Silverlight中自定义图标控件
1. 建立一个用于读取资源的类SharedResources
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.linq;
using System.Reflection;
using System.windows;
using System.windows.Controls;
using System.windows.Markup;
using System.windows.Media.Imaging;
using System.Xml.linq;
namespace System.windows.Controls.Samples
{
/// <summary>
/// Utility to to load shared resources into another ResourceDictionary.
/// </summary>
public static class SharedResources
{
/// <summary>
/// Prefix of images loaded as resources.
///需要将资源嵌入，路径用命名空间的形式定义.
/// </summary>
private const string ResourceImagePrefix = "System.windows.Controls.Samples.Images.";
/// <summary>
/// Prefix of icons loaded as resources.
///需要将资源嵌入，路径用命名空间的形式定义.
/// </summary>
private const string ResourceIconPrefix = "System.windows.Controls.Samples.Icons.";
/// <summary>
/// Get an embedded resource image from the assembly.
/// </summary>
/// <param name="name">name of the image resource.</param>
/// <returns>
/// Desired embedded resource image from the assembly.
/// </returns>
public static Image Getimage(string name)
{
return CreateImage(ResourceImagePrefix,name);
}
/// <summary>
/// Get an embedded resource icon from the assembly.
/// </summary>
/// <param name="name">name of the icon resource.</param>
/// <returns>
/// Desired embedded resource icon from the assembly.
/// </returns>
public static Image GetIcon(string name)
{
return CreateImage(ResourceIconPrefix,name);
}
/// <summary>
/// A cached dictionary of the bitmap images.
/// </summary>
private static IDictionary<string,BitmAPImage> cachedBitmAPImages = new Dictionary<string,BitmAPImage>();
/// <summary>
/// Get an embedded resource image from the assembly.
/// </summary>
/// <param name="prefix">The prefix of the full name of the resource.</param>
/// <param name="name">name of the image resource.</param>
/// <returns>
/// Desired embedded resource image from the assembly.
/// </returns>
public static Image CreateImage(string prefix,string name)
{
Image image = new Image { Tag = name };
BitmAPImage source = null;
string resourcename = prefix + name;
if (!cachedBitmAPImages.TryGetValue(resourcename,out source))
{
Assembly assembly = typeof(SharedResources).Assembly;
using (Stream resource = assembly.GetManifestResourceStream(resourcename))
{
if (resource != null)
{
source = new BitmAPImage();
source.SetSource(resource);
}
}
cachedBitmAPImages[resourcename] = source;
}
image.source = source;
return image;
}
/// <summary>
/// Get all of the names of embedded resources images in the assembly.
/// </summary>
/// <returns>
/// All of the names of embedded resources images in the assembly.
/// </returns>
[SuppressMessage("Microsoft.Design","CA1024:UsePropertIEsWhereAppropriate",Justification = "Does more work than a property should.")]
public static IEnumerable<string> Getimagenames()
{
return GetResourcenames(ResourceImagePrefix);
}
/// <summary>
/// Get all of the names of embedded resources icons in the assembly.
/// </summary>
/// <returns>
/// All of the names of embedded resources icons in the assembly.
/// </returns>
[SuppressMessage("Microsoft.Design",Justification = "Does more work than a property should.")]
public static IEnumerable<string> GetIconnames()
{
return GetResourcenames(ResourceIconPrefix);
}
/// <summary>
/// Get all of the images in the assembly.
/// </summary>
/// <returns>All of the images in the assembly.</returns>
[SuppressMessage("Microsoft.Design",Justification = "Does more work than a property should")]
public static IEnumerable<Image> Getimages()
{
foreach (string name in Getimagenames())
{
yIEld return Getimage(name);
}
}
/// <summary>
/// Get all of the icons in the assembly.
/// </summary>
/// <returns>All of the icons in the assembly.</returns>
[SuppressMessage("Microsoft.Design",Justification = "Does more work than a property should")]
public static IEnumerable<Image> GetIcons()
{
foreach (string name in GetIconnames())
{
yIEld return Getimage(name);
}
}
/// <summary>
/// Get all the names of embedded resources in the assembly with the
/// provIDed prefix value.
