createAsync method
Creates a RxCommand for an asynchronous handler function with no parameter and no return type
action
: handler function
canExecute
: observable that can bve used to enable/diable the command based on some other state change
if omitted the command can be executed always except it's already executing
isExecuting will issue a bool
value on each state change. Even if you
subscribe to a newly created command it will issue false
For the Observable<CommandResult>
that RxCommand implement this normally doesn't make sense
if you want to get an initial Result with data==null, error==null, isExceuting==false
pass
emitInitialCommandResult=true
.
Implementation
/// [isExecuting] will issue a `bool` value on each state change. Even if you
/// subscribe to a newly created command it will issue `false`
/// For the `Observable<CommandResult>` that [RxCommand] implement this normally doesn't make sense
/// if you want to get an initial Result with `data==null, error==null, isExceuting==false` pass
/// [emitInitialCommandResult=true].
static RxCommand<Null, Null> createAsync(AsyncAction action,{Observable<bool> canExecute, bool emitInitialCommandResult = false})
{
return new RxCommandAsync<Null,Null>((_) { action(); return null;},canExecute,emitInitialCommandResult);
}