downloadfileasync

VB - Using DownloadFileASync (WebClient) for multiple downloads

由 扶醉桌前 提交于 2020-06-18 09:33:29
问题 I'm trying to download multiple files based on what a user has selected on a form. I 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")) End If If chk2.Checked Then WC

VB - Using DownloadFileASync (WebClient) for multiple downloads

由 偶尔善良 提交于 2020-06-18 09:31:35
问题 I'm trying to download multiple files based on what a user has selected on a form. I 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")) End If If chk2.Checked Then WC

WebClient DownloadFileAsync hangs

由 南笙酒味 提交于 2020-01-03 10:45:41
问题 Good day. I'm working on file downloader class using DownloadFileAsync. In normal situations everything works fine. But when I'm downloading file and disable network connection, downloading progress is just stops for infinite time, without raising any errors or calling any callbacks. Any ideas how to handle this situation? Many thanks. _client.Proxy = WebRequest.DefaultWebProxy; _client.DownloadProgressChanged += (sender, argv) => { actionCallback(argv.ProgressPercentage); } _client

Downloaded file using webclient.DownloadFileAsync has 0KB

由 人盡茶涼 提交于 2019-12-17 20:32:28
问题 I'm trying to download zend-framework (from http://framework.zend.com/releases/ZendFramework-1.11.11/ZendFramework-1.11.11.zip) simply using WebClient string url = "http://framework.zend.com/releases/ZendFramework-1.11.11/ZendFramework-1.11.11.zip"; WebClient downloader= new WebClient(); downloader.DownloadFileAsync(new Uri(url), "C:\\temp.zip"); The file is created, but it is empty. I checked response using fiddler and I get HTTP 200, correct content-length but "connection: closed" and

Webclient downloadfileasync not working

由 依然范特西╮ 提交于 2019-12-11 05:55:39
问题 I got a WPF application and I want to download a file. I'm using System.Net; and I have the following code: WebClient ww = new WebClient(); ww.DownloadFileAsync( new Uri("http://www.sinvise.net/tester/1.jpg"), AppDomain.CurrentDomain.BaseDirectory + "\\1.jpg"); The problem is, is that it doesn't download the file, it's just showing up as 0kb file and not downloading, I don't know what the problem is, can anyone help? 回答1: How about listening for the DownloadFileCompleted event and checking

WebClient.DownloadProgressChanged: Console.WriteLine() is blocking UI thread

由 浪尽此生 提交于 2019-12-08 19:14:27
I have the following simple code: private void btn_download_Click(object sender, EventArgs e){ WebClient client = new WebClient(); client.DownloadProgressChanged += client_DownloadProgressChanged; client.DownloadFileAsync(new Uri("http://.../file.zip"), "file.zip"); } void client_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e){ //Prints: "Downloaded 3mb of 61.46mb (4%)" Console.WriteLine("Downloaded " + ((e.BytesReceived / 1024f) / 1024f).ToString("#0.##") + "mb" + " of " + ((e.TotalBytesToReceive / 1024f) / 1024f).ToString("#0.##") + "mb" + " (" + e

WebClient.DownloadProgressChanged: Console.WriteLine() is blocking UI thread

由 北慕城南 提交于 2019-12-08 04:48:23
问题 I have the following simple code: private void btn_download_Click(object sender, EventArgs e){ WebClient client = new WebClient(); client.DownloadProgressChanged += client_DownloadProgressChanged; client.DownloadFileAsync(new Uri("http://.../file.zip"), "file.zip"); } void client_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e){ //Prints: "Downloaded 3mb of 61.46mb (4%)" Console.WriteLine("Downloaded " + ((e.BytesReceived / 1024f) / 1024f).ToString("#0.##") + "mb" +
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