How to Introduce Delays in WPF Operations Without Blocking the UI?

Introducing Delays in WPF Operations

Your objective of implementing a delay before navigating to a subsequent window can be achieved through several approaches in WPF.

Problem Overview:

Using Thread.Sleep to suspend the thread before navigating leads to UI blocking, causing the UI element to be briefly displayed before the navigation occurs.

Solution:

To avoid thread blocking, you should utilize asynchronous waiting techniques such as dispatcher timers or Task.Delay.

Method 1: DispatcherTimer

Create a timer with a 2-second interval and add a Tick event handler that will stop the timer and display the second page when the interval elapses:

tbkLabel.Text = "two seconds delay";

var timer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(2) };
timer.Start();
timer.Tick += (sender, args) =>
{
    timer.Stop();
    var page = new Page2();
    page.Show();
};

Method 2: Task.Delay

Use Task.Delay to suspend the asynchronous operation for 2 seconds and then display the next page:

tbkLabel.Text = "two seconds delay";

Task.Delay(2000).ContinueWith(_ =>
{
    var page = new Page2();
    page.Show();
});

Method 3: Async/Await (for .NET 4.5 and Above)

Employ async/await to achieve asynchronous waiting within the method and avoid thread blocking:

public async void TheEnclosingMethod()
{
    tbkLabel.Text = "two seconds delay";

    await Task.Delay(2000);
    var page = new Page2();
    page.Show();
}

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