CheckButton.GroupIndex Property
Gets or sets the button’s group index. Within a group, only one button may be checked at a time. When users click another button in a group, the checked state moves from the current button to the clicked one.
Namespace: DevExpress.XtraEditors
Assembly: DevExpress.XtraEditors.v19.1.dll
Declaration
Property Value
| Type | Default | Description |
|---|---|---|
| Int32 | -1 | The button’s group index |
Remarks
To combine buttons into a logical group, set their GroupIndex properties to the same non-negative value. If the GroupIndex propert is set to -1, this button doesn’t belong to any group.
If you want users to be able to uncheck a checked button, set its CheckButton.AllowAllUnchecked property to true. The default value of this property is false.
To respond to a button’s state change, handle the CheckButton.CheckedChanged event.
The code sample below illustrates how to group several check buttons into two groups.
checkButtonStudentLevelBeginner.GroupIndex = 1;
checkButtonStudentLevelIntermediate.GroupIndex = 1;
checkButtonStudentLevelAdvanced.GroupIndex = 1;
checkButtonWantsToImprove.GroupIndex = 2;
checkButtonDoesntWantToImprove.GroupIndex = 2;