/// </summary>
/// <param name="prefix">The prefix for the full resource name.</param>
/// <returns>Returns an enumerable of all the resource names that match.</returns>
private static IEnumerable<string> GetResourcenames(string prefix)
{
Assembly assembly = typeof(SharedResources).Assembly;
foreach (string name in assembly.GetManifestResourcenames())
{
// Ignore resources that don't share the images prefix
if (!name.StartsWith(prefix,StringComparison.OrdinalignoreCase))
{
continue;
}
// Trim the prefix off of the name
yIEld return name.Substring(prefix.Length,name.Length - prefix.Length);
}
}
}
}
@H_404_1612@2. 定义节点SampleTreeItem
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.windows.Markup;
using System.windows.Controls;
namespace System.windows.Controls.Samples
{
/// <summary>
/// The SampleTreeItem represents a node in the TreeVIEw.
/// </summary>
[contentproperty("Items")]
public class SampleTreeItem
{
/// <summary>
/// Gets or sets the name of the TreeVIEw node.
/// </summary>
public string TreeItemname { get; set; }
/// <summary>
/// Gets a collection of SampleTreeItems.
/// </summary>
public Collection<SampleTreeItem> Items { get; private set; }
/// <summary>
/// Initialize a SampleTreeItem.
/// </summary>
public SampleTreeItem()
{
Items = new Collection<SampleTreeItem>();
}
/// <summary>
/// Gets or sets the resource name of the Icon representing this
/// node.
/// </summary>
public string IconResourcename { get; set; }
/// <summary>
/// Gets the icon representing this type.
/// </summary>
public Image Icon
{
get
{
return SharedResources.GetIcon(IconResourcename);
}
}
}
}
@H_404_1612@3. 定义数据源,这里将数据写死在App.xaml中
<toolkit:ObjectCollection x:Key="SampleTreeVIEw" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
<samplesCommon:SampleTreeItem TreeItemname="Controls">
<samplesCommon:SampleTreeItem TreeItemname="Calendar" IconResourcename="Calendar.png"/>
<samplesCommon:SampleTreeItem TreeItemname="ChilDWindow" IconResourcename="ChilDWindow.png" />
<samplesCommon:SampleTreeItem TreeItemname="DatePicker" IconResourcename="DatePicker.png" />
<samplesCommon:SampleTreeItem TreeItemname="GrIDSplitter" IconResourcename="GrIDSplitter.png" />
<samplesCommon:SampleTreeItem TreeItemname="TabControl" IconResourcename="TabControl.png" />
<samplesCommon:SampleTreeItem TreeItemname="TreeVIEw" IconResourcename="TreeVIEw.png" />
</samplesCommon:SampleTreeItem>
<samplesCommon:SampleTreeItem TreeItemname="Data">
<samplesCommon:SampleTreeItem TreeItemname="DataGrID" IconResourcename="DataGrID.png" />
<samplesCommon:SampleTreeItem TreeItemname="DataPager" IconResourcename="DataPager.png" />
</samplesCommon:SampleTreeItem>
<samplesCommon:SampleTreeItem TreeItemname="DataForm">
<samplesCommon:SampleTreeItem TreeItemname="DataForm" IconResourcename="DataForm.png" />
</samplesCommon:SampleTreeItem>
<samplesCommon:SampleTreeItem TreeItemname="Data input">
<samplesCommon:SampleTreeItem TreeItemname="ValIDation" IconResourcename="ValIDationSummary.png" />
</samplesCommon:SampleTreeItem>
<samplesCommon:SampleTreeItem TreeItemname="DataVisualization">
<samplesCommon:SampleTreeItem TreeItemname="Area SerIEs" IconResourcename="AreaSerIEs.png"/>
<samplesCommon:SampleTreeItem TreeItemname="bar SerIEs" IconResourcename="barSerIEs.png"/>
<samplesCommon:SampleTreeItem TreeItemname="Bubble SerIEs" IconResourcename="BubbleSerIEs.png"/>
<samplesCommon:SampleTreeItem TreeItemname="Column SerIEs" IconResourcename="ColumnSerIEs.png"/>
<samplesCommon:SampleTreeItem TreeItemname="line SerIEs" IconResourcename="lineserIEs.png"/>
<samplesCommon:SampleTreeItem TreeItemname="PIE SerIEs" IconResourcename="PIESerIEs.png"/>
<samplesCommon:SampleTreeItem TreeItemname="Scatter SerIEs" IconResourcename="ScatterSerIEs.png"/>
