How to download a file from a website in C

Question

Is it possible to download a file from a website in Windows Application form and put it into a certain directory

User · Answer

Sure  you just use a HttpWebRequest   Once you have the HttpWebRequest set up  you can save the response stream to a file StreamWriter Either BinaryWriter  or a TextWriter depending on the mimetype   and you have a file on your hard drive   EDIT  Forgot about WebClient  That works good unless as long as you only need to use GET to retrieve your file  If the site requires you to POST information to it  you ll have to use a HttpWebRequest  so I m leaving my answer up

User · Answer

You can use this code to Download file from a WebSite to Desktop   using System Net   WebClient client   new WebClient     client DownloadFileAsync new Uri  http   www Address com File zip    Environment GetFolderPath Environment SpecialFolder Desktop     File zip

User · Answer

With the WebClient class   using System Net        WebClient Client   new WebClient     Client DownloadFile  http   i stackoverflow com Content Img stackoverflow-logo-250 png     C  folder stackoverflowlogo png

User · Answer

Try this example   public void TheDownload string path      System IO FileInfo toDownload   new System IO FileInfo HttpContext Current Server MapPath path       HttpContext Current Response Clear      HttpContext Current Response AddHeader  Content-Disposition                 attachment  filename     toDownload Name     HttpContext Current Response AddHeader  Content-Length                toDownload Length ToString       HttpContext Current Response ContentType    application octet-stream     HttpContext Current Response WriteFile patch     HttpContext Current Response End         The implementation is done in the follows   TheDownload    c  Temporal Test txt       Source  http   www systemdeveloper info 2014 03 force-downloading-file-from-c html

User · Answer

You may need to know the status during the file download or use credentials before making the request   Here is an example that covers these options   Uri ur   new Uri  http   remotehost do images img jpg     using  WebClient client   new WebClient            client Credentials   new NetworkCredential  username    password        String credentials   Convert ToBase64String Encoding ASCII GetBytes  Username           MyNewPassword         client Headers HttpRequestHeader Authorization      Basic  credentials         client DownloadProgressChanged    WebClientDownloadProgressChanged      client DownloadDataCompleted    WebClientDownloadCompleted      client DownloadFileAsync ur    C  path newImage jpg        And the callback s functions implemented as follows    void WebClientDownloadProgressChanged object sender  DownloadProgressChangedEventArgs e        Console WriteLine  Download status   0      e ProgressPercentage           updating the UI     Dispatcher Invoke      gt            progressBar Value   e ProgressPercentage             void WebClientDownloadCompleted object sender  DownloadDataCompletedEventArgs e        Console WriteLine  Download finished          Ver 2  - Lambda notation  other possible option for handling the events  client DownloadProgressChanged    new DownloadProgressChangedEventHandler delegate object sender  DownloadProgressChangedEventArgs e        Console WriteLine  Download status   0      e ProgressPercentage           updating the UI     Dispatcher Invoke      gt            progressBar Value   e ProgressPercentage               client DownloadDataCompleted    new DownloadDataCompletedEventHandler delegate object sender  DownloadDataCompletedEventArgs e       Console WriteLine  Download finished            Ver 3  - We can do better  client DownloadProgressChanged     object sender  DownloadProgressChangedEventArgs e    gt        Console WriteLine  Download status   0      e ProgressPercentage           updating the UI     Dispatcher Invoke      gt            progressBar Value   e ProgressPercentage              client DownloadDataCompleted     object sender  DownloadDataCompletedEventArgs e    gt         Console WriteLine  Download finished           Ver 4  - Or  client DownloadProgressChanged     o  e    gt        Console WriteLine   Download status   e ProgressPercentage               updating the UI     Dispatcher Invoke      gt            progressBar Value   e ProgressPercentage              client DownloadDataCompleted     o  e    gt         Console WriteLine  Download finished

User · Answer

Also you can use DownloadFileAsync method in WebClient class  It downloads to a local file the resource with the specified URI  Also this method does not block the calling thread   Sample       webClient DownloadFileAsync new Uri  http   www example com file test jpg     test jpg      For more information      http   csharpexamples com download-files-synchronous-asynchronous-url-c

User · Answer

Use WebClient DownloadFile   using  WebClient client   new WebClient          client DownloadFile  http   csharpindepth com Reviews aspx                              c  Users Jon Test foo txt

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