WPF 动态加载主题由zip

1  PackageStore.AddPackage(new Uri("customtheme://"), Package.Open("123.zip"));
2 PackageStore.RemovePackage(new Uri("customtheme://")); 

 1  public MainWindow()
 2         {
 3             InitializeComponent();
 4             //PackageStore.AddPackage(new Uri("customtheme://"), Package.Open("123.zip"));
 5             cmbThemes.ItemsSource = new DirectoryInfo(AppDomain.CurrentDomain.BaseDirectory + "\\Themes").EnumerateFileSystemInfos("*.customtheme", SearchOption.TopDirectoryOnly).Select((fi) => fi.FullName).ToList();
 6             
 7         }
 8 
 9         private void cmbThemes_SelectionChanged(object sender, SelectionChangedEventArgs e)
10         {
11             if (e.RemovedItems != null)
12             {
13                 foreach (var item in e.RemovedItems.OfType<string>())
14                 {
15                     PackageStore.RemovePackage(new Uri(System.IO.Path.GetFileName(item) + "://"));                                       
16                 }
17             }
18 
19 
20 
21             if (e.AddedItems != null)
22             {
23                 foreach (var item in e.AddedItems.OfType<string>())
24                 {
25                     Stream fileMapViewStream;
26                     try
27                     {
28                         //FileStream fs = File.Open(item.Replace("\\", ":"), FileMode.OpenOrCreate);
29                         fileMapViewStream = MemoryMappedFile.OpenExisting(item.Replace("\\", ":"), MemoryMappedFileRights.Read).CreateViewStream(0, new FileInfo(item).Length, MemoryMappedFileAccess.Read);
30                     }
31                     catch(IOException)
32                     {
33                         fileMapViewStream = MemoryMappedFile.CreateFromFile(item, FileMode.Open, item.Replace("\\", ":"), new FileInfo(item).Length, MemoryMappedFileAccess.Read).CreateViewStream(0, new FileInfo(item).Length, MemoryMappedFileAccess.Read); 
34                     }
35                     PackageStore.AddPackage(new Uri(System.IO.Path.GetFileName(item) + "://"), Package.Open(fileMapViewStream, FileMode.Open, FileAccess.Read));
36                     Application.Current.Resources.MergedDictionaries[0] = new ResourceDictionary() { Source = new Uri("pack://" + System.IO.Path.GetFileName(item) + ":,,,/ResourceDictionary.xaml") };
37                 }
38             }
39         }