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稳扎稳打Silverlight(42) - 4.0控件之Viewbox, RichTextBox

Posted on 2010-08-09 09:10  webabcd  阅读(10349)  评论(8编辑  收藏

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稳扎稳打Silverlight(42) - 4.0控件之Viewbox, RichTextBox



作者:webabcd


介绍
Silverlight 4.0 控件一览:

  • Viewbox - 一个容器控件,其内只能有一个子元素。Viewbox 可以决定其内的子元素如何拉伸、缩放、对齐
  • RichTextBox - 编辑器。用于显示或编辑文本、超链、图片、UI元素等 



在线DEMO
http://www.cnblogs.com/webabcd/archive/2010/08/09/1795417.html


示例
 1、Viewbox 的 Demo
ViewboxDemo.xaml

代码
<navigation:Page x:Class="Silverlight40.Control.ViewboxDemo" 
           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"
           xmlns:navigation
="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
           Title
="ViewboxDemo Page">
    
<Grid x:Name="LayoutRoot" Background="White">
        
<StackPanel Background="AntiqueWhite" HorizontalAlignment="Left">

            
<!-- 用于演示 Viewbox.Stretch 属性 -->
            
<StackPanel Margin="5" Width="200">
                
<TextBlock Text="Stretch" />
                
<Button Name="btn1" Click="stretchNone" Content="None" />
                
<Button Name="btn2" Click="stretchFill" Content="Fill" />
                
<Button Name="btn3" Click="stretchUniform" Content="Uniform" />
                
<Button Name="btn4" Click="stretchUniformToFill" Content="UniformToFill" />
            
</StackPanel>

            
<!-- 用于演示 Viewbox.StretchDirection 属性 -->
            
<StackPanel Margin="5" Width="200">
                
<TextBlock Text="StretchDirection" />
                
<Button Name="btn5" Click="stretchDirectionUpOnly" Content="UpOnly" />
                
<Button Name="btn6" Click="stretchDirectionDownOnly" Content="DownOnly" />
                
<Button Name="btn7" Click="stretchDirectionBoth" Content="Both" />
            
</StackPanel>

            
<!-- 用于演示 Viewbox.HorizontalAlignment 属性 -->
            
<StackPanel Margin="5" Width="200">
                
<TextBlock Text="HorizontalAlignment" />
                
<Button Name="btn8" Click="horizontalAlignmentCenter" Content="Center" />
                
<Button Name="btn9" Click="horizontalAlignmentLeft" Content="Left" />
                
<Button Name="btn10" Click="horizontalAlignmentRight" Content="Right" />
                
<Button Name="btn11" Click="horizontalAlignmentStretch" Content="Stretch" />
            
</StackPanel>

            
<!-- 用于演示 Viewbox.VerticalAlignment 属性 -->
            
<StackPanel Margin="5" Width="200">
                
<TextBlock Text="VerticalAlignment" />
                
<Button Name="btn12" Click="verticalAlignmentCenter" Content="Center" />
                
<Button Name="btn13" Click="verticalAlignmentTop" Content="Top" />
                
<Button Name="btn14" Click="verticalAlignmentBottom" Content="Bottom" />
                
<Button Name="btn15" Click="verticalAlignmentStretch" Content="Stretch" />
            
</StackPanel>

            
<!-- 用于显示当前 Viewbox 的 Stretch 值,StretchDirection 值,HorizontalAlignment 值,VerticalAlignment 值 -->
            
<StackPanel Margin="5">
                
<TextBlock Name="lblMsg" />
            
</StackPanel>

            
<!-- 用于演示 Viewbox 的各种效果 -->
            
<StackPanel Width="500" Height="300" Background="Black">
                
<Viewbox Name="viewbox" Width="500" Height="300">
                    
<!-- 注:Viewbox 内只能有一个子元素 -->
                    
<Image Source="/Resource/Logo.jpg" />
                
</Viewbox>
            
</StackPanel>
            
        
</StackPanel>
    
</Grid>
</navigation:Page>


ViewboxDemo.xaml.cs

代码
/*
 * Viewbox - 一个容器控件,其内只能有一个子元素。Viewbox 可以决定其内的子元素如何拉伸、缩放、对齐
 
*/

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 Silverlight40.Control
{
    
public partial class ViewboxDemo : Page
    {
        
public ViewboxDemo()
        {
            InitializeComponent();
        }

        
protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            ShowResult();
        }

