《RichTextBox 》——— RichTextBox 数据绑定___代码添加

WP7 里面 richtextbox 不支持 HTML 也不支持 RTF 不支持 HTML 。写 XAML 你会发现他有套自己的解析标准。。。。悲催
同时 ricttextbox 也没啥可以用来绑定内容的属性。。。。这情况下我们的 ViewModel 中的类人要绑定打richtextbox 怎么办呢？？？

下面是我遭遇的实际问题：
在做喂饭 (饭否客户端) 时拿到的微博内容是一个字符串里面带有 @ # 还有url什的。。我想要展现这条微博同时 @ # URL 要做成可点击的 link，这是我考虑到使用 RICHTEXTBOX ，然后。。。额。。。就发生上述地问题。。。

刚开始思考这个问题时我第一想法是重写空间在里面做一个可以进行数据绑定的动态属性然后在动态属性的Change 事件中解析动态属性的内容在控件的blocks 添加要展现的内容。。。

然后就产生了下面这样奇葩一样的控件

  1 using System;
  2 using System.Net;
  3 using System.Windows;
  4 using System.Windows.Controls;
  5 using System.Windows.Documents;
  6 using System.Windows.Ink;
  7 using System.Windows.Input;
  8 using System.Windows.Media;
  9 using System.Windows.Media.Animation;
 10 using System.Windows.Shapes;
 11 using System.Text.RegularExpressions;
 12 using System.ComponentModel;
 13 
 14 namespace WeiFan.UI.CustomeControl
 15 {
 16     public class FanFouContentBox :System.Windows.Controls.RichTextBox
 17     {
 18          /// <summary>
 19         /// 设置DependencyProperty属性
 20         /// </summary>
 21         public  DependencyProperty ContentProperty;
 22         /// <summary>
 23         /// 设置Content的访问器
 24         /// </summary>
 25         public string Content
 26         {
 27             set 
 28             {
 29                 SetValue(ContentProperty, value);
 30             }
 31             get
 32             {
 33                 return (string)GetValue(ContentProperty);
 34             }
 35         }
 36 
 37         public FanFouContentBox()
 38         {            
 39             //设置DependencyProperty的默认描述
 40             PropertyMetadata _metadata = new PropertyMetadata(string.Empty, OnContentChanged); ;
 41             ////设置默认值勤
 42             //_metadata.DefaultValue = null;
 43             ////设置是否影响布局
 44             //_metadata.AffectsMeasure = true;
 45             ////设置是否影响到其子控件
 46             //_metadata.Inherits = true;
 47             ////设置属性变化时的处理方法
 48             //_metadata.PropertyChangedCallback += OnImagePropertyChanged;
 49 
 50             ContentProperty = DependencyProperty.Register("Content", typeof(string), typeof(FanFouContentBox), _metadata);
 51             Content = this.Xaml;
 52         }
 53        
 54         /// <summary>
 55         /// 设置回调方法
 56         /// </summary>
 57         /// <param name="obj"></param>
 58         /// <param name="args"></param>
 59         void OnContentChanged(DependencyObject obj, DependencyPropertyChangedEventArgs args)
 60         {
 61             try
 62             {
 63                 Regex rootRegex = new Regex(@"(((http://)|(ftp://)|(https://)|(zune://)+)[^(\s)]{1,})|(#[^\s]{1,}#)|(((@{1})[^(\s|@)]{1,}))");//(@"(([http|ftp|https|zune]+://[^\s]*)|(#[^\s]*#)|)");
 64                 string target = args.NewValue as string;//@"http://t.cn/heMORnhttp://t.cn/heMORn 万能Url正则表达式[http,ftp,news,telnet.....]——史上最全Url正则表达式（基于RFC1738?） - 正则表达式 - 拼吾爱程序人生 http://t.cn/heMORn 1sfsdfsdfsdfsdfsdfsdfsdfdsfsdfsfsdfsdfsfsfsfsf1 Regex Tester – RegexPal http://regexpa 1sdfsfsdfsdfsdfs1";//string.Empty;
 65                 target = target.Replace("<b>", string.Empty);
 66                 target = target.Replace("</b>", string.Empty);
 67                 target = System.Net.HttpUtility.HtmlDecode(target);
 68                 Paragraph rootParagraph = new Paragraph();
 69 
 70                 MatchCollection mc = rootRegex.Matches(target);
 71                 if (mc.Count != 0)
 72                 {
 73                     int flag = 0;
 74                     for (int i = 0; i < mc.Count; i++)
 75                     {
 76                         if (mc[i].Index != 0)
 77                         {
 78                             Run r = new Run();
 79                             r.Foreground = this.Foreground;
 80                             r.Text = target.Substring(flag, mc[i].Index - flag);
 81 
 82                             flag = flag + r.Text.Length;
 83                             rootParagraph.Inlines.Add(r);
 84                         }
