PropertyTrigger In Wpf:-

We can change the property of control based on another property using property triggers.The below code is simple example of property trigger which display the text based on checkbox.

<Window x:Class="WpfPropertyTriggers.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        Title="MainWindow" Height="350" Width="525">

    <Grid>

        <Grid.Resources>

            <!--Add the style for check box-->

            <Style TargetType="{x:Type CheckBox}" x:Key="cbStyle">

                <Style.Triggers>

                    <!--Check whether checkbox checked or not-->

                    <Trigger Property="IsChecked" Value="true">

                        <!--If checkbox is checked then display the text and set the color-->

                        <Setter Property="Foreground" Value="Red"></Setter>

                        <Setter Property="Content" Value="You checked the box..."></Setter>

                    </Trigger>

                </Style.Triggers>

            </Style>

        </Grid.Resources>

        <Grid.ColumnDefinitions>

            <ColumnDefinition Width="150"></ColumnDefinition>

        </Grid.ColumnDefinitions>

        <!--Apply the style resource for check box-->

        <CheckBox Name="cb" Grid.Column="0" Style="{StaticResource cbStyle}"></CheckBox>

    </Grid>

</Window>

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