Changing the DataWindow in PowerBuilder
When you associate a DataWindow object with a control in the
window, you are setting the initial value of the DataWindow control’s
DataObject property.
During execution, this tells your application to create an
instance of the DataWindow object specified in the control’s
DataObject property and use it in the control.
Setting the DataObject property in
code
In addition to specifying the DataWindow object in the Window
painter, you can switch the object that displays in the control during
execution by changing the value of the DataObject property in
code.
For example: to display the DataWindow object d_emp_hist from
the library emp.pbl in the DataWindow control dw_emp, you can
code:
|
1 |
dw_emp.DataObject = "d_emp_hist" |
The DataWindow object d_emp_hist was created in the DataWindow
painter and stored in a library on the application search path. The
control dw_emp is contained in the window and is saved as part of the
window definition.
Preventing redrawing
You can use the SetRedraw method to turn off redrawing in
order to avoid flicker and reduce redrawing time when you are making
several changes to the properties of an object or control.
Dynamically changing the DataWindow object at execution time
implicitly turns redrawing on. To turn redrawing off again, call the
SetRedraw method every time you change the DataWindow object:
|
1 2 |
dw_emp.DataObject = "d_emp_hist" dw_emp.SetRedraw(FALSE) |
Using PSR files
To put a PSR file into a DataWindow control at execution time,
change the control’s DataObject property to specify that PSR file
name.