relaycommand

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How does WPF determine when to Invalidate using the CommandManager (CommandManager.InvalidateRequerySuggested)?

I\'ve been using the RelayCommand a bit here and there, and it got me to wonder and want to know... when exactly does the CommandManager.InvalidateRequerySuggested() get called by WPF?[详细]

2023-04-11 12:45 分类：问答
Why use a RelayCommand or DelegateCommand instead of just implementing ICommand?

I\'m just learning about MVVM in WPF, I\'m completely new both to WPF as to MVVM (I understand how it works, but have never used it...)[详细]

2023-04-04 18:23 分类：问答
Are there any performance implications with CanExecuteCommand?

What are the performance implications of us开发者_Python百科ing the CanExecuteCommand of the ICommand object. Is the method executed over and over again?[详细]

2023-04-03 19:11 分类：问答
How or when to cleanup RelayCommand objects in WPF/MVVM?

I am using the standard Josh Smith implementation of RelayCommand to implement ICommands in my WPF/MVVM application. See: WPF Apps with the MVVM Design Pattern[详细]

2023-03-30 17:45 分类：问答
Why is my ContextMenu item bound to a RelayCommand is always disabled?

I\'m working on my first big WPF MVVM application now, which uses MVVM Light Toolkit in combination with Josh Smith\'s RelayCommand.[详细]

2023-03-29 11:03 分类：问答
RelayCommand RaiseCanExecuteChanged() fails

I am using a couple of Buttons bound to RelayCommands initialized with CanExecute delegates. RelayCommand DeleteCommand;[详细]

2023-03-25 07:03 分类：问答
MVVM Relay Command does not fire in Silverlight RIA app

I am developing a Silverlight 4 RIA (Entity framework) application and I am having issues using a MVVMLight RelayCommand. I have used them before without problem but there seems to be an issue after I[详细]

2023-03-23 18:49 分类：问答
Silverlight UserControl in MVVM with RelayCommand<T> - example?

Has somebody a good example to create a UserControl, and then bind commands to it? My problem is to forward the command to a control in the UserControl, for example to a TreeView\'s Drop event. It\'s[详细]

2023-03-20 05:21 分类：问答
Why are RelayCommand or DelegateCommand not part of WPF? [closed]

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references,or expertise, but this question will likely solicit debate, a[详细]

2023-03-15 16:55 分类：问答
"specified cast is not valid" GalaSoft.MvvmLight.Command.RelayCommand`1.Execute(Object parameter)

I\'m pretty new to using MVVM Light so hopefully this is a simple fix, although I have spent most of the day trying to track down an answer :-([详细]

2023-03-15 04:10 分类：问答