淺談WPF之利用RichTextBox實現富文本編輯器

在實際應用中,富文本隨處可見,如留言板,聊天軟件,文檔編輯,特定格式內容等,在WPF開發中,如何實現富文本編輯呢?本文以一個簡單的小例子,簡述如何通過RichTextBox實現富文本編輯功能,主要實現複製,剪切,粘貼,撤銷,重做,保存,打開,文本加粗,斜體,下劃線,刪除線,左對齊,居中對齊,右對齊,兩端對齊,縮進,減少縮進,項目符號,數字符號,上標,下標,背景色,前景色,圖片,打印等功能,僅供學習分享使用,如有不足之處,還請指正。

 

什麼是RichTextBox?

 

使用RichTextBox可以顯示或編輯流內容,如文本,圖片,表格等,TextBox和RichTextBox都可以用於編輯文本,但使用場景不同。如果是單純的無格式的純文本,建議使用TextBox;如果是需要編輯帶格式的文本、圖像、表格或其他多種格式的內容時,RichTextBox 是更好的選擇。

 

什麼是流內容和流文檔?

 

通常情況下,所有在富文本編輯器中呈現的內容,都是流內容(FlowContent),而爲了呈現流內容的構建塊,稱爲流內容元素(Element)。不同的流內容元素,組成了流文檔(FlowDocument),RichTextBox是流文檔的託管對象之一。

流文檔旨在根據窗口大小、設備分辨率和其他環境變量來“重排內容”。 此外,流文檔還具有很多內置功能,包括搜索、能夠優化可讀性的查看模式以及更改字體大小和外觀的功能。 當易讀性是文檔的主要使用要求時,最適合使用流文檔。

 

涉及知識點

 

在通過RichTextBox實現富文本編輯器時,涉及到的知識點如下所示:

根據流內容的用途,可分爲兩個重要類別:

  1. Block 派生類:也稱爲“Block 內容元素”,或簡稱爲“Block 元素”。 繼承自 Block 的元素可用於將元素分組到一個公用父級下,或將公用屬性應用於某個組。

  2. Inline 派生類:也稱爲“Inline 內容元素”,或簡稱爲“Inline 元素”。 繼承自 Inline 的元素要麼包含在 Block 元素中,要麼包含在另一個 Inline 元素中。 Inline 元素通常用作在屏幕上呈現的內容的直接容器。 例如,Paragraph(Block 元素)可包含 Run(Inline 元素),而 Run 實際包含在屏幕上呈現的文本。

在實現富文本編輯器時,需要用到圖標實現,主要內容如下:

  1. 在本示例中圖標主要通過自定義路徑Path實現,其中Data屬性是Geometry類型,用於接收自定以的圖形。而用到的圖標類型數據,可以通過iconfont官網進行獲取。
  2. 在本示例中,用到很多圖標,爲了統一管理,創建資源字典,圖標數據作爲一種資源引入。

操作流文檔時,常見使用到的類,如下所示:

 

創建RichTextBox

 

RichTextBox託管流文檔對象,流文檔包含流內容,包括文本,段落,圖像,表格,等內容,創建語法如下所示:

<RichTextBox x:Name="richTextBox" AcceptsTab="True" Grid.Row="1" BorderThickness="1" BorderBrush="LightBlue" Margin="2" Padding="2" ScrollViewer.CanContentScroll="True" ScrollViewer.VerticalScrollBarVisibility="Auto">
	<RichTextBox.Document>
		<FlowDocument>
			<Paragraph>
				I am a sunny boy. My name is xxxx. I am from xxxx Primary School. I am over 1.5 meters old when I just turned 12. Alas, I may be a little fat because of eating too much sugar. A pair of pretty big eyes are inlaid under the dark hair and curved eyebrows. There is also a thin mouth.
			</Paragraph>
			<Paragraph>
				I like to play computer games. I play online whenever I have time, and my mother scolds me all day. I also like reading. Once, when I went to the library to read, I was fascinated by it. I was immersed in the ocean of knowledge and didn't remember to go home for dinner. I didn't want to leave until the library closed. I also like to play basketball. Every Saturday and Sunday, I will invite some friends to play basketball for a few hours.
			</Paragraph>
			<Paragraph>
				My advantage is that I love to move. Every morning I go outside to exercise, run, play the horizontal bar, etc. My math scores are also very good, but my Chinese and English scores are average, so my face is always filled with joy. My shortcoming is that I can't play table tennis, and I don't know what is going on. I just don't like it. This is me. If your hobbies are the same as mine, you can find me.
			</Paragraph>
			<Paragraph>
				thank you.
			</Paragraph>
		</FlowDocument>
	</RichTextBox.Document>
</RichTextBox>

