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 End-User Documentation

BaseView.InvalidValueException Event

Enables you to provide a proper response to entering an invalid cell value.

Namespace:DevExpress.XtraGrid.Views.Base
Assembly:DevExpress.XtraGrid.v17.2.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 the result of assigning invalid values to cells. Generally, this takes place when using a wrong value type or when raising an exception during validation (using the ValidateEditor method). The InvalidValueException event fires regardless of whether the value was entered by the end-user or assigned via code. Write a handler for this event to perform the appropriate exception handling, as shown in the example below. The event parameter provides a number of properties that allow you to access exception information, specify whether the exception should be raised, etc.

For detailed information on how to handle exceptions, see the Validating Editors topic.

Expanded Example

The following example prohibits invalid "colBudget" column cell value assignment. The cell value should be grater than zero and less than 1,000,000. The ValidatingEditor event is handled to check the entered value's validity. The InvalidValueException event is handled to display an exception message box if invalid cell value assignment occurs. In this instance, the GridView.HideEditor method is called to discard the changes made and to destroy the cell's editor.

Expanded See Also

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