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

VGridControlBase.CustomizationFormCreatingCategory Event

Fires when a new category is about to be created in Customization Form.

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

Expanded Syntax

Expanded Event Data

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

The following CustomizationFormCreatingCategoryEventArgs properties provide information specific to this event.
Property Description
CanCreate Gets or sets a value specifying whether the creation of a new category row with the specified caption is allowed within the Customization Form.
Category Gets the processed category row.

Expanded Remarks

To create a new category in Customization Form, switch to the Categories page, click New... and enter the category's caption. Users can drag the new category to the grid and then drag rows to the category.

The CustomizationFormCreatingCategory event fires after the user clicks Ok and before the new category is added to the grid's Rows collection.

The CategoryEventArgs.Category event parameter returns the category that is about to be created. Set the CustomizationFormCreatingCategoryEventArgs.CanCreate parameter to false to discard the new category.

Expanded Example

When users create a new category, they enter the category's caption. The example below shows how to check whether a category with the same caption already exists in the grid. If the captions match, the code shows a warning message.

The code enumerates the grid's categories to compare their captions with the new category's caption. See Tree Traversal for more information on how to enumerate the grid's rows.

Expanded See Also

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