LinkarCltFormatAsync_Text Method

There are two types of methods, depending on the way they are identified by credentials

• Persistents - Exclusively from OOP (OBJECT-ORIENTED PROGRAMMING) and allow the creation of a LinkarClt object that manages all the operations.

  After creating the object, it is necessary to Login that, through a Session code; this allows it to make all the desired operations until a call to the Close method is produced or until the session expires because of inactivity. This is defined on its EntryPoint.

  They are useful for applications that require user identification, for instance, to log into an ERP session.

• Directs - Used for direct and independent communication with the database.

  Its arguments contain the necessary information to identify the user before returning the required information.

  Unlike persistent functions, these do not have a Session Code, each call is completely independent of the others and does not have Login or Close functions.

  They are used for database access from public websites, for instance online shops.

These types of calls are executed in another thread background; the client keeps operating.

A callback is required once the operation is finished, in order to return the data to the client.

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<T> - 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