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281 Exercise 15: Screens: Data Transport
Exercise Duration: 30 Minutes
Exercise Objectives
After completing this exercise, you will be able to:
• Fill the screen fields with data from the program
Business Example
The screen of your program ZBC400_##_DYNPRO is to display the detailed data for the selected booking. Data changes by the user are to be available in the program after leaving the screen.
System Data
System: Will be assigned Client: Will be assigned User ID: Will be assigned Password: Will be assigned
Set up instructions: No special instructions when using a standard training system
Task 1:
Preparations
1. Extend your program ZBC400_##_DYNPRO_1 or copy the template SAPBC400UDS_DYNPRO_1 to the new name ZBC400_##_DYNPRO_2 for further processing.
2. In your program, use the TABLES statement to create a work area. This work area will serve as the screen interface. This work area must have the same name as the structure used on the screen.
3. Make sure that the key fields of the selected booking are available when the user selects a basic list row (HIDE).
Task 2:
Authorization check and data retrieval before the screen is called
1. Later, you should change your program appropriately so that the data in the database can be changed. Ensure that the screen can only be processed if the user has change authorization for the airline selected. If the user does not have the authorization, return to the basic list with message 047 of message class BC400. Message type 'S' is suitable.
Continued on next page
If the user has the authorization, read the selected posting (all fields) from database table SBOOK in your work area wa_sbook. This single access also retrieves the missing data of the booking and also ensures that current data is available for display.
2. Immediately before calling the screen, copy the relevant data from wa_sbook into the TABLES work area to have it transported to the screen automatically.
Solution 15: Screens: Data Transport
Task 1:
Preparations
1. Extend your program ZBC400_##_DYNPRO_1 or copy the template SAPBC400UDS_DYNPRO_1 to the new name ZBC400_##_DYNPRO_2 for further processing.
a) Carry out this step as usual.
2. In your program, use the TABLES statement to create a work area. This work area will serve as the screen interface. This work area must have the same name as the structure used on the screen.
a) Carry out this step as usual.
3. Make sure that the key fields of the selected booking are available when the user selects a basic list row (HIDE).
a) See source code excerpt in the model solution.
Task 2:
Authorization check and data retrieval before the screen is called
1. Later, you should change your program appropriately so that the data in the database can be changed. Ensure that the screen can only be processed if the user has change authorization for the airline selected. If the user does not have the authorization, return to the basic list with message 047 of message class BC400. Message type 'S' is suitable.
If the user has the authorization, read the selected posting (all fields) from database table SBOOK in your work area wa_sbook. This single access also retrieves the missing data of the booking and also ensures that current data is available for display.
a) See source code excerpt in the model solution.
2. Immediately before calling the screen, copy the relevant data from wa_sbook into the TABLES work area to have it transported to the screen automatically.
a) See the source code excerpt in the model solution.
Result
Source code excerpt: SAPBC400UDS_DYNPRO_2
REPORT sapbc400uds_dynpro_2.
Continued on next page
CONSTANTS: actvt_display TYPE activ_auth VALUE ’03’, actvt_change TYPE activ_auth VALUE ’02’.
PARAMETERS pa_anum TYPE sbook-agencynum.
* workarea for SELECT
DATA wa_sbook TYPE sbook.
* workarea for data communication with screen
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| MESSAGE e045(bc400) WITH pa_car. ENDIF. | | | CLEAR wa_sbook. |