 85 
 86                         //Regex urlRegex = new Regex(@"[http|ftp|https|zune]+://[^\s]*");
 87                         //Regex trendRegex = new Regex(@"#[^\s]*#");
 88 
 89 
 90 
 91 
 92                         if (mc[i].Value.StartsWith("#"))
 93                         {
 94                             //热点
 95                             if (mc[i].Value.Length > 2)
 96                             {
 97                                 Hyperlink h = new Hyperlink();
 98                                 //h.TargetName = "_blank";
 99                                 System.Collections.Generic.Dictionary<string, string> param = new System.Collections.Generic.Dictionary<string, string>();
100 
101                                 string text = (mc[i].Value).Remove(0, 1);
102                                 text = text.Remove(text.Length - 1, 1);
103                                 param.Add("query", text);
104 
105                                 h.NavigateUri = new Uri("/SearchResult.xaml?" + WeiFan.Utility.HttpUtility.URLQueryStringBuilder(param), UriKind.Relative);
106 
107                                 Run r = new Run();
108                                 r.Text = mc[i].Value;
109                                 h.Inlines.Add(r);
110                                 rootParagraph.Inlines.Add(h);
111                                 flag = flag + mc[i].Length;
112                             }
113                         }
114                         else if (mc[i].Value.StartsWith("@"))
115                         {
116                             System.Collections.Generic.Dictionary<string, string> param = new System.Collections.Generic.Dictionary<string, string>();
117                             param.Add("content", mc[i].Value);
118                             //PhoneApplicationFrame.Navigate(new Uri("/PublishStatus.xaml?" + WeiFan.Utiltiy.HttpUtility.URLQueryStringBuilder(param), UriKind.Relative));
119 
120                             Hyperlink h = new Hyperlink();
121                             
122                             h.NavigateUri = new Uri("/PublishStatus.xaml?" + WeiFan.Utility.HttpUtility.URLQueryStringBuilder(param), UriKind.Relative);
123 
124                             Run r = new Run();
125                             r.Text = mc[i].Value;
126                             h.Inlines.Add(r);
127                             rootParagraph.Inlines.Add(h);
128                             flag = flag + mc[i].Length;
129                         }
130 
131                         else
132                         {
133                             //URL
134                             Hyperlink h = new Hyperlink();
135                             h.TargetName = "_blank";
136                             h.NavigateUri = new Uri(mc[i].Value);
137                             Run r = new Run();
138                             r.Text = mc[i].Value;
139                             h.Inlines.Add(r);
140                             rootParagraph.Inlines.Add(h);
141                             flag = flag + mc[i].Length;
142                         }
143 
144 
145 
146                     }
147                     if (flag < target.Length - 1)
148                     {
149                         Run r = new Run();
150                         r.Text = target.Substring(flag, target.Length - flag);
151                         flag = flag + r.Text.Length;
152                         rootParagraph.Inlines.Add(r);
153                     }
154                 }
155                 else
156                 {
157                     rootParagraph.Inlines.Add((new Run()).Text = target);
158                 }
159                 this.Blocks.Clear();
160                 this.Blocks.Add(rootParagraph);
161             }
162             catch (Exception e)
163             {
164                 System.Diagnostics.Debug.WriteLine("Exception in Custom.RichTextBox.OnContentChanged:" + e.Message);
165             }
166         }
167 
168       
169     }
170 }

