AI导航网
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(2) - 1.0实例之支持录音和回放的钢琴(Silverlight+ASP.NET AJAX+DLINQ)

分类：Silverlight作者：编程之家
  [源码下载]

稳扎稳打Silverlight(2) - 1.0实例之支持录音和回放的钢琴(Silverlight+ASP.NET AJAX+DLINQ)

作者： webabcd
介绍
用Silverlight 1.0实现一个可以用鼠标或键盘弹奏，并且支持录音和回放的钢琴。(Silverlight+ASP.NET AJAX+DLINQ)
参考： http://silverlight.net/community/communitygallery.aspx
示例
Piano.xaml（用Expression Blend开发）

< Canvas

     xmlns ="http://schemas.microsoft.com/client/2007"

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

    x:Name ="Piano"  

    Width ="1024"  Height ="500" >

     < Image  Source ="Image/bg.jpg"  Height ="500"  Width ="1024" />


     < Image  x:Name ="imgC"  Height ="500"  Width ="1024"  Canvas.Top ="0"  Source ="Image/C.jpg"  Opacity ="0" />

     < Image  x:Name ="imgC2"  Height ="500"  Width ="1024"  Canvas.Top ="0"  Source ="Image/C2.jpg"  Opacity ="0" />

     < Image  x:Name ="imgD"  Height ="500"  Width ="1024"  Canvas.Top ="0"  Source ="Image/D.jpg"  Opacity ="0" />

     < Image  x:Name ="imgD2"  Height ="500"  Width ="1024"  Canvas.Top ="0"  Source ="Image/D2.jpg"  Opacity ="0" />

     < Image  x:Name ="imgE"  Height ="500"  Width ="1024"  Canvas.Top ="0"  Source ="Image/E.jpg"  Opacity ="0" />

     < Image  x:Name ="imgF"  Height ="500"  Width ="1024"  Canvas.Top ="0"  Source ="Image/F.jpg"  Opacity ="0" />

     < Image  x:Name ="imgF2"  Height ="500"  Width ="1024"  Canvas.Top ="0"  Source ="Image/F2.jpg"  Opacity ="0" />

     < Image  x:Name ="imgG"  Height ="500"  Width ="1024"  Canvas.Top ="0"  Source ="Image/G.jpg"  Opacity ="0" />

     < Image  x:Name ="imgG2"  Height ="500"  Width ="1024"  Canvas.Top ="0"  Source ="Image/G2.jpg"  Opacity ="0" />

     < Image  x:Name ="imgA"  Height ="500"  Width ="1024"  Canvas.Top ="0"  Source ="Image/A.jpg"  Opacity ="0" />

     < Image  x:Name ="imgA2"  Height ="500"  Width ="1024"  Canvas.Top ="0"  Source ="Image/A2.jpg"  Opacity ="0" />

     < Image  x:Name ="imgB"  Height ="500"  Width ="1024"  Canvas.Top ="0"  Source ="Image/B.jpg"  Opacity ="0" />


