WPF Create Style、Template、Trigger In C# Code

    #region Create Style In Code
        ///
<summary>
        /// Creates a a Style in
code

        ///
</summary>
        private Style
CreateStyleInCode()
        {

            //XAML code is
as shown below, nice and simply really

            //<Style
TargetType="ListBoxItem">
            //    <Setter
Property="TextElement.FontSize" Value="14"/>

            //   
<Style.Triggers>
            //        <Trigger
Property="IsMouseOver" Value="true">
            //            <Setter
Property="Foreground" Value="Black" />
            //            <Setter
Property="Background">

           
//                <Setter.Value>

           
//                    <LinearGradientBrush StartPoint="0,0"
EndPoint="0,1">

           
//                       
<LinearGradientBrush.GradientStops>
           
//                            <GradientStop Color="#0E4791"
Offset="0"/>
           
//                            <GradientStop Color="#468DE2"
Offset="1"/>
           
//                       
</LinearGradientBrush.GradientStops>
            //                   
</LinearGradientBrush>

           
//                </Setter.Value>
            //           
</Setter>
            //            <Setter
Property="Cursor" Value="Hand"/>
            //       
</Trigger>
            //   
</Style.Triggers>

           
//</Style>

            //And here
is the C# code to achieve the above
            Style styleListBoxItem =
new Style(typeof(ListBoxItem));
           
styleListBoxItem.Setters.Add(new Setter
            {
               
Property=TextElement.FontSizeProperty,
               
Value=14.0
            });

           
//Trigger
            Trigger
triggerIsMouseOver  =
                new Trigger {
Property=ListBoxItem.IsMouseOverProperty, Value=true };

           
triggerIsMouseOver.Setters.Add(new Setter(ListBoxItem.ForegroundProperty,
Brushes.Black));

           
GradientStopCollection gradientStopsLinearBrush = new
GradientStopCollection();
           
gradientStopsLinearBrush.Add(
                new
GradientStop((Color)ColorConverter.ConvertFromString("#0E4791"),
0.0));
           
gradientStopsLinearBrush.Add(
                new
GradientStop((Color)ColorConverter.ConvertFromString("#468DE2"),
1.0));

           
LinearGradientBrush backgroundLinearBrush =
                new
LinearGradientBrush(gradientStopsLinearBrush)
            {
                StartPoint = new
Point(0,0),
                EndPoint = new
Point(0,1)
            };

            //Trigger
setters
           
triggerIsMouseOver.Setters.Add(
                new
Setter(ListBoxItem.BackgroundProperty, backgroundLinearBrush));
           
triggerIsMouseOver.Setters.Add(
                new
Setter(ListBoxItem.CursorProperty, Cursors.Hand));
           
styleListBoxItem.Triggers.Add(triggerIsMouseOver);

            return
styleListBoxItem;

        }

       
#endregion

        #region Create
Template In Code
  

     ///
<summary>
        /// Creates a a DataTemplate
in code,
        ///
just to show the difference between code and XAML
        ///
</summary>
        private DataTemplate
CreateDataTemplateInCode()
        {

            //XAML code is
as shown below, nice and simply really

                          
            //<DataTemplate
DataType="{x:Type local:Person}">

            //   
<StackPanel x:Name="spOuter" Orientation="Horizontal"
Margin="10">
            //        <Path
Name="pathSelected" Fill="White" Stretch="Fill" Stroke="White"
Width="15"
            //           
Height="20" Data="M0,0 L 0,10 L 5,5"
            //           
Visibility="Hidden"/>

            //       
<StackPanel x:Name="spInner" Orientation="Horizontal">
            //            <Label
Content="{Binding FirstName}" Foreground="Black"/>
            //           
<Ellipse Fill="Black" Height="5" Width="5"
            //                    
HorizontalAlignment="Center"
            //                    
VerticalAlignment="Center"/>
            //            <Label
Content="{Binding LastName}" Foreground="Black"/>
            //       
</StackPanel>
                  
            //   
</StackPanel>
              
            //   
<DataTemplate.Triggers>
            //       
<DataTrigger Binding="{Binding RelativeSource={RelativeSource
Mode=FindAncestor,
            //               
AncestorType={x:Type ListBoxItem}, AncestorLevel=1}, Path=IsSelected}"
Value="True">
            //            <Setter
TargetName="pathSelected" Property="Visibility" Value="Visible" 
/>
           
//        </DataTrigger>
            //   
</DataTemplate.Triggers>
              
           
//</DataTemplate>

            //And here
is the C# code to achieve the above
            DataTemplate
dataTemplate = new DataTemplate(typeof(Person));

