微信公众号搜"智元新知"关注
微信扫一扫可直接关注哦!

稳扎稳打Silverlight(31) - 2.0Tip/Trick之加载XAP, 加载XAML, 加载DLL, AppManifest.xaml文件说明, 自定义鼠标指针

  [索引页]
[源码下载]

稳扎稳打Silverlight(31) - 2.0Tip/Trick之加载XAP,加载XAML,加载DLL,AppManifest.xaml文件说明,自定义鼠标指针

作者: webabcd
介绍
Silverlight 2.0 提示和技巧系列
  • 加载XAP - 加载指定的 xap 文件到当前的 Silverlight 应用程序中 
  • 加载XAML - 加载指定的 xaml 文件到当前的 Silverlight 应用程序中
  • 加载DLL - 加载指定的 dll 文件,并调用其中的方法或加载其中的控件
  • AppManifest.xaml文件说明 - 简要说明 AppManifest.xaml 文件内容中各个节点的作用 
  • 自定义鼠标指针 - 实现自定义的鼠标指针,即鼠标跟随

在线DEMO
http://www.cnblogs.com/webabcd/archive/2008/10/09/1307486.html  
示例
1、在 Silverlight 程序中加载指定的 xap 文件
LoadXap.xaml

< UserControl  x:Class ="Silverlight20.Tip.LoadXap"

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

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

    
< Grid  x:Name ="LayoutRoot"  Background ="White" >

        
< StackPanel >

            
< Button  x:Name ="load"  Content ="加载游戏 - 俄罗斯方块"  Click ="load_Click"  Margin ="5"   />

            
< Grid  x:Name ="container"  Margin ="5"   />

        
</ StackPanel >

    
</ Grid >

</ UserControl >


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 下载指定的 XAP

            WebClient client = new WebClient();

            client.OpenReadCompleted 
+= new OpenReadCompletedEventHandler(client_OpenReadCompleted);

            client.OpenReadAsync(uri);

        }


        
void client_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)

        
{

            
/*

             * StreamResourceInfo - 提供对通过 Silverlight 应用程序模型检索资源的支持

             * AssemblyPart - 包含在 Silverlight 程序内的程序集

             *     AssemblyPart.Load() - 加载指定的程序集到当前应用程序域中

             * Application.GetResourceStream() - 对 zip 类型的文件自动解压缩

             
*/


            
// YYTetris.xap 的 AppManifest.xaml 的信息如下

            /* 

            <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">

              <Deployment.Parts>

                <AssemblyPart x:Name="YYTetris" Source="YYTetris.dll" />

              </Deployment.Parts>

            </Deployment>    

            
*/


            
// 可以通过 Deployment.Current 检索 AppManifest.xaml 中的 Deployment 对象


            
// 取得 XAP 的 AppManifest.xaml 中的 Deployment.Parts 内的全部 AssemblyPart 节点信息

            StreamResourceInfo resource = App.GetResourceStream(

                
new StreamResourceInfo(e.Result, null), 

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

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

            List
<XElement> 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);

            }


            
// 实例化 YYTetris.xap 的主函数

            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 程序中加载指定的 xaml 文件
LoadXaml.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;


namespace  Silverlight20.Tip

{

    
public partial class LoadXaml : UserControl

    
{

        
public LoadXaml()

        
{

            InitializeComponent();


            
this.Loaded += new RoutedEventHandler(LoadXaml_Loaded);

        }


        
void LoadXaml_Loaded(object sender, RoutedEventArgs e)

        
{

            
// 获取指定的 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() - 加载 Xaml

                UserControl control =

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


                LayoutRoot.Children.Add(control);

            }

        }

    }

}


3、在 Silverlight 程序中加载指定的 dll 文件,并调用其中的方法或加载其中的控件
LoadDllDemo.Test.cs

using  System;

using  System.Net;

using  System.Windows;

using  System.Windows.Controls;

using  System.Windows.Documents;

using  System.Windows.Ink;

using  System.Windows.Input;

using  System.Windows.Media;

using  System.Windows.Media.Animation;

using  System.Windows.Shapes;


namespace  LoadDllDemo

{

    
public class Test

    
{

        
/// <summary>

        
/// Say Hello 的方法

        
/// </summary>

        
/// <param name="name">名字</param>

        
/// <returns></returns>

        public string Hello(string name)

        
{

            
return "Hello: " + name;

        }

    }

}


LoadDll.xaml

< UserControl  x:Class ="Silverlight20.Tip.LoadDll"

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

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

    
< Grid  x:Name ="LayoutRoot"  Background ="White" >

        

        
< TextBlock  x:Name ="lblResult"  Margin ="5"   />

        

    
</ Grid >

</ UserControl >


LoadDll.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.Reflection;


namespace  Silverlight20.Tip

{

    
public partial class LoadDll : UserControl

    
{

        
public LoadDll()

        
{

            InitializeComponent();


            
this.Loaded += new RoutedEventHandler(LoadDll_Loaded);

        }


        
void LoadDll_Loaded(object sender, RoutedEventArgs e)

        
{

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


            
// 用 WebClient 下载指定的 DLL

            WebClient client = new WebClient();

            client.OpenReadCompleted 
+= new OpenReadCompletedEventHandler(client_OpenReadCompleted);

            client.OpenReadAsync(uri);

        }


        
void client_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)

        
{

            
// 加载指定的 dll

            AssemblyPart assemblyPart = new AssemblyPart();

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


            
// 调用 LoadDllDemo.Test 的 Hello 方法,参数为 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() 用于把程序集加载到当前程序域

            
// 此特性可实现按需加载程序集(部署时,把这类的程序集从 xap 包中移除,用到时再调用指定发方法下载即可)

        }

    }

}


4、简要说明 AppManifest.xaml 文件内容中各个节点的作用

< 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" >

  
< Deployment.Parts >

    
< AssemblyPart  x:Name ="Silverlight20"  Source ="Silverlight20.dll"   />

    
< AssemblyPart  x:Name ="Microsoft.Windows.Controls"  Source ="Microsoft.Windows.Controls.dll"   />

  
</ Deployment.Parts >

</ Deployment >


一个 Silverlight 应用程序包(xap)内都会包含 AppManifest.xaml 文件,其内标识着打包的程序集和程序入口等信息


Deployment - 根节点

EntryPointAssembly - 程序入口的程序集

EntryPointType - 程序入口的类型

RuntimeVersion - 所需的 Silverlight 插件的版本

AssemblyPart - 标识 Silverlight 程序包(xap)内的程序集。其中的 Source 属性用于标识程序集的路径

5、自定义鼠标指针,即鼠标跟随
CustomMouseCursor.xaml

< UserControl  x:Class ="Silverlight20.Tip.CustomMouseCursor"

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

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

    
< Grid  x:Name ="LayoutRoot"  Background ="Bisque" >

        
< Canvas  x:Name ="canvas" >

            
< Ellipse  x:Name ="ellipse"  Width ="30"  Height ="30"  Fill ="Red"   />

        
</ Canvas >

    
</ Grid >

</ UserControl >


CustomMouseCursor.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;


namespace  Silverlight20.Tip

{

    
public partial class CustomMouseCursor : UserControl

    
{

        
public CustomMouseCursor()

        
{

            InitializeComponent();


            
this.MouseMove += new MouseEventHandler(MouseFollow_MouseMove);

        }


        
// 自定义鼠标指针的实现如下。鼠标跟随也是同理的做

        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
[源码下载]

版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 [email protected] 举报,一经查实,本站将立刻删除。

相关推荐