Đoạn code này sử dụng để down một file trên internet
/// <summary>
/// Function to download a file from URL and save it to local drive
/// </summary>
/// <param name="_URL">URL address to download file</param>
public void DownloadFile(string _URL, string _SaveAs)
{
try
{
System.Net.WebClient _WebClient = new System.Net.WebClient();
// Downloads the resource with the specified URI to a local file.
_WebClient.DownloadFile(_URL, _SaveAs);
}
catch (Exception _Exception)
{
// Error
Console.WriteLine("Exception caught in process: {0}", _Exception.ToString());
}
}
Sử dụng
DownloadFile("http://www.yourdomain.com/sample-file.zip", @"C:\sample-file.zip");
Sử dụng tiếp tính down load
// Occurs when an asynchronous file download operation completes.
private void _DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
{
// File download completed
download_button.Enabled = Enabled;
MessageBox.Show("Download completed");
}
// Occurs when an asynchronous download operation successfully transfers some or all of the data.
private void _DownloadProgressChanged(object sender, System.Net.DownloadProgressChangedEventArgs e)
{
// Update progress bar
progressBar1.Value = e.ProgressPercentage;
}
// download button click event
private void download_button_Click(object sender, EventArgs e)
{
// Disable download button to avoid clicking again while downloading the file
download_button.Enabled = false;
// Downloads, to a local file, the resource with the specified URI.
// This method does not block the calling thread.
System.Net.WebClient _WebClient = new System.Net.WebClient();
_WebClient.DownloadFileCompleted += new AsyncCompletedEventHandler(_DownloadFileCompleted);
_WebClient.DownloadProgressChanged += new System.Net.DownloadProgressChangedEventHandler(_DownloadProgressChanged);
_WebClient.DownloadFileAsync(new Uri("http://www.youdomain.com/sample-file.zip"), @"C:\sample-file.zip");
}