Of a class which you’ll see defined in the code. The basis of this is by using a BackgroundWorker as I said earlier, and to let it know just what to do, we’ll send in a instance ”Īs you can see above, the label is set with AutoSize off and I've sized it to be able to show the information as the files download.
For an HTTP resource, the GET method is used.
#Download file with webclient vb.net download#
Method uses the RETR command to download an FTP resource. If you’re using HTTP, then you can modify it as it’sĪ simpler download process (no logging in), but not knowing, I assumed FTP. I have a pretty simple downloader put together which uses FTP to download. I can get you started on the backgroundworker and synchronous downloading if you want, but even that will take me a while, so I don't want to start on it until I hear back from you. What you're asking for is a tall order and doing it the way I just said will be somewhat disappointing (but the idea that I have for a generic one would do exactly what you want - but that's a long way out, if I ever do actually get to putting it together). That being neither here nor there, I think the simplest way would be to do them serially, synchronously, but run it in a background worker and report things "per file" rather than in real time. I say that I will - I've thought about it a while, but I've never put anything together, but I do have an idea on it. It *can* be done but it can't be allowed to run more than one thread for a number of reasons (including the fact that the web host would likely close the connections when it sees that many at once). In the forthcoming weeks, I'll be posting something "generic" about uploading/downloading using the asynch method which handles multiple files. and for every checkboxes there is a download so if i select 4 checkboxes out of 10 checkboxes i get 4 downloads with progress bar and status text:Īnd if possible to download the files one at a time? Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As ) Handles Me.FormClosing ProgressBar1.Value = e.ProgressPercentage Private Sub wc2_DownloadProgressChanged1(ByVal sender As Object, ByVal e As ) Handles wc2.DownloadProgressChanged Private Sub wc2_DownloadFileCompleted(ByVal sender As Object, ByVal e As ) Handles wc2.DownloadFileCompleted Wc2.DownloadFileAsync(New Uri(urlStr), SFD.FileName) If SFD.ShowDialog() = DialogResult.OK Then SFD.DefaultExt = System.IO.Path.GetExtension(fName) Private Sub Button_Download_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button_Download.Clickĭim fName As String = urlStr.Substring(urlStr.LastIndexOf("/") + 1) TOU (Terms Of Use) and make sure you are not violating any of them. However, before downloading files be sure to check out the websites
#Download file with webclient vb.net code#
If you are trying to download the file asynchronously so its not blocking and want to show the progress in a progressbar then you could try setting your code up something like this. I'll wait for you to reply before i continue on, but John is right - no events are available with the synchronous mode of the download. There's still a way to do that and get the progress along the way, although you won't be using an event. If you choose to set it up synchronously, like you have it, then understand that it's a blocking mode - your UI will be totally unresponsive. I can show you another way to get that information though, if you're interested.
If you choose to use the asynchronous method, then you might be stuck on what I brought up earlier about e.TotalBytesToReceive. Send it the integer value of that calculation. If you're talking about 5.5 gigs, you're in excess of the maximum value (an Int32), at least if I did the math right - which I may not have.Įither way though, I think you're better off to always set the minimum to 0, the maximum to 100, then compute the percentage in code. First is how you're setting up your ProgressBar. I don't think you're out of the woods yet though.
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