穩紮穩打Silverlight(31) - 2.0Tip/Trick之加載XAP, 加載XAML, 加載DLL, AppManifest.xaml檔案說明

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穩紮穩打Silverlight(31) - 2.0Tip/Trick之加載XAP, 加載XAML, 加載DLL, AppManifest.xaml檔案說明, 自定義滑鼠指針

介紹

Silverlight 2.0 提示和技巧系列

加載XAP - 加載指定的 xap 檔案到目前的 Silverlight 應用程式中 

加載XAML - 加載指定的 xaml 檔案到目前的 Silverlight 應用程式中

加載DLL - 加載指定的 dll 檔案，并調用其中的方法或加載其中的控件

AppManifest.xaml檔案說明 - 簡要說明 AppManifest.xaml 檔案内容中各個節點的作用 

自定義滑鼠指針 - 實作自定義的滑鼠指針，即滑鼠跟随

線上DEMO

<a href="http://webabcd.blog.51cto.com/1787395/342779">http://webabcd.blog.51cto.com/1787395/342779</a>

示例

1、在 Silverlight 程式中加載指定的 xap 檔案

LoadXap.xaml

&lt;UserControl x:Class="Silverlight20.Tip.LoadXap" 

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

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

        &lt;Grid x:Name="LayoutRoot" Background="White"&gt; 

                &lt;StackPanel&gt; 

                        &lt;Button x:Name="load" Content="加載遊戲 - 俄羅斯方塊" Click="load_Click" Margin="5" /&gt; 

                        &lt;Grid x:Name="container" Margin="5" /&gt; 

                &lt;/StackPanel&gt; 

        &lt;/Grid&gt; 

&lt;/UserControl&gt;

LoadXap.xaml.cs

using System; 

using System.Collections.Generic; 

using System.Linq; 

using System.Net; 

using System.Windows; 

using System.Windows.Controls; 

using System.Windows.Documents; 

using System.Windows.Input; 

using System.Windows.Media; 

using System.Windows.Media.Animation; 

using System.Windows.Shapes; 

using System.Windows.Resources; 

using System.IO; 

using System.Xml.Linq; 

using System.Reflection; 

namespace Silverlight20.Tip 

{ 

        public partial class LoadXap : UserControl 

        { 

                public LoadXap() 

                { 

                        InitializeComponent(); 

                } 

                private void load_Click(object sender, RoutedEventArgs e) 

                        Uri uri = new Uri("YYTetris.xap", UriKind.Relative); 

                        // 用 WebClient 下載下傳指定的 XAP 

                        WebClient client = new WebClient(); 

                        client.OpenReadCompleted += new OpenReadCompletedEventHandler(client_OpenReadCompleted); 

                        client.OpenReadAsync(uri); 

                void client_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e) 

                        /* 

                         * StreamResourceInfo - 提供對通過 Silverlight 應用程式模型檢索資源的支援 

                         * AssemblyPart - 包含在 Silverlight 程式内的程式集 

                         *         AssemblyPart.Load() - 加載指定的程式集到目前應用程式域中 

                         * Application.GetResourceStream() - 對 zip 類型的檔案自動解壓縮 

                         */ 

                        // YYTetris.xap 的 AppManifest.xaml 的資訊如下 

                        /*    

                        &lt;Deployment xmlns="http://schemas.microsoft.com/client/2007/deployment" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" EntryPointAssembly="YYTetris" EntryPointType="YYTetris.App" RuntimeVersion="2.0.31005.0"&gt; 

                            &lt;Deployment.Parts&gt; 

                                &lt;AssemblyPart x:Name="YYTetris" Source="YYTetris.dll" /&gt; 

                            &lt;/Deployment.Parts&gt; 

                        &lt;/Deployment&gt;         

                        */ 

                        // 可以通過 Deployment.Current 檢索 AppManifest.xaml 中的 Deployment 對象 

                        // 取得 XAP 的 AppManifest.xaml 中的 Deployment.Parts 内的全部 AssemblyPart 節點資訊 

                        StreamResourceInfo resource = App.GetResourceStream( 

                                new StreamResourceInfo(e.Result, null),    

                                new Uri("AppManifest.xaml", UriKind.Relative)); 

                        string resourceManifest = new StreamReader(resource.Stream).ReadToEnd(); 

                        List&lt;XElement&gt; assemblyParts = XDocument.Parse(resourceManifest).Root.Elements().Elements().ToList(); 

                        Assembly assembly = null; 

                        foreach (XElement element in assemblyParts) 

                        { 

                                // 取出 AssemblyPart 的 Source 指定的 dll 

                                string source = element.Attribute("Source").Value; 

                                AssemblyPart assemblyPart = new AssemblyPart(); 

                                StreamResourceInfo streamInfo = App.GetResourceStream( 

                                        new StreamResourceInfo(e.Result, "application/binary"), 

                                        new Uri(source, UriKind.Relative)); 

                                if (source == "YYTetris.dll") 

                                        assembly = assemblyPart.Load(streamInfo.Stream); 

                                else 

                                        assemblyPart.Load(streamInfo.Stream); 

                        } 

                        // 執行個體化 YYTetris.xap 的主函數 

                        var type = assembly.GetType("YYTetris.Page"); 

                        var yyTetris = Activator.CreateInstance(type) as UIElement; 

                        // 添加 YYTetris.xap 到指定的容器内，并更新 UI 

                        container.Children.Add(yyTetris); 

