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稳扎稳打Silverlight(36) - 3.0控件之TreeView, ListBox增强, DataGrid增强, MediaElement增强

以太网光纤收发器 • 2022-5-25 • app • 阅读 40

稳扎稳打Silverlight(36) - 3.0控件之TreeView, ListBox增强, DataGrid增强, MediaElement增强,第1张

概述[索引页] [源码下载] 稳扎稳打Silverlight(36) - 3.0控件之TreeView, ListBox增强, DataGrid增强, MediaElement增强 作者： webabcd 介绍 Silverlight 3.0 控件一览： TreeView - 树控件 ListBox - 改进：支持多选 DataGrid - 改进：结合 PagedCollectionView 实现数据 [索引页]
[源码下载]


稳扎稳打Silverlight(36) - 3.0控件之TreeVIEw,ListBox增强,DataGrID增强,MediaElement增强

作者： webabcd


介绍
Silverlight 3.0 控件一览：
TreeVIEw - 树控件 ListBox - 改进：支持多选 DataGrID - 改进：结合 PagedCollectionVIEw 实现数据分组,增加了一些编辑数据的相关事件,结合 DataAnnotations 实现数据验证,等。。。 MediaElement - 增加了对视频 H.264 编码格式的支持，和对音频 AAC 编码格式的支持 

在线DEMO
http://www.cnblogs.com/webabcd/archive/2009/08/04/1538238.html


示例
1、演示 TreeVIEw 的使用
TreeVIEw.xml（数据源）

<? xml version="1.0" enCoding="utf-8"  ?>

< root >

     < node  name ="a level 1" >

         < node  name ="a level 2" >

             < node  name ="a level 3" >

                 < node  name ="a level 4"   />

             </ node >

         </ node >

     </ node >

     < node  name ="b level 1" >

         < node  name ="b level 2" >

             < node  name ="b level 3" >

                 < node  name ="b level 4" >

                     < node  name ="b level 5"   />

                 </ node >

             </ node >

         </ node >

     </ node >

     < node  name ="c level 1" >

         < node  name ="c level 2" >

             < node  name ="c level 3" >

                 < node  name ="c level 4"   />

             </ node >

         </ node >

     </ node >

     < node  name ="d level 1" >

         < node  name ="d level 2" >

             < node  name ="d level 3"   />

         </ node >

     </ node >

</ root >


TreeVIEw.xaml

< navigation:Page  x:Class ="Silverlight30.Control.TreeVIEw"  

           xmlns:controls ="clr-namespace:System.windows.Controls;assembly=System.windows.Controls"   

           xmlns:common ="clr-namespace:System.windows;assembly=System.windows.Controls"

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

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

           xmlns:d ="http://schemas.microsoft.com/Expression/blend/2008"

           xmlns:mc ="http://schemas.openxmlformats.org/markup-compatibility/2006"

           mc:Ignorable ="d"

           xmlns:navigation ="clr-namespace:System.windows.Controls;assembly=System.windows.Controls.Navigation"

           d:DesignWIDth ="640"  d:DesignHeight ="480"

           Title ="TreeVIEw Page" >

     < GrID  x:name ="LayoutRoot" >

         < StackPanel >


             < StackPanel.Resources >

            

                 <!--

                    HIErarchicalDataTemplate - 呈现层级数据的数据模板

                        ItemsSource - 指定下一级数据的数据源

                        ItemTemplate - 指定下一级数据的数据模板

                 -->

                 < common:HIErarchicalDataTemplate  x:Key ="childTemplate"  

                    ItemsSource =" {Binding Path=Children} " >

                     < StackPanel  OrIEntation ="Horizontal" >

                         < CheckBox  />

                         < TextBlock  Text =" {Binding Path=Title} "  FontStyle ="Italic"   />

                     </ StackPanel >

                 </ common:HIErarchicalDataTemplate >

                 < common:HIErarchicalDataTemplate  x:Key ="treeTemplate"  

                    ItemsSource =" {Binding Path=Children} "  

                    ItemTemplate =" {StaticResource childTemplate} " >

                     < TextBlock  Text =" {Binding Path=Title} "  FontWeight ="Bold"   />

                 </ common:HIErarchicalDataTemplate >

                

             </ StackPanel.Resources >

            

            

             <!--

                ItemsSource - 数据源

                ItemTemplate - 指定层级显示数据的模板

             -->

             < controls:TreeVIEw  x:name ="treeVIEw"  margin ="5"

                ItemsSource =" {Binding} "  

                ItemTemplate =" {StaticResource treeTemplate} "

                selecteditemchanged ="treeVIEw_selecteditemchanged" >

             </ controls:TreeVIEw >

            

            

