When set to Single read, the control reads the first code and then stops scanning. When Continuous read is selected, it reads all the codes it can while the control is visible, non-stop.
| Continuous read |
| Single read |
Generators: Android, Apple
Controls: Attribute/Variable (Control Type: Scanner)
Level: Attribute, Domain, Variable
This property is offered in Panel objects for variables or attributes whose Control Type property = Scanner.
It enables the Scanner Control to control how the reading will be handled.
Use the CodeRead or ControlValueChanged events to process it.
The difference between both events is that CodeRead will scan non-stop and possibly repeat the same detection, while ControlValueChanged will not repeat consecutive reads.
This property is available in a Panel object with a variable or attribute Scanner control.
The control reads the first code and then stops scanning.
The control reads all the codes it can while the control is visible (non-stop). Set the control Visible property to false if you want to stop reading codes.
This property applies only at design-time.
Define &code1 and &code2 as Varchar variables and set the Scanner control type.
To process different codes, use the ControlValueChanged event:
Event &code1.ControlValueChanged // Inline + Continuous Read
Composite
&CodesCollection.Add(&code1)
EndComposite
Endevent
To process all codes, use the CodeRead event:
Event &code2.CodeRead // Inline + Continuous Read
Composite
&CodesCollection.Add(&code1)
EndComposite
Endevent
To apply the corresponding changes when the property value is configured, execute a Build with this Only of the object.
This property is available since GeneXus 17 Upgrade 5.
Display mode property