【www.bbyears.com--WPF】
RichTextBox比较的强大,支持富文本和简单文本等,可以实现出类似Word的那样的效果。
今天自定义一个支持富文本显示的RichTextBox控件。
代码如下 XAML代码:xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
HorizontalAlignment="Stretch" VerticalAlignment="Stretch"
VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto">
后台代码:
代码如下using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace Kaitone.DetectiveHelper.UI.Controls.RichTextBox
{
///
/// RichboxTextShow.xaml 的交互逻辑
///
public partial class RichboxTextShow : UserControl
{
public static readonly DependencyProperty TextyProperty =
DependencyProperty.Register("Text",typeof(string),
typeof(RichboxTextShow),new PropertyMetadata(string.Empty,new
PropertyChangedCallback(TextyPropertyChanged)
));
private static void TextyPropertyChanged(DependencyObject sender,DependencyPropertyChangedEventArgs args)
{
RichboxTextShow editer = new RichboxTextShow();
}
public string Text
{
get { return ConvertToRtfString(this.mainRTB); }
set {
if (!String.IsNullOrEmpty(value))
{
LoadFromRtfString(value,this.mainRTB);
}
else
{
this.mainRTB.Document.Blocks.Clear();
}
}
}
private static void LoadFromRtfString(string rtf, System.Windows.Controls.RichTextBox richTextBox)
{
if (string.IsNullOrEmpty(rtf))
{
throw new ArgumentNullException();
}
TextRange textRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd);
using (MemoryStream ms = new MemoryStream())
{
using (StreamWriter sw = new StreamWriter(ms))
{
sw.Write(rtf);
sw.Flush();
ms.Seek(0, SeekOrigin.Begin);
textRange.Load(ms, DataFormats.Rtf);
}
}
}
private static string ConvertToRtfString(System.Windows.Controls.RichTextBox rcb)
{
string resultstring = string.Empty;
using (MemoryStream stream=new MemoryStream())
{
TextRange documentTextRange = new TextRange(rcb.Document.ContentStart, rcb.Document.ContentEnd);
string dataformt = DataFormats.Rtf;
documentTextRange.Save(stream, dataformt);
stream.Seek(0, SeekOrigin.Begin);
using(StreamReader reader=new StreamReader(stream,Encoding.Default)){
resultstring = reader.ReadToEnd();
}
}
return resultstring;
}
public RichboxTextShow()
{
InitializeComponent();
}
}
}
说明:
1、依赖属性声明:可以通过控件点出来的。
代码如下 public static readonly DependencyProperty TextyProperty =DependencyProperty.Register("Text",typeof(string),
typeof(RichboxTextShow),new PropertyMetadata(string.Empty,new
PropertyChangedCallback(TextyPropertyChanged)
));
2、富文本和字符串String之间的转换:
代码如下private static void LoadFromRtfString(string rtf, System.Windows.Controls.RichTextBox richTextBox)
{
if (string.IsNullOrEmpty(rtf))
{
throw new ArgumentNullException();
}
TextRange textRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd);
using (MemoryStream ms = new MemoryStream())
{
using (StreamWriter sw = new StreamWriter(ms))
{
sw.Write(rtf);
sw.Flush();
ms.Seek(0, SeekOrigin.Begin);
textRange.Load(ms, DataFormats.Rtf);
}
}
}
private static string ConvertToRtfString(System.Windows.Controls.RichTextBox rcb)
{
string resultstring = string.Empty;
using (MemoryStream stream=new MemoryStream())
{
TextRange documentTextRange = new TextRange(rcb.Document.ContentStart, rcb.Document.ContentEnd);
string dataformt = DataFormats.Rtf;
documentTextRange.Save(stream, dataformt);
stream.Seek(0, SeekOrigin.Begin);
using(StreamReader reader=new StreamReader(stream,Encoding.Default)){
resultstring = reader.ReadToEnd();
}
}
return resultstring;
}