<samplesCommon:SampleTreeItem TreeItemname="TreeMap" IconResourcename="TreeMap.png" />
</samplesCommon:SampleTreeItem>
<samplesCommon:SampleTreeItem TreeItemname="input">
<samplesCommon:SampleTreeItem TreeItemname="autocompletebox" IconResourcename="autocompletebox.png"/>
<samplesCommon:SampleTreeItem TreeItemname="buttonSpinner" IconResourcename="buttonSpinner.png"/>
<samplesCommon:SampleTreeItem TreeItemname="Domainupdown" IconResourcename="Domainupdown.png"/>
<samplesCommon:SampleTreeItem TreeItemname="Numericupdown" IconResourcename="Numericupdown.png"/>
<samplesCommon:SampleTreeItem TreeItemname="rating" IconResourcename="rating.png"/>
<samplesCommon:SampleTreeItem TreeItemname="TimePicker" IconResourcename="TimePicker.png"/>
<samplesCommon:SampleTreeItem TreeItemname="updownBase" IconResourcename="updownBase.png"/>
</samplesCommon:SampleTreeItem>
<samplesCommon:SampleTreeItem TreeItemname="Layout">
<samplesCommon:SampleTreeItem TreeItemname="Accordion" IconResourcename="Accordion.png" />
<samplesCommon:SampleTreeItem TreeItemname="TransitioningContentControl" IconResourcename="TransitioningContentControl.png" />
</samplesCommon:SampleTreeItem>
<samplesCommon:SampleTreeItem TreeItemname="Navigation">
<samplesCommon:SampleTreeItem TreeItemname="Navigation" IconResourcename="Page.png" />
</samplesCommon:SampleTreeItem>
<samplesCommon:SampleTreeItem TreeItemname="Theming">
<samplesCommon:SampleTreeItem TreeItemname="ImplicitStyleManager" IconResourcename="ImplicitStyleManager.png"/>
<samplesCommon:SampleTreeItem TreeItemname="theme browser" IconResourcename="themebrowser.png"/>
</samplesCommon:SampleTreeItem>
<samplesCommon:SampleTreeItem TreeItemname="Toolkit">
<samplesCommon:SampleTreeItem TreeItemname="DockPanel" IconResourcename="DockPanel.png" />
<samplesCommon:SampleTreeItem TreeItemname="Expander" IconResourcename="Expander.png" />
<samplesCommon:SampleTreeItem TreeItemname="GlobalCalendar" IconResourcename="Calendar.png"/>
<samplesCommon:SampleTreeItem TreeItemname="VIEwBox" IconResourcename="VIEwBox.png" />
<samplesCommon:SampleTreeItem TreeItemname="WrapPanel" IconResourcename="WrapPanel.png" />
</samplesCommon:SampleTreeItem>
</toolkit:ObjectCollection>
@H_404_1612@4. 调用生成带图标节点的树
using System;
using System.windows;
using System.Collections.Generic;
using System.linq;
namespace System.windows.Controls.Samples
{
/// <summary>
/// System.windows.Controls samples application.
/// </summary>
public partial class App : Application
{
/// <summary>
/// Initializes a new instance of the App class.
/// </summary>
public App()
{
Startup += delegate
{
RootVisual = new Samplebrowser(this.GetType().Assembly,SampleTreeItems);
};
InitializeComponent();
}
/// <summary>
/// Gets a collection of SampleTreeItems to populate the Samplebrowser TreeVIEw.
/// </summary>
public static IEnumerable<SampleTreeItem> SampleTreeItems
{
get
{
IEnumerable<object> data = Application.Current.Resources["SampleTreeVIEw"] as IEnumerable<object>;
return (data != null) ?
data.OfType<SampleTreeItem>() :
Enumerable.Empty<SampleTreeItem>();
}
}
}
}
5．注意事项
SharedResources和SampleTreeItem需要与图标放在同一个项目里，图标需要嵌入到资源,而调用的程序可以在别的项目。
同一个程序可以有多个项目，每个项目可以有自已的“程序集名称”,
但项目间应该使用同一套“命名空间”，也就是说，不同项目间的“命名空间”不可以有重复.
如“程序集名称”可以分别定义成：
System.windows.Controls.Samples
System.windows.Controls.Samples.Common
但它们的默认“命名空间”都是System.windows.Controls.Samples
总之，程序集名称是用来管理文件的（不一定是层次结构）。而命名空间才是用来管理代码的层次结构的。
为什么会这么设计呢。
有时候一个命名空间(一般对应一个文件夹)中的内容可能会很多，这时我们就需要把它拆分成不同的程序集。以便于管理。而有时候呢，代码量很少，不同的命名空间就直接放在一个文件中了。
真正使用时，
一个文件夹对应一个命名空间。如果不同的程序集使用的是同一个命名空间，那么他们应该可以放在同一个文件夹中。也就时说相同命名空间的项目之间,它们的第一级文件及文件夹的名称不可以有重复的。
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