Adding custom routed event of user control to xaml of a window in wpf
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Hi Experts, I am little new to Command binding so this might be a trivial question to many. I know that we can add Command bindings in xaml of a window and give its correspondng property in viewmodel. This viewmodel will be given to the DataContext of the window. Something like the following --app.xaml.cs
mainWindow.DataContext = viewModel;
-- xaml
lt;Button Grid.Row="1" HorizontalAlignment="Right" Margin="0,3,18,3" Name="button1" Width="110"
Command="{Binding LoadCommand}">_Load</Button>-- viewmodel
/// <summary>
/// Gets the load command.
/// </summary>
/// <value>The load command.</value>
public ICommand LoadCommand
{
get
{
if (m_LoadCommand == null)
{
m_LoadCommand = new RelayCommand(param => CanLoad(), param => Load());
}return m\_LoadCommand; } }Here the relaycommand is a class which implements ICommand interface. CanLoad() and Load() are the methods which will get executed for canexecute and execute action of the relaycommand respectively. This is the click event of the button which is handled. I have a user control which has a custom routedevent registered in it and the user control is then used on a window. I am currently adding the event handler explicitly in code.
//hook up event listeners on the actual UserControl instance
this.ucCustomEvent1.CustomClick += new RoutedEventHandler(ucCustomEvent_CustomClick);
//hook up event listeners on the main window (Window1)
this.AddHandler(UserControlThatCreatesEvent.CustomClickEvent, new RoutedEventHandler(ucCustomEvent_CustomClick));I dont want to hook up the routedevent explicitly in code but in the xaml in the similar way as in the button example. I have uploaded the working sample code here for your perusal. Please help! Thanks in advance! Regards, Samar
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Hi Experts, I am little new to Command binding so this might be a trivial question to many. I know that we can add Command bindings in xaml of a window and give its correspondng property in viewmodel. This viewmodel will be given to the DataContext of the window. Something like the following --app.xaml.cs
mainWindow.DataContext = viewModel;
-- xaml
lt;Button Grid.Row="1" HorizontalAlignment="Right" Margin="0,3,18,3" Name="button1" Width="110"
Command="{Binding LoadCommand}">_Load</Button>-- viewmodel
/// <summary>
/// Gets the load command.
/// </summary>
/// <value>The load command.</value>
public ICommand LoadCommand
{
get
{
if (m_LoadCommand == null)
{
m_LoadCommand = new RelayCommand(param => CanLoad(), param => Load());
}return m\_LoadCommand; } }Here the relaycommand is a class which implements ICommand interface. CanLoad() and Load() are the methods which will get executed for canexecute and execute action of the relaycommand respectively. This is the click event of the button which is handled. I have a user control which has a custom routedevent registered in it and the user control is then used on a window. I am currently adding the event handler explicitly in code.
//hook up event listeners on the actual UserControl instance
this.ucCustomEvent1.CustomClick += new RoutedEventHandler(ucCustomEvent_CustomClick);
//hook up event listeners on the main window (Window1)
this.AddHandler(UserControlThatCreatesEvent.CustomClickEvent, new RoutedEventHandler(ucCustomEvent_CustomClick));I dont want to hook up the routedevent explicitly in code but in the xaml in the similar way as in the button example. I have uploaded the working sample code here for your perusal. Please help! Thanks in advance! Regards, Samar
Hi All, I am able to solve this problem of mine. The link given here explain it. Just to keep it brief i did it using something similar to the following lines of code.
<c:MyUserControl local:CommandBehavior.RoutedEventName="MyCustomClick"
local:CommandBehavior.TheCommandToRun="{Binding MyViewModelCommand}"/>CommandBehavior is a class given in the link above. Thanks everyone for giving in your valuable time. Regards, Samar