webclient

问题 I'm using WebClient to make a request to an API that has a very long running process. But I don't actually need to know the result, I only need the process to be started. It doesn't matter to me if the process succeeds or fails. So I want to drop the connection as soon as I have made the request. How can I drop the webclient's connection? I don't want to wait 30 - 60 seconds for the response: var client = new WebClient(); string url = "http://example.com/SomeVeryLongRunningProcess/parameter";

问题 public bool DownloadMp3File (DownloadedMp3 mp3) { WebClient client = new WebClient (); string filePath = ""; bool wasDownload = false; try { string song = mp3.SongName; filePath = @"mp3\" + song + ".mp3"; if (File.Exists (filePath)) { File.Delete (filePath); } DateTime tryCountNow = DateTime.Now; client = new WebClient (); client.DownloadFileAsync (new Uri (mp3.Url), filePath); client.DownloadProgressChanged += client_DownloadProgressChanged; client.DownloadFileCompleted += client

问题 I am trying to download data using a Webclient object in chunks of 5% each. The reason is that I need to report progress for each downloaded chunk. Here is the code I wrote to do this task: private void ManageDownloadingByExtractingContentDisposition(WebClient client, Uri uri) { //Initialize the downloading stream Stream str = client.OpenRead(uri.PathAndQuery); WebHeaderCollection whc = client.ResponseHeaders; string contentDisposition = whc["Content-Disposition"]; string contentLength = whc[

问题 I'm developing a credit card charging server for a hotel booking system that can either be used manually through a web UI or automatically for non-refundable bookings. Each transaction goes through a proxy service (third party cc store, PCI Booking) and from there to the actual payment provider. I then save the responses (Success, card declined, etc), the provider name and the time it took to charge. When I charge manually, everything works fine but when there are several automatic requests

问题 I am working an a VB.NET console application which automatically downloads textfiles from different websites. So far I've been using My.Computer.Network.DownloadFile(url, local_path, username, password) and it works fine - but there is one website which uses cookies. Under normal circumstances I have to manually visit the website in my browser, login by entering my credentials into a login form, press the "Log in" button and then there is a link which lets me download the file. If I use this

问题 I am working an a VB.NET console application which automatically downloads textfiles from different websites. So far I've been using My.Computer.Network.DownloadFile(url, local_path, username, password) and it works fine - but there is one website which uses cookies. Under normal circumstances I have to manually visit the website in my browser, login by entering my credentials into a login form, press the "Log in" button and then there is a link which lets me download the file. If I use this

问题 I'm having issues downloading files from an ftp in powershell, this script tries to setup the connection, search for some files (I got this part right) and then download it in the working directory, I got issues don't know why, please help!! Here's the code: #IP address of DNS of the target % protocol $protocol="ftp" $target = "XXXX" $connectionString = $protocol+"://"+$target #Method to connect $Request = [System.Net.WebRequest]::Create($connectionString) $Request.Method = [System.Net

问题 I have a 10 mb file at an URI I download it with the following codes. WebClient wc = new WebClient(); string file = wc.DownloadString(http://www......com); Can I download certain sizes of this file, such as 1 mb, 5 mb. not whole 10 mb. ? Then stop downloading? Thanks. 回答1: Add the HTTP Range header in your request. Note that this will only work if the server supports it. See http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html for more information about it 回答2: you can use httpwebrequest to

问题 Get .txt file instead of .jpg - using Webclient and DownloadFile(); I'm trying to download the .jpg from this URL: http://1.bp.blogspot.com/_pK6J3MTn5co/S6kuH3aqbeI/AAAAAAAACUY/06axvmjU91k/s1600-h/avengers02_B&W_UL.jpg Using this code: private void TEST_button1_Click(object sender, EventArgs e) { WebClient MyDownloader = new WebClient(); MyDownloader.DownloadFile(@"http://1.bp.blogspot.com/_pK6J3MTn5co/S6kuH3aqbeI/AAAAAAAACUY/06axvmjU91k/s1600-h/avengers02_B&W_UL.jpg", @"c:\test.jpg"); }

问题 I wanna get table from this url but content loads by javascript. I download HTML string like this WebClient wc = new WebClient(); var html = wc.DownloadString("https://www.bloomberg.com/markets/currencies"); how can i get javascript loaded content?? 回答1: WebClient and DownloadString will just download the content of the page as string, to be able to run the JavaScript code on this page, you will need an object which understand DOM and can run JavaScript, this will be a browser. Some more