[greench]

AxaptaWrapper axSession = SessionManager.GetSession();
DataTable dtQueryBind = new DataTable();
Guid guid = System.Guid.NewGuid();
        //Fills in temporary storage in AX with data that is used by query
axSession.CallStaticClassMethod("HelpClass", "fillTable", new object[] {_fromDate, _toDate, guid });

Ну а потом дергаете Query, которая заполнит ваш DataTable