webclient-download

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 In the pre-async days, people wanted to know how to set the timeout on WebClient and the answer was simply to extend the base class and override GetWebRequest() and set the timeout there. protected override WebRequest GetWebRequest(Uri address) { // NOTE: this override has no affect if the Async methods are used!!! WebRequest request = base.GetWebRequest(address); ((HttpWebRequest)request).Timeout = 20 * 60 * 1000; ((HttpWebRequest)request).ReadWriteTimeout = 20 * 60 * 1000; return request; }

问题 In the pre-async days, people wanted to know how to set the timeout on WebClient and the answer was simply to extend the base class and override GetWebRequest() and set the timeout there. protected override WebRequest GetWebRequest(Uri address) { // NOTE: this override has no affect if the Async methods are used!!! WebRequest request = base.GetWebRequest(address); ((HttpWebRequest)request).Timeout = 20 * 60 * 1000; ((HttpWebRequest)request).ReadWriteTimeout = 20 * 60 * 1000; return request; }

问题 I'm trying to download an html document from Amazon but for some reason I get a bad encoded string like "��K��g��g�e". Here's the code I tried: using (var webClient = new System.Net.WebClient()) { var url = "https://www.amazon.com/dp/B07H256MBK/"; webClient.Encoding = Encoding.UTF8; var result = webClient.DownloadString(url); } Same thing happens when using HttpClient: var url = "https://www.amazon.com/dp/B07H256MBK/"; var httpclient = new HttpClient(); var html = await httpclient

问题 I'm trying to download an html document from Amazon but for some reason I get a bad encoded string like "��K��g��g�e". Here's the code I tried: using (var webClient = new System.Net.WebClient()) { var url = "https://www.amazon.com/dp/B07H256MBK/"; webClient.Encoding = Encoding.UTF8; var result = webClient.DownloadString(url); } Same thing happens when using HttpClient: var url = "https://www.amazon.com/dp/B07H256MBK/"; var httpclient = new HttpClient(); var html = await httpclient

问题 I have a web service, like this example for downloading a zip file from the server. When i open the URL through web browsers,I can download the zip file correctly. The problem is when I try to download the zip file through my desktop application. I use the following code to download: WebClient webClient = new WebClient(); webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(Completed); webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ProgressChanged);

问题 I have a web service, like this example for downloading a zip file from the server. When i open the URL through web browsers,I can download the zip file correctly. The problem is when I try to download the zip file through my desktop application. I use the following code to download: WebClient webClient = new WebClient(); webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(Completed); webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ProgressChanged);

问题 I'm kind of running out of options now... Attempt 1 Use iwr in Powershell. It works, shows progress but its 10X slower and doesn't flush until while file is in memory :(. powershell -command "& { iwr https://github.com/mitchellspryn/AirsimHighPolySuv/releases/download/V1.0.0/SUV.zip -OutFile SUV.zip }" Attempt 2 Use .Net webclient in Powershell. It works but shows no progress and you can't terminate by Ctrl+C :(. Last issue is a big setback. powershell -command "& { (New-Object System.Net

问题 I am trying to download files from a website with username/password. You need to pay for a registered account in order to download files - which we have done. I am attempting to pass in the username/password and download a file as follows: if (docUrl != null) { if (!string.IsNullOrEmpty(username) && !string.IsNullOrEmpty(password)) this.WebClientInstance.Credentials = new NetworkCredential(username, password); fileData = this.WebClientInstance.DownloadData(docUrl); this.WebClientInstance

问题 I am trying to download files from a website with username/password. You need to pay for a registered account in order to download files - which we have done. I am attempting to pass in the username/password and download a file as follows: if (docUrl != null) { if (!string.IsNullOrEmpty(username) && !string.IsNullOrEmpty(password)) this.WebClientInstance.Credentials = new NetworkCredential(username, password); fileData = this.WebClientInstance.DownloadData(docUrl); this.WebClientInstance