OBSOLETE - Date Range Filtering in the Filter Row

UPDATED:

Starting with version v2015 vol 2 (v15.2), this functionality is available out of the box. Simply set the GridViewDataColumn.SettingsHeaderFilter.Mode property to DateRangePicker to activate it. Please refer to the ASP.NET Grid View - Data Range Filter, Adaptivity and More (Coming soon in v15.2) blog post and the Date Range Header Filter demo for more information.
If you have version v15.2+ available, consider using the built-in functionality instead of the approach detailed below.

For Older Versions:

This example illustrates how to specify a column's FilterTemplate by using two ASPxDateEdit controls and use them for date range filtering:
- Enter the start and end date values;
- Call the client-side ASPxClientGridView.AutoFilterByColumn method and pass the target column's FieldName and entered values as parameters;
- Handle the server-side ASPxGridView.ProcessColumnAutoFilter event;
- Check if the currently processed column (e.Column.FieldName) is the target one. If so, retrieve the passed value (e.Value) and create data range filter criteria (e.Criteria) using the approach illustrated in the Create the Custom Filter Criteria example.

See Also:
E2203: CheckComboBox filtering in the Auto Filter Row
E1950: OBSOLETE - ASPxGridView - Date Auto Filter
E5038: GridView - How to implement date range filtering using a custom editor in the AutoFilterRow

ASPxGridView - How to customize RowFilter in DataDateColumn and provide two ASPxDateEdit controls that allow setting a date range as a filter expression