DataSource or Crosstab --> List of all Members in the current selection

Hey Design Studio Experts,

i need a collection of the  >>current<< member list of a datasource,

Example: i have the Datasource DS_1, which is filtered by 2-3 filters, so the number of lines, that is delivered by the DS_1 is less than the number of lines in the Query of the DS_1.

I have checked already the built-in Methods: getData delivers only a Sting (single value), but i need all members of the current selection.

Thank You in advance.

Alex