Is Close() method of WPF is enough?

Question

Hi All, I have a WPF window, which I had used several components like textBoxes, textBlocks, comboBoxes and buttons. These component's events have been used to get the updated values like TextChanged,SelectionChanged, Click events. I read several articles regarding removing of the resources by calling the Close() method of WPF. But, will it clear every hooked up event's resources also? If not, should I implement a method to Un-hook these events? Kindly share your ideas! Thanks & Regards, Amresh S.

Amit Gupta · Answer

@Amresh As the version of. NET Framwork increases , classes on it adopts vast changes to manage the resources , developers of wpf had allmost remove all the burden of disposing the resources all the time as we faced it in windows form. The classes are purely managed and avoid memory leak and other type of problems. You have also noticed that wpf is much faster than windows form, the reason that windows form works on GDI+ whereas WPF works on directX which enhance the performance issue. Yes, close () will do all the stuff and that is more than enough for releasing the resources.

Amit Gupta · Answer

Revoking event handlers is just opposite of applying. canvas1 . MouseDown += onMouseDown ; and you can remove the eventhandler again: canvas1 . MouseDown -= onMouseDown ; Moreover, if you want to cleanup tge resources used by a control, you can pass null. myCanvas =null; Thats it. Do let me know if you require any assistance

Praveen Gopal · Answer

ResourceDictionary rd = new ResourceDictionary (); rd . Source = new Uri ( @"pack://application:,,,/WpfApplication1;component/Dictionary" + dic + ".xaml" ); this . Resources . Clear (); this . Resources = rd ; Hope it helps.

Praveen Gopal · Answer

private void Clear_button_Click(object sender, RoutedEventArgs e) { LoadedFiles_listBox.Items.Clear(); } I did like this May be it helps

Amresh S · Answer

Hi @Amit, Thank you for your response. I aware of the way to revoke the event handler, but in Winforms we need can implement a Dispose() method, so that the resources and memory leaks can be avoided. While in WPF, it is stated that, just the Close() method of a window is enough to clear all the resources used by invoking event handlers. My point is that "whether it could avoid Memory leaks or not". If so, I have to trigger a custom dispose method, by some specific scenario to do it. Ofcourse, I will implement the code for revoking the event handler in the same way. Hope I had explained my scenario well. Regards, Amresh S.

Praveen Gopal · Answer

When you need to clean the resource by clicking botton or when?

Amresh S · Answer

Hi Praveen, Yes, I like to clean-up the resources being used by the components in the window. Regards, Amresh S.

Praveen Gopal · Answer

Amresh: If i understand properly...you are willing to clearing the resource or ??