Linkar Clients 2.1.3

You will have one more argument in the function called callback in the persistent functions and in the direct ones , which will be one of the following types:

OperationAsyncCallbackString: A delegate function with two string arguments. strData for data returns or "error" for returning an error.

OperationAsyncCallbackLkData: A delegate function with an LkData argument.

OperationAsyncCallbackClass: A delegate function with two arguments: one List<T> / List(Of T) type called lstRecords that contains the resultant records list or other string type called “error” for returning an error.

Both types of functions are based on a derivate class from the LinkarEventListener interface.

This class must be defined by the programmer.

The interface will force the available callback methods to be defined and the user will decide in which of them he must implement his code, which will be executed when the requested operation finishes.

In the persistent functions, the instance of the derivate class (eventHandler) must be passed to the client object before using any of the asynchronous functions through the addLinkarClientEventListener event.

  client.addLinkarClientEventListener(eventHandler);

In the direct functions you will have to pass an Arraylist as an argument that its unique element is the derivate class instance (eventhandler)

  ArrayList listeners = new ArrayList();

  listeners.add(eventHandler);

  LinkarClt.ReadAsync(listeners, credentialsOptions, filename, recordIDs, dictClause, readOptions, customVars, receivetimeout);