        
// 用于显示当前 Viewbox 的 Stretch 值,StretchDirection 值,HorizontalAlignment 值,VerticalAlignment 值
        private void ShowResult()
        {
            lblMsg.Text 
= string.Format("Stretch: {0}, StretchDirection: {1}, HorizontalAlignment: {2}, VerticalAlignment: {3}",
                viewbox.Stretch.ToString(),
                viewbox.StretchDirection.ToString(),
                viewbox.HorizontalAlignment.ToString(),
                viewbox.VerticalAlignment.ToString());
        }


        
/*
         * Viewbox.Stretch - 子元素在 Viewbox 内的拉伸模式 [System.Windows.Media.Stretch 枚举]
         *     Stretch.None - 不做处理。不做任何拉伸处理,填充内容保持原始大小
         *     Stretch.Fill - 充满。调整填充内容,以充满整个容器,填充内容比例变为容器比例
         *     Stretch.Uniform - 等比适应。调整填充内容,以适合容器尺寸,填充内容会做等比例调整(默认值)
         *         如果填充内容与容器比例不一样,那么填充内容调整的结果为:
     *       使得填充内容的宽与容器的宽相等,或者 填充内容的高与容器的高相等。填充内容会被完整显示
         *     Stretch.UniformToFill - 等比充满。调整填充内容,以适合容器尺寸,填充内容会做等比例调整
         *         如果填充内容与容器比例不一样,那么填充内容调整的结果为:
     *      使得填充内容的宽与容器的宽相等,并且 填充内容的高与容器的高相等。填充内容会被做相应的剪裁
         
*/
        
private void stretchNone(object sender, RoutedEventArgs e)
        {
            viewbox.Stretch 
= Stretch.None;
            ShowResult();
        }
        
private void stretchFill(object sender, RoutedEventArgs e)
        {
            viewbox.Stretch 
= Stretch.Fill;
            ShowResult();
        }
        
private void stretchUniform(object sender, RoutedEventArgs e)
        {
            viewbox.Stretch 
= Stretch.Uniform;
            ShowResult();
        }
        
private void stretchUniformToFill(object sender, RoutedEventArgs e)
        {
            viewbox.Stretch 
= Stretch.UniformToFill;
            ShowResult();
        }


        
/*
         * Viewbox.StretchDirection - 子元素在 Viewbox 内的缩放模式 [System.Windows.Controls.StretchDirection 枚举]
         *     StretchDirection.UpOnly - 当子元素小于 Viewbox 时,子元素会放大
         *     StretchDirection.DownOnly - 当子元素大于 Viewbox 时,子元素会缩小
         *     StretchDirection.Both - 不做任何处理(默认值)
         
*/
        
private void stretchDirectionUpOnly(object sender, RoutedEventArgs e)
        {
            viewbox.StretchDirection 
= StretchDirection.UpOnly;
            ShowResult();
        }
        
private void stretchDirectionDownOnly(object sender, RoutedEventArgs e)
        {
            viewbox.StretchDirection 
= StretchDirection.DownOnly;
            ShowResult();
        }
        
private void stretchDirectionBoth(object sender, RoutedEventArgs e)
        {
            viewbox.StretchDirection 
= StretchDirection.Both;
            ShowResult();
        }


        
/*
         * Viewbox.HorizontalAlignment - 子元素在 Viewbox 内的水平方向的对齐模式 [System.Windows.HorizontalAlignment 枚举]
         *      Center, Left, Right, Stretch(默认值)
         
*/
        
private void horizontalAlignmentCenter(object sender, RoutedEventArgs e)
        {
            viewbox.HorizontalAlignment 
= HorizontalAlignment.Center;
            ShowResult();
        }
        
private void horizontalAlignmentLeft(object sender, RoutedEventArgs e)
        {
            viewbox.HorizontalAlignment 
= HorizontalAlignment.Left;
            ShowResult();
        }
        
private void horizontalAlignmentRight(object sender, RoutedEventArgs e)
        {
            viewbox.HorizontalAlignment 
= HorizontalAlignment.Right;
            ShowResult();
        }
        
private void horizontalAlignmentStretch(object sender, RoutedEventArgs e)
        {
            viewbox.HorizontalAlignment 
= HorizontalAlignment.Stretch;
            ShowResult();
        }


