validations on fields

[Former Member]

What is the Process to validate input fields in module programs?

[Former Member]

Hi,

Use chain and end chain statement

i use the CHAIN statement in my PAI for checking whether the input of a user is valid.

Here an example:

codePROCESS AFTER INPUT.

MODULE leave_programm AT-EXIT COMMAND.

CHAIN.

FIELD: field1,

field2,

field3

MODULE check_input.

ENDCHAIN.

MODULE user_command_0100.

[/code]

The Module check_input checks whether the user input in field 1 to 3 is valid (e.g. for a search of something). If the input isn't valid, i throw an error Message within check_input and the fields between CHAIN and ENDCHAIN on actual SCREEN accept a new user input, while other Fields on SCREEN doesn't accept input.

If everything's fine the program can move on with user_command_0100 and searching or whatever.

Reward if useful.

Regards

[Former Member]

In module pool programming we can validate a particular field in the process after input event i.e. PAI.

We can use the field command to validate a single field or a CHAIN ENDCHAIN command to validate a group of fields.

[Former Member]

Hi Mukesh,

In PAI (Write field statement on field you want to validate, if you want to validate group of fields put in chain and End chain statement.)

Regards,

Chandru