折騰了半天，終于解決絕了運(yùn)行時(shí)Telerik Controls在運(yùn)行時(shí)修改主題的問(wèn)題。

　　1、首先建立StyleViewModel類，繼承INotifyPropertyChanged以實(shí)現(xiàn)雙向綁定；

    public sealed class StyleViewModel : INotifyPropertyChanged
     {
        private Theme selectedTheme;
        private readonly IEnumerable<Theme> themesSource = 

ThemeManager.StandardThemes.Select(a => a.Value);
 
       public Theme SelectedTheme
       {
            get {
               return this.selectedTheme ?? this.themesSource.First();
           }
          set {
             this.selectedTheme = value;
   ;&nbsp;           this.PropertyChanged

(this, new PropertyChangedEventArgs("SelectedTheme"));
         }
    }
 
      public IEnumerable<Theme> ThemesSource
     {
          get { return this.themesSource; }
       }
 
   public event PropertyChangedEventHandler PropertyChanged;
   }

2、修改App.xaml.cs

新建方法ResetRootVisual，用來(lái)重新繪制根節(jié)點(diǎn)

  private void ResetRootVisual()
    {
       var rootVisual = Application.Current.RootVisual as Grid;
          rootVisual.Children.Clear();
        rootVisual.Children.Add(new MainPage());
       }

修改Application_Startup，創(chuàng)建StyleViewModel對(duì)象，并響應(yīng)PropertyChanged事件

     private void Application_Startup(object sender, StartupEventArgs e)
   {
    this.customeStyle = new StyleViewModel();
     this.customeStyle.PropertyChanged&nbsp;+=

 new System.ComponentModel.PropertyChangedEventHandler

(customeStyle_PropertyChanged);

    this.RootVisual = new Grid();
   this.ResetRootVisual();
    }

   void customeStyle_PropertyChanged(object sender, 

System.ComponentModel.PropertyChangedEventArgs e)
    {
  StyleManager.ApplicationTheme = this.customeStyle.SelectedTheme;
     this.ResetRootVisual();
    }

新增GetCustomeStyle方法用于獲取customeStyle

  public StyleViewModel GetCustomeStyle()
  {
    return this.customeStyle;
  }

 3、創(chuàng)建界面控件

創(chuàng)建兩個(gè)CmoboBox控件并對(duì)他們的SelectedItem進(jìn)行雙向綁定，方便查看雙向綁定是否成功

   <telerik:RadComboBox HorizontalAlignment=

"Left" Margin="37,30,0,0" Name="radComboBox1&quot;

 VerticalAlignment="Top" Width="250" 
     ItemsSource="{Binding ThemesSource, Mode=OneTime}" SelectedItem="{Binding SelectedTheme, Mode=TwoWay}">
  </telerik:RadComboBox>
&nbsp; <telerik:RadComboBox HorizontalAlignment=

&quot;Left" Margin="316,30,0,0" Name=

"radComboBox2" VerticalAlignment="Top" Width="250" 
    ItemsSource="{Binding ThemesSource, Mode=OneTime}" SelectedItem="{Binding SelectedTheme, Mode=TwoWay}" >
  </telerik:RadComboBox>
<sdk:Label Height="28" HorizontalAlignment=

"Left"&nbsp;Margin="59,69,0,0" Name="label2" VerticalAlignment="Top"

 Width="120" Content="{Binding SelectedTheme, Mode=OneWay}"  />

 4、修改MainPage.xaml.cs，綁定DataContext

  public MainPage()
  {
  InitializeComponent();
           
  DataContext = (Application.Current as App).GetCustomeStyle();
}

5、最終效果圖

　　總結(jié)：這個(gè)方法的缺點(diǎn)在于每次更改樣式主題后都會(huì)重置用戶界面為初始界面，不能保存用戶的當(dāng)前狀態(tài)