        
/*
         * Viewbox.VerticalAlignment - 子元素在 Viewbox 内的垂直方向的对齐模式 [System.Windows.VerticalAlignment 枚举]
         *      Center, Top, Bottom, Stretch(默认值)
         
*/
        
private void verticalAlignmentCenter(object sender, RoutedEventArgs e)
        {
            viewbox.VerticalAlignment 
= VerticalAlignment.Center;
            ShowResult();
        }
        
private void verticalAlignmentTop(object sender, RoutedEventArgs e)
        {
            viewbox.VerticalAlignment 
= VerticalAlignment.Top;
            ShowResult();
        }
        
private void verticalAlignmentBottom(object sender, RoutedEventArgs e)
        {
            viewbox.VerticalAlignment 
= VerticalAlignment.Bottom;
            ShowResult();
        }
        
private void verticalAlignmentStretch(object sender, RoutedEventArgs e)
        {
            viewbox.VerticalAlignment 
= VerticalAlignment.Stretch;
            ShowResult();
        }
    }
}



2、RichTextBox 的 Demo
RichTextBoxDemo.xaml

代码
<navigation:Page x:Class="Silverlight40.Control.RichTextBoxDemo" 
           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"
           xmlns:navigation
="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
           Title
="RichTextBoxDemo Page">
    
<StackPanel HorizontalAlignment="Left">
        
        
<StackPanel Background="AntiqueWhite" Orientation="Horizontal">
            
<ComboBox x:Name="cmbFontSize" FontSize="{Binding SelectedItem.FontSize, RelativeSource={RelativeSource Self}}" SelectionChanged="cmbFontSize_SelectionChanged">
                
<ComboBoxItem Content="16" Tag="16" FontSize="16" IsSelected="True" />
                
<ComboBoxItem Content="48" Tag="48" FontSize="48" />
            
</ComboBox>
            
<ComboBox x:Name="cmbFontFamily" FontFamily="{Binding SelectedItem.FontFamily, RelativeSource={RelativeSource Self}}" SelectionChanged="cmbFontFamily_SelectionChanged">
                
<ComboBoxItem Content="Arial" Tag="Arial" FontFamily="Arial" IsSelected="True" />
                
<ComboBoxItem Content="Verdana" Tag="Verdana" FontFamily="Verdana" />
            
</ComboBox>
            
<Button Name="btnBold" Content="加粗" Click="btnBold_Click" />
            
<Button Name="btnItalic" Content="斜体" Click="btnItalic_Click" />
            
<Button Name="btnUnderline" Content="下划线" Click="btnUnderline_Click" />
            
<Button Name="btnHyperlink" Content="插入超级链接的 Demo" Click="btnHyperlink_Click" />
            
<Button Name="btnUIElement" Content="插入 UIElement 的 Demo" Click="btnUIElement_Click" />
            
<ToggleButton Name="btnXaml" Content="xaml" Checked="btnXaml_Checked" Unchecked="btnXaml_Checked" />
            
<ToggleButton Name="btnPreview" Content="预览" Checked="btnPreview_Checked" Unchecked="btnPreview_Checked" />
            
<Button Name="btnTextPointerDemo" Content="TextPointer 的 Demo (将光标当前所在位置到文本结尾的文字全变为绿色)" Click="btnTextPointerDemo_Click" />
        
</StackPanel>
        
        
<Grid Width="600" Height="400">
            
<RichTextBox Name="richTextBox" VerticalScrollBarVisibility="Auto">
                
<Paragraph>
                    webabcd
                
</Paragraph>
                
<Paragraph>
                    
<Span>webabcd</Span>
                    
<LineBreak />
                    
<Bold>webabcd</Bold>
                    
<LineBreak />
                    
<Italic>webabcd</Italic>
                    
<LineBreak />
                    
<Underline>webabcd</Underline>
                    
<LineBreak />
                    
<Run FontFamily="Arial" FontSize="20" FontStretch="Normal" FontStyle="Italic" FontWeight="Bold" Foreground="Red" TextDecorations="underline" Text="webabcd" />
                    
