How to download a file from a URL in C

Question

What is a simple way of downloading a file from a URL path

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

Complete class to download a file while printing status to console   using System  using System ComponentModel  using System IO  using System Net  using System Threading   class FileDownloader       private readonly string  url      private readonly string  fullPathWhereToSave      private bool  result   false      private readonly SemaphoreSlim  semaphore   new SemaphoreSlim 0        public FileDownloader string url  string fullPathWhereToSave                if  string IsNullOrEmpty url   throw new ArgumentNullException  url            if  string IsNullOrEmpty fullPathWhereToSave   throw new ArgumentNullException  fullPathWhereToSave             this  url   url          this  fullPathWhereToSave   fullPathWhereToSave             public bool StartDownload int timeout                try                       System IO Directory CreateDirectory Path GetDirectoryName  fullPathWhereToSave                 if  File Exists  fullPathWhereToSave                                 File Delete  fullPathWhereToSave                             using  WebClient client   new WebClient                                  var ur   new Uri  url                      client Credentials   new NetworkCredential  username    password                    client DownloadProgressChanged    WebClientDownloadProgressChanged                  client DownloadFileCompleted    WebClientDownloadCompleted                  Console WriteLine   Downloading file                     client DownloadFileAsync ur   fullPathWhereToSave                    semaphore Wait timeout                   return  result  amp  amp  File Exists  fullPathWhereToSave                                   catch  Exception e                        Console WriteLine  Was not able to download file                 Console Write e               return false                    finally                       this  semaphore Dispose                         private void WebClientDownloadProgressChanged object sender  DownloadProgressChangedEventArgs e                Console Write   r     -- gt      0      e ProgressPercentage              private void WebClientDownloadCompleted object sender  AsyncCompletedEventArgs args                 result    args Cancelled          if    result                        Console Write args Error ToString                       Console WriteLine Environment NewLine    Download finished              semaphore Release               public static bool DownloadFile string url  string fullPathWhereToSave  int timeoutInMilliSec                return new FileDownloader url  fullPathWhereToSave  StartDownload timeoutInMilliSec             Usage   static void Main string   args        var success   FileDownloader DownloadFile fileUrl  fullPathWhereToSave  timeoutInMilliSec       Console WriteLine  Done  - success      success       Console ReadLine

User · Answer

As per my research I found that WebClient DownloadFileAsync is the best way to download file  It is available in System Net namespace and it supports  net core as well   Here is the sample code to download the file   using System  using System IO  using System Net  using System ComponentModel   public class Program       public static void Main                 new Program   Download  ftp   localhost test zip              public void Download string remoteUri                string FilePath   Directory GetCurrentDirectory       tepdownload     Path GetFileName remoteUri      path where download file to be saved  with filename  here I have taken file name from supplied remote url         using  WebClient client   new WebClient                          try                               if   Directory Exists  tepdownload                                          Directory CreateDirectory  tepdownload                                      Uri uri   new Uri remoteUri                     password username of your file server eg  ftp username and password                 client Credentials   new NetworkCredential  username    password                      delegate method  which will be called after file download has been complete                  client DownloadFileCompleted    new AsyncCompletedEventHandler Extract                     delegate method for progress notification handler                  client DownloadProgressChanged    new DownloadProgressChangedEventHandler ProgessChanged                      uri is the remote url where filed needs to be downloaded  and FilePath is the location where file to be saved                 client DownloadFileAsync uri  FilePath                             catch  Exception                                throw                                    public void Extract object sender  AsyncCompletedEventArgs e                Console WriteLine  File has been downloaded               public void ProgessChanged object sender  DownloadProgressChangedEventArgs e                Console WriteLine   Download status   e ProgressPercentage                 With above code file will be downloaded inside tepdownload folder of the project s directory  Please read comment in code to understand what above code do

User · Answer

using System Net   WebClient webClient   new WebClient    webClient DownloadFile  http   mysite com myfile txt     c  myfile txt

User · Answer

Check for a network connection using GetIsNetworkAvailable   to avoid creating empty files when not connected to a network   if  System Net NetworkInformation NetworkInterface GetIsNetworkAvailable          using  System Net WebClient client   new System Net WebClient                                            client DownloadFileAsync new Uri  http   www examplesite com test txt               D   test txt