     < MediaElement  x:Name ="C"  Autoplay ="false"  Source ="Media/C.wma" />

     < MediaElement  x:Name ="C2"  Autoplay ="false"  Source ="Media/C2.wma" />

     < MediaElement  x:Name ="D"  Autoplay ="false"  Source ="Media/D.wma" />

     < MediaElement  x:Name ="D2"  Autoplay ="false"  Source ="Media/D2.wma" />

     < MediaElement  x:Name ="E"  Autoplay ="false"  Source ="Media/E.wma" />

     < MediaElement  x:Name ="F"  Autoplay ="false"  Source ="Media/F.wma" />

     < MediaElement  x:Name ="F2"  Autoplay ="false"  Source ="Media/F2.wma" />

     < MediaElement  x:Name ="G"  Autoplay ="false"  Source ="Media/G.wma" />

     < MediaElement  x:Name ="G2"  Autoplay ="false"  Source ="Media/G2.wma" />

     < MediaElement  x:Name ="A"  Autoplay ="false"  Source ="Media/A.wma" />

     < MediaElement  x:Name ="A2"  Autoplay ="false"  Source ="Media/A2.wma" />

     < MediaElement  x:Name ="B"  Autoplay ="false"  Source ="Media/B.wma" />


     < Canvas  x:Name ="pathCanvas" >

         < Path  x:Name ="CPath"  Opacity ="0.01"  Fill ="#FFFFFFFF"  Stretch ="Fill"  stroke ="#FF000000"  Width ="161.666656494141"  Height ="272.333312988281"  Canvas.Left ="135.5"  Canvas.Top ="138.83332824707"  Data ="M272.66667,140 L136,330 147.33333,336 162.66667,410.66667 247.33333,410 234.66667,330.66667 278,248 254,242.66667 258.66667,200.66667 296.66667,139.33333 272.66667,140"   />

         < Path  x:Name ="C2Path"  Opacity ="0.01"  Fill ="#FFFFFFFF"  Stretch ="Fill"  stroke ="#FF000000"  Width ="91"  Height ="136.333319306374"  Canvas.Left ="263.5"  Canvas.Top ="105.500005066396"  Data ="M325.33333,106.66667 L264,202.66667 266,241.33333 307.33333,238.66667 354,138 351.33333,106.66666 326.66667,106"   />

         < Path  x:Name ="dpath"  Opacity ="0.01"  Fill ="#FFFFFFFF"  Stretch ="Fill"  stroke ="#FF000000"  Width ="131"  Height ="274.333297729492"  Canvas.Left ="247.499999999999"  Canvas.Top ="137.499984741212"  Data ="M358,142.66667 L311.33333,243.33333 288.66667,246 248,330.66667 258,338 266.66667,411.33333 354,410.66665 347.33333,330.66668 374,246.66668 350,243.33336 352.66667,202.66669 378,138.00005 360.66667,140.00005"   />

         < Path  x:Name ="D2Path"  Opacity ="0.01"  Fill ="#FFFFFFFF"  Stretch ="Fill"  stroke ="#FF000000"  Width ="70.3333129882813"  Height ="134.333319425583"  Canvas.Left ="356.83334350586"  Canvas.Top ="107.500003457069"  Data ="M394.66667,108.66667 L357.33333,204 359.33333,241.33333 398,240.66667 426.66667,134.66667 425.33333,108"   />

         < Path  x:Name ="EPath"  Opacity ="0.01"  Fill ="#FFFFFFFF"  Stretch ="Fill"  stroke ="#FF000000"  Width ="117.666656494141"  Height ="274.333343505859"  Canvas.Left ="358.833343505859"  Canvas.Top ="137.5"  Data ="M431.33333,140 L403.33333,245.33333 381.33333,248 359.33333,330 368.66667,339.33333 372,411.33333 458,411.33333 455.33333,331.33333 476,138 433.33333,138.66667"   />

         < Path  x:Name ="FPath"  Opacity ="0.01"  Fill ="#FFFFFFFF"  Stretch ="Fill"  stroke ="#FF000000"  Width ="99.6666564941406"  Height ="273.666680037975"  Canvas.Left ="470.83334350586"  Canvas.Top ="138.833345949649"  Data ="M486.66667,140.66667 L471.33333,332 477.33333,334 476.66667,412 563.33333,411.33335 564,339.33334 570,328 560,246.66665 535.33333,243.33331 530,139.3333 486.66667,139.33329"   />

         < Path  x:Name ="F2Path"  Opacity ="0.01"  Fill ="#FFFFFFFF"  Stretch ="Fill"  stroke ="#FF000000"  Width ="51"  Height ="133.666656494141"  Canvas.Left ="534.166687011719"  Canvas.Top ="108.16665649414"  Data ="M538.66667,109.33333 L534.66667,137.33333 542,241.33333 584,240.66666 584.66667,205.33334 568,108.66667 540.66667,108.66668"   />