<LineBreak />
                    
<Hyperlink TargetName="_black" NavigateUri="http://webabcd.cnblogs.com/">webabcd</Hyperlink>
                    
<LineBreak />
                    
<InlineUIContainer>
                        
<Image Source="/Resource/Logo.jpg" Height="100" Width="100" ToolTipService.ToolTip="我是提示" />
                    
</InlineUIContainer>
                
</Paragraph>
            
</RichTextBox>
            
<TextBox Name="txtXaml" TextWrapping="Wrap" VerticalScrollBarVisibility="Auto" Visibility="Collapsed" />
        
</Grid>
        
        
<TextBlock Name="lblMsg" />
        
    
</StackPanel>
</navigation:Page>


RichTextBoxDemo.xaml.cs

代码
/*
 * RichTextBox - 编辑器。用于显示或编辑文本、超链、图片、UI元素等
 
*/

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.Windows.Media.Imaging;

namespace Silverlight40.Control
{
    
public partial class RichTextBoxDemo : Page
    {
        
public RichTextBoxDemo()
        {
            InitializeComponent();
        }

        
protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            
/*
             * RichTextBox 的内容结构说明如下:
             * 
             * Block - 抽象类。块级内容的基类
             *     Paragraph - 段落,包含一组内联元素。继承自 Block
             * Inline - 抽象类。内联元素的基类
             *     Run - 文本。继承自 Inline
             *     LineBreak - 换行。继承自 Inline
             *     Span - 文本。继承自 Inline
             *         Hyperlink - 超链接。继承自 Span
             *         Bold - 加粗。继承自 Span
             *         Italic - 斜体。继承自 Span
             *         Underline - 下划线。继承自 Span
             *     InlineUIContainer - 用于承载 UIElement 类型的对象。继承自 Span
             * TextElement - TextElement是 Inline 的基类,可以对其设置如下属性
             *     FontSize - 字体大小
             *     FontFamily - 字体名称
             *     Foreground - 字体颜色(因为 xaml 属性仅支持可以表示为一个字符串的属性值。所以这里只能使用 SolidColorBrush,而不能使用 LinearGradientBrush 之类的)
             *     FontWeight - 笔画粗细
             *     FontStyle - 是否斜体
             *     FontStretch - 字体的拉伸程度(需要字体支持)
             
*/


            
/* 
             * Paragraph.Inlines - 段落所包含的内联元素的集合
             * RichTextBox.Blocks - RichTextBox 中的块级元素的集合
             * RichTextBox.Xaml - RichTextBox 中的内容的 xaml 代码
             
*/

            Bold bold 
= new Bold();
            bold.Inlines.Add(
"web");

            LineBreak lineBreak 
= new LineBreak();

            Run run 
= new Run();
            run.Text 
= "abcd";
            
            Paragraph paragraph 
= new Paragraph();
            paragraph.Inlines.Add(bold);
            paragraph.Inlines.Add(lineBreak);
            paragraph.Inlines.Add(run);

            richTextBox.Blocks.Add(paragraph);
        }


        
/*
         * RichTextBox.Selection - 获取 RichTextBox 中的选中内容,返回一个 TextSelection 类型的对象
         * TextSelection.ApplyPropertyValue(DependencyProperty formattingProperty,    Object value) - 为选中的内容指定其格式的属性和值
         *     DependencyProperty formattingProperty - 格式的属性
         *     Object value - 格式的属性的值
         * TextSelection.Text - 选中的内容中的纯文本内容
         * TextSelection.Xaml - 选中的内容的 xaml 代码
         * TextSelection.Insert() - 把当前选中的内容替换成指定的 TextElement
         * 以下分别举例如何设置选中文本的字体大小、字体名称、加粗、斜体、下划线
         
