webclient

问题 I want to scrape google suggest in german language: string url = "http://google.de/complete/search?output=toolbar&q=" + txtResults.Lines[i].Replace(" ", "%20%"); WebClient client = new WebClient(); client.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 6.2; WOW64; rv:17.0) Gecko/17.0 Firefox/17.0"); client.Headers.Add("Accept-Encoding:", "gzip, deflate"); client.Headers.Add("Connection:", "keep-alive"); doc.Load(client.OpenRead(url), System.Text.Encoding.UTF8, true); But i always get

问题 I was wondering if it is possible to increase buffer size on WebClient Async data upload, because currently it pushes ~320kB/s maximum. My current code: using (WebClient Client = new WebClient()) { byte[] Buffer = File.ReadAllBytes(this.WorkItem.FileLocation); Client.UploadProgressChanged += new UploadProgressChangedEventHandler(Client_UploadProgressChanged); Client.UploadDataCompleted += new UploadDataCompletedEventHandler(Client_UploadDataCompleted); Client.UploadDataAsync(new Uri("-snip-")

问题 Sometimes the following error occurs by downloading a (large) file: System.Net.WebException: An exception occurred during a WebClient request. ---> System.IO.IOException: Unable to read data from the transport connection: The connection was closed. at System.Net.ConnectStream.EndRead(IAsyncResult asyncResult) at System.Net.WebClient.DownloadBitsReadCallbackState(DownloadBitsState state, IAsyncResult result) --- End of inner exception stack trace --- For me that sounds like the server times

问题 I am attempting to download a file asynchronously using the WebClient class. I have added event handlers for DownloadProgressChanged and DownloadFileCompleted. If I call client.CancelAsync in the download progress event handler, I get an ObjectDisposedException, telling me the file is closed. How do I properly cancel an asynchronous file download? 回答1: It turns out that ObjectDisposedException is thrown, caught and ignored by the WebClient if the file downloads sufficiently fast that progress

问题 I am attempting to download a file asynchronously using the WebClient class. I have added event handlers for DownloadProgressChanged and DownloadFileCompleted. If I call client.CancelAsync in the download progress event handler, I get an ObjectDisposedException, telling me the file is closed. How do I properly cancel an asynchronous file download? 回答1: It turns out that ObjectDisposedException is thrown, caught and ignored by the WebClient if the file downloads sufficiently fast that progress

问题 I have a problem when I use the following code: try { var url = "https://www.telegadmin.com/image/tinakish/qavasi.jpg"; var uri = new Uri(url); using (WebClient webClient = new WebClient()) { using (Stream stream = webClient.OpenRead(uri)) { //bot.SendTextMessageAsync(update.Message.Chat.Id, "تا اینجا اوکیه", replyMarkup: mainMenu); bot.SendPhotoAsync(update.Message.Chat.Id, new FileToSend("test.jpg", stream), caption: "این تصویر از سرور برای شما ارسال شده است", replyMarkup: mainMenu); return

问题 I am trying to download a file using webclient in c#. the remote port of the file location is 20114. How do I tell webclient to use 20114 port? 回答1: set the url as http://www.website.com:20114/folder/file.ext 回答2: My spontaneous guess (without having tried it) would be to simply include it in the url: WebClient client = new WebClient(); client.DownloadFile(@"http://host:20114/file.ext", localFilename); 来源： https://stackoverflow.com/questions/995495/how-to-set-port-for-webclient-in-c

问题 Basically I'm writing some code which does an internal webclient request, gets all the headers and then I want to add those headers to a Redirect() call via a controller. Is there any way to do that? 回答1: Unfortunately it's not possible for security reasons as specified above. 来源： https://stackoverflow.com/questions/16003628/how-to-add-headers-on-a-302-redirect-in-asp-net-mvc

问题 I need do download a string (specifically the JSON array result from a PHP webservice), as a function that returns a string, not DownloadStringAsync. I need this because I am writing a function that downloads the string, and then converts it to a JsonArray. I am using Visual Studio Ultimate 2010, I am developing a Silverlight application, and any help will be appreciated. 回答1: What you're looking for is not synchronous workflows (this would be very difficult, if not impossible, in Silverlight

问题 I am trying to find the index of Mauricio in a string that is downloaded from a website using webclient and download string. However, on the website it contains a foreign character, Maurício. So I found elsewhere some code string ToASCII(string s) { return String.Join("", s.Normalize(NormalizationForm.FormD) .Where(c => char.GetUnicodeCategory(c) != UnicodeCategory.NonSpacingMark)); } that converts foreign characters. I have tested the code and it works. So the problem I have is that when I