 

編輯命令

 

爲了方便起見,WPF 提供由 ApplicationCommands、MediaCommands、ComponentCommands、NavigationCommands 和 EditingCommands 組成的常用命令庫,你也可以定義自己的命令。在實現富文本編輯器時,用到的命令主要有三種:

  1. ApplicationCommands,主要是應用程序中常見的命令,如:複製Copy,剪切Cut,粘貼Paste,重做Redo,撤銷Undo等。
  2. EditingCommands 提供了一組常見的編輯相關的命令,如:加粗Bold,斜體Italic,下劃線UnderLine,左對齊,右對齊,居中對齊,兩端對齊,縮進,減少縮進,項目符號,數字符號等。
  3. 自定義命令,默認RichTextBox並沒有提供相應的命令,所以需要根據功能自行定義,如:背景色,前景色,打印,打開,保存,上標,下標,圖像等。

 

編輯命令頁面佈局和綁定

 

使用WPF自帶的命令,需要指定Command和CommandTarget兩個屬性,否則將不起作用。其中Command直接使用Commnad="命令名稱",CommandTarget=“{Binding ElementName=控件名稱}”的格式進行綁定。

自定義命令,需要通過Command="{Binding 命令名稱}"的格式進行綁定。具體如下所示:

<StackPanel Orientation="Horizontal" Grid.Row="0">
	<Button ToolTip="打開" Command="{Binding OpenCommand}">
		<Path Data="{StaticResource icon_open}" Stretch="Fill" Fill="#1296db"></Path>
	</Button>
	<Button ToolTip="保存" Command="{Binding SaveCommand}">
		<Path Data="{StaticResource icon_save}" Stretch="Fill" Fill="#1296db"></Path>
	</Button>
	<GridSplitter Width="1" Margin="3 2 3 2" Background="LightGray" IsEnabled="False"></GridSplitter>
	<Button ToolTip="剪切" Command="ApplicationCommands.Cut" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_cut}" Stretch="Fill" Fill="Black"></Path>
	</Button>
	<Button ToolTip="複製" Command="ApplicationCommands.Copy" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_copy}" Stretch="Fill" Fill="#1296db"></Path>
	</Button>
	<Button ToolTip="粘貼" Command="ApplicationCommands.Paste" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_paste}" Stretch="Fill" Fill="#1296db"></Path>
	</Button>
	<Button ToolTip="撤銷" Command="ApplicationCommands.Undo" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_undo}" Stretch="Fill" Fill="#8a8a8a"></Path>
	</Button>
	<Button ToolTip="重做" Command="ApplicationCommands.Redo" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_redo}" Stretch="Fill" Fill="#8a8a8a"></Path>
	</Button>
	<GridSplitter Width="1" Margin="3 2 3 2" Background="LightGray" IsEnabled="False"></GridSplitter>
	<Button ToolTip="加粗" Command="EditingCommands.ToggleBold" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_bold}" Stretch="Fill" Fill="Black"></Path>
	</Button>
	<Button ToolTip="斜體" Command="EditingCommands.ToggleItalic" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_italic}" Stretch="Fill" Fill="LightGray"></Path>