*/
        
private void cmbFontSize_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            
if (richTextBox != null && richTextBox.Selection.Text.Length > 0)
            {
                richTextBox.Selection.ApplyPropertyValue(Run.FontSizeProperty, 
double.Parse((cmbFontSize.SelectedItem as ComboBoxItem).Tag.ToString()));
            }
        }
        
private void cmbFontFamily_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            
if (richTextBox != null && richTextBox.Selection.Text.Length > 0)
            {
                richTextBox.Selection.ApplyPropertyValue(Run.FontFamilyProperty, 
new FontFamily((cmbFontFamily.SelectedItem as ComboBoxItem).Tag.ToString()));
            }
        }
        
private void btnBold_Click(object sender, RoutedEventArgs e)
        {
            
if (richTextBox.Selection.Text.Length > 0)
            {
                
if (richTextBox.Selection.GetPropertyValue(Run.FontWeightProperty) is FontWeight && ((FontWeight)richTextBox.Selection.GetPropertyValue(Run.FontWeightProperty)) == FontWeights.Normal)
                    richTextBox.Selection.ApplyPropertyValue(Run.FontWeightProperty, FontWeights.Bold);
                
else
                    richTextBox.Selection.ApplyPropertyValue(Run.FontWeightProperty, FontWeights.Normal);
            }
        }
        
private void btnItalic_Click(object sender, RoutedEventArgs e)
        {
            
if (richTextBox.Selection.Text.Length > 0)
            {
                
if (richTextBox.Selection.GetPropertyValue(Run.FontStyleProperty) is FontStyle && ((FontStyle)richTextBox.Selection.GetPropertyValue(Run.FontStyleProperty)) == FontStyles.Normal)
                    richTextBox.Selection.ApplyPropertyValue(Run.FontStyleProperty, FontStyles.Italic);
                
else
                    richTextBox.Selection.ApplyPropertyValue(Run.FontStyleProperty, FontStyles.Normal);
            }
        }
        
private void btnUnderline_Click(object sender, RoutedEventArgs e)
        {
            
if (richTextBox.Selection.Text.Length > 0)
            {
                
if (richTextBox.Selection.GetPropertyValue(Run.TextDecorationsProperty) == null)
                    richTextBox.Selection.ApplyPropertyValue(Run.TextDecorationsProperty, TextDecorations.Underline);
                
else
                    richTextBox.Selection.ApplyPropertyValue(Run.TextDecorationsProperty, 
null);
            }
        }


        
/*
         * TextSelection.Insert() - 把当前选中的内容替换成指定的 TextElement
         * Hyperlink - 一个用于显示超链接的内联元素。Hyperlink继承自Span,Span继承自Inline,Inline继承自TextElement
         * 以下举例如何插入超链接(要在 RichTextBox 使超链接有效,需要将 RichTextBox 设置为显示状态)
         
*/
        
private void btnHyperlink_Click(object sender, RoutedEventArgs e)
        {
            Hyperlink hyperlink 
= new Hyperlink();
            hyperlink.TargetName 
= "_blank";
            hyperlink.NavigateUri 
= new Uri("http://webabcd.cnblogs.com/");
            hyperlink.Inlines.Add(
"webabcd blog");
            richTextBox.Selection.Insert(hyperlink);
        }


        
/*
         * InlineUIContainer - 一个容器,可以承载任何 UIElement 类型的对象。InlineUIContainer继承自Inline
         * 以下举例如何插入图片
         
*/
        
private void btnUIElement_Click(object sender, RoutedEventArgs e)
        {
            Image img 
= new Image();
            img.Source 
= new BitmapImage(new Uri("/Resource/Logo.jpg", UriKind.Relative));
            img.Width 
= 100;
            img.Height 
= 100;

            InlineUIContainer container 
= new InlineUIContainer();
            container.Child 
= img;

            richTextBox.Selection.Insert(container);
        }


        
/*
         * RichTextBox.Xaml - RichTextBox 中的内容的 xaml 代码
         * 以下举例如何在“显示模式”和“代码模式”之间切换
         
*/
        
private void btnXaml_Checked(object sender, RoutedEventArgs e)
        {
            
if (btnXaml.IsChecked.Value)
            {
                txtXaml.Text 
= richTextBox.Xaml;
                txtXaml.Visibility 
= Visibility.Visible;
            }
            
else
            {
                richTextBox.Xaml 
= txtXaml.Text;
                txtXaml.Visibility 
= Visibility.Collapsed;
            }
        }


