WPF-20：richtextbox相关操作

WPF中的richtextbox与winform中的richtextbox的使用不同，看看下面的基本操作：

一、取出richTextBox里面的内容
 (1)将richTextBox的内容以字符串的形式取出

 string xw = System.Windows.Markup.XamlWriter.Save(richTextBox.Document);

 (2)将richTextBox的类容以二进制数据的方法取出

     FlowDocument document = richTextBox.Document;

      System.IO.Stream s = new System.IO.MemoryStream(); 

      System.Windows.Markup.XamlWriter.Save(document, s);         

      byte[] data = new byte[s.Length];

      s.Position = 0;

      s.Read(data, 0, data.Length);

       s.Close(); 

二、richTextBox赋值
 (1)将字符串转换为数据流赋值给richTextBox中  

 System.IO.StringReader sr = new System.IO.StringReader(xw);

   System.Xml.XmlReader xr = System.Xml.XmlReader.Create(sr);

   richTextBox1.Document = (FlowDocument)System.Windows.Markup.XamlReader.Load(xr);

(2)将二进制数据赋值给richTextBox

    System.IO.Stream ss = new System.IO.MemoryStream(data);

     FlowDocument doc = System.Windows.Markup.XamlReader.Load(ss) as FlowDocument;

      ss.Close();

      richTextBox1.Document = doc;

三、清空RichTextBox的方法

System.Windows.Documents.FlowDocument doc = RichTextBox.Document;

doc.Blocks.Clear(); 

四、如何将一个String类型的字符串赋值给richTextBox

myRTB.Document = new FlowDocument(new Paragraph(new Run(myString))); 

FlowDocument doc = new FlowDocument();

 Paragraph p = new Paragraph();  // Paragraph 类似于 html 的 P 标签

 Run r = new Run(myString);      // Run 是一个 Inline 的标签

 p.Inlines.Add(r);

 doc.Blocks.Add(p);

 myRTB.Document = doc;

五、将richTextBox中的内容以rtf的格式完全取出

     string rtf = string.Empty;

             TextRange textRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd);

             using (System.IO.MemoryStream ms = new System.IO.MemoryStream())

             {

                 textRange.Save(ms, System.Windows.DataFormats.Rtf);

                 ms.Seek(0, System.IO.SeekOrigin.Begin);

                 System.IO.StreamReader sr = new System.IO.StreamReader(ms);

                 rtf = sr.ReadToEnd();

             }

六、其他操作

 复制：   ToolBarCopy.Command = System.Windows.Input.ApplicationCommands.Copy;

 剪切：   toolBarCut.Command = System.Windows.Input.ApplicationCommands.Cut;

 粘贴：   ToolBarPaste.Command = System.Windows.Input.ApplicationCommands.Paste;

 撤销：   ToolBarUndo.Command = System.Windows.Input.ApplicationCommands.Undo;

 复原：   ToolBarRedo.Command = System.Windows.Input.ApplicationCommands.Redo;

 文字居中：  toolBarContentCenter.Command = System.Windows.Documents.EditingCommands.AlignCenter;

 文字居右：  toolBarContentRight.Command = System.Windows.Documents.EditingCommands.AlignRight;

 文字居左：  toolBarContentLeft.Command = System.Windows.Documents.EditingCommands.AlignLeft;

 有序排列：  ToolBarNumbering.Command = System.Windows.Documents.EditingCommands.ToggleNumbering;

 无序排列：  ToolBarBullets.Command = System.Windows.Documents.EditingCommands.ToggleBullets;

 字体变大：

             int fontSize = Convert.ToInt32(richTextBox.Selection.GetPropertyValue(TextElement.FontSizeProperty));

             fontSize++;

             richTextBox.Selection.ApplyPropertyValue(TextElement.FontSizeProperty, fontSize.ToString());