private ICommand CreateRoutingCommand()
{
if (Command != null && MultipleCommand != null)
{
var command = new DelegateCommand <object>(o =>
{
if (o is TItem item)
{
Command.Execute(item);
}
else if (o is IList list)
{
if (list.Count == 1)
{
Command.Execute(list.Cast <TItem>().Single());
}
else
{
MultipleCommand.Execute(list.Cast <TItem>().ToList());
}
}
}, o =>
{
if (o is TItem item)
{
return(Command.CanExecute(item));
}
if (o is IList list)
{
if (list.Count == 1)
{
return(Command.CanExecute(list.Cast <TItem>().Single()));
}
else
{
return(MultipleCommand.CanExecute(list.Cast <TItem>().ToList()));
}
}
return(true);
});
Command.CanExecuteChanged += (sender, args) => command.RaiseCanExecuteChanged();
MultipleCommand.CanExecuteChanged += (sender, args) => command.RaiseCanExecuteChanged();
return(command);
}
if (MultipleCommand != null)
{
var command = new DelegateCommand <IList>(list => MultipleCommand.Execute(list.Cast <TItem>().ToList()),
list => MultipleCommand.CanExecute(list.Cast <TItem>().ToList()));
MultipleCommand.CanExecuteChanged += (sender, args) => command.RaiseCanExecuteChanged();
return(command);
}
return(Command);
}
private ICommand CreateRoutingCommand()
{
if (Command != null && MultipleCommand != null)
{
ContextAwareDelegateCommand <object> command = null;
command = new ContextAwareDelegateCommand <object>(o =>
{
if (o is TItem item)
{
Command.Execute(item, (TContext)command.Context);
}
else if (o is IList list)
{
if (list.Count == 1)
{
Command.Execute(list.Cast <TItem>().Single(), (TContext)command.Context);
}
else
{
MultipleCommand.Execute(list.Cast <TItemBase>(), (TContext)command.Context);
}
}
}, o =>
{
if (o is TItem item)
{
return(Command.CanExecute(item, (TContext)command.Context));
}
if (o is IList list)
{
if (list.Count == 1)
{
return(Command.CanExecute(list.Cast <TItem>().Single(), (TContext)command.Context));
}
else
{
return(MultipleCommand.CanExecute(list.Cast <TItemBase>(), (TContext)command.Context));
}
}
return(true);
});
Command.CanExecuteChanged += (sender, args) => command.RaiseCanExecuteChanged();
MultipleCommand.CanExecuteChanged += (sender, args) => command.RaiseCanExecuteChanged();
return(command);
}
if (MultipleCommand != null)
{
ContextAwareDelegateCommand <IList> command = null;
command = new ContextAwareDelegateCommand <IList>(
list => MultipleCommand.Execute(list.Cast <TItemBase>(), (TContext)command.Context),
list => MultipleCommand.CanExecute(list.Cast <TItemBase>(), (TContext)command.Context));
MultipleCommand.CanExecuteChanged += (sender, args) => command.RaiseCanExecuteChanged();
return(command);
}
else
{
ContextAwareDelegateCommand <object> command = null;
command = new ContextAwareDelegateCommand <object>(
o => Command.Execute((TItem)o, (TContext)command.Context),
o => Command.CanExecute((TItem)o, (TContext)command.Context));
return(command);
}
}
private void button8_Click(object sender, EventArgs e)
{
MultipleCommand.ResetText();
}