        
/*
         * RichTextBox.IsReadOnly - 指定是否可以在 RichTextBox 中编辑内容
         *     true - 显示模式
         *     false - 编辑模式(此模式下可以通过快捷键的方式来支持撤销 Ctrl+Z 和重做 Ctrl+Y 操作)
         * 以下举例如何预览 RichTextBox 中的内容(注:只有在显示模式中超链接才生效)
         
*/
        
private void btnPreview_Checked(object sender, RoutedEventArgs e)
        {
            richTextBox.IsReadOnly 
= btnPreview.IsChecked.Value;
        }


        
private void btnTextPointerDemo_Click(object sender, RoutedEventArgs e)
        {
            
/*
             * TextPointer - 表示 RichTextBox 中的一个位置
             * 插入位置(Insertion Position)的概念:
             *     TextPointer 出现在内容中的字符之间则为插入位置
             *     TextPointer 出现在定义内容结构的元素标记之间,则此位置不是插入位置。例如,两个相邻段落标记(即前一个段落的结束标记与下一个段落的开始标记)之间的位置就是一个有效的 TextPointer 位置,但不是插入位置
             * TextPointer.CompareTo(TextPointer tp) - 当前 TextPointer 位于指定的 TextPointer 之前则为 -1,之后则为 1,相同则为 0
             * TextPointer.IsAtInsertionPosition - 当前 TextPointer 是否是一个插入位置
             * TextPointer.GetNextInsertionPosition(LogicalDirection direction) - 获取当前 TextPointer 的按指定的逻辑方向的下一个插入位置
             *     LogicalDirection - 逻辑方向 [System.Windows.Documents.LogicalDirection 枚举]
             *         LogicalDirection.Forward - 向前
             *         LogicalDirection.Backward - 向后
             * TextPointer.GetPositionAtOffset(int offset, LogicalDirection direction) - 获取当前 TextPointer 的按指定的逻辑方向偏移了指定值的 TextPointer
             * TextPointer.Parent - 包含当前 TextPointer 的容器。比如,文字的 Parent 是 run ;RichTextBox.ContentEnd 的 Parent 是 RichTextBox
             * 
             * RichTextBox.ContentStart - RichTextBox 内容的开头的 TextPointer(肯定不是插入位置)
             * RichTextBox.ContentEnd - RichTextBox 内容的结尾的 TextPointer(肯定不是插入位置)
             * RichTextBox.GetPositionFromPoint(Point point) - 获取离指定 Point 最近的插入位置
             * RichTextBox.Selection - 获取 RichTextBox 中的选中内容,返回一个 TextSelection 类型的对象
             * TextSelection.Start - 选中内容的开头 TextPointer
             * TextSelection.End - 选中内容的开头 TextPointer
             * TextSelection.Select(TextPointer tp1, TextPointer tp2) - 指定两个 TextPointer 来更新选中内容
             * 
             * 在 RichTextBox 中被视为一个符号的有:TextElement 的开始或结束标记;InlineUIContainer 中的 UIElement 元素;Run 中的字符
             
*/

            
// 将光标当前所在位置到文本结尾的文字全变为绿色
            TextPointer currentPointer = richTextBox.Selection.Start;
            TextPointer endPointer 
= richTextBox.ContentEnd.GetNextInsertionPosition(LogicalDirection.Backward);
            richTextBox.Selection.Select(currentPointer, endPointer);
            richTextBox.Selection.ApplyPropertyValue(Run.ForegroundProperty, Colors.Green);

            
// 将光标当前所在位置到文本结尾的文字信息输出到页面上
            while (currentPointer.CompareTo(endPointer) == -1)
            {
                
string currentChar = "";

                TextPointer nextPointer 
= currentPointer.GetNextInsertionPosition(LogicalDirection.Forward);
                
if (nextPointer != null)
                {
                    richTextBox.Selection.Select(currentPointer, nextPointer);
                    
if (richTextBox.Selection.Text.Length != 0)
                        currentChar 
= richTextBox.Selection.Text;
                }

                lblMsg.Text 
+= currentChar;

                currentPointer 
= currentPointer.GetNextInsertionPosition(LogicalDirection.Forward);
            }
        }
    }
}



OK
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