Xamarin UILabel not updating - xamarin

Question

I've a basic for loop that's basically download files. It's supposed to update the label as long as it progress.
By searching here at Stack Overflow, I found an orientation to use SetNeedsDisplay(). But it's still refuses to update. Any idea ?
for (int i = 0; i < files.Length; i++)
{
status.Text = "Downloading file " + (i + 1) + " of " + files.Length + "...";
status.SetNeedsDisplay();
string remoteFile = assetServer + files[i];
var webClient2 = new WebClient();
string localFile = files[i];
string localPath3 = Path.Combine(documentsPath, localFile);
webClient2.DownloadFile(remoteFile, localPath3);
}

Answer 1

As previously suggested try to avoid blocking the UI when doing heavy transactions in it. WebClient already has a async method which you can use.
webClient2.DownloadFileasync(new System.Uri(remoteFile), localPath3);
and to prevent you from accessing the UI from a different thread use the built-in method InvokeOnMainThread when accessing UI elements.
InvokeOnMainThread (() => {
status.Text = "Downloading file " + (i + 1) + " of " + files.Length + "...";
status.SetNeedsDisplay ();
});
and finally use the using statement to help you with the resources disposal.
using (var webClient2 = new WebClient ())
{
webClient2.DownloadFileAsync (new System.Uri (remoteFile), localPath3);
}
You could also have the iteration inside the using statement this way you don't have to create a WebClient object for each file instead you will use the same object to download all files available in your files array.