ListViewFilter Attribute

• Sep 23, 2019
• 2 minutes to read

Apply this attribute to a business class to specify a filter for the List View that will display this class’ objects. The specified filter will be loaded to the Application Model as a child node of the appropriate Filters node. All the filters added to a ListView node are represented by the built-in SetFilter Action’s items in the drop-down window. An end-user can select an item to apply the required filter to the current List View.

C#

using DevExpress.ExpressApp.Model;
using DevExpress.ExpressApp.SystemModule;
//...
[DefaultClassOptions]
[ListViewFilter("Today", "[DueDate] = LocalDateTimeToday()")]
[ListViewFilter("In three days", "[DueDate] >= ADDDAYS(LocalDateTimeToday(), -3) AND 
    [DueDate] < LocalDateTimeToday()")]
[ListViewFilter("In two weeks", "[DueDate] >= ADDDAYS(LocalDateTimeToday(), -14) AND 
    [DueDate] < LocalDateTimeToday()")]
[ListViewFilter("The last week", "[DueDate] > LocalDateTimeLastWeek() AND 
    [DueDate] <= ADDDAYS(LocalDateTimeLastWeek(), 5)")]
[ListViewFilter("This week", "[DueDate] > LocalDateTimeThisWeek() AND 
    [DueDate] <= ADDDAYS(LocalDateTimeThisWeek(), 5)")]
public class Task : BaseObject {
   public Task(Session session) : base(session) {}
   private DateTime dueDate;
   [ModelDefault("EditMask","d")]
   public DateTime DueDate {
      get {
         return dueDate;
      }
      set {
         SetPropertyValue(nameof(DueDate), ref dueDate, value);      }
   }
}

VB.NET

Imports DevExpress.ExpressApp.Model
Imports DevExpress.ExpressApp.SystemModule
'...
<DefaultClassOptions, _
ListViewFilter("Today", "[DueDate] = LocalDateTimeToday()"), _
ListViewFilter("In three days", "[DueDate] >= ADDDAYS(LocalDateTimeToday(), -3) AND _
   [DueDate] < LocalDateTimeToday()"), _
ListViewFilter("In two weeks", "[DueDate] >= ADDDAYS(LocalDateTimeToday(), -14) AND _
   [DueDate] < LocalDateTimeToday()"), _
ListViewFilter("The last week", "[DueDate] > LocalDateTimeLastWeek() AND _
   [DueDate] <= ADDDAYS(LocalDateTimeLastWeek(), 5)"), _
ListViewFilter("This week", "[DueDate] > LocalDateTimeThisWeek() AND _
   [DueDate] <= ADDDAYS(LocalDateTimeThisWeek(), 5)")> _
Public Class Task
      Inherits BaseObject
   Public Sub New(ByVal session As Session)
      MyBase.New(session)
   End Sub
   Private fDueDate As DateTime
   <ModelDefault("EditMask","d")> _
   Public Property DueDate() As DateTime
      Get
         Return fDueDate
      End Get
      Set(ByVal value As DateTime)
         SetPropertyValue(NameOf(DueDate), fDueDate, value)
      End Set
   End Property
End Class

For details, see ListViewFilterAttribute.

Note

The filters specified via the ListView Filter attribute are added to all autogenerated ListView nodes whose ModelClass attribute is set to the class to which the attribute is applied. The attribute does not add filters to nodes that are created manually or cloned in the Model Editor. The SetFilter Action is activated for root and nested List Views, since only the MainForm and DetailViewForm Windows Forms Templates and the Default ASP.NET Template contain the Filters Action Container that displays this Action.