WPF custom Rich Text display control in asp.net

RichTextBox is more powerful, supporting rich text and simple text, and so on, to achieve the same effect as word.

Today, customize a RichTextBox control that supports rich text display.

The code is as follows

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XAML Code: <usercontrol x:class= "Kaitone.DetectiveHelper.UI.Controls.RichTextBox.RichboxTextShow" Xmlns= "Http://schemas.microsoft.com/winfx/2006/xaml/presentation" 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= "D:designwidth=" > <Grid> <richtextbox name= "MAINRTB" acceptsreturn= "true" isreadonly= "true" borderbrush= "Transparent" borderthickness= "0" background= "Transparent" Horizontalalignment= "Stretch" verticalalignment= "Stretch" verticalscrollbarvisibility= "Auto" horizontalscrollbarvisibility= "Auto" > </RichTextBox> </Grid> </UserControl>

Background code:

The code is as follows

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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 { <summary> The interactive logic of Richboxtextshow.xaml </summary> 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 (); } } }

Description

1, dependency property declaration: Can be through the control point out.

The code is as follows	Copy Code
public static readonly DependencyProperty Textyproperty = Dependencyproperty.register ("Text", typeof (String), typeof (Richboxtextshow), new PropertyMetadata (string. Empty,new Propertychangedcallback (textypropertychanged) ));

2. Conversions between rich text and string strings:

The code is as follows

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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 }