ListView.ValidateObject Event
Occurs when the object represented by the ListView‘s focused row must be validated.
Namespace: DevExpress.ExpressApp
Assembly: DevExpress.ExpressApp.v24.2.dll
NuGet Package: DevExpress.ExpressApp
Declaration
Event Data
The ValidateObject event's data class is ValidateObjectEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| ErrorText | Specifies the message that must be displayed in a UI when the object being checked is not valid. |
| Object | Provides access to the object that is being manipulated. Inherited from ObjectManipulatingEventArgs. |
| Valid | Specifies whether the object that is being checked is valid or not. |
Remarks
Handle this event to perform custom validation of the objects represented by an editable List View. The object that is being validated can be accessed via the handler’s Object parameter. Check whether it is valid, and if it is not, set the ValidateObjectEventArgs.Valid to false and the ValidateObjectEventArgs.ErrorText to the message that must be displayed in a UI. In this instance, it will be impossible to change the focused row until the entered data is corrected.