TOC

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Rich Text控件:

从后台代码创建FlowDocument

到目前为止,我们一直在XAML中创建FlowDocument。 在XAML中表示文档是情理之中的,因为XAML非常像HTML,它在整个Internet上用于创建信息页面。 但是,这并不意味着您无法从后台代码创建FlowDocument - 您完全可以,因为每个元素都是一个类,您可以使用C#代码进行实例化和添加。

作为一个最基本的例子,这是我们的“Hello,world!” 从后台代码而不是XAML创建的第一篇文章的示例:

<Window x:Class="WpfTutorialSamples.Rich_text_controls.CodeBehindFlowDocumentSample"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="CodeBehindFlowDocumentSample" Height="200" Width="300">
    <Grid>
        <FlowDocumentScrollViewer Name="fdViewer" />
    </Grid>
</Window>
using System;
using System.Windows;
using System.Windows.Documents;
using System.Windows.Media;

namespace WpfTutorialSamples.Rich_text_controls
{
	public partial class CodeBehindFlowDocumentSample : Window
	{
		public CodeBehindFlowDocumentSample()
		{
			InitializeComponent();

			FlowDocument doc = new FlowDocument();

			Paragraph p = new Paragraph(new Run("Hello, world!"));
			p.FontSize = 36;
			doc.Blocks.Add(p);

			p = new Paragraph(new Run("The ultimate programming greeting!"));
			p.FontSize = 14;
			p.FontStyle = FontStyles.Italic;
			p.TextAlignment = TextAlignment.Left;
			p.Foreground = Brushes.Gray;
			doc.Blocks.Add(p);

			fdViewer.Document = doc;
		}
	}
}

实现完全相同的东西对比XAML的简洁,这真是难以置信:

<FlowDocument>
    <Paragraph FontSize="36">Hello, world!</Paragraph>
    <Paragraph FontStyle="Italic" TextAlignment="Left" FontSize="14" Foreground="Gray">The ultimate programming greeting!</Paragraph>
</FlowDocument>

这不是重点 - 有时候适合用后台代码处理,如您所见,它也能实现。

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