I would like to ask, is it possible to pass string value from view (xaml) to property in ViewModel?
I have Two tabs. First is "Process" and the second is "Non-Process". Depends on that string value RelayCommand will execute and fire method with DispatcherTimer (if Process then Dispatcher1, if Non-Process then Dispatcher2).
xaml:
<i:Interaction.Triggers>
<i:EventTrigger EventName="PreviewMouseDown" >
<cmd:EventToCommand Command="{Binding EmployeeViewM.MeasurementEndExecution}"/>
</i:EventTrigger>
</i:Interaction.Triggers>
Can I use CommandParameter and CommandParameterValue to pass that string to the property?
Thank you for any suggestion
Yes you can, like below:
<i:Interaction.Triggers>
<i:EventTrigger EventName="PreviewMouseDown" >
<cmd:EventToCommand Command="{Binding EmployeeViewM.MeasurementEndExecution}" CommandParameter="Process"/>
</i:EventTrigger>
</i:Interaction.Triggers>
And/OR
<i:Interaction.Triggers>
<i:EventTrigger EventName="PreviewMouseDown" >
<cmd:EventToCommand Command="{Binding EmployeeViewM.MeasurementEndExecution}" CommandParameter="Non-Process"/>
</i:EventTrigger>
</i:Interaction.Triggers>
Hopefully your RelayCommand
(or ICommand
implementation) is already accepting CommandParameter
. Like below.
public class RelayCommand : ICommand
{
#region Fields
readonly Action<object> _execute;
readonly Predicate<object> _canExecute;
#endregion // Fields
#region Constructors
/// <summary>
/// Creates a new command that can always execute.
/// </summary>
/// <param name="execute">The execution logic.</param>
public RelayCommand(Action<object> execute)
: this(execute, null)
{
}
/// <summary>
/// Creates a new command.
/// </summary>
/// <param name="execute">The execution logic.</param>
/// <param name="canExecute">The execution status logic.</param>
public RelayCommand(Action<object> execute, Predicate<object> canExecute)
{
if (execute == null)
throw new ArgumentNullException("execute");
_execute = execute;
_canExecute = canExecute;
}
#endregion // Constructors
#region ICommand Members
public bool CanExecute(object parameter)
{
return _canExecute == null ? true : _canExecute(parameter);
}
public event EventHandler CanExecuteChanged
{
add { CommandManager.RequerySuggested += value; }
remove { CommandManager.RequerySuggested -= value; }
}
public void Execute(object parameter)
{
_execute(parameter);
}
#endregion // ICommand Members
}
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