             <!--

                TreeVIEwItem - TreeVIEw 的项

                    header - 项的标题

                    headerTemplate - 项的标题模板

             -->

             < controls:TreeVIEw  x:name ="treeVIEw2"  margin ="5" >

                 < controls:TreeVIEwItem  header ="level 1" >

                     < controls:TreeVIEwItem  header ="level 2" >

                         < controls:TreeVIEwItem >

                             < controls:TreeVIEwItem.headerTemplate >

                                 < DataTemplate >

                                     < TextBlock  Text ="level 3"  FontWeight ="Bold"   />

                                 </ DataTemplate >

                             </ controls:TreeVIEwItem.headerTemplate >

                         </ controls:TreeVIEwItem >

                     </ controls:TreeVIEwItem >

                 </ controls:TreeVIEwItem >

             </ controls:TreeVIEw >             

            

         </ StackPanel >

     </ GrID >

</ navigation:Page >


TreeVIEw.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.Navigation;


 using  System.Xml.linq;

 using  Silverlight30.Model;


 namespace  Silverlight30.Control

{

    public partial class TreeVIEw : Page

@H_735_1404@

    

{

        public TreeVIEw()

        

{

            InitializeComponent();


            this.Loaded += new RoutedEventHandler(TreeVIEw_Loaded);

        }


        voID TreeVIEw_Loaded(object sender, RoutedEventArgs e)

        

{

            XElement root = XElement.Load("Control/TreeVIEw.xml");


            // 构造带层级关系的数据源（递归方式）

            var result = LoadData(root);


            treeVIEw.DataContext = result;

        }


        private List<Treeviewmodel> LoadData(XElement root)

        

{

            if (root == null)

                return null;


            var items = from n in root.Elements("node")

                        select new Treeviewmodel

                        

{

                            Title = (string)n.Attribute("name"),

                            Children = LoadData(n)

                        };


            return items.ToList();

        }


        private voID treeVIEw_selecteditemchanged(object sender, RoutedPropertyChangedEventArgs<object> e)

        

{

            MessageBox.Show(((Treeviewmodel)e.NewValue).Title);

        }

    }

}



2、演示 ListBox 增加的一个功能：多选
ListBox.xaml

< navigation:Page  x:Class ="Silverlight30.Control.ListBox"  

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

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

           xmlns:d ="http://schemas.microsoft.com/Expression/blend/2008"

           xmlns:mc ="http://schemas.openxmlformats.org/markup-compatibility/2006"

           mc:Ignorable ="d"

           xmlns:navigation ="clr-namespace:System.windows.Controls;assembly=System.windows.Controls.Navigation"

           d:DesignWIDth ="640"  d:DesignHeight ="480"

           Title ="ListBox Page" >

     < GrID  x:name ="LayoutRoot" >

         < StackPanel >

        

             <!--

                ListBox - 新增特性：可以多选

                SelectionMode - 选择模式 [System.windows.Controls.SelectionMode 枚举]

                    Single - 只允许单选

                    Multiple - 可以多选（不需要任何辅助键）

                    Extended - 可以多选（需要 Ctrl 或 Shift 的配合）

             -->

             < ListBox  x:name ="ListBox"  margin ="5"  WIDth ="200"  Height ="100"  SelectionMode ="Extended" >

                 < ListBox.ItemTemplate >

                     < DataTemplate >

                         < StackPanel  OrIEntation ="Horizontal" >

                             < TextBlock  Text =" {Binding} "  margin ="5"   />

                         </ StackPanel >

                     </ DataTemplate >

                 </ ListBox.ItemTemplate >

             </ ListBox >

            

             < button  Content ="获取选中项"  Click ="button_Click"   />

             < TextBlock  x:name ="lblResult"   />

            

         </ StackPanel >

     </ GrID >

</ navigation:Page >


ListBox.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.Navigation;


 namespace  Silverlight30.Control

{

    public partial class ListBox : Page

    

{

        public ListBox()

        

{

            InitializeComponent();


            this.Loaded += new RoutedEventHandler(ListBox_Loaded);

        }


        voID ListBox_Loaded(object sender, RoutedEventArgs e)

        

{

            List<string> items = new List<string>();

            for (int i = 0; i < 30; i++)

@H_559_2502@

            

{

                items.Add(i.ToString().Padleft(10, '0'));

            }


            ListBox.ItemsSource = items;

        }


        private voID button_Click(object sender, RoutedEventArgs e)

        

{

            lblResult.Text = "";

            // ListBox.SelectedItems - 选中的对象集合

            foreach (string s in ListBox.SelectedItems)

            

{

                lblResult.Text += s + "/r/n";

            }

        }

    }

}



3、演示 DataGrID 的几个新增的功能
DataGrID.xaml

< navigation:Page  xmlns:data ="clr-namespace:System.windows.Controls;assembly=System.windows.Controls.Data"   x:Class ="Silverlight30.Control.DataGrID"  

