Using DownloadFileASync (WebClient) For Multiple Downloads?
Oct 28, 2011
I'm trying to download multiple files based on what a user has selected on a formI have multiple checkboxes in place, so If a user would select Checkboxes 1,3,4 I would want the webclient to download files 1.txt, 3.txt, 4.txt.The WebClient method is causing a "WebClient does not support concurrent I/O operations." error.
If chk1.Checked Then
WC.DownloadFileAsync(New Uri("http://www.google.com/1.txt), Path.Combine(DataSource & strDirectory, "1.txt"))
[code].....
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Nov 14, 2011
I have a desktop application from where i want to download files from the web server. when i am downloading a single file then there is no problem. but when i want to download more than one file there is an error like "WebClient does not support concurrent I/O operations".
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Dec 11, 2011
I am trying to make a download manager for my program. But when I run this code it gives me the message box say "Download Started" but that is it. I do not get any file downloaded or progress bar change? Does anyone know why?Public Class frmDownloader
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
WebClient1.DownloadFileAsync(New Uri("https://s3.amazonaws.com/MinecraftDownload/launcher/Minecraft_Server.exe"), "C:hi.exe")
MsgBox("download started")
End Sub
[Code]...
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Jul 2, 2009
I have this proyect where Im trying to do a program that concentrates all the Weather related links,information, and images in a single place, to make easier the job for a friend teacher whos a meteorologist.
the program per se does a lot of "parsing" of htmls, eliminating the information not needed and also download automatically certain images ( Satellite specially.. ) most of these images are... sort of hidding inside the html ( thus the parsing.)[code]...
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May 1, 2010
I'm trying to download a simple text file from a web server. It's easily accessible from the web browser and I can download it from the web browser. However, whenever I use a WebClient to download the file, I get a 403 Access Forbidden Error! I'm not sure what I'm supposed to do. I haven't come across this kind of error in programming before and I'm not sure what I'm supposed to do to get around it.
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Feb 19, 2012
[code]It gives me problems right there because it downloads the file but not the data in it,url... is 1 kb and has one character in it - 1, when it downloads it has the right name and extention but the contents and size is gone size is 0 bytes and contents are empty.
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Apr 9, 2009
I've just switched my code over that downloads data as bytes to use a WebClient. I add a header saying I will accept GZip and the site I'm downloading from sends me the data compressed. The problem is, how can I check to make sure it is compressed data before attempting to decompress it? It was much simpler when I was using a Web Request to check the response headers, but I'm having a little trouble checking the reponse headers with a WebClient. Does anybody out there accept compression with a WebClient?
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Feb 20, 2012
It was working fine until I changed it to connect to an ftp sever, added NetworkCredentials and said connect, downloads fine but does not trigger the events like its supposed to. What do I do to fix this?I'm sorry if I misspelled something or my grammar is wrong, I've never done well in those subjects.
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Nov 30, 2011
When I use My.Computer.Network.DownloadFile this will sometimes start downloading two copies of the file simultaneously. I wonder if there is a code to check whether there are more than one file being download at a moment, and if there is a code to cancel some of the downloads.
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May 19, 2012
Okay so I've dug around all day and found that using multiple "background workers" would do what I would need for my application.How can I create 4 background workers and then feed the urls to the webrequest from a listbox? [code]
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Jun 10, 2011
How to download multiple files with a wildcard pattern using webclient DownloadFile? Like project* from [URL]..
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Mar 22, 2010
I'm getting the following error "Object reference not set to an instance of an object." from line (24):filedownloader.DownloadFileAsync(remotePath, localPath)in the following code.
vb
Dim id As Integer = lbBackdrops.SelectedIndex
Dim localPath As String = "tempBackdrops" & allBIDs(id) & "" & allBFNs(id)
[code].....
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Nov 2, 2010
Is it possible to resume a download with DownloadFileAsync?
If not, then how can I asynchronously download files and resume them?
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May 9, 2012
I have a chunk of code that downloads a file using DownloadFileAsync. If I disconnect the internet the button clicks and nothing happens. I want to throw an exception if the internet is down and also if the download fails. [code]
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Jun 17, 2010
I'm trying to download a file, which works fine, but the progress-bar is showing me no progress and because of that the form doesn't close. Could anyone tell me what is/could be wrong with my code. The weird thing is that the same code is working in my another app. [Code]
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Feb 20, 2011
Its a single file downloader (the file location is in the code) and it only downloads the file as 0kb (it debugs fine). Also, i think my directory finder is not working, as i did it the simple way, because i dont know the environment code.