         < Path  x:Name ="GPath"  Opacity ="0.01"  Fill ="#FFFFFFFF"  Stretch ="Fill"  stroke ="#FF000000"  Width ="111"  Height ="274.333343505859"  Canvas.Left ="570.166687011719"  Canvas.Top ="137.5"  Data ="M570.66667,248 L582.66667,336 582,411.33333 669.33333,410.66667 672.66667,332.66667 680.66667,330 655.33333,245.33333 631.33333,244 601.33333,138 578.66667,138 594.66667,244.66667 571.33333,248"   />

         < Path  x:Name ="G2Path"  Opacity ="0.01"  Fill ="#FFFFFFFF"  Stretch ="Fill"  stroke ="#FF000000"  Width ="76.3333129882813"  Height ="131.666656494141"  Canvas.Left ="603.5"  Canvas.Top ="110.166664123534"  Data ="M612,111.33333 L604,136.66667 636,238.66667 636.66667,241.33333 679.33333,206.66667 641.33333,111.33334 612.66667,110.66668"   />

         < Path  x:Name ="APath"  Opacity ="0.01"  Fill ="#FFFFFFFF"  Stretch ="Fill"  stroke ="#FF000000"  Width ="138.333312988281"  Height ="274.333343505859"  Canvas.Left ="655.5"  Canvas.Top ="137.5"  Data ="M665.33333,246 L694.66667,336.66667 686,411.33333 774.66667,410 785.33333,335.33333 793.33333,328.66667 750.66667,246.66667 722,243.33333 673.33333,138 656,138.66667 688.66667,216.66667 685.33333,245.33333 666,246"   />

         < Path  x:Name ="A2Path"  Opacity ="0.01"  Fill ="#FFFFFFFF"  Stretch ="Fill"  stroke ="#FF000000"  Width ="95"  Height ="131"  Canvas.Left ="676.166687011719"  Canvas.Top ="110.833320617675"  Data ="M682,111.33333 L676.66667,138.66667 730.66667,240.66667 768.66667,241.33333 770.66667,204.00001 713.33333,111.33334 683.33333,111.33335"   />

         < Path  x:Name ="BPath"  Opacity ="0.01"  Fill ="#FFFFFFFF"  Stretch ="Fill"  stroke ="#FF000000"  Width ="172.333312988281"  Height ="275.666687011719"  Canvas.Left ="733.5"  Canvas.Top ="136.833320051431"  Data ="M758,247.33333 L806,333.33333 790,412 878,412 894.66667,334 905.33333,327.33333 764.66667,138.66667 734,137.33333 776.66667,207.33334 778.66667,246.66668 758.66667,248"   />

     </ Canvas >


     < Ellipse  x:Name ="stopRecord"   Height ="30"  Width ="30"  Canvas.Left ="40"  Canvas.Top ="430"

      stroke ="Black"  strokeThickness ="3"  Fill ="Red" />

     < Ellipse  x:Name ="startRecord"   Height ="30"  Width ="30"  Canvas.Left ="80"  Canvas.Top ="430"

      stroke ="Black"  strokeThickness ="3"  Fill ="Green" />


     < Canvas  Width ="60"  Height ="30"  Canvas.Left ="760"  Canvas.Top ="422"  Cursor ="Hand" >

         < TextBlock  x:Name ="play"  textwrapping ="Wrap"  FontSize ="28"  Foreground ="#FF4C7185"  Text ="Play" >

         </ TextBlock >

     </ Canvas >


     < TextBlock  x:Name ="lblMussicBook"  textwrapping ="Wrap"  Canvas.Left ="120"  Canvas.Top ="434"  FontSize ="14"  Foreground ="#FFFFFFFF"  Text ="MusicBook:" >

     </ TextBlock >

     < TextBlock  x:Name ="lblName"  textwrapping ="Wrap"  Canvas.Left ="520"  Canvas.Top ="434"  FontSize ="14"  Foreground ="#FFFFFFFF"  Text ="Name:" >

     </ TextBlock >

</ Canvas >

Piano.xaml.js

if  ( ! window.Piano)

    window.Piano  =   {} ;


Piano.Page  =   function () 

 {

}


Piano.Page.prototype  =

{

    handleLoad: function(control, userContext, rootElement) 

    {

        this.control = control;

        

        // Sample event hookup:    

        rootElement.addEventListener("MouseLeftButtonDown", Silverlight.createDelegate(this, this.handleMouseDown));

    },

    

    // Sample event handler

    handleMouseDown: function(sender, eventArgs) 

    {

        // The following line of code shows how to find an element by name and call a method on it.