	</Button>
	<Button ToolTip="下劃線" Command="EditingCommands.ToggleUnderline" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_underline}" Stretch="Fill" Fill="Gray"></Path>
	</Button>
	<Button ToolTip="刪除線" Command="{Binding SettingCommand}" CommandParameter="StrikeLine">
		<Path Data="{StaticResource icon_strikeline}" Stretch="Fill" Fill="Black"></Path>
	</Button>
	<Button ToolTip="左對齊" Command="EditingCommands.AlignLeft" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_left}" Stretch="Fill" Fill="Black" Stroke="LimeGreen"></Path>
	</Button>
	<Button ToolTip="居中對齊" Command="EditingCommands.AlignCenter" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_center}" Stretch="Fill" Fill="Black" Stroke="LimeGreen"></Path>
	</Button>
	<Button ToolTip="右對齊" Command="EditingCommands.AlignRight" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_right}" Stretch="Fill" Fill="Black" Stroke="LimeGreen"></Path>
	</Button>
	<Button ToolTip="兩端對齊" Command="EditingCommands.AlignJustify" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_justify}" Stretch="Fill" Fill="Black" Stroke="LimeGreen"></Path>
	</Button>
	<Button ToolTip="縮進" Command="EditingCommands.IncreaseIndentation" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_addident}" Stretch="Fill" Fill="DimGray"></Path>
	</Button>
	<Button ToolTip="減少縮進" Command="EditingCommands.DecreaseIndentation" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_lessident}" Stretch="Fill" Fill="DimGray"></Path>
	</Button>
	<Button ToolTip="項目編號" Command="EditingCommands.ToggleBullets" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_bullets}" Stretch="Fill" Fill="DimGray"></Path>
	</Button>
	<Button ToolTip="數字編號" Command="EditingCommands.ToggleNumbering" CommandTarget="{Binding ElementName=richTextBox}">
		<Path Data="{StaticResource icon_numbering}" Stretch="Fill" Fill="DimGray"></Path>
	</Button>
	<Button ToolTip="上標" Command="{Binding SettingCommand}" CommandParameter="Super">
		<Path Data="{StaticResource icon_upper}" Stretch="Fill" Fill="CadetBlue"></Path>
	</Button>
	<Button ToolTip="下標" Command="{Binding SettingCommand}" CommandParameter="Sub">
		<Path Data="{StaticResource icon_down}" Stretch="Fill" Fill="CadetBlue"></Path>
	</Button>
	<GridSplitter Width="1" Margin="3 2 3 2" Background="LightGray" IsEnabled="False"></GridSplitter>