                        container.UpdateLayout(); 

        } 

}

2、在 Silverlight 程式中加載指定的 xaml 檔案

LoadXaml.xaml.cs

        public partial class LoadXaml : UserControl 

                public LoadXaml() 

                        this.Loaded += new RoutedEventHandler(LoadXaml_Loaded); 

                void LoadXaml_Loaded(object sender, RoutedEventArgs e) 

                        // 擷取指定的 Xaml 

                        Uri uri = new Uri("/Silverlight20;component/Tip/XamlDemo.xaml", UriKind.Relative); 

                        StreamResourceInfo resource = App.GetResourceStream(uri); 

                        using (StreamReader reader = new StreamReader(resource.Stream)) 

                                // XamlReader.Load() - 加載 Xaml 

                                UserControl control = 

                                        System.Windows.Markup.XamlReader.Load(reader.ReadToEnd()) as UserControl; 

                                LayoutRoot.Children.Add(control); 

3、在 Silverlight 程式中加載指定的 dll 檔案，并調用其中的方法或加載其中的控件

LoadDllDemo.Test.cs

using System.Windows.Ink; 

namespace LoadDllDemo 

        public class Test 

                /// &lt;summary&gt; 

                /// Say Hello 的方法 

                /// &lt;/summary&gt; 

                /// &lt;param name="name"&gt;名字&lt;/param&gt; 

                /// &lt;returns&gt;&lt;/returns&gt; 

                public string Hello(string name) 

                        return "Hello: " + name; 

LoadDll.xaml

&lt;UserControl x:Class="Silverlight20.Tip.LoadDll" 

                &lt;TextBlock x:Name="lblResult" Margin="5" /&gt; 

LoadDll.xaml.cs

        public partial class LoadDll : UserControl 

                public LoadDll() 

                        this.Loaded += new RoutedEventHandler(LoadDll_Loaded); 

                void LoadDll_Loaded(object sender, RoutedEventArgs e) 

                        Uri uri = new Uri("LoadDllDemo.dll", UriKind.Relative); 

                        // 用 WebClient 下載下傳指定的 DLL 

                        // 加載指定的 dll 

                        AssemblyPart assemblyPart = new AssemblyPart(); 

                        Assembly assembly = assemblyPart.Load(e.Result); 

                        // 調用 LoadDllDemo.Test 的 Hello 方法，參數為 webabcd 

                        Type type = assembly.GetType("LoadDllDemo.Test"); 

                        object obj = Activator.CreateInstance(type); 

                        MethodInfo methodInfo = type.GetMethod("Hello"); 

                        lblResult.Text = methodInfo.Invoke(obj, new object[] { "webabcd" }).ToString(); 

                        // 注： 

                        // AssemblyPart.Load() 用于把程式集加載到目前程式域 

                        // 此特性可實作按需加載程式集（部署時，把這類的程式集從 xap 包中移除，用到時再調用指定發方法下載下傳即可） 

4、簡要說明 AppManifest.xaml 檔案内容中各個節點的作用

&lt;Deployment xmlns="http://schemas.microsoft.com/client/2007/deployment" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" EntryPointAssembly="Silverlight20" EntryPointType="Silverlight20.App" RuntimeVersion="2.0.31005.0"&gt; 

    &lt;Deployment.Parts&gt; 

        &lt;AssemblyPart x:Name="Silverlight20" Source="Silverlight20.dll" /&gt; 

        &lt;AssemblyPart x:Name="Microsoft.Windows.Controls" Source="Microsoft.Windows.Controls.dll" /&gt; 

    &lt;/Deployment.Parts&gt; 

&lt;/Deployment&gt; 

一個 Silverlight 應用程式包（xap）内都會包含 AppManifest.xaml 檔案，其内辨別着打包的程式集和程式入口等資訊 

Deployment - 根節點 

EntryPointAssembly - 程式入口的程式集 

EntryPointType - 程式入口的類型 

RuntimeVersion - 所需的 Silverlight 插件的版本 

AssemblyPart - 辨別 Silverlight 程式包（xap）内的程式集。其中的 Source 屬性用于辨別程式集的路徑

5、自定義滑鼠指針，即滑鼠跟随

CustomMouseCursor.xaml

&lt;UserControl x:Class="Silverlight20.Tip.CustomMouseCursor" 

        &lt;Grid x:Name="LayoutRoot" Background="Bisque"&gt; 

                &lt;Canvas x:Name="canvas"&gt; 

                        &lt;Ellipse x:Name="ellipse" Width="30" Height="30" Fill="Red" /&gt; 

                &lt;/Canvas&gt; 

CustomMouseCursor.xaml.cs

        public partial class CustomMouseCursor : UserControl 

                public CustomMouseCursor() 

                        this.MouseMove += new MouseEventHandler(MouseFollow_MouseMove); 

                // 自定義滑鼠指針的實作如下。滑鼠跟随也是同理的做 

                void MouseFollow_MouseMove(object sender, MouseEventArgs e) 

                        ellipse.SetValue(Canvas.LeftProperty, e.GetPosition(canvas).X - ellipse.ActualWidth / 2); 

                        ellipse.SetValue(Canvas.TopProperty, e.GetPosition(canvas).Y - ellipse.ActualHeight / 2); 

OK

     本文轉自webabcd 51CTO部落格，原文連結：http://blog.51cto.com/webabcd/343949，如需轉載請自行聯系原作者