Wpf canexecute not updating


03-Aug-2020 22:26

wpf canexecute not updating-43

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I have try to switch Is Edited = False; after the data load but it's not work...

Can Execute Changed is invoked when changes occur that can change whether or not the command can be executed.

In fact, we could have avoided all of the Code-behind in the previous example, because a WPF Text Box can automatically handle common commands like Cut, Copy, Paste, Undo and Redo.

WPF does this by handling the Executed and Can Execute events for you, when a text input control like the Text Box has focus.

A very common example of this is the toggling of buttons for using the Windows Clipboard, where you want the Cut and Copy buttons to be enabled only when text is selected, and the Paste button to only be enabled when text is present in the clipboard.

wpf canexecute not updating-13

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If it returns false the button will be disabled on the interface. With a simple implementation of ICommand I can create the following: However this does not allow me to have a different logic to my Can Execute or Execute.

Hello, I only want that my update button is active if entries are edited AND it's not the first load.

When i go on my page, data is loaded in entries and Is Edited switch to True, result my update button is active.

Then it could be called using the following: The Command Manager.

Requery Suggested handles events when something in the interface suggests that a requery should happen.We'll start off with a very simple example: We define a command binding on the Window, by adding it to its Command Bindings collection.



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