不过这方法有个非常蛋疼的缺陷就是。。。我这里涉及到解析多种文本那就蛋疼了。。。每种挨个重写一次。。。
后来看到了 behavior 这种好东西。。。意识到可以通过 behavior 吧解析和动态属性给剥离出来

直接上代码

  1 using System;
  2 using System.Net;
  3 using System.Text.RegularExpressions;
  4 using System.Windows;
  5 using System.Windows.Controls;
  6 using System.Windows.Documents;
  7 using System.Windows.Ink;
  8 using System.Windows.Input;
  9 using System.Windows.Media;
 10 using System.Windows.Media.Animation;
 11 using System.Windows.Shapes;
 12 using System.Windows.Interactivity;
 13 
 14 namespace WeiFan.UI.Behavior
 15 {
 16     public class ConvertFanFouContentBehavior :Behavior<RichTextBox>
 17     {
 18         public static DependencyProperty ContentProperty
 19             = DependencyProperty.RegisterAttached(
 20                 "Content", typeof(string),
 21                 typeof(RichTextBox),
 22                 new PropertyMetadata(null, OnContentChanged));
 23 
 24         public string Content
 25         {
 26             set
 27             {
 28                 SetValue(ContentProperty, value);
 29             }
 30             get
 31             {
 32                 return (string)GetValue(ContentProperty);
 33             }
 34         }
 35 
 36         public bool IsEnable { get; set; }
 37 
 38         public ConvertFanFouContentBehavior()
 39         {
 40             IsEnable = true;
 41             
 42         }
 43 
 44         private static void OnContentChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
 45         {
 46             string content = e.NewValue as string;
 47 
 48             ConvertFanFouContentBehavior sender = d as ConvertFanFouContentBehavior;
 49 
 50             if (!string.IsNullOrWhiteSpace(content) && d!=null)
 51             {
 52                 sender.ConvertFanfouContent(content);
 53             }
 54         }
 55 
 56         void ConvertFanfouContent(string content)
 57         {
 58             try
 59             {
 60                 Regex rootRegex = new Regex(@"(((http://)|(ftp://)|(https://)|(zune://)+)[^(\s)]{1,})|(#[^\s]{1,}#)|(((@{1})[^(\s|@)]{1,}))");//(@"(([http|ftp|https|zune]+://[^\s]*)|(#[^\s]*#)|)");
 61                 string target = content as string;//@"http://t.cn/heMORnhttp://t.cn/heMORn 万能Url正则表达式[http,ftp,news,telnet.....]——史上最全Url正则表达式（基于RFC1738?） - 正则表达式 - 拼吾爱程序人生 http://t.cn/heMORn 1sfsdfsdfsdfsdfsdfsdfsdfdsfsdfsfsdfsdfsfsfsfsf1 Regex Tester – RegexPal http://regexpa 1sdfsfsdfsdfsdfs1";//string.Empty;
 62                 target = target.Replace("<b>", string.Empty);
 63                 target = target.Replace("</b>", string.Empty);
 64                 target = System.Net.HttpUtility.HtmlDecode(target);
 65                 Paragraph rootParagraph = new Paragraph();
 66 
 67                 MatchCollection mc = rootRegex.Matches(target);
 68                 if (mc.Count != 0)
 69                 {
 70                     int flag = 0;
 71                     for (int i = 0; i < mc.Count; i++)
 72                     {
 73                         if (mc[i].Index != 0)
 74                         {
 75                             Run r = new Run();
 76                             r.Foreground = this.AssociatedObject.Foreground;
 77                             r.Text = target.Substring(flag, mc[i].Index - flag);
 78 
 79                             flag = flag + r.Text.Length;
 80                             rootParagraph.Inlines.Add(r);
 81                         }
 82 
 83                         //Regex urlRegex = new Regex(@"[http|ftp|https|zune]+://[^\s]*");
 84                         //Regex trendRegex = new Regex(@"#[^\s]*#");
 85 
 86 
 87 
 88 
 89                         if (mc[i].Value.StartsWith("#"))
 90                         {
 91                             //热点
 92                             if (mc[i].Value.Length > 2)
 93                             {
 94                                 Hyperlink h = new Hyperlink();
 95                                 //h.TargetName = "_blank";
 96                                 System.Collections.Generic.Dictionary<string, string> param = new System.Collections.Generic.Dictionary<string, string>();
