites and download only certain files based on their extensions, as you would by going to view -> page source in a web browser? Then, saving, perhaps, a .pdf, or a .swf file? I really don't know where to start.
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Mar 11, 2012
if I had the full path of a .swf file on a website: eg [URL]
I'd have the webbrowser1 navigate to the address as shown before.
Then i'd like to webbrowser to download the file, in compatibility with a savefiledialog.
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Oct 14, 2010
I have used many different "snipets" of code to download .txt from the interent however, each time, instead of showing [code]All failed to put it exactly how it is set out in the beginning. So I was wondering can anyone fix this? I do have a button to press so it downloads it and my declarations are:
-Imports System.IO
-Imports System.Net
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Jan 27, 2011
Here is this code of the webpage:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>File List</title>
<style>
[Code]...
What I am wanting to do is create a program that will load up a page (it is password protected) and get the links out of any files that I need to download. The green text is the text that contains the link and will be repeated for every file.One little thing is that there are multiple pages that are accessed through JavaScript with the code highlighted in red. So, I also need to step through the pages and get a list of all files on subsequent pages.
Everytime I run this program, it will get a list of all files and only download the ones that aren't already downloaded. However, I have never done this before and was wondering what I need.I have accessed the source of pages and parsed it for things like links before, but not sure if that is the optimal way or if there is some other way to handle this particular situation easier, especially since I have multiple pages to deal with and JavaScript.
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May 15, 2012
I have some exe files that I've uploaded into my database as I don't want them to be publicly accessible. I tried using a link button and a generic handler to serve the file using the following code:
Context.Response.Clear()
Context.Response.ContentType = "application/exe"
Context.Response.AppendHeader("Content-Disposition", "filename=program.exe")
Context.Response.BinaryWrite(binaryfile)
The problem: Google Chrome does not treat the download as any other exe, instead after downloading it reports "program.exe is not commonly downloaded and could be dangerous." with a "discard" button and the option to "keep" the download is hidden under a context menu.
serve exe files stored in the database?
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Jun 6, 2011
Im currently working on a program that will download some files and place them inside a folder. The tricky part is that the folder they have to be puttet into is a .jar file. The jar file is always the same place, and that is in %appdata% the full location would be "C:UsersBrugerAppDataRoaming.minecraftinminecraft.jar". With "minecraft.jar" beeing the destination for the files
Ps. Im trying to create a mod installer, since some people are having a little trouble installing mods for minecraft. Minecraft can be found at [URL]
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Mar 9, 2009
I have been trying to download the file from a virtual directory ( which is pointing to some other location) within the web-folder. I have implemented 2/3 ways on doing that, but none of the ways download the file. The asp .net page is not even showing the error, its showing a blank screen. One of the pice of code I implemented is:
<code>
filename = LinkButton2.Text
filepath2 = Server.MapPath("/folders/") & uname & "/" & filename
HttpContext.Current.Response.ContentType = "application/octet-stream"
[code].....
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Jun 23, 2010
All im trying to do is make a program that downloads all the files i want offline and but them in a folder, but when i go to the folder and look at the downloads they are all empty,
Here is my code.
Code:
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Nov 16, 2011
I have about 170 files on the server with the sameending Eix and EPK in the "pack".It would have to withdraw all my files to a predetermined folder "pack".
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Jul 30, 2009
I am using the web client to download a file. Which works ok. However, now I have to download many and the number of files to download will change everyday. I am not sure how I can get the web client to know which files have been downloaded or not? I was thinking of using a for loop to download each file. But I will never know how many there are to download? The web client could download the same file twice?
[Code]...
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Dec 28, 2011
[URL]..it just comes up with an error. am i doing it right? and is there any way i can just download it to the same folder that my program is in no matter what computer its on?
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Apr 28, 2011
im trying to write an updater for my program and im checking the version by downloading a .txt file. however its coming out blank. this is the first time ive done something like this so i probably noobed something bad.[code...]
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Aug 19, 2010
I use to ZIP one file:
Public Function CompressFile(ByRef file As String, ByRef destination As String) As String
'Make sure user provided a valid file with path
If IO.File.Exists(file) = False Then
[code]......
But I can't manage to ZIP more then one file! I've tried using an arraylist.
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Apr 9, 2009
Basically I want to create a little program with 5 or so text fields where I enter the specific names of movies. Upon pressing a "go" button it then does a google search(with certain criteria) for all textfield entries on the website [URL} and then download the files, if possible without opening a browser.
Search criteria:
-only video formats(.avi .mov etc)
-download url contains the "_de" tag (to insure german trailers)
That way it should hopefully find the right trailer and download it. If possible have it use progress bars.