	<Grid Background="White" Width="42" Height="30" Margin="3">
		<ComboBox Width="42" Height="30" BorderThickness="0" HorizontalAlignment="Left" VerticalAlignment="Center" SelectedIndex="0" BorderBrush="White" Background="White" Name="combBackground">
			<ComboBoxItem Background="#000000" Content="#000000"></ComboBoxItem>
			<ComboBoxItem Background="#FF0000" Content="#FF0000"></ComboBoxItem>
			<ComboBoxItem Background="#00FF00" Content="#00FF00"></ComboBoxItem>
			<ComboBoxItem Background="#0000FF" Content="#0000FF"></ComboBoxItem>
			<ComboBoxItem Background="#00AA00" Content="#00AA00"></ComboBoxItem>
			<ComboBoxItem Background="#AA0000" Content="#AA0000"></ComboBoxItem>
			<ComboBoxItem Background="#0000AA" Content="#0000AA"></ComboBoxItem>
			<ComboBoxItem Background="#AA00CC" Content="#AA00CC"></ComboBoxItem>
			<ComboBoxItem Background="#00BBCC" Content="#00BBCC"></ComboBoxItem>
			<ComboBoxItem Background="#555555" Content="#555555"></ComboBoxItem>
			<ComboBoxItem Background="#AAAAAA" Content="#AAAAAA"></ComboBoxItem>
			<ComboBoxItem Background="#BBBBBB" Content="#BBBBBB"></ComboBoxItem>
			<ComboBoxItem Background="#CCCCCC" Content="#CCCCCC"></ComboBoxItem>
			<ComboBoxItem Background="#DDDDDD" Content="#DDDDDD"></ComboBoxItem>
			<ComboBoxItem Background="#EEEEEE" Content="#EEEEEE"></ComboBoxItem>
			<ComboBoxItem Background="#FFFFFF" Content="#FFFFFF"></ComboBoxItem>
			<i:Interaction.Triggers>
				<i:EventTrigger EventName="SelectionChanged">
					<i:InvokeCommandAction Command="{Binding BgColorCommand}" CommandParameter="{Binding ElementName=combBackground, Path=SelectedItem}"/>
				</i:EventTrigger>
			</i:Interaction.Triggers>
		</ComboBox>
		<Button ToolTip="背景色" Width="30" Height="30" Padding="0" Margin="0" HorizontalAlignment="Left" VerticalAlignment="Center">
			<Path Data="{StaticResource icon_background}" Stretch="Fill"  Fill="{Binding ElementName=combBackground, Path=SelectedItem.Background}"  ></Path>
		</Button>
	</Grid>
	<Grid Background="White" Width="42" Height="30" Margin="3">
		<ComboBox Width="42" Height="30" BorderThickness="0" HorizontalAlignment="Left" VerticalAlignment="Center" SelectedIndex="0" BorderBrush="White" Background="White" Name="combForeground">
			<ComboBoxItem Background="#000000" Content="#000000"></ComboBoxItem>
			<ComboBoxItem Background="#FF0000" Content="#FF0000"></ComboBoxItem>
			<ComboBoxItem Background="#00FF00" Content="#00FF00"></ComboBoxItem>
			<ComboBoxItem Background="#0000FF" Content="#0000FF"></ComboBoxItem>
			<ComboBoxItem Background="#00AA00" Content="#00AA00"></ComboBoxItem>
			<ComboBoxItem Background="#AA0000" Content="#AA0000"></ComboBoxItem>
			<ComboBoxItem Background="#0000AA" Content="#0000AA"></ComboBoxItem>
			<ComboBoxItem Background="#AA00CC" Content="#AA00CC"></ComboBoxItem>
			<ComboBoxItem Background="#00BBCC" Content="#00BBCC"></ComboBoxItem>
			<ComboBoxItem Background="#555555" Content="#555555"></ComboBoxItem>
			<ComboBoxItem Background="#AAAAAA" Content="#AAAAAA"></ComboBoxItem>
			<ComboBoxItem Background="#BBBBBB" Content="#BBBBBB"></ComboBoxItem>
			<ComboBoxItem Background="#CCCCCC" Content="#CCCCCC"></ComboBoxItem>
			<ComboBoxItem Background="#DDDDDD" Content="#DDDDDD"></ComboBoxItem>
			<ComboBoxItem Background="#EEEEEE" Content="#EEEEEE"></ComboBoxItem>
			<ComboBoxItem Background="#FFFFFF" Content="#FFFFFF"></ComboBoxItem>
			<i:Interaction.Triggers>
				<i:EventTrigger EventName="SelectionChanged">
					<i:InvokeCommandAction Command="{Binding ForeColorCommand}" CommandParameter="{Binding ElementName=combForeground, Path=SelectedItem}"/>
				</i:EventTrigger>
			</i:Interaction.Triggers>
		</ComboBox>
		<Button ToolTip="前景色" Width="30" Height="30" Padding="0" Margin="0" HorizontalAlignment="Left" VerticalAlignment="Center">
			<Path Data="{StaticResource icon_foreground}" Stretch="Fill"  Fill="{Binding ElementName=combForeground, Path=SelectedItem.Background}"  ></Path>
		</Button>
	</Grid>
	<Button ToolTip="圖像" Command="{Binding SettingCommand}" CommandParameter="Image">
		<Path Data="{StaticResource icon_img}" Stretch="Fill" Fill="Goldenrod"></Path>
	</Button>
	<Button ToolTip="打印" Command="{Binding SettingCommand}" CommandParameter="Print">
		<Path Data="{StaticResource icon_print}" Stretch="Fill" Fill="Tomato"></Path>
	</Button>
	
