/// <summary>
/// Initializes a new instance of the <see cref="RelayCommand<PingUIOperations>"/> class.
/// </summary>
/// <param name="operationId">The operation id.</param>
/// <param name="canExecute">The can execute method. use <c>null</c> to skip the check.</param>
/// <param name="beginExecute">The begin execute method. Method that should be called when execution
/// completed should be specified in the <see cref="IAsyncCallContext.EndCall"/> inside the <c>beginExecute</c>.</param>
public RelayCommand(UIOperations operationId, BeginAsyncOperationAction beginExecute, Predicate <object> canExecute)
{
this._operationId = operationId;
this._canExecute = canExecute;
this._execute = (prm) => {
this.IsExecuting = null !=
beginExecute(this._asyncContext = new WinAsyncCallContext(this.OperationId, prm), EndAsyncOperation);
};
}
/// <summary>
/// Initializes a new instance of the <see cref="RelayCommand"/> class.
/// </summary>
/// <param name="execute">The delegate to execute.</param>
/// <param name="canExecute">The delegate to verify if command can be executed.</param>
public RelayCommand(UIOperations operationId, Action <object> execute, Predicate <object> canExecute)
{
this._operationId = operationId;
if (execute == null)
{
throw new ArgumentNullException("execute", "Delegate 'execute' not specified in the constructor for operationId " + operationId.ToString());
}
_execute = execute;
_canExecute = canExecute;
}
protected async override void OnNavigatedFrom(NavigationEventArgs e)
{
try
{
Connection.instance.isConnectionChangedEvent -= ControllerPage_ConnectionChangedEvent;
base.OnNavigatedTo(e);
await UninitializeVideoFeedModule();
await UninitAsync();
}
catch (Exception ex)
{
UIOperations.ShowContentDialog("ControllerPage OnNavigatedFrom Error", ex.ToString());
}
}
/// <summary>
/// Initializes a new instance of the <see cref="RelayCommand"/> class.
/// </summary>
/// <param name="execute">The delegate to execute.</param>
public RelayCommand(UIOperations operationId, Action <object> execute)
: this(operationId, execute, null)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="ActionRequest"/> class.
/// </summary>
/// <param name="operationId">The operation id.</param>
/// <param name="subject">The subject.</param>
public ActionRequest(UIOperations operationId, object subject)
{
this.OperationId = operationId;
this.Subject = subject;
}