How much work do you think this is? Or is it even possible? From a logical standpoint I don't think it's too much work... I am using Microsoft Visual Studio 2008 Express Edition. My project currently is just full of test code but I will post it anyway:
Code:
Public Class Mainwindow
Private Sub Mainwindow_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
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Mar 4, 2010
I would like to know how to do the following :
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Oct 31, 2010
Here is this code of the webpage:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
[code]....
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Jul 26, 2010
I have a listbox full of links, and I want to download them. The listbox items' text contains a link to a webpage in each one. Now I want to download each page's code to a file site1.html for example. Also for each file I need to add a number site1, site2, site3 ... How do I do that ?
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Nov 11, 2011
I just have 1 listbox which got link in there. How can I download each file using background_worker + progressbar(current file download)?
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Dec 22, 2010
I want to download a list of files and report whether or not each file exists or contains certain qualifiers. The files are text/web documents, with maximum sizes of about 200 KB.
I am using a For loop to iterate through the links, which are placed in an array. The problem is that while my loop is going on, all of my forms become frozen and any status updates I want to show in my forms essentially do not show up because the UI is stuck.
Is there a better way to free up the UI than using DoEvents()? I recall from a previous post that the way my function is being called, it's being called from the UI thread,. Therefore I should just start a new thread so my UI thread doesn't get hung up downloading all the files? Or should I use a timer and download each file at a specific interval so that there's some downtime in between files that allows for me to change the status to tell the user that my program isn't stuck?
Edit and side question: I just realized something really...bad. Basically in my program I play around with DOM for a WebBrowser in my main form. I'm working with a lot of the elements in the document, but they don't always exist because each page takes time to load based on a user's internet connection speed. I WOULD HAVE used a While loop to check if certain elements exist or not, but in the past when I used VB6 I noticed that this causes massive program hangs...so I used a timer instead. But those hangs were the exact same type of hang I seem to be having with this downloading files business.
Now, I just moved from VB6 to .NETa few days ago. But I just read that the reason I used timers in VB6 was because VB6 didn't support multi-threading. So...for all of those instances where I should be using a While loop instead of a Timer, should I just place that While loop code in a new thread so the UI doesn't freeze up?
If so, I am greatly relieved and I can make my code 10 times less ugly. But I will also rip parts of my hair out because it took me like a 100 hours of debugging to get my really crappy timer code working.
This is my code so far:
Code:
Private Function analyzeURLs() As Integer
Dim k As Integer
'did we make it through without any errors?
[Code].....
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Feb 15, 2010
I will be downloading updates for my database and client from a separate executable that will only be used for updating.In order to prevent someone from just decompiling my app through reflector and obtaining the password to the FTP server, what would be the best way to store the FTP password?
I was thinking I could create a table in my SQL database and store it there since a SQL database is way more secure than my app.
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Jun 13, 2011
I'd like to know if there's a way to save all files that are being downloaded trough the Web Browser I've made in my Visual Studio 2010 to a specific location ,by letting user to chose option save file without knowing where it saves.Or maybe to don't show the "save file" thing at all.
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Apr 24, 2010
I know how to send one file, and ive tried to loop that. But then i get error 500 or 550. So what is a good way to send multiple files over FTP?
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Aug 20, 2011
My current code is Imports System.Net Imports System.IO Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click#
Using wc As New WebClient()
wc.DownloadFile("http://link.com/1.swf", Path.Combine("1.swf"))
End Using
End Sub
End Class
And that work's like a charm, however say there was swf's from 1 to 2700 or so, how would i go around making it download each of those files one at a time or all at once? I could do a loop but I'm not the best in Visual Basic 2010
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Sep 20, 2010
I just started playing with VB, so please excuse my ignorance. I've been trying to find an answer in existing threads, but all the stuff there is very confusing to me.I wonder if somebody could create a complete code for me and paste it in an answer to this post.
Basically, what I need is: In VS 2010 - Windows form.
1. Click a button.
2. Grab all files from specified folder on my computer (different extensions = html, txt, bat and some other).
3. Load all the files to specified folder on FTP server replacing existing files without prompt.
4. Display confirmation if succesful or error message. (a progress bar would be handy, but this isn't crucial).
The folder on my computer is always the same folder The folder on the ftp server is always the same folder[URL]..I need to specify username and password for the FTP server
This should all happen without any input from the user - simply click and message saying 'it is done' once all the files were uploaded.
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Mar 2, 2011
I am using an ASP.NET FileUpload to upload files to the server.How to upload it to the rootfolder of my project. I want to add the files to a collection or list of files to be shown on the webpage in the form of gridview.Each file should have a link to itself in the list So that it could be downloaded by the click-if desired.The gridview will also have a delete column so that I can delete any of the corresponding file-as desired.
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