User · Answer

Complete class to download a file while printing status to console   using System  using System ComponentModel  using System IO  using System Net  using System Threading   class FileDownloader       private readonly string  url      private readonly string  fullPathWhereToSave      private bool  result   false      private readonly SemaphoreSlim  semaphore   new SemaphoreSlim 0        public FileDownloader string url  string fullPathWhereToSave                if  string IsNullOrEmpty url   throw new ArgumentNullException  url            if  string IsNullOrEmpty fullPathWhereToSave   throw new ArgumentNullException  fullPathWhereToSave             this  url   url          this  fullPathWhereToSave   fullPathWhereToSave             public bool StartDownload int timeout                try                       System IO Directory CreateDirectory Path GetDirectoryName  fullPathWhereToSave                 if  File Exists  fullPathWhereToSave                                 File Delete  fullPathWhereToSave                             using  WebClient client   new WebClient                                  var ur   new Uri  url                      client Credentials   new NetworkCredential  username    password                    client DownloadProgressChanged    WebClientDownloadProgressChanged                  client DownloadFileCompleted    WebClientDownloadCompleted                  Console WriteLine   Downloading file                     client DownloadFileAsync ur   fullPathWhereToSave                    semaphore Wait timeout                   return  result  amp  amp  File Exists  fullPathWhereToSave                                   catch  Exception e                        Console WriteLine  Was not able to download file                 Console Write e               return false                    finally                       this  semaphore Dispose                         private void WebClientDownloadProgressChanged object sender  DownloadProgressChangedEventArgs e                Console Write   r     -- gt      0      e ProgressPercentage              private void WebClientDownloadCompleted object sender  AsyncCompletedEventArgs args                 result    args Cancelled          if    result                        Console Write args Error ToString                       Console WriteLine Environment NewLine    Download finished              semaphore Release               public static bool DownloadFile string url  string fullPathWhereToSave  int timeoutInMilliSec                return new FileDownloader url  fullPathWhereToSave  StartDownload timeoutInMilliSec             Usage   static void Main string   args        var success   FileDownloader DownloadFile fileUrl  fullPathWhereToSave  timeoutInMilliSec       Console WriteLine  Done  - success      success       Console ReadLine

User · Answer

Use System Net WebClient DownloadFile   string remoteUri    http   www contoso com library homepage images    string fileName    ms-banner gif   myStringWebResource   null      Create a new WebClient instance  using  WebClient myWebClient   new WebClient          myStringWebResource   remoteUri   fileName         Download the Web resource and save it into the current filesystem folder      myWebClient DownloadFile myStringWebResource  fileName

User · Answer

Include this namespace  using System Net    Download Asynchronously and put a ProgressBar to show the status of the download within the UI Thread Itself  private void BtnDownload Click object sender  RoutedEventArgs e        using  WebClient wc   new WebClient                  wc DownloadProgressChanged    wc DownloadProgressChanged          wc DownloadFileAsync                  Param1   Link of file             new System Uri  http   www sayka com downloads front view jpg                   Param2   Path to save              D   Images  front view jpg                        Event to track the progress void wc DownloadProgressChanged object sender  DownloadProgressChangedEventArgs e        progressBar Value   e ProgressPercentage

User · Answer

using System Net   WebClient webClient   new WebClient    webClient DownloadFile  http   mysite com myfile txt     c  myfile txt

User · Answer

As per my research I found that WebClient DownloadFileAsync is the best way to download file  It is available in System Net namespace and it supports  net core as well   Here is the sample code to download the file   using System  using System IO  using System Net  using System ComponentModel   public class Program       public static void Main                 new Program   Download  ftp   localhost test zip              public void Download string remoteUri                string FilePath   Directory GetCurrentDirectory       tepdownload     Path GetFileName remoteUri      path where download file to be saved  with filename  here I have taken file name from supplied remote url         using  WebClient client   new WebClient                          try                               if   Directory Exists  tepdownload                                          Directory CreateDirectory  tepdownload                                      Uri uri   new Uri remoteUri                     password username of your file server eg  ftp username and password                 client Credentials   new NetworkCredential  username    password                      delegate method  which will be called after file download has been complete                  client DownloadFileCompleted    new AsyncCompletedEventHandler Extract                     delegate method for progress notification handler                  client DownloadProgressChanged    new DownloadProgressChangedEventHandler ProgessChanged                      uri is the remote url where filed needs to be downloaded  and FilePath is the location where file to be saved                 client DownloadFileAsync uri  FilePath                             catch  Exception                                throw                                    public void Extract object sender  AsyncCompletedEventArgs e                Console WriteLine  File has been downloaded               public void ProgessChanged object sender  DownloadProgressChangedEventArgs e                Console WriteLine   Download status   e ProgressPercentage                 With above code file will be downloaded inside tepdownload folder of the project s directory  Please read comment in code to understand what above code do

User · Answer

Below code contain logic for download file with original name   private string DownloadFile string url                 HttpWebRequest request    HttpWebRequest HttpWebRequest Create url           string filename               string destinationpath   Environment          if   Directory Exists destinationpath                         Directory CreateDirectory destinationpath                     using  HttpWebResponse response    HttpWebResponse request GetResponseAsync   Result                        string path   response Headers  Content-Disposition                if  string IsNullOrWhiteSpace path                                 var uri   new Uri url                   filename   Path GetFileName uri LocalPath                             else                               ContentDisposition contentDisposition   new ContentDisposition path                   filename   contentDisposition FileName                              var responseStream   response GetResponseStream                using  var fileStream   File Create System IO Path Combine destinationpath  filename                                  responseStream CopyTo fileStream                                    return Path Combine destinationpath  filename