</StackPanel>

 

自定義命令

 

在本示例中,後臺命令使用和屬性綁定,使用CommunityToolkit.Mvvm庫實現。後臺實現業務主要分爲三種:

1. 打開,保存命令

打開,保存主要實現對RichTextBox中的流文檔對象的序列化和反序列化,具體如下所示:

private IRelayCommand saveCommand;

public IRelayCommand SaveCommand
{
	get
	{
		if (saveCommand == null)
		{
			saveCommand = new RelayCommand(Save);
		}
		return saveCommand;
	}
}

private void Save()
{
	SaveFileDialog saveFileDialog = new SaveFileDialog();
	saveFileDialog.Title = "請選擇要保存的路徑";
	saveFileDialog.Filter = "富文本格式|*.xaml";
	bool? flag = saveFileDialog.ShowDialog();
	if (flag == true)
	{
		string _fileName=saveFileDialog.FileName;
		TextRange range;
		FileStream fStream;
		range = new TextRange(this.richTextBox.Document.ContentStart, this.richTextBox.Document.ContentEnd);
		fStream = new FileStream(_fileName, FileMode.Create);
		range.Save(fStream, DataFormats.XamlPackage);
		fStream.Close();
	}
}

private IRelayCommand openCommand;

public IRelayCommand OpenCommand
{
	get
	{
		if (openCommand == null)
		{
			openCommand = new RelayCommand(Open);
		}
		return openCommand;
	}
}

private void Open()
{
	TextRange range;
	FileStream fStream;
	OpenFileDialog openFileDialog = new OpenFileDialog();
	openFileDialog.Title = "請選擇要加載的文件";
	openFileDialog.Filter = "富文本格式|*.xaml";
	bool? flag = openFileDialog.ShowDialog();
	if (flag == true)
	{
		string _fileName = openFileDialog.FileName;
		if (File.Exists(_fileName))
		{
			range = new TextRange(this.richTextBox.Document.ContentStart, this.richTextBox.Document.ContentEnd);
			fStream = new FileStream(_fileName, FileMode.OpenOrCreate);
			range.Load(fStream, DataFormats.XamlPackage);
			fStream.Close();
		}
	}
}

 

顏色設置命令

 

顏色設置,主要用於將用戶選擇的顏色,賦值給用於選擇的流內容元素對象。如下所示:

private IRelayCommand<object> bgColorCommand;

public IRelayCommand<object> BgColorCommand
{
	get
	{
		if(bgColorCommand == null)
		{
			bgColorCommand = new RelayCommand<object>(BgColor);
		}
		return bgColorCommand;
	}
}

private void BgColor(object obj)
{
	if (obj == null)
	{
		return;
	}
	var item = obj as ComboBoxItem;
	if (item != null)
	{
		var color = item.Background;
		var buttonType = "Background";
		SetColor(buttonType, color);
	}
}

private IRelayCommand<object> foreColorCommand;

public IRelayCommand<object> ForeColorCommand
{
	get
	{
		if (foreColorCommand == null)
		{
			foreColorCommand = new RelayCommand<object>(ForeColor);
		}
		return foreColorCommand;
	}
}

private void ForeColor(object obj)
{
	if (obj == null)
	{
		return;
	}
	var item = obj as ComboBoxItem;
	if (item != null)
	{
		var color = item.Background;
		var buttonType = "Foreground";
		SetColor(buttonType, color);
	}
}

private void SetColor(string buttonType, Brush brush)
{
	var textSelection = this.richTextBox.Selection;
	if (textSelection == null)
	{
		return;
	}
	if (buttonType == "Background")
	{
		var propertyValue = textSelection.GetPropertyValue(TextElement.BackgroundProperty);
		var bgBrush = (Brush)propertyValue;
		if (bgBrush == brush)
		{
			textSelection.ApplyPropertyValue(TextElement.BackgroundProperty, Colors.White);
		}
		else
		{
			textSelection.ApplyPropertyValue(TextElement.BackgroundProperty, brush);
		}
	}
	if (buttonType == "Foreground")
	{
		var propertyValue = textSelection.GetPropertyValue(TextElement.ForegroundProperty);
		var foreground = (Brush)propertyValue;
		if (foreground == brush)
		{
			textSelection.ApplyPropertyValue(TextElement.ForegroundProperty, Colors.Black);
		}
		else
		{
			textSelection.ApplyPropertyValue(TextElement.ForegroundProperty, brush);
		}
	}
}

 

3. 其他設置命令

 

