项目中需要使用数据绑定的方式实现跑马灯效果的Label，故重构了Label控件；具体代码如下
using System;
using System.Timers; using System.Windows; using System.Windows.Controls; using Tool; namespace iMasteRayClient.View.ViewUnit { public class UIScrollingLabel : Label { /// <summary> /// 滚动一循环字幕停留的秒数,单位为毫秒,默认值停留3秒 /// </summary> public int StopSecond { get { return _StopSecond; } set { _StopSecond = value; } } /// <summary> /// 滚动的速度 /// </summary> public double RunSpeed { get { return _RunSpeed; } set { _RunSpeed = value; MarqueeTimer.Interval = _RunSpeed; } } /// <summary> /// 滚动文字源 /// </summary> public string TextSource { get { return _TextSource; } set { _TextSource = value; _TempString = _TextSource + " "; _OutText = _TempString; } } private string SetContent { get { return Content.ToString(); } set { Content = value; } } /// <summary> /// 构造函数 /// </summary> public UIScrollingLabel(double m_Width, double m_Height,string m_Text) { this.Width = m_Width; this.Height = m_Height; MarqueeTimer.Interval = _RunSpeed;//文字移动的速度 MarqueeTimer.Enabled = false ; //开启定时触发事件 MarqueeTimer.Elapsed += new ElapsedEventHandler(MarqueeTimer_Elapsed);//绑定定时事件 this.Loaded += new RoutedEventHandler(ScrollingTextControl_Loaded);//绑定控件Loaded事件 this.TargetUpdated += UIScrollingLabel_TargetUpdated;//绑定使用数据绑定方式修改Content后的响应事件，即判断是否开启滚动定时器 } private void UIScrollingLabel_TargetUpdated(object sender, System.Windows.Data.DataTransferEventArgs e) { TextSource = this.Content.ToString() ; if (GetTextDisplayWidthHelper.GetTextDisplayWidth(this) > this.Width) { MarqueeTimer.Enabled = true; } else { MarqueeTimer.Enabled = false; } } void ScrollingTextControl_Loaded(object sender, RoutedEventArgs e) { _TextSource = SetContent; _TempString = _TextSource + " "; _OutText = _TempString; _SignTime = DateTime.Now; } void MarqueeTimer_Elapsed(object sender, ElapsedEventArgs e) { if (string.IsNullOrEmpty(_OutText)) return; if (_OutText.Substring(1) + _OutText[0] == _TempString) { if (_IfFirst) { _SignTime = DateTime.Now; } if ((DateTime.Now - _SignTime).TotalMilliseconds > _StopSecond) { _IfFirst = true; } else { _IfFirst = false; return; } } _OutText = _OutText.Substring(1) + _OutText[0]; Dispatcher.BeginInvoke(new Action(() => { SetContent = _OutText; })); } /// <summary> /// 定时器 /// </summary> Timer MarqueeTimer = new Timer(); /// <summary> /// 滚动文字源 /// </summary> String _TextSource = ""; /// <summary> /// 输出文本 /// </summary> String _OutText = string.Empty; /// <summary> /// 过度文本存储 /// </summary> string _TempString = string.Empty; /// <summary> /// 文字的滚动速度 /// </summary> double _RunSpeed = 200; DateTime _SignTime; bool _IfFirst = true; /// <summary> /// 滚动一循环字幕停留的秒数,单位为毫秒,默认值停留3秒 /// </summary> int _StopSecond = 3000; } }其中需要判断文本的显示长度，故实现了一个测量文本长度的工具类：
using System;
using System.Windows; using System.Windows.Media; using System.Globalization; using System.Windows.Controls; namespace Tool { static class GetTextDisplayWidthHelper { public static Double GetTextDisplayWidth(Label label) { return GetTextDisplayWidth(label.Content.ToString(), label.FontFamily, label.FontStyle, label.FontWeight, label.FontStretch, label.FontSize); } public static Double GetTextDisplayWidth(string str, FontFamily fontFamily, FontStyle fontStyle, FontWeight fontWeight, FontStretch fontStretch,double FontSize) { var formattedText = new FormattedText( str, CultureInfo.CurrentUICulture, FlowDirection.LeftToRight, new Typeface(fontFamily, fontStyle, fontWeight, fontStretch), FontSize, Brushes.Black ); Size size = new Size(formattedText.Width, formattedText.Height); return size.Width; } } }参考的文章，连接：http://www.cnblogs.com/lanymy/archive/2012/07/11/2586643.html 表示感谢