 97 
 98                                 string text = (mc[i].Value).Remove(0, 1);
 99                                 text = text.Remove(text.Length - 1, 1);
100                                 param.Add("query", text);
101 
102                                 h.NavigateUri = new Uri("/SearchResult.xaml?" + WeiFan.Utility.HttpUtility.URLQueryStringBuilder(param), UriKind.Relative);
103 
104                                 Run r = new Run();
105                                 r.Text = mc[i].Value;
106                                 h.Inlines.Add(r);
107                                 rootParagraph.Inlines.Add(h);
108                                 flag = flag + mc[i].Length;
109                             }
110                         }
111                         else if (mc[i].Value.StartsWith("@"))
112                         {
113                             System.Collections.Generic.Dictionary<string, string> param = new System.Collections.Generic.Dictionary<string, string>();
114                             param.Add("content", mc[i].Value);
115                             //PhoneApplicationFrame.Navigate(new Uri("/PublishStatus.xaml?" + WeiFan.Utiltiy.HttpUtility.URLQueryStringBuilder(param), UriKind.Relative));
116 
117                             Hyperlink h = new Hyperlink();
118 
119                             h.NavigateUri = new Uri("/PublishStatus.xaml?" + WeiFan.Utility.HttpUtility.URLQueryStringBuilder(param), UriKind.Relative);
120 
121                             Run r = new Run();
122                             r.Text = mc[i].Value;
123                             h.Inlines.Add(r);
124                             rootParagraph.Inlines.Add(h);
125                             flag = flag + mc[i].Length;
126                         }
127 
128                         else
129                         {
130                             //URL
131                             Hyperlink h = new Hyperlink();
132                             h.TargetName = "_blank";
133                             h.NavigateUri = new Uri(mc[i].Value);
134                             Run r = new Run();
135                             r.Text = mc[i].Value;
136                             h.Inlines.Add(r);
137                             rootParagraph.Inlines.Add(h);
138                             flag = flag + mc[i].Length;
139                         }
140 
141 
142 
143                     }
144                     if (flag < target.Length - 1)
145                     {
146                         Run r = new Run();
147                         r.Text = target.Substring(flag, target.Length - flag);
148                         flag = flag + r.Text.Length;
149                         rootParagraph.Inlines.Add(r);
150                     }
151                 }
152                 else
153                 {
154                     rootParagraph.Inlines.Add((new Run()).Text = target);
155                 }
156                 this.AssociatedObject.Blocks.Clear();
157                 this.AssociatedObject.Blocks.Add(rootParagraph);
158             }
159             catch (Exception e)
160             {
161                 System.Diagnostics.Debug.WriteLine("Exception in Custom.RichTextBox.OnContentChanged:" + e.Message);
162             }
163         }
164 
165     }
166 }

然后嘛。。。

在 XMAL 里面使用这个 behavior

1 <RichTextBox  x:Name="rtb_content" FontSize="24"  Width="365"  TextWrapping="Wrap" >
2                                 <i:Interaction.Behaviors>
3                                     <Behavior:ConvertFanFouContentBehavior Content="{Binding Path=Content}"></Behavior:ConvertFanFouContentBehavior>
4                                 </i:Interaction.Behaviors>
5                             </RichTextBox>

然后，。。。就没有然后了

转自：http://www.wpdevn.com/showtopic-32.aspx

posted @ 2012-06-14 11:52 ╰→劉じ尛鶴阅读(1174) 评论(0) 编辑收藏举报

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《RichTextBox 》——— RichTextBox 数据绑定___代码添加

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