f9/sdk/dart/package-fuchsia_services_services/Incoming/connectToService.md

# connectToService<T> method




    *[<Null safety>](https://dart.dev/null-safety)*




void connectToService
&lt;T>([AsyncProxy](../../package-fidl_fidl/AsyncProxy-class.md)&lt;T>? serviceProxy, {String? name})





<p>Connects to the incoming service specified by <code>serviceProxy</code>.</p>
<p>If this object is not bound via the <a href="../../package-fuchsia_services_services/Incoming/request.md">request</a> method before
this method is called an <a href="../../package-fuchsia_services_services/IncomingStateException-class.md">IncomingStateException</a> will be thrown.</p>
<p>If <code>name</code> is specified, it is used as the service name to connect to,
instead of the default name provided by the proxy.</p>



## Implementation

```dart
void connectToService<T>(AsyncProxy<T>? serviceProxy, {String? name}) {
  if (serviceProxy == null) {
    throw ArgumentError.notNull('serviceProxy');
  }
  final String? serviceName = name ?? serviceProxy.ctrl.$serviceName;
  if (serviceName == null) {
    throw Exception(
        "${serviceProxy.ctrl.$interfaceName}'s controller.\$serviceName must "
        'not be null. Check the FIDL file for a missing [Discoverable]');
  }

  // Creates an interface request and binds one of the channels. Binding this
  // channel prior to connecting to the agent allows the developer to make
  // proxy calls without awaiting for the connection to actually establish.
  final serviceProxyRequest = serviceProxy.ctrl.request();

  connectToServiceByNameWithChannel(
      serviceName, serviceProxyRequest.passChannel());
}
```