A PowerBuilder DWObject object is an object that exists within a DataWindow object. Each column, computed field, text control, or drawing control is a DWObject.
A DWObject reference allows you to refer directly to controls within a DataWindow.
You can use a DWObject variable to simplify DataWindow property and data expressions. A DWObject variable takes the place of several elements of the control’s dot notation.
The following syntaxes and examples show how using a DWObject variable affects property and data expressions.
The simple syntax for a property expression is:
dwcontrol.Object.dwcontrolname.property
You can use a DWObject variable to refer to dwcontrolname.
If the code declares a DWObject variable and assigns the control within the DataWindow to the variable, using syntax like this:
DWObject dwobjectvar
dwobjectvar = dwcontrol.Object.dwcontrolname
the syntax of the expression itself becomes:
dwobjectvar.property
For example, if the DataWindow had a column named empname, a text control named t_emplabel, and a computed field named cf_average, you could make the following assignments:
DWObject dwo_column, dwo_text, dwo_compute
dwo_column = dw_1.Object.empname
dwo_text = dw_1.Object.t_emplabel
dwo_compute = dw_1.Object.cf_average
You can use a DWObject variable to refer to a column in a data expression. For example, this syntax gets data for a single row and column:
dwcontrol.Object.columnname {.buffer } {.datasource } [ rownum ]
If the code declares a DWObject variable and assigns the control within the DataWindow to the variable, using syntax like this:
DWObject dwobjectvar
dwobjectvar = dwcontrol.Object.columnname
The syntax of the expression itself becomes:
dwobjectvar. {.buffer } {.datasource } [ rownum ]
