I have one problem with WebClient.DownloadFile
On asp.net server I have page with this code:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
If Not String.IsNullOrEmpty(Me.Request.QueryString("Tool")) Then
[code].....
I am trying to write a program to download an image at certain time intervals from a website based on a start time, end time and the time interval. I am trying to use 3 timers to accomplish this. I want to be able to kick the program off and leave it running until I stop it. My code seems to work fine if I set the time interval for something like 2 minutes, etc. and sit and watch it, but if I set it for an hour and leave it alone, it gives me almost sporadic results.
I set it to start at 10 pm last night and end at 5 am this morning with an interval of 1 hour. It downloaded an image at 10 pm, 11 pm, 12 am, 1 am, 2 am, and 3 am and then there were no images for 4 and 5 am. I have tried this multiple times with different time spans, and seem to get sporadic results. Any insight would be greatly appreciated. Here is my current code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If TextBox1.Text.Length = 0 Or cmbStartTime.Text.Length = 0 Or cmbEndTime.Text.Length = 0 Or TextBox2.Text.Length = 0 Then
MsgBox("You must select an image destination, start time and time increment.")
Else
[code]....
I'm automating downloads. I was getting this error quite a bit using Webbrowser to navigate to a PDF (various PDFs at various websites). In other words the PDF was already on display in the browser when I called WebClient.DownloadToFile. I got a LOT better results when I desisted from WebClient and switched to this API (just pass in the two strings along with zeroes for the other parameters).
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And yet Webclient seems oriented for only two entries (username and password). How do you set up the credentials for three entries? I hate to abandon WebClient, but at this point I just don't know how to make it work.
I'm downloading a file from my website using WebClient.DownloadFile(),I'm wanting to do it asynchronously, so my UI stays responsive, that would require me creating an array of web clients, is that bad practice? Or is it acceptable?I have looked into FileWebRequest, but thought WebClient looked easier to implement.
View 10 RepliesHow to download multiple files with a wildcard pattern using webclient DownloadFile? Like project* from [URL]..
View 1 RepliesI am using Visual Basic 2010. I use successfully webclient downloadfile to download a file from a remote website. Now I want "protect" downloading so one have to "login" before to download the file. (i.e. I should like it is not possibile to simply type [URL] to download the file and so the downloading is possible only by my VB app.) I "protect" the website by a login page. I try to use webclient.credential(username,password) but the system message is error HTTP 404 (page not found).
View 4 Repliesrecently discovered the My.Computer.Network.DownloadFile method and would love to use it to download files from a website (https://www...). I can include a username and password in the DownloadFile parameter list,but will it send the password in plain text? If so, is there a way to send an encrypted password?
There seem to be many ways to download files. What are the advantages or typical uses of each?
I have tried using the My.Computer.Network.DownloadFile method but unfortunately it is slow.
Executing the simple command below takes ~5-10 secs, which I would say is a lot longer than expected for downloading a 9 kb file.`My.Computer.Network.DownloadFile("http://www.google.dk", "j: emp est.html")
I'm a beginner to Visual Basic, and I made a simple program, however I want to put a 'check update' button in it... It consists of downloading a txt file that contains three numbers, if it match with the version of the program it says 'you already have the most up-to-date version' or else it asks you to download the update and then bring you to the dev blog of the program I made, however, when I download that file, it brings me a blank txt file instead of the one I uploaded into the site. By the way, I'm downloading it through HTTP.
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I have a small dilemma... how can I see the download progress when using My.Computer.Network.DownloadFile
My.Computer.Network.DownloadFile("http://some_url.com/a_file.txt", "the_file.txt")
I'm trying to download a file from the internet by clicking a button in MS Access.
I'm trying to use My.Computer.Network.DownloadFile as described here: [URL]
Private Sub Command2_Click()
My.Computer.Network.DownloadFile("http://www.example.com/temp/xml_test.xml", "C:xml_test.xml")
End Sub
but the 'Microsoft Visual Basic for Applications' IDE that I'm typing this into seems to have no idea what I'm talking about (text just turns red).
Can I just not do this through the built in VB editor or can I simply load a library or something to make it work?
Sorry but I'm very new to VB and to Access so search results are not specific enough for me to understand - lord knows I've tried.
I'm using Access 2010 but the DB was created in an previous version - not sure if that matters.
My.Computer.Network.DownloadFile("http://MyDomain.info/MyFile.zip", SaveFileDialog)Hi, the above don't work, what i need is for it to popup a savedialog for the user to browser for a location to download the file
View 4 RepliesWell my Application should download a File from my FTP when i Click Donwload but i am having Problems it doesn't really Download it good:
Dim clsRequest As FtpWebRequest = System.Net.WebRequest.Create("ftp://------/public_html/----/" & lb_1.SelectedItem & "/" & "Firmware" & "/" & lb_3.SelectedItem)
clsRequest.Credentials = New System.Net.NetworkCredential("------", "-------")
clsRequest.Method = System.Net.WebRequestMethods.Ftp.DownloadFile
[code]....
