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

VGridControlBase.InvalidValueException Event

Enables a proper response to entering an invalid cell value to be provided.

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

Expanded Syntax

Expanded Event Data

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

The following InvalidValueExceptionEventArgs properties provide information specific to this event.
Property Description
ErrorText Gets or sets the error description to be displayed in the message box/tooltip.
Exception Gets the exception that caused the event.
ExceptionMode Gets or sets the type of response to supplying invalid values.
Value Gets an invalid value that caused the exception.
WindowCaption Gets or sets the caption of the error message box.

Expanded Remarks

The InvalidValueException event allows you to handle exceptions raised as a result of assigning invalid values to cells. Generally, this takes place when using a wrong value type or when an exception is raised during validation (the ValidatingEditor event).

The InvalidValueException event fires regardless of whether the value was entered by an end-user or changed in code. Handle this event to perform an appropriate exception handling, as shown in the example below. The event parameter provides a number of properties that allow you to get the exception information, specify whether the exception should be raised, etc.

For more information, see Validation.

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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