Imports System.Net
Public Class Form1
Dim Directory As String
Private WithEvents Client As New WebClient
[code]...
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Jul 21, 2011
I have a VB app that ftp downloads a csv file every 5 minutes it contains a columns with data and one column with date and time. I need to figure out how to determine if the data changed based on whether or not the date column updated. Currently I parse the file in and drop a couple columns and do a sql update to a database.
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Sep 12, 2011
I am using HttpWebRequest/Response to download a file. What would i need to do on the coding side to allow resuming of interupted downloads and what would i need to know from the server if it allows me to do this?
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Jan 20, 2012
I want to create a program in VB that downloads an .exe (Note: Someone else's program, not mine) through a URL, runs it and installs it on the background.My knowledge of VB is not very large. So before starting my search on how to do each step, I would like to know from experienced programmers if it's possible to do this and how hard it would be?
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Jun 7, 2012
I'm trying to get this routine to resume the downloads.I use the same routine to download a file all the way thru non-stop..so at least the download part is working..however either the stop commands i'm using or the resume routine i thought would work is all ass backwards I'm not gonna make any conclusions or anything on this one..made myself look stupid the last time i know you all are def smarter than me when it comes to this stuff,,and dangit that just erks me to no end i tried adding a exit do in the do loop..and that of course exits ok,,but when the file is resumed is larger than its supposed to be.
[Code]...
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May 14, 2009
I have a program that downloads a text file from the internet. Inside the file, is: 4.5.0.0
I need a way to remove the '.', and delete them, leaving me with 4500, but I've never used Regex and the tutorials on the internet are confusing.
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Jan 1, 2012
I'm using VB 2010 express, i have gecko webbrowser loaded in my project. I would to to have the option whether to download or cancel a file before the gecko browser download from the net. For instance, a webpage has several images, so i'd like to download a particular image only.
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May 8, 2009
as the title says; its starting to download with IE download manager, and i want to block it, [and use my own downlaod manager]
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Nov 25, 2011
I have searched a lot on Google about Pausing and Resuming Downloads and I find the examples with background workers but I don't understand them and that is why I can't change the code according to my app.Is there an easy way of doing this or do I have to do it the hard way?
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Jun 29, 2011
I have an application where the admin user can create users and upload documents to the server for the created user to download.
When uploading a file it creates a folder using the userid as the folder name and saves in that folder within a folder called documents e.g. ~documents/77b29079-43d6-4520-bc34-77ae2af1b131/documentname.xls
The client then has to login and will see a list of available documents for that user only. The only problem is that if someone was to get hold of one of the urls to a document is can be downloaded without having to login.
Is there something I can do to stop access to these files?? I have tried editing the web.config file to only allow access to certain roles but i could still download a document without logging in.
<location path="documents">
<system.web>
<authorization>
[Code]....
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Jan 20, 2012
I eyed VB.NET 2010 Express and created the damn app. It's up and running and it does what it's supposed to do (in v1). Now I'd like to distribute it for free while:
(1). Have a reliable way of knowing (and everybody can check this out) the number of downloads.
(2). The app cannot be passed from one user to another, but has to be downloaded from the reputable biz (there can be more than one biz) that accurately provides the number of downloads.
(3). I can have total control over the app (once it's downloaded by the users), that is if I want to inform the users of updates or whatever, or if I want to add some ad windows to the form I can do it whenever I want and how I please.
How do I do (1) to (3)? What am I supposed to read to do (3)? ADO.NET and ASP.NET? Any shortcut? What's the easiest way of doing it? I'm not sure I'm looking for a career in programming, for now I just want to take this app off my shoulders and go back to daydreaming.
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Feb 27, 2012
MVC3 VB.NET Razor view Application... I have a view that uses a for each loop to display all the available courses. Next to each of these I would like to place a Html link to download that courses class handout file. Problem is I have not found anything on any forums about assigning the value to the hyperlink dynamically since it will vary with every iteration of the for each loop. I have coded the model to hold the file name associated with each class. Below is a snippet from the view..
[Code]...
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Mar 19, 2011
I'm trying to implement my own downloader. I have the download Form and I had a way to show it but, It's inefficent because, It just checked for ending extensions!I just want to cancel the download and show my downloader with the URL.[code]...
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Mar 13, 2012
Is Visual Basic 6.0 and/or Visual Studio 6.0 available from MSDN subscriber downloads?If yes, please forward me a link to it.I can't find either Visual Basic 6.0 nor Visual Studio 6.0 from subscriber downloads.
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Mar 3, 2009
Does anyone have a program that will find Visual Basic 2008 code and place it into an organized code library?
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