User · Answer

using  var client   new WebClient          client DownloadFile  http   example com file song a mpeg    a mpeg

User · Answer

using  var client   new WebClient          client DownloadFile  http   example com file song a mpeg    a mpeg

User · Answer

using  var client   new WebClient          client DownloadFile  http   example com file song a mpeg    a mpeg

User · Answer

Use System Net WebClient DownloadFile   string remoteUri    http   www contoso com library homepage images    string fileName    ms-banner gif   myStringWebResource   null      Create a new WebClient instance  using  WebClient myWebClient   new WebClient          myStringWebResource   remoteUri   fileName         Download the Web resource and save it into the current filesystem folder      myWebClient DownloadFile myStringWebResource  fileName

User · Answer

You may need to know the status and update a ProgressBar during the file download or use credentials before making the request   Here it is  an example that covers these options  Lambda notation and String interpolation has been used   using System Net          using  WebClient client   new WebClient          Uri ur   new Uri  http   remotehost do images img jpg           client Credentials   new NetworkCredential  username    password        String credentials   Convert ToBase64String Encoding ASCII GetBytes  Username           MyNewPassword         client Headers HttpRequestHeader Authorization      Basic  credentials         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                 client DownloadFileAsync ur    C  path newImage jpg

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

You may need to know the status and update a ProgressBar during the file download or use credentials before making the request   Here it is  an example that covers these options  Lambda notation and String interpolation has been used   using System Net          using  WebClient client   new WebClient          Uri ur   new Uri  http   remotehost do images img jpg           client Credentials   new NetworkCredential  username    password        String credentials   Convert ToBase64String Encoding ASCII GetBytes  Username           MyNewPassword         client Headers HttpRequestHeader Authorization      Basic  credentials         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                 client DownloadFileAsync ur    C  path newImage jpg

User · Answer

Try using this   private void downloadFile string url         string file   System IO Path GetFileName url        WebClient cln   new WebClient         cln DownloadFile url  file

User · Answer

using  var client   new WebClient          client DownloadFile  http   example com file song a mpeg    a mpeg

User · Answer

Use System Net WebClient DownloadFile   string remoteUri    http   www contoso com library homepage images    string fileName    ms-banner gif   myStringWebResource   null      Create a new WebClient instance  using  WebClient myWebClient   new WebClient          myStringWebResource   remoteUri   fileName         Download the Web resource and save it into the current filesystem folder      myWebClient DownloadFile myStringWebResource  fileName

User · Answer

Below code contain logic for download file with original name   private string DownloadFile string url                 HttpWebRequest request    HttpWebRequest HttpWebRequest Create url           string filename               string destinationpath   Environment          if   Directory Exists destinationpath                         Directory CreateDirectory destinationpath                     using  HttpWebResponse response    HttpWebResponse request GetResponseAsync   Result                        string path   response Headers  Content-Disposition                if  string IsNullOrWhiteSpace path                                 var uri   new Uri url                   filename   Path GetFileName uri LocalPath                             else                               ContentDisposition contentDisposition   new ContentDisposition path                   filename   contentDisposition FileName                              var responseStream   response GetResponseStream                using  var fileStream   File Create System IO Path Combine destinationpath  filename                                  responseStream CopyTo fileStream                                    return Path Combine destinationpath  filename

User · Answer

Try using this   private void downloadFile string url         string file   System IO Path GetFileName url        WebClient cln   new WebClient         cln DownloadFile url  file

User · Answer

Check for a network connection using GetIsNetworkAvailable   to avoid creating empty files when not connected to a network   if  System Net NetworkInformation NetworkInterface GetIsNetworkAvailable          using  System Net WebClient client   new System Net WebClient                                            client DownloadFileAsync new Uri  http   www examplesite com test txt               D   test txt

User · Answer

Use System Net WebClient DownloadFile   string remoteUri    http   www contoso com library homepage images    string fileName    ms-banner gif   myStringWebResource   null      Create a new WebClient instance  using  WebClient myWebClient   new WebClient          myStringWebResource   remoteUri   fileName         Download the Web resource and save it into the current filesystem folder      myWebClient DownloadFile myStringWebResource  fileName

User · Answer

Include this namespace  using System Net    Download Asynchronously and put a ProgressBar to show the status of the download within the UI Thread Itself  private void BtnDownload Click object sender  RoutedEventArgs e        using  WebClient wc   new WebClient                  wc DownloadProgressChanged    wc DownloadProgressChanged          wc DownloadFileAsync                  Param1   Link of file             new System Uri  http   www sayka com downloads front view jpg                   Param2   Path to save              D   Images  front view jpg                        Event to track the progress void wc DownloadProgressChanged object sender  DownloadProgressChangedEventArgs e        progressBar Value   e ProgressPercentage

[c#] How to download a file from a URL in C#?

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