Getting the ALV Configuration Model List Viewer in Web Dynpro for ABAP

To make the ALV configuration model available, you use, for example, a method from class IWCI_SALV_WD_TABLE in WDDOINIT. You choose one of the following methods:
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● GET_MODEL

The system returns a complete ALV configuration model with all column objects and field objects.

This is the default variant. The method does not have any parameters.

● GET_MODEL_EXTENDED
The system returns all field objects (as above), but only returns column objects when required.
If, for example, you want to manage a large number of field objects but you only want to display a few columns, create the field objects first and later generate the column objects you require to display the content.

Parameter S_PARAM from method GET_MODEL_EXTENDED (type IF_SALV_WD_TABLE=>S_TYPE_PARAM_GET_MODEL) consists of the DEFAULT_COLUMNS field: This enables you to specify whether the column objects are to be generated or not.

You now have all the objects needed to configure the ALV output as required.

You can specify a new internal data table for the ALV output at a later stage. To do this, use method SET_DATA. However, by using this method you also automatically delete the entire ALV configuration model with all fields and column objects. To make the configuration model available again to the new data table, use method GET_MODEL or method GET_MODEL_EXTENDED.