FileManagerDetailsViewCustomColumnHeaderFilterFillItemsEventArgs.AddValue(String, String) Method
Adds a new filter item to the column header filter.
Namespace: DevExpress.Web
Assembly: DevExpress.Web.v19.1.dll
Declaration
Parameters
Name | Type | Description |
---|---|---|
displayText | String | A String value that specifies the filter item’s display text. |
value | String | A String value that specifies the filter item’s value. |
Remarks
This method uses the equality operator to compare values. To provide your own filter criteria, use the AddValue method’s overload with the query parameter.
To learn more about custom columns, see the Custom Columns topic.
Example
This code sample demonstrates how to populate a custom column’s header filter with custom items. For this purpose, the ASPxFileManager.DetailsViewCustomColumnHeaderFilterFillItems event is handled.
Note
A complete sample project is available at https://github.com/DevExpress-Examples/aspxfilemanager-how-to-implement-a-custom-column-and-provide-it-with-a-custom-header-filter-t220483
<dx:ASPxFileManager ID="ASPxFileManager1" runat="server" Width="800px" Height="400px" OnDetailsViewCustomColumnDisplayText="ASPxFileManager1_DetailsViewCustomColumnDisplayText" OnDetailsViewCustomColumnHeaderFilterFillItems="ASPxFileManager1_DetailsViewCustomColumnHeaderFilterFillItems">
<Settings RootFolder="~\Files\" ThumbnailFolder="~\Thumb\" />
<SettingsFileList View="Details">
<DetailsViewSettings>
<Columns>
<dx:FileManagerDetailsColumn Caption=" " FileInfoType="Thumbnail" VisibleIndex="0">
</dx:FileManagerDetailsColumn>
<dx:FileManagerDetailsColumn Caption="Name" VisibleIndex="1">
</dx:FileManagerDetailsColumn>
<dx:FileManagerDetailsCustomColumn Caption="Extension" Name="FileExtension" VisibleIndex="2" ShowHeaderFilterButton="True">
</dx:FileManagerDetailsCustomColumn>
</Columns>
</DetailsViewSettings>
</SettingsFileList>
</dx:ASPxFileManager>
Related GitHub Examples
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