Updating textbox asynchronously
This is because the UI is operating on a different thread to the thread handling the timer event. w=300" data-large-file="https://stephenhaunts.files.wordpress.com/2015/06/exception.jpg? Invoke( Action ) method to make the call to the UI thread. We have a timer being setup with an event (On Timed Event) being fired every 5 seconds.
Thread Exception " data-medium-file="https://stephenhaunts.files.wordpress.com/2015/06/exception.jpg? When the On Timed Event is called, the UI is updated inside the Dispatcher. In WPF, only the thread that created a Dispatcher Object may access that object.
Before you begin this tutorial, you should have a solid base knowledge of all C#'s fundamental concepts, and have at least a general knowledge of the different API's available for performing multithreaded and asynchronous operations in C#.
The examples are kept very very simple, but basic knowledge is still required So, what has brought this on?
This would mean that the operation knows nothing of the UI, making the program more maintainable, and the operation itself reusable in the future.
Alternatively, you could make your progress type immutable and make your own copies.
Now let’s look at the “receiving” side of progress reports.
Despite this, the general patterns still apply even if you do not use a separate class to encapsulate the work, although I would argue that it is a good idea to use a separate class for any meaningful operation.
Moving on, the tutorial will build on this tutorial, but will introduce new techniques, of which aren't tightly coupled to the Win Forms technology.