        // this.control.content.findName("Timeline1").Begin();

    }

}

Default.aspx

@H_502_2032@

<% @ Page Language="C# MasterPageFile~/Site.master AutoEventWireuptrue CodeFileDefault.aspx.cs

    Inherits_10_Piano_Default Title支持录音和回放的钢琴  %>


< asp:Content  ID ="Content1"  ContentPlaceHolderID ="head"  runat ="Server" >


     < script  type ="text/javascript"  src ="../Silverlight.js" ></ script >


     < script  type ="text/javascript"  src ="Default.aspx.js" ></ script >


     < script  type ="text/javascript"  src ="Piano.xaml.js" ></ script >


     < script  type ="text/javascript"  src ="Piano.js" ></ script >


     < style  type ="text/css" >

        .silverlightHost

        {

            height: 500px;

            width 1024px

        }

     </ style >

</ asp:Content >

< asp:Content  ID ="Content2"  ContentPlaceHolderID ="ContentPlaceHolder1"  runat ="Server" >

     < asp:ScriptManager  ID ="ScriptManager1"  runat ="server" >

     </ asp:ScriptManager >

     < div  id ="SilverlightControlHost"  class ="silverlightHost" >


         < script  type ="text/javascript" >

            var txtInput  '<%= txtInput.ClientID %>';

             txtName  txtName.ClientID ';

            createSilverlight();

         </ script >


         < asp:UpdateProgress  ID ="UpdateProgress1"  runat ="server" >

             < Progresstemplate >

                 < div  style ="position: absolute; top: 0px; background-color: Red; color: White; z-index: 999" >

                    Loading

@H_668_2502@

 </ div >

             </ Progresstemplate >

         </ asp:UpdateProgress >

         < asp:UpdatePanel  ID ="UpdatePanel1"  runat ="server" >

             < ContentTemplate >

                 < asp:GridView  ID ="GridView1"  runat ="server"  Style ="position: absolute; top: 0px;

                    width: 1024px"  AllowPaging ="True"  AllowSorting ="True"  AutoGenerateColumns ="False"

                    DataKeyNames ="ID"  DataSourceID ="LinqDataSource1"  RowStyle-HorizontalAlign ="Center"

                    PageSize ="2"  OnSelectedindexChanged ="GridView1_SelectedindexChanged" >

                     < Columns >

                         < asp:CommandField  ShowSelectButton ="True"  HeaderText ="选择"  ItemStyle-Width ="40px" ></ asp:CommandField >

                         < asp:CommandField  ShowDeleteButton ="True"  HeaderText ="删除"  ItemStyle-Width ="40px" ></ asp:CommandField >

                         < asp:BoundField  datafield ="ID"  HeaderText ="ID"  InsertVisible ="False"  ReadOnly ="True"

                            SortExpression ="ID"  ItemStyle-Width ="40px" ></ asp:BoundField >

                         < asp:BoundField  datafield ="Name"  HeaderText ="名称"  SortExpression ="Name" ></ asp:BoundField >

                         < asp:TemplateField  HeaderText ="乐谱"  SortExpression ="Details"  ItemStyle-Width ="700px" >

                             < ItemTemplate >

                                 < div  style ="overflow: hidden; width: 666px" >

                                     < asp:Label  ID ="lblDetails"  runat ="server"  Text ='<%#  Bind("Details") % > '> </ asp:Label >

