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Advanced PowerBuilder
Exercises
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Description |
| 1. |
Write a function to log
'login time' and 'log out time' for each user, in a database table and implement it. We
don't have a table to store the login and logout information. You need to create that
table also. So, design and create the table. Tip:
You can create two functions to log the above specified details, one to log login info and
another to log logout info. You can create these functions at uo_transaction user object.
Solution:- ex-13-1.zip |
| 2. |
Create a class user
object, inheriting from the "Error" class. Implement a function to save the
error information to a specified error file. Use this in the application, instead of
"Error" object. Use this newly created function from "Save to Log". Tip:- You can copy code written to 'Save to Log'
CommandButton in the 'w_error' window and modify it and put in the written function.
Solution: - ex-13-2.zip |
| 3. |
This exercise would be
interesting. Recall that we placed five SingleLineEdit controls in the w_login window. For
each control, we wrote script in the 'GotFocus' and 'LoseFocus' events, to display help on
the st_help StaticText control ( recall that st_help is located in the w_login window ).
What we want you to do is, create an user object 'uo_sle' of type SingleLineEdit control
and write script in those events, to display help on the st_help control. Once you create
'uo_sle', replace all SingleLineEdit controls in the w_login window, with 'uo_sle'. The
challenging part of this exercise is that, you can't directly refer to st_help from the
user object 'uo_sle', because, st_help is not part of 'uo_sle', it is part of w_login
window. Tip:- You can create an
instance variable of type StaticText control in 'uo_sle' and assign st_help to that
instance variable from outside, may be from w_login window's open event.
Solution: - ex-13-3.zip |
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