FocusBehavior Class

Allows you to set the focus to a UI control without utilizing code-behind.

Namespace: DevExpress.Mvvm.UI

Assembly: DevExpress.Xpf.Core.v19.1.dll

Declaration

C#

[TargetType(typeof(Control))]
public class FocusBehavior :
    EventTriggerBase<Control>

VB.NET

<TargetType(GetType(Control))>
Public Class FocusBehavior
    Inherits EventTriggerBase(Of Control)

Remarks

See FocusBehavior to learn more.

Example

Note

A complete sample project is available at https://github.com/DevExpress-Examples/how-to-use-focusbehavior-t122987.

MainViewModel.cs

using DevExpress.Mvvm;
using DevExpress.Mvvm.DataAnnotations;

namespace Example.ViewModel {
    [POCOViewModel]
    public class MainViewModel {
    }
}

MainView.xaml

<UserControl x:Class="Example.View.MainView"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:ViewModel="clr-namespace:Example.ViewModel"
    xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d" d:DesignHeight="500" d:DesignWidth="600"
    DataContext="{dxmvvm:ViewModelSource Type=ViewModel:MainViewModel}">

    <Grid x:Name="LayoutRoot" Background="White">
        <StackPanel Orientation="Vertical">
            <StackPanel Orientation="Horizontal" Margin="10">
                <TextBlock Text="This control is focused on button click: " VerticalAlignment="Center"/>
                <TextBox Text="Click the bottom button">
                    <dxmvvm:Interaction.Behaviors>
                        <dxmvvm:FocusBehavior SourceName="bt" EventName="Click"/>
                    </dxmvvm:Interaction.Behaviors>
                </TextBox>
                <Button x:Name="bt" Content="Click to focus the TextBox"/>
            </StackPanel>
            <StackPanel Orientation="Horizontal" Margin="10">
                <TextBlock Text="This control is focused on startup: " VerticalAlignment="Center"/>
                <TextBox Text="Focus is here">
                    <dxmvvm:Interaction.Behaviors>
                        <dxmvvm:FocusBehavior/>
                    </dxmvvm:Interaction.Behaviors>
                </TextBox>
            </StackPanel>
        </StackPanel>
    </Grid>
</UserControl>

MainViewModel.vb

Imports DevExpress.Mvvm
Imports DevExpress.Mvvm.DataAnnotations

Namespace Example.ViewModel
    <POCOViewModel> _
    Public Class MainViewModel
    End Class
End Namespace

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the FocusBehavior class.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

how-to-create-a-scheduling-application-which-uses-custom-editing-and-recurrence-dialog-t545486/CS/CustomMvvmFormWithRecurrenceExample/HospitalAppointmentWindow.xaml#L88

<dxmvvm:Interaction.Behaviors>
    <dxmvvm:FocusBehavior />
</dxmvvm:Interaction.Behaviors>

using-schedulercontrol-smart-tag-in-vs-designer-a-sample-project-t574568/VB/SmartTagExample/CustomAppointmentWindow.xaml#L53

<dxmvvm:Interaction.Behaviors>
    <dxmvvm:FocusBehavior/>
</dxmvvm:Interaction.Behaviors>

Inheritance

Show 11 items

Object

DispatcherObject

DependencyObject

Freezable

Animatable

DevExpress.Mvvm.UI.Interactivity.AttachableObjectBase

DevExpress.Mvvm.UI.Interactivity.Behavior

DevExpress.Mvvm.UI.Interactivity.TriggerBase

DevExpress.Mvvm.UI.Interactivity.TriggerBase<Control>

EventTriggerBase<Control>

FocusBehavior

Extension Methods

GetErrorOperationCommands(Position)

GetErrorOperationCommands(Int32)

GetErrorOperationCommands(Point)