                                 </ div >

                             </ ItemTemplate >

                         </ asp:TemplateField >

                     </ Columns >

                 </ asp:GridView >

                 < asp:TextBox  ID ="txtInput"  runat ="server"  Style ="position: absolute; left: 200px;

                    top: 434px; width: 300px"   />

                 < asp:TextBox  ID ="txtName"  runat ="server"  Style ="position: absolute; left: 566px;

                    top: 434px;"   />

             </ ContentTemplate >

             < Triggers >

                 < asp:AsyncPostBackTrigger  ControlID ="btnAdd"   />

             </ Triggers >

         </ asp:UpdatePanel >

         < asp:LinqDataSource  ID ="LinqDataSource1"  runat ="server"  ContextTypeName ="Data.MusicBookDataContext"

            EnableDelete ="True"  TableName ="MusicBook" >

         </ asp:LinqDataSource >

         < asp:Button  ID ="btnAdd"  runat ="server"  Text ="添加"  Style ="position: absolute; left: 710px;

            top: 434px;"  OnClick ="btnAdd_Click"   />

     </ div >

</ asp:Content >


Default.aspx.cs

using  System;

 using  System.Data;

 using  System.Configuration;

 using  System.Collections;

 using  System.Linq;

 using  System.Web;

 using  System.Web.Security;

 using  System.Web.UI;

 using  System.Web.UI.WebControls;

 using  System.Web.UI.WebControls.WebParts;

 using  System.Web.UI.HtmlControls;

 using  System.Xml.Linq;


 public  partial  class  _10_Piano_Default : System.Web.UI.Page

 {

    protected void Page_Load(object sender, EventArgs e)

    {


    }


    protected void btnAdd_Click(object sender, EventArgs e)

    {

        Data.MusicBookDataContext mbdc = new Data.MusicBookDataContext();

        Data.MusicBook mb = new Data.MusicBook();


        mb.Name = txtName.Text;

        mb.Details = txtInput.Text;


        mbdc.MusicBook.Add(mb);

        mbdc.SubmitChanges();


        txtName.Text = "";

        txtInput.Text = "";


        GridView1.DataBind();

    }


    protected void GridView1_SelectedindexChanged(object sender, EventArgs e)

    {

        txtName.Text = GridView1.Rows[GridView1.Selectedindex].Cells[3].Text;

        txtInput.Text = ((Label)GridView1.Rows[GridView1.Selectedindex].Cells[4].FindControl("lblDetails")).Text;

    }

}


Default.aspx.js

function  createSilverlight()

 {

    var scene = new Webabcd.Piano();

    Silverlight.createObjectEx({

        source: "Piano.xaml",

        parentElement: document.getElementById("SilverlightControlHost"),

        id: "SilverlightControl",

        properties: {

            width: "100%",

            height: "100%",

            version: "1.0",

            iswindowless: "true"

        },

        events: {

            onLoad: Silverlight.createDelegate(scene, scene.handleLoad)

        }

    });

}



if  ( ! window.Silverlight) 

    window.Silverlight  =   {} ;


Silverlight.createDelegate  =   function (instance, method)  {

    return function() {

        return method.apply(instance, arguments);

    }

}

Piano.js

if  ( ! window.Webabcd)

    window.Webabcd  =   {} ;


Webabcd.Piano  =  function() 

 {

}


Webabcd.Piano.prototype  =

{

    handleLoad: function(control, rootElement) 

    {

        // plugin（插件）

        this.control = control;

        

        // 根Canvas元素

        this.rootElement = rootElement;

        

        // object.addEventListener(eventName, functionReference)为对象添加一个事件监听器（事件名称，函数名称）

        // Silverlight.createDelegate用来创建一个调用“this”上下文下的特定函数的委托，其被定义在runtime

        // Silverlight.createDelegate = function(instance, method) 

        // {

        //   return function() 

        //   {

        //      return method.apply(instance, arguments);

        //    }

        // }

        this.rootElement.addEventListener("GotFocus", this.resetPiano));

        this.rootElement.addEventListener("KeyDown", this.handleKeyDown));

        this.rootElement.addEventListener("KeyUp", this.handleKeyUp));