The below code for some reason isn't working with filefront. I'm grabbing the URL that returns the file to download but the wc.downloadfile() code doesn't download the file. It creates an empty file called 100.rar in my temp directory on C: but doesn't have any data. Is there something I'm doing wrong or is filefronts redirect messing something up? If I put the URL I get with the fixUrl variable, it pops up the file to download in my internet browser fine.
Imports System.Net
Imports System.Windows.Forms
Imports System.Security.Permissions
Imports System.Text.RegularExpressions
Imports System.IO
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I try to download a file by using the My.Computer.Network.DownloadFile 'command'. The path i use is this: [URL]. Everytime i want to download it, it downloads the HTML file of this zippyshare page! I want just the .mp3. How can i do that?
View 4 RepliesI have a problem when i use My.Computer.Network.DownloadFile from a iseries share path
View 2 RepliesHow do I have it overwrite the file if it already exists with My.Computer.Network.DownloadFile?
Here's the code for where its needed but, this is not all of the code
My.Computer.Network.DownloadFile _
("http:mirror.cc.vt.edu/pub/mozillaseamonkey/releases/1.1.14/seamonkey-1.1.14.en-US.win32.installer.exe", _
"C:\Program Files\Warez-One Package Manager\Downloaded Packages\seamonkey-1.114.en-US.win32.installer.exe")
Any way to set (force) using binary or text for ftp in My.Computer.Network.DownloadFile?
View 4 RepliesI use this line to download files: My.Computer.Network.DownloadFile(VideoFilename, SaveLocation, "", "", True, 8000, True But if a users cancel the download my application crashes. I searched Google but there's very little info about this problem. I tried with: My.Computer.Network.DownloadFile(FilenameMP3, SaveLocation, "", "", True, 8000, True, FileIO.UICancelOption.ThrowException, FileIO.RecycleOption.SendToRecycleBin()) But that line of code doesn't work. I need to get rid of the file when a users cancel
View 1 RepliesIm using My.Computer.Network.DownloadFile(OnlineLocation, FullLocal) to download a file, how can i check when its done and also i want to track the progess with a progressbar. How do i do this?
View 25 RepliesI'm trying to access a web server to download a file, but when I run the statement gives me the following WebException:
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I have read about Network.Downloadfile and I think I understand it! I want to know if there is an easy way to test a files date modified before downloading it. I have a lot of files in the folder. I really want to "sync" the folder. I don't want to copy every file every time I want to only download the file if I don't have the file in the destination location or if I have an Old copy.
View 4 RepliesMy.Computer.Network.DownloadFile is a built in .NET method, can I make it display the download via a progress bar;It currently hangs my whole application until the download is complete; i would like to make a thread and have a visible view of the download progress;
View 3 RepliesI am working on a visual basic project to download files from the internet. Well i have a Url textbox, directory textbox, and a download button. And YES i have done some research and i know it is something like... wclient.DownloadFile(Url.Text,Directory.text) but for some reason "wclient" doesn't work it says its "not defined"..? What else should i use or how should i declare it? Should i import something?
View 1 RepliesI would like the VB.net WebClient to remember cookies.
I have searched and tried numerous overloads classes.
I want to login to a website via POST, then POST to another page and get its contents whilst still retaining my session.
Is this possible with VB.net without using WebBrowser control ?
I tried Chilkat.HTTP and it works, but I want to use .Net libraries.
I use
wb as webclient
wb.downloadstring(url)
Say 40 seconds have passed. I want wb to just give up. How to do so?
well its werid it worked once but then it just randomly stop i do havenamespace
Imports System.net
Imports System.IO
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as per usual i am a little confused. I know DownloadStringAsync runs on a threaded pool with a default min and max threads limit, but what confuses is how would i call DownloadStringAsync say for example ten times.Example.I have an array with 10 URLS. Surely i would not use a for each loop of the array index to pass the url address while each time calling DownloadStringAsync(New Uri("someArray(index)") surely we can pass say a range of items from the array and let DownloadStringAsync decide on the threaded pool how many to process each time?
View 6 RepliesI need to write a process to download an html file locally in my vb.net web app. I am currently using webClient.DownloadFile :
Dim myWebClient As New System.Net.WebClient
myWebClient.DownloadFile("http://archive.ncsa.illinois.edu/primer.html", _
"C: est.html")
Is there a built-in way to do this with a "save as" window instead, so that the user can select the location they would like the file to be saved to? Or would I need to write my own?
Using the following VB.Net simple code to upload files in FTP, a call to WebClient.CancelAsync() doesn't actually cancel the upload.Does someone know why, and what can be done about this?
Private Sub UploadProgressChanged(ByVal sender As Object, ByVal e As System.Net.UploadProgressChangedEventArgs)
'TO-DO: Why is pbar empty?
ProgressBar1.Value = e.ProgressPercentage
Label1.Text = e.BytesSent & " bytes sent"
End Sub
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