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View this topic on docs.devexpress.com (Learn more)

VGridControlBase.ValidatingEditor Event

Enables you to perform manual validation of cell values.

Namespace:DevExpress.XtraVerticalGrid
Assembly:DevExpress.XtraVerticalGrid.v19.2.dll

Expanded Syntax

Expanded Event Data

The event handler receives an argument of type BaseContainerValidateEditorEventArgs containing data related to this event.

The following BaseContainerValidateEditorEventArgs properties provide information specific to this event.
Property Description
ErrorText Gets or sets the error description.
Valid Gets or sets whether the value is valid.
Value Gets or sets the value being validated.

Expanded Remarks

Editor validation takes place when attempting to save the edited value (using the PostEditor method) or when closing the active editor. The currently validated cell is identified by the FocusedRow and FocusedRecord properties.

First, automatic validation is performed. The editor determines whether it can accept the entered value. After the automatic validation has been performed, the ValidatingEditor event is raised. Handle this event to implement custom constraints on cell values.

If the entered value doesn't match your custom criteria, set the event parameter's BaseContainerValidateEditorEventArgs.Valid parameter to false. The value is specified by the BaseContainerValidateEditorEventArgs.Value property. The cell being edited can be identified using the vertical grid's FocusedRow, FocusedRecord and FocusedRecordCellIndex properties.

If the BaseContainerValidateEditorEventArgs.Valid parameter's value has been set to false, the edit value isn't saved, and the cell remains focused so that end-users can correct it. Additionally, the cell displays an error icon () and the tooltip which contains the text specified by the BaseContainerValidateEditorEventArgs.ErrorText property. Note that the BaseContainerValidateEditorEventArgs.Valid parameter can initially be set to false. This takes place if the editor fails automatic validation.

The default event handling result (displaying an error icon and tooltip leaving the editor focus unchanged) can be overridden by handling the InvalidRecordException event.

Expanded Example

The following example prohibits assignment of invalid values to "Department Budget" child rows. The cell's value should be no greater than 100,000. The ValidatingEditor event is handled to check the entered value's validity. The InvalidValueException event is handled to display an exception message box if an invalid value is assigned. In this instance, the HideEditor method is called to discard the changes made and destroy the cell's editor.

Expanded See Also

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