           
FrameworkElementFactory spOuterFactory =
                new
FrameworkElementFactory(typeof(StackPanel));
           
spOuterFactory.SetValue(
               
StackPanel.OrientationProperty, Orientation.Horizontal);
           
spOuterFactory.SetValue(
               
StackPanel.MarginProperty, new Thickness(10));

            #region
Path
           
FrameworkElementFactory pathSelectedFactory =
                new
FrameworkElementFactory(typeof(Path), "pathSelected");

           
pathSelectedFactory.SetValue(Path.FillProperty, Brushes.Orange);
           
pathSelectedFactory.SetValue(Path.StretchProperty,
Stretch.Fill);
           
pathSelectedFactory.SetValue(Path.StrokeProperty,
Brushes.Orange);
           
pathSelectedFactory.SetValue(Path.WidthProperty, 15.0);
           
pathSelectedFactory.SetValue(Path.HeightProperty, 20.0);
           
pathSelectedFactory.SetValue(Path.VisibilityProperty,
Visibility.Hidden);

            PathGeometry
pathGeometry = new PathGeometry();
            pathGeometry.Figures =
new PathFigureCollection();
            PathFigure pathFigure =
new PathFigure();
            pathFigure.StartPoint =
new Point(0, 0);
            pathFigure.Segments =
new PathSegmentCollection();
           
pathFigure.Segments.Add(new LineSegment() { Point = new Point(0, 10)
});
           
pathFigure.Segments.Add(new LineSegment() { Point = new Point(5, 5)
});
           
pathGeometry.Figures.Add(pathFigure);

           
pathSelectedFactory.SetValue(Path.DataProperty, pathGeometry);
           
spOuterFactory.AppendChild(pathSelectedFactory);
            #endregion

            #region Inner
StackPanel
            FrameworkElementFactory
spInnerFactory = new
FrameworkElementFactory(typeof(StackPanel));
           
spInnerFactory.SetValue(StackPanel.OrientationProperty,
Orientation.Horizontal);

           
//FirstName
            FrameworkElementFactory
labelFNFactory = new FrameworkElementFactory(typeof(Label));
            Binding bindingFirstName
= new Binding();
            bindingFirstName.Path =
new PropertyPath("FirstName");
           
labelFNFactory.SetBinding(Label.ContentProperty,
bindingFirstName);
           
labelFNFactory.SetValue(Label.ForegroundProperty,
Brushes.Black);
           
spInnerFactory.AppendChild(labelFNFactory);

           
//Ellipse
            FrameworkElementFactory
ellipseFactory = new FrameworkElementFactory(typeof(Ellipse));
           
ellipseFactory.SetValue(Ellipse.FillProperty, Brushes.Black);
           
ellipseFactory.SetValue(Ellipse.HeightProperty, 5.0);
           
ellipseFactory.SetValue(Ellipse.WidthProperty, 5.0);
           
ellipseFactory.SetValue(Ellipse.HorizontalAlignmentProperty,
HorizontalAlignment.Center);
           
ellipseFactory.SetValue(Ellipse.VerticalAlignmentProperty,
VerticalAlignment.Center);
           
spInnerFactory.AppendChild(ellipseFactory);

           
//LastName
            FrameworkElementFactory
labelLNFactory = new FrameworkElementFactory(typeof(Label));
            Binding bindingLastName
= new Binding();
            bindingLastName.Path =
new PropertyPath("LastName");
           
labelLNFactory.SetBinding(Label.ContentProperty,
bindingLastName);
           
labelLNFactory.SetValue(Label.ForegroundProperty,
Brushes.Black);
           
spInnerFactory.AppendChild(labelLNFactory);

            //Add to outer
StackPanel
           
spOuterFactory.AppendChild(spInnerFactory);
            #endregion

            #region
DataTrigger
            DataTrigger dataTrigger
= new DataTrigger();
            dataTrigger.Binding =
new Binding {
                Path = new
PropertyPath(ListBoxItem.IsSelectedProperty),
                RelativeSource
=
                    new
RelativeSource(RelativeSourceMode.FindAncestor,
                   
typeof(ListBoxItem), 1)
            };
            dataTrigger.Value =
true;
           
dataTrigger.Setters.Add(
                new
Setter(FrameworkElement.VisibilityProperty,
                   
Visibility.Visible, "pathSelected"));

           
dataTemplate.Triggers.Add(dataTrigger);
            #endregion

           
dataTemplate.VisualTree = spOuterFactory;
            return
dataTemplate;
        }

       
#endregion