How to download a file from a website in C# [closed]

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");

Use WebClient.DownloadFile:

using (WebClient client = new WebClient()){    client.DownloadFile("http://csharpindepth.com/Reviews.aspx",                         @"c:\Users\Jon\Test\foo.txt");}

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(() => {        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(() => {        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) =>{    Console.WriteLine("Download status: {0}%.", e.ProgressPercentage);    // updating the UI    Dispatcher.Invoke(() => {        progressBar.Value = e.ProgressPercentage;    });};client.DownloadDataCompleted += (object sender, DownloadDataCompletedEventArgs e) => {    Console.WriteLine("Download finished!");};

(Ver 4) - Or

client.DownloadProgressChanged += (o, e) =>{    Console.WriteLine($"Download status: {e.ProgressPercentage}%.");    // updating the UI    Dispatcher.Invoke(() => {        progressBar.Value = e.ProgressPercentage;    });};client.DownloadDataCompleted += (o, e) => {    Console.WriteLine("Download finished!");};