/// <summary>
/// This call will block the UI thread... it also shows off the C# yield statement
/// </summary>
private void btnDoWorkNormal_Click(object sender, EventArgs e)
{
txtLog.Clear();
var watch = new Stopwatch();
watch.Start();
// let user know we're working...
statusLabel.Text = "Processing payment...";
// call slow API
var chargeResults = SlowApiCall.ProcessPayment();
// update UI with results
txtLog.AppendText($"Process Payment Results: {chargeResults}{Environment.NewLine}");
statusLabel.Text = "Saving to database...";
// call database with results from API
var dbResults = SlowDatabase.LogCharge(chargeResults);
// update UI
txtLog.AppendText($"Database Results: {dbResults}{Environment.NewLine}");
statusLabel.Text = "DONE!";
txtLog.AppendText($"Done!{Environment.NewLine}{Environment.NewLine}");
watch.Stop();
txtTotalTime.Text = watch.Elapsed.ToString();
}
/// <summary>
/// Example of using async/await to add threading (non-blocking) to our app.
///
/// Can you see how these are basically doing the same thing?
/// </summary>
private async Task DoWorkWithAsync()
{
txtLog.Clear();
var watch = new Stopwatch();
watch.Start();
// let user know we're working...
statusLabel.Text = "Processing payment...";
// call slow API
var chargeResults = await Task.Run(() => SlowApiCall.ProcessPayment());
// update UI with results
txtLog.AppendText($"Process Payment Results: {chargeResults}{Environment.NewLine}");
// let user know we're saving to the database
statusLabel.Text = "Saving to database...";
// call database with results from API
var dbResults = await Task.Run(() => SlowDatabase.LogCharge(chargeResults));
// update UI with results
txtLog.AppendText($"Database Results: {dbResults}{Environment.NewLine}");
statusLabel.Text = "DONE!";
txtLog.AppendText($"Done!{Environment.NewLine}{Environment.NewLine}");
watch.Stop();
txtTotalTime.Text = watch.Elapsed.ToString();
}
private void btnNonBlockedUIManual_Click(object sender, EventArgs e)
{
txtLog.Clear();
var watch = new Stopwatch();
watch.Start();
// let user know we're working...
statusLabel.Text = "Processing payment...";
// call slow API
Task.Run(() => SlowApiCall.ProcessPayment())
.ContinueWith(prevTask =>
{
var chargeResults = prevTask.Result;
AsyncHelper.BeginOnUIThread(() =>
{
// update UI with results
txtLog.AppendText($"Process Payment Results: {chargeResults}{Environment.NewLine}");
// let user know we're working
statusLabel.Text = "Saving to database...";
});
// call database with results from API
return(SlowDatabase.LogCharge(chargeResults));
}).ContinueWith(prevTask =>
{
// call database with results from API
var dbResults = prevTask.Result;
AsyncHelper.BeginOnUIThread(() =>
{
// update UI
txtLog.AppendText($"Database Results: {dbResults}{Environment.NewLine}");
statusLabel.Text = "DONE!";
txtLog.AppendText($"Done!{Environment.NewLine}{Environment.NewLine}");
watch.Stop();
txtTotalTime.Text = watch.Elapsed.ToString();
});
});
}