        // 鼠标热区的Canvas

        // object.findName(name)

        this.pathCanvas = rootElement.findName("pathCanvas");   


        // 开始录制按钮

        this.startRecord = rootElement.findName("startRecord");   

        this.startRecord.addEventListener("MouseLeftButtonDown", this.handleStartRecord));


        // 停止录制按钮

        this.stopRecord = rootElement.findName("stopRecord");   

        this.stopRecord.addEventListener("MouseLeftButtonDown", this.handleStopRecord));

        

        // 默认为选中停止录制按钮

        // plugin.content.findName(objectName)

        document.getElementById('SilverlightControl').content.findName("stopRecord").stroke = "LightBlue";

        document.getElementById('SilverlightControl').content.findName("stopRecord").strokeThickness = 6;

        

        // 播放按钮

        this.play = rootElement.findName("play");   

        this.play.addEventListener("MouseLeftButtonDown", this.handlePlay));


        // object.children对应<Canvas>一个或多个子元素</Canvas>

        // object.getItem(index)获取集合内指定的对象

        // object.count集合内的成员数量

        for(var i = 0; i<this.pathCanvas.children.count; ++i)

        {

            // 为所有鼠标热区添加相关的事件监听器

            this.pathCanvas.children.getItem(i).addEventListener("MouseLeftButtonDown", this.handleMouseDown));

            this.pathCanvas.children.getItem(i).addEventListener("MouseLeftButtonUp", this.handleMouseUp));

        }

        

        // 是否启用录制

        this._enableRecord = false;

        // 上一次按键的时间

        this._prevTime = new Date().getTime();

    },

    

    // 单击开始录制按钮

    handleStartRecord: function(sender, eventArgs) 

    {

        // 设置开始录制按钮样式

        sender.stroke = 'LightBlue';

        sender.strokeThickness = 6;

        

        // 设置停止录制按钮样式

        document.getElementById('SilverlightControl').content.findName("stopRecord").stroke = "Black";

        document.getElementById('SilverlightControl').content.findName("stopRecord").strokeThickness = 3;

        

        // 启用录音

        this._enableRecord = true;

        // 记录时间

        this._prevTime = new Date().getTime();

    },

    

    // 单击停止录制按钮

    handleStopRecord: function(sender, eventArgs) 

    {

        // 设置停止录制按钮样式

        sender.stroke = 'LightBlue';

        sender.strokeThickness = 6;


        // 设置开始录制按钮样式

        document.getElementById('SilverlightControl').content.findName("startRecord").stroke = "Black";

        document.getElementById('SilverlightControl').content.findName("startRecord").strokeThickness = 3;


        // 清空乐谱名称和乐谱内容

        document.getElementById(txtInput).value = '';

        document.getElementById(txtName).value = '';

        

        // 停止录音

        this._enableRecord = false;

    },

    

    // 单击播放按钮

    handlePlay: function(sender, eventArgs) 

    {

        // 根据乐谱自动播放

        autoplay(this, 0);

    },

    

    // 记录乐谱

    handleRecord: function(currentPianoKeyID)

    {

        if (this._enableRecord)

        {

            // 插入乐谱

            document.getElementById(txtInput).value += new Date().getTime() - this._prevTime + ',';

            document.getElementById(txtInput).value += currentPianoKeyID + ';';


            // 更新时间

            this._prevTime = new Date().getTime();

        }

    },

    

    handleMouseDown: function(sender, eventArgs) 

    {

        // object.captureMouse()为对象启用鼠标捕捉（鼠标离开热区也可触发相关事件，如MouseLeftButtonUp）

        sender.captureMouse();

        

        var currentPianoKeyID = sender.name.substr(0, sender.name.indexOf("Path"));

        var currentimage = sender.findName("img" + currentPianoKeyID);

        currentimage.opacity = 1;

        

        var currentMediaElement = sender.findName(currentPianoKeyID);

        currentMediaElement.stop();

        currentMediaElement.play();

