Data Tier Awareness
Example 135 - Rating: advanced
Example 135 - Rating: advanced
| The Things that Make Up this Example | To Execute this Example |
This form is a simple employee enquiry named VL_SAM135.
What is special about this form is that it is "tier aware".
To make this form tier aware just two special commands are required:
EVTROUTINE handling(#Com_Owner.Initialize);
Change #Std_Obj *Data_Tier;
-------------- This command
ENDROUTINE;
EVTROUTINE handling(#Com_Owner.Closing);
Change #Std_Obj *End_All_Tiers;---------- and this command
ENDROUTINE;
The references to system variables *DATA_TIER in the Initialize event routine and *END_ALL_TIERS in the Closing event routine make this form tier aware (see the source code of this example for more details).
What is special about this form is that it is "tier aware".
To make this form tier aware just two special commands are required:
EVTROUTINE handling(#Com_Owner.Initialize);
Change #Std_Obj *Data_Tier;
-------------- This commandENDROUTINE;
EVTROUTINE handling(#Com_Owner.Closing);
Change #Std_Obj *End_All_Tiers;
---------- and this commandENDROUTINE;
The references to system variables *DATA_TIER in the Initialize event routine and *END_ALL_TIERS in the Closing event routine make this form tier aware (see the source code of this example for more details).
| Tier | Management |
| Multi Tier | Remote Procedure |
| Database | Client |
| Server | n-Tier |
| Example 135 |