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

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

           xmlns:d ="http://schemas.microsoft.com/Expression/blend/2008"

           xmlns:mc ="http://schemas.openxmlformats.org/markup-compatibility/2006"

           mc:Ignorable ="d"

           xmlns:navigation ="clr-namespace:System.windows.Controls;assembly=System.windows.Controls.Navigation"

           d:DesignWIDth ="640"  d:DesignHeight ="480"

           Title ="DataGrID Page" >

     < GrID  x:name ="LayoutRoot" >

    

         <!--

            新增功能：结合 PagedCollectionVIEw 实现数据分组；增加了一些编辑数据的相关事件；结合 DataAnnotations 实现数据验证

         -->

         < data:DataGrID  x:name ="dataGrID"  autoGenerateColumns ="False" >

             < data:DataGrID.Columns >

                 < data:DataGrIDTextColumn  Binding =" {Binding name} "  header ="名字"   />

                 < data:DataGrIDTextColumn  Binding =" {Binding DateOfBirth} "  header ="生日"   />

             </ data:DataGrID.Columns >

         </ data:DataGrID >


     </ GrID >

</ navigation:Page >


DataGrID.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.Navigation;


 using  System.Xml.linq;

 using  Silverlight30.Model;

 using  System.windows.Data;


 namespace  Silverlight30.Control

{

    public partial class DataGrID : Page

    

{

        public DataGrID()

        

{

            InitializeComponent();


            this.Loaded += new RoutedEventHandler(DataGrID_Loaded);

        }


        voID DataGrID_Loaded(object sender, RoutedEventArgs e)

        

{

            List<EmployeeModel> employees = new List<EmployeeModel>();

            employees.Add(new EmployeeModel 

{ name = "aabb", DateOfBirth = DateTime.Now, Salary = 1111 });

            employees.Add(new EmployeeModel 

{ name = "aabc", Salary = 1111 });

            employees.Add(new EmployeeModel 

{ name = "abcc", Salary = 1122 });

            employees.Add(new EmployeeModel @H_679_3419@

{ name = "abbc", Salary = 1122 });

            employees.Add(new EmployeeModel 

{ name = "aaab", Salary = 1122 });

            employees.Add(new EmployeeModel 

{ name = "bcca", Salary = 1122 });

            employees.Add(new EmployeeModel 

{ name = "bbac", Salary = 1133 });

            employees.Add(new EmployeeModel 

{ name = "cbaa", Salary = 1133 });

            employees.Add(new EmployeeModel 

{ name = "ccaa", Salary = 1133 });

            employees.Add(new EmployeeModel 

{ name = "cccb", Salary = 1144 });

            employees.Add(new EmployeeModel 

{ name = "cccc", Salary = 1155 });

            employees.Add(new EmployeeModel 

{ name = "cabc", Salary = 1155 });

            employees.Add(new EmployeeModel 

{ name = "cabb", Salary = 1166 });


            // 通过 PagedCollectionVIEw 的 GroupDescriptions 设置需要分组的字段，绑定到 DataGrID 后，DataGrID会自动对数据做分组显示

            PagedCollectionVIEw vIEw = new PagedCollectionVIEw(employees);

            vIEw.GroupDescriptions.Add(new PropertyGroupDescription("Salary"));


            dataGrID.ItemsSource = vIEw;

        }

    }

}



4、演示 MediaElement 的增强点：以 H.264 编码，MP4为容器做演示
MediaElement.xaml

< navigation:Page  x:Class ="Silverlight30.Control.MediaElement"  

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

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

           xmlns:d ="http://schemas.microsoft.com/Expression/blend/2008"

           xmlns:mc ="http://schemas.openxmlformats.org/markup-compatibility/2006"

           mc:Ignorable ="d"

           xmlns:navigation ="clr-namespace:System.windows.Controls;assembly=System.windows.Controls.Navigation"

           d:DesignWIDth ="640"  d:DesignHeight ="480"

           Title ="MediaElement Page" >

     < GrID  x:name ="LayoutRoot" >

    

         <!--

            增加了对视频 H.264 编码格式的支持，和对音频 AAC 编码格式的支持

            本例以 H.264 编码，MP4为容器做演示

         -->

         < MediaElement  x:name ="mediaElement"  Source ="/Resource/Demo.mp4"  WIDth ="320"  Height ="240"

            Autoplay ="True"  MediaEnded ="mediaElement_MediaEnded"   />

            

     </ GrID >

</ navigation:Page >


MediaElement.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.Navigation;


 namespace  Silverlight30.Control

{

    public partial class MediaElement : Page

    

{

        public MediaElement()

        

{

            InitializeComponent();

        }


        private voID mediaElement_MediaEnded(object sender, RoutedEventArgs e)

        

{

            // 重播

            mediaElement.Stop();

            mediaElement.Play();

        }

    }

}



OK
[源码下载] 总结

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