        

        this.handleRecord(currentPianoKeyID);

    },

    

    handleMouseUp: function(sender, eventArgs) 

    {

        // object.releaseMouseCapture()释放对象的鼠标捕捉

        sender.releaseMouseCapture();

        

        var currentPianoKeyID = sender.name.substr(0, sender.name.indexOf("Path"));

        var currentimage = sender.findName("img" + currentPianoKeyID);

        currentimage.opacity = 0;

    },


    pressKey: function (currentPianoKeyID)

    {

        var currentimage = this.control.content.findName("img" + currentPianoKeyID);

        currentimage.opacity = 1;

        

        var currentMediaElement = this.control.content.findName(currentPianoKeyID);

        // object.play()播放，object.pause()暂停，object.stop()停止

        currentMediaElement.stop();

        currentMediaElement.play();

    },


    depressKey: function (currentPianoKeyID)

    {

        var currentimage = this.control.content.findName("img" + currentPianoKeyID);

        currentimage.opacity = 0;

    },


    handleKeyDown: function (sender, eventArgs)

    {

        switch (eventArgs.Key)

        {

            // eventArgs.Key - 获取与该事件相关的键盘按键

            case 55: this.pressKey("C"); this.handleRecord("C"); break;

            case 48: this.pressKey("C2"); this.handleRecord("C2"); break;

            case 53: this.pressKey("D");  this.handleRecord("D"); break;

            case 33: this.pressKey("D2"); this.handleRecord("D2"); break;

            case 32: this.pressKey("E");  this.handleRecord("E"); break;

            case 51: this.pressKey("F");  this.handleRecord("F"); break;

            case 36: this.pressKey("F2"); this.handleRecord("F2"); break;

            case 31: this.pressKey("G");  this.handleRecord("G"); break;

            case 37: this.pressKey("G2"); this.handleRecord("G2"); break;

            case 43: this.pressKey("A");  this.handleRecord("A"); break;

            case 39: this.pressKey("A2"); this.handleRecord("A2"); break;

            case 42: this.pressKey("B");  this.handleRecord("B"); break;

        }

    },


    handleKeyUp: function (sender, eventArgs)

    {

        switch (eventArgs.Key)

        {

            // eventArgs.Key - 获取与该事件相关的键盘按键

            case 55: this.depressKey("C");  break;

            case 48: this.depressKey("C2"); break;

            case 53: this.depressKey("D");  break;

            case 33: this.depressKey("D2"); break;

            case 32: this.depressKey("E");  break;

            case 51: this.depressKey("F");  break;

            case 36: this.depressKey("F2"); break;

            case 31: this.depressKey("G");  break;

            case 37: this.depressKey("G2"); break;

            case 43: this.depressKey("A");  break;

            case 39: this.depressKey("A2"); break;

            case 42: this.depressKey("B");  break;

        }

    },

    

    resetPiano: function(sender, eventArgs) 

    {

        this.depressKey("C");

        this.depressKey("C2");

        this.depressKey("D");

        this.depressKey("D2");

        this.depressKey("E");

        this.depressKey("F");

        this.depressKey("F2");

        this.depressKey("G");

        this.depressKey("G2");

        this.depressKey("A");

        this.depressKey("A2");

        this.depressKey("B");

    }

}



var _obj;  //  Webabcd.Piano对象

var _index;  //  乐谱索引

function autoplay(obj, index)

 {

    _obj = obj;

    _index = index;

    

    execAutoplay();

}


function execAutoplay()

 {

    _obj.resetPiano();


    var str = document.getElementById(txtInput).value; // 乐谱

    var ary = str.split(';'); // 间隔时间，按键名称

    

    if (_index != 0 && typeof(ary[_index-1]) != 'undefined' && ary[_index-1] != '')

    {

        // 按下当前乐谱索引的上一个索引的按键

        _obj.pressKey(ary[_index-1].split(',')[1]); 

    }

     

    var currentIndex = _index;   

    _index++;

    

    if (typeof(ary[currentIndex]) != 'undefined')

