Description
The expression for a computed field control in the DataWindow. The expression is made up of calculations and DataWindow expression functions. The DataWindow evaluates the expression to get the value it will display in the computed field.
Applies to
Computed field controls
Syntax
PowerBuilder dot notation:
dw_control.Object.computename.Expression
Describe and Modify argument:
"computename.Expression { = 'string' }"
|
Parameter |
Description |
|---|---|
|
computename |
The name of the computed field control in the DataWindow for which you want to get or set the expression |
|
string |
A string whose value is the expression for the computed field |
Usage
In the painter
Select the control and set the value in the Properties view, General tab, Expression option. The More button displays the Modify Expression dialog, which provides help in specifying the expression. The Verify button tests the expression.
Examples
setting = dw1.Object.comp_1.Expression
dw1.Object.comp_1.Expression = "avg(salary for all)"
setting = dw1.Describe("comp_1.Expression")
dw1.Modify("comp_1.Expression='avg(salary for all)'")