动态创建样式,动态生成style

Question

项目中碰到一个问题 ,现在需要动态生成 style 而不是在xaml 文件中写死的,那就是要new style 实现类似以下的xaml代码

       <Style x:Key="TransitionPageStyle" TargetType="phone:PhoneApplicationPage">
            <Setter Property="toolkit:TransitionService.NavigationInTransition">
                <Setter.Value>
                    <toolkit:NavigationInTransition>
                        <toolkit:NavigationInTransition.Backward>
                            <toolkit:TurnstileTransition Mode="BackwardIn"/>
                        </toolkit:NavigationInTransition.Backward>
                        <toolkit:NavigationInTransition.Forward>
                            <toolkit:TurnstileTransition Mode="ForwardIn"/>
                        </toolkit:NavigationInTransition.Forward>
                    </toolkit:NavigationInTransition>
                </Setter.Value>
            </Setter>
            <Setter Property="toolkit:TransitionService.NavigationOutTransition">
                <Setter.Value>
                    <toolkit:NavigationOutTransition>
                        <toolkit:NavigationOutTransition.Backward>
                            <toolkit:TurnstileTransition Mode="BackwardOut"/>
                        </toolkit:NavigationOutTransition.Backward>
                        <toolkit:NavigationOutTransition.Forward>
                            <toolkit:TurnstileTransition Mode="ForwardOut"/>
                        </toolkit:NavigationOutTransition.Forward>
                    </toolkit:NavigationOutTransition>
                </Setter.Value>
            </Setter>
        </Style>

我是这么写的 

public static Style getStyle() 
        {
            Style style = new Style();

            style.TargetType = typeof(System.Windows.Controls.Page);



            var na1 =  new  NavigationInTransition( );

            var tu1 =  new  TurnstileTransition() ;

            var tu2 = new TurnstileTransition();

            tu1.Mode = TurnstileTransitionMode.BackwardIn;

            tu2.Mode = TurnstileTransitionMode.ForwardIn;

            na1.SetValue(NavigationInTransition.BackwardProperty, tu1);
            na1.SetValue(NavigationInTransition.BackwardProperty, tu2);

            style.Setters.Add(new Setter(TransitionService.NavigationInTransitionProperty ,na1 ));


            var na2 = new NavigationInTransition();

            var tu3 = new TurnstileTransition();
            var tu4 = new TurnstileTransition();

            tu3.Mode = TurnstileTransitionMode.BackwardOut;
            tu4.Mode = TurnstileTransitionMode.ForwardOut;

            var w = na2.GetValue(NavigationInTransition.BackwardProperty);

            na2.SetValue(NavigationInTransition.BackwardProperty, tu3);
            na2.SetValue(NavigationInTransition.BackwardProperty, tu4);

            style.Setters.Add(new Setter(TransitionService.NavigationInTransitionProperty, na2));

            System.Diagnostics.Debug.WriteLine(style.ToString());


            return style; 
        }

但是没有效果 ,请问哪里错误?如果错了应该这么写?

Answer 1

style 有参考资料么?

Answer 2

你好，

如果你的目的是想通过后台代码动态改变style，可以使用类似于以下的方式来实现：

var dictionaries = Resources.MergedDictionaries; 
            dictionaries.Clear(); 
            var themeStyles = new ResourceDictionary 
            { 
                Source = new Uri(customTheme, UriKind.Relative) 
            }; 
dictionaries.Add(themeStyles);

http://www.cnblogs.com/jeekun/archive/2011/08/06/2129433.html

http://www.cnblogs.com/kiminozo/archive/2012/01/26/2329863.html

Answer 3

你好!

那些资料我看过,实际应用的时候就是要new style ,我想知道我写的那里有问题?正确的该怎么写?

Answer 4

原理上是这么写，为style添加一个key，然后尝试应用该style。

Answer 5

请问解决了没有？