WinForm download file and display download progress sample
| The code is as follows |
Copy Code |
| <summary>
Show progress
</summary>
<param name= "Val" ></param>
private void Progressbar_value (int val)
{
progressBar1.Value = val;
Label1. Text = val. ToString () + "%";
} <summary>
Download files
</summary>
<param name= "url" ></param>
<param name= "SaveFile" ></param>
<param name= "DownloadProgressChanged" ></param>
<param name= "downloadfilecompleted" ></param>
private void DownloadFile (string url, string savefile, action<int> downloadprogresschanged, Action downloadfilecompleted)
{
WebClient client = new WebClient ();
if (downloadprogresschanged!= null)
{
Client. DownloadProgressChanged + = Delegate (object sender, DownloadProgressChangedEventArgs e)
{
This. Invoke (downloadprogresschanged, e.progresspercentage);
};
}
if (downloadfilecompleted!= null)
{
Client. downloadfilecompleted + = Delegate (object sender, AsyncCompletedEventArgs e)
{
This. Invoke (downloadfilecompleted);
};
}
Client. DownloadFileAsync (new Uri (URL), savefile);
}
delegate void Action (); . NET Framework 2.0 Custom Delegate action ///<summary>
///Click to download
///</summary>
///<param name= "sender" ></PARAM>
///& Lt;param name= "E" ></param>
private void Button1_Click (object sender, EventArgs e)
{
& nbsp DownloadFile ("Http://www.111cn.net/update.zip", @ "F:update.zip", progressbar_value, NULL);
} |
