This code snippet is from Stephen Cleary's blog and gives an example of how to report progress when using Task.Run. I would like to know why there are no cross thread issues with updating the UI, by which I mean why is invoke not required?
private async void button2_Click(object sender, EventArgs e)
{
var progressHandler = new Progress<string>(value =>
{
label2.Text = value;
});
var progress = progressHandler as IProgress<string>;
await Task.Run(() =>
{
for (int i = 0; i != 100; ++i)
{
if (progress != null)
progress.Report("Stage " + i);
Thread.Sleep(100);
}
});
label2.Text = "Completed.";
}
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