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 End-User Documentation

RepositoryItem.Validating Event

Allows you to specify whether the edit value is valid and whether the editor is allowed to lose focus.

Namespace:DevExpress.XtraEditors.Repository
Assembly:DevExpress.XtraEditors.v17.2.dll

Expanded Syntax

Expanded Event Data

The event handler receives an argument of type System.ComponentModel.CancelEventArgs containing data related to this event.

The following CancelEventArgs properties provide information specific to this event.
Property Description
Cancel Gets or sets a value indicating whether the event should be canceled.

Expanded Remarks

The Validating event fires when the end-user accepts the edited value (i.e. the editor is about to be validated). This can take place in two cases:

Note: the editor's CausesValidation property should be set to true for the Validating event to be raised. Otherwise, neither of the instances mentioned above lead to editor validation.

Handle the Validating event to test the edit value against your custom validity criteria. If the entered value doesn't suit your restrictions, you can prohibit focus from being moved by setting the event's Cancel parameter to true. Thus, end-users will be forced to correct the edit value. For example, you can check whether the entered text contains only appropriate characters or a numeric value falls into a predefined range, etc.

Setting the editor's BaseEdit.ErrorText via the Validating event is not supported if the editor is used in-place within container controls, such as GridControl, PropertyGridControl, etc. To provide a validation error text when an editor is used in in-place mode, handle the ValidatingEditor event provided by the container control. Refer to the See Also section below for a list of these events.

For detailed information on how to implement validation, see the Validation help topic.

Expanded See Also

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