FilterController.FullTextFilterAction Property

Provides access to the FilterController‘s FullTextSearch Action.

Namespace: DevExpress.ExpressApp.SystemModule

Assembly: DevExpress.ExpressApp.v23.2.dll

NuGet Package: DevExpress.ExpressApp

Declaration

C#

public ParametrizedAction FullTextFilterAction { get; }

VB.NET

Public ReadOnly Property FullTextFilterAction As ParametrizedAction

Property Value

Type	Description
ParametrizedAction	A ParametrizedAction object representing the FullTextSearch Action.

Remarks

The FullTextSearch Action is intended to search the current List View‘s objects whose persistent properties include individual words from the combination typed by an end-user:

ASP.NET Core Blazor

Windows Forms

ASP.NET Web Forms

The code below demonstrates how access the FullTextFilterAction and show an object’s Detail View if the Action returns only one object.

C#

using System;
using System.Collections;
using DevExpress.ExpressApp;
using DevExpress.ExpressApp.SystemModule;
using DevExpress.Persistent.BaseImpl;

// ...
public class FilterActionController : ObjectViewController<ListView, Person> {
    protected override void OnActivated() {
        base.OnActivated();
        FilterController filterController = Frame.GetController<FilterController>();
        if(filterController != null) {
            filterController.FullTextFilterAction.Executed += FullTextFilterAction_Executed;
        }
    }
    private void FullTextFilterAction_Executed(object sender, DevExpress.ExpressApp.Actions.ActionBaseEventArgs e) {
        int count = ((IList)View.CollectionSource.Collection).Count;
        if (count == 1) {
            IObjectSpace objectSpace = Application.CreateObjectSpace(typeof(Person));
            Object person = ((IList)View.CollectionSource.Collection)[0];
            e.ShowViewParameters.CreatedView = Application.CreateDetailView(
                objectSpace, objectSpace.GetObject(person));
        }
    }
}

VB.NET

Imports System
Imports System.Collections
Imports DevExpress.ExpressApp
Imports DevExpress.ExpressApp.SystemModule
Imports DevExpress.Persistent.BaseImpl

Public Class FilterActionController
    Inherits ObjectViewController(Of ListView, Person)

    Protected Overrides Sub OnActivated()
        MyBase.OnActivated()
        Dim filterController As FilterController = Frame.GetController(Of FilterController)()
        If filterController IsNot Nothing Then
            AddHandler filterController.FullTextFilterAction.Executed, AddressOf FullTextFilterAction_Executed
        End If
    End Sub
    Private Sub FullTextFilterAction_Executed(ByVal sender As Object, _
        ByVal e As DevExpress.ExpressApp.Actions.ActionBaseEventArgs)
        Dim count As Integer = DirectCast(View.CollectionSource.Collection, IList).Count
        If count = 1 Then
            Dim objectSpace As IObjectSpace = Application.CreateObjectSpace(GetType(Person))
            Dim person As Object = DirectCast(View.CollectionSource.Collection, IList)(0)
            e.ShowViewParameters.CreatedView = Application.CreateDetailView( _
                objectSpace, objectSpace.GetObject(person))
        End If
    End Sub
End Class

When the FullTextSearch is executed, the Search Criteria Builder generates the CriteriaOperator object, which is then assigned to the FullTextSearchCriteria item of the List View Collection Source’s Criteria collection. To generate the criterion, the Builder collects the properties based on the Filter Controller’s FilterController.FullTextSearchTargetPropertiesMode property value.

By default, the FullTextSearch Action splits the search request into separate words by spaces. The result includes records that contain all these words in an arbitrary order. If you need to find the exact match of the phrase containing spaces, enclose your request in quotation marks (“”).

Note

The FullTextSearch Action always performs a search over the Friendly Key property, even if the FullTextSearchTargetPropertiesMode.VisibleColumns mode is specified and Friendly Key column is hidden. The Friendly Key property is a business class property specified via the FriendlyKeyPropertyAttribute or via the IModelClass.FriendlyKeyProperty option in the Application Model.

The following techniques can be used to modify the default behavior of the FullTextSearch Action:

• To modify the approach by which the criterion is created, handle the FilterController.CustomBuildCriteria event.
• To provide a custom list of the properties to be used in the generated criterion, handle the FilterController.CustomGetFullTextSearchProperties event.
• To perform a search only by the properties that are presented by visible columns in the current List View, set the FilterController.FullTextSearchTargetPropertiesMode property to the FullTextSearchTargetPropertiesMode.VisibleColumns value.
• To exclude individual properties from the list of the properties to be used in the generated criterion, apply the SearchMemberOptionsAttribute to them. See the SearchClassOptionsAttribute as well.
• To search the word combination typed as the Action’s parameter, in each persistent property of the available objects, set the FilterController.FullTextSearchMode property to the SearchMode.SearchInProperty value.

By default, the FullTextSearch Action is active when the target object type is persistent, and the object collection is allowed for filtering. To ascertain why the FullTextSearch Action is currently deactivated or disabled, use the DiagnosticInfo Action. If you need to change the Action’s “active” or “enabled” state in code, use its ActionBase.Active or ActionBase.Enabled property, respectively.

Information on the FullTextSearch Action is available in the Application Model‘s ActionDesign node. To access it, use the Model Editor.