createAsync<TParam, TResult> method

RxCommand<TParam, TResult> createAsync <TParam, TResult>(
  1. AsyncFunc1<TParam, TResult> func,
  2. {Stream<bool> canExecute,
  3. bool emitInitialCommandResult: false,
  4. bool emitLastResult: false,
  5. bool emitsLastValueToNewSubscriptions: false,
  6. TResult initialLastResult}
)

Creates a RxCommand for an asynchronous handler function with parameter that returns a value func: handler function canExecute : observable that can be used to enable/disable 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 publishes in results this normally doesn't make sense if you want to get an initial Result with data==null, error==null, isExecuting==false pass emitInitialCommandResult=true. emitLastResult will include the value of the last successful execution in all CommandResult events unless there is no result. By default the results Observable and the RxCommand itself behave like a PublishSubject. If you want that it acts like a BehaviourSubject, meaning every listener gets the last received value, you can set emitsLastValueToNewSubscriptions = true. initialLastResult sets the value of the lastResult property before the first item was received. This is helpful if you use lastResult as initialData of a StreamBuilder

Implementation

static RxCommand<TParam, TResult> createAsync<TParam, TResult>(
    AsyncFunc1<TParam, TResult> func,
    {Stream<bool> canExecute,
    bool emitInitialCommandResult = false,
    bool emitLastResult = false,
    bool emitsLastValueToNewSubscriptions = false,
    TResult initialLastResult}) {
  return RxCommandAsync<TParam, TResult>(
      (x) async => func(x),
      canExecute,
      emitInitialCommandResult,
      emitLastResult,
      emitsLastValueToNewSubscriptions,
      initialLastResult);
}