其他設置命令,如刪除線,上標,下標,圖像插入,打印等命令,如下所示:

private IRelayCommand<string> settingCommand;

public IRelayCommand<string> SettingCommand
{
	get
	{
		if(settingCommand == null)
		{
			settingCommand = new RelayCommand<string>(Setting);
		}
		return settingCommand;
	}
}

private void Setting(string buttonType)
{
	var textSelection = this.richTextBox.Selection;
	if (textSelection == null)
	{
		return;
	}
	if (buttonType == "StrikeLine")
	{
		var propertyValue = textSelection.GetPropertyValue(Inline.TextDecorationsProperty);
		var textDecorationCollection = (TextDecorationCollection)propertyValue;
		if (textDecorationCollection == TextDecorations.Strikethrough)
		{
			textSelection.ApplyPropertyValue(Inline.TextDecorationsProperty, null);
		}
		else
		{
			textSelection.ApplyPropertyValue(Inline.TextDecorationsProperty, TextDecorations.Strikethrough);
		}
	}else if (buttonType == "Super")
	{
		var propertyValue = textSelection.GetPropertyValue(Inline.BaselineAlignmentProperty);
		var supper = (BaselineAlignment)propertyValue;
		if (supper == BaselineAlignment.Superscript)
		{
			textSelection.ApplyPropertyValue(Inline.BaselineAlignmentProperty, BaselineAlignment.Top);
		}
		else
		{
			textSelection.ApplyPropertyValue(Inline.BaselineAlignmentProperty, BaselineAlignment.Superscript);
		}
	}
	else if(buttonType == "Sub")
	{
		var propertyValue = textSelection.GetPropertyValue(Inline.BaselineAlignmentProperty);
		var sub = (BaselineAlignment)propertyValue;
		if (sub == BaselineAlignment.Subscript)
		{
			textSelection.ApplyPropertyValue(Inline.BaselineAlignmentProperty, BaselineAlignment.Top);
		}
		else
		{
			textSelection.ApplyPropertyValue(Inline.BaselineAlignmentProperty, BaselineAlignment.Subscript);
		}
	}
	else if (buttonType == "Image")
	{
		OpenFileDialog openFileDialog = new OpenFileDialog();
		openFileDialog.Title = "請選擇需要插入的圖片";
		openFileDialog.Filter = "圖片文件|*.png";
		bool? flag = openFileDialog.ShowDialog();
		if (flag ==true)
		{
			var fileName = openFileDialog.FileName;
			var img = new Image() { Source = new BitmapImage(new Uri(fileName)), Stretch = Stretch.Uniform, Width = this.richTextBox.ActualWidth - 50 };
			var imgContainer = new BlockUIContainer(img);
			this.richTextBox.CaretPosition.InsertParagraphBreak();
			this.richTextBox.Document.Blocks.InsertBefore(this.richTextBox.CaretPosition.Paragraph, imgContainer);
		}
	}
	else if(buttonType == "Print")
	{
		PrintDialog pd = new PrintDialog();
		if ((pd.ShowDialog() == true))
		{
			//use either one of the below
			pd.PrintVisual(this.richTextBox as Visual, "打印富文本1");
			pd.PrintDocument((((IDocumentPaginatorSource)this.richTextBox.Document).DocumentPaginator), "打印富文本2");
		}
	}
}

 

示例截圖

 

主要實現複製,剪切,粘貼,撤銷,重做,保存,打開,文本加粗,斜體,下劃線,刪除線,左對齊,居中對齊,右對齊,兩端對齊,縮進,減少縮進,項目符號,數字符號,上標,下標,背景色,前景色,圖片,打印等功能,效果如下:

 

源碼下載

 

關於源碼下載,可關注公衆號,回覆WPFRICH進行下載,如下所示:

 

參考文獻

 

流文檔介紹:https://learn.microsoft.com/zh-cn/dotnet/desktop/wpf/advanced/flow-document-overview?view=netframeworkdesktop-4.8

RichTextBox介紹:https://learn.microsoft.com/zh-cn/dotnet/desktop/wpf/controls/richtextbox-overview?view=netframeworkdesktop-4.8

ApplicationCommands介紹:https://learn.microsoft.com/zh-cn/dotnet/api/system.windows.input.applicationcommands?view=windowsdesktop-8.0

EditingCommands介紹:https://learn.microsoft.com/zh-cn/dotnet/api/system.windows.documents.editingcommands?view=windowsdesktop-8.0

以上就是【淺談WPF之利用RichTextBox實現富文本編輯器】的全部內容。

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