    {

        setTimeout("_obj.resetPiano();", 100)

        // 经过当前乐谱索引的间隔时间则调用execAutoplay()

        setTimeout("execAutoplay();", parseInt(ary[currentIndex].split(',')[0], 10)); 

    }

}


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

c# – 如何在Silverlight 4中绑定ContextMenu的IsEnabled属性？
如何在Silverlight4(XAML)中绑定IsEnabled属性？我试过简单的IsEnabled=“{BindingABC}”,但这不起作用–MenuItem总是启用.提前感谢您的线索！干杯编辑：有趣的是,当设置Mode=TwoWay时,绑定似乎有效.但是,在菜单项上...
c# – 使用Silverlight / windows手机式控件设置我的.Net桌面应用程序GUI
我正在编写我的第一个vb.net应用程序(但我也会在这里标记c#,因为我确信即使是一个c#人也可以使用类似的.net实现来回答这个问题).我申请的简短说明：我的桌面应用程序将仅在win平台上运行,使用vb.net,它是一个简单的网...
c# – Silverlight：将服务调用和文件处理移动到后台线程
ProcessFile()是在UIThread上运行还是在单独的线程上运行.如果它在UIThread上,如何将文件请求和ProcessFile()移动到单独的线程？varxClient=newServiceReference1.Service1SoapClient();xClient.Retrieve_File_Compl...
c# – 如何从ASP.NET / Silverlight开发人员成为sharepoint开发人员？
我从同行那里听说,对sharepoint的了解对职业生涯有益.我们不在办公室使用sharepoint.所以不知道如何开始.这些是我的新手问题>学习共享点值得努力吗？>学习sharepoint的资源在哪里？>我是否应该考虑开发哪些...
c# – Windows Phone 8 – 将列表保存到IsolatedStorage
我正在尝试保存一个类我的类对象的集合.我收到一个错误说明：Thecollectiondatacontracttype‘System.Collections.Generic.Listcannotbedeserializedbecauseitdoesnothaveapublicparameterlessconstructor.Addingapu...
c# – 在XAML中使用绑定设置样式
我需要根据Silverlight中的某些配置值设置给定控件的Style.我想有可能从两种可用的样式(静态资源)中选择一个控件样式.我试图做一些像：<TextBoxStyle="{BindingABC}"/>哪里publicstringABC{get{retu...
Android设备上的Silverlight / Moonlight
我刚买了第一台Android设备,我喜欢它…我也很喜欢你可以创建自己的应用程序并随意分发它们.我已经阅读了一些关于Monodroid的内容,而且显然微软希望将Silverlight放在这些设备上,尽管没有太多关于它们的信息……但是M...
c# – 从silverlight应用程序访问SQL Server数据库
我们的ASP.NET网站允许用户执行各种查询,并根据从数据库查询的结果显示网络图(如UML图).目前,我们正在生成一个位图并显示它.但由于我们需要支持允许用户以交互方式显示/隐藏某些块的功能,因此我们计划使用Silverligh...
c# – 自定义Silverlight启动画面导致白屏死机
我正在开发一个Silverlight4应用程序,我已经创建了一个自定义的启动画面.乍一看,自定义启动画面运行良好–非常好.几天后,我开始注意到闪屏不再显示,屏幕仍然是空白.这似乎只发生在我打开多个指向同一个应用程序的IE选...
c# – 使用带偏移的RotateTransform问题旋转图像
这是我的XAML：<ImageVerticalAlignment="Center"HorizontalAlignment="Center"Source="{BindingInput,Converter={StaticResourceByteArrayToBitmapConverter}}"><Image.Ren...
    pythonJavaScriptjavaHTMLreactjsC#AndroidCSSNode.jssqlrpython-3.xMysqLjQueryc++pandasFlutterangularIOSdjangolinuxswifttypescript路由器JSON路由器设置无线路由器h3c华三华三路由器设置华三路由器电脑软件教程arraysdocker软件图文教程Cvue.jslaravelspring-bootreact-native