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 End-User Documentation

ColumnView.ShowFilterPopupListBox Event

Enables you to customize a particular column's filter dropdown list.

Namespace:DevExpress.XtraGrid.Views.Base
Assembly:DevExpress.XtraGrid.v17.1.dll

Expanded Syntax

Expanded Event Data

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

The following FilterPopupListBoxEventArgs properties provide information specific to this event.
Property Description
Column Gets the grid column being processed.
ComboBox Gets an object providing access to the filter dropdown's items.

Expanded Remarks

The ShowFilterPopupListBox event fires before the filter dropdown list is displayed. Write a handler for this event to manage the items within the list. Existing items can be deleted and new ones added with custom captions and corresponding filter values.

For details on customizing the filter dropdown list, see the Filter Dropdowns topic.

Expanded Example

The following example illustrates how to use the ShowFilterPopupListBox event to add two custom items ("TODAY" and "THIS MONTH") to the regular filter dropdown list for the OrderDate column.

When an end-user selects the TODAY item, an appropriate filter is applied to the column and this selects all the records whose OrderDate field contains a date between 12:00 AM and 11:59 PM today. Similarly, the THIS MONTH filter item selects the records which refer to the current month.

The next image shows the Grid View after selecting the 'TODAY' filter item:

Filter strings for the TODAY and THIS MONTH items are created via the custom getFilterString function. The text for the items to display in the filter panel is retrieved via the custom getFilterDisplayText function.

For information on creating ColumnFilterInfo objects to represent specific filter criteria, refer to the Filtering in Code topic.

Expanded Example

The following code shows how to remove all the items in a regular filter dropdown list except for the predefined ones, and then add a new value item ('VIP Client') to the CustomerID column. It's assumed that the columns' MRU filter items are disabled (the ColumnViewOptionsFilter.AllowColumnMRUFilterList property is set to false):

Selecting this item applies the ("[CustomerID] = 'DUMON'") filter to the bound data source:

Expanded See Also

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