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asp.net WPF 走马灯 文字滚动 自定义控件

时间:2012-07-12 00:00:00 编辑:简简单单 来源:转载

 

 代码如下

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Controls;
using System.ComponentModel;
using System.Drawing;
using System.Timers;
using System.Windows;

namespace WpfDemoNew.Control
{
    ///


    /// Label走马灯自定义控件
    ///

    [ToolboxBitmap(typeof(Label))] //设置工具箱中显示的图标
    public class ScrollingTextControl:Label
    {
        ///
        /// 定时器
        ///

        Timer MarqueeTimer = new Timer();
        ///
        /// 滚动文字源
        ///

        String _TextSource = "滚动文字源";
        ///
        /// 输出文本
        ///

        String _OutText = string.Empty;
        ///
        /// 文字的滚动速度
        ///

        double _RunSpeed = 1000;

        ///


        /// 构造函数
        ///

        public ScrollingTextControl()
        {
            MarqueeTimer.Interval = _RunSpeed;//文字移动的速度
            MarqueeTimer.Enabled = true;      //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
        }


        void ScrollingTextControl_Loaded(object sender, RoutedEventArgs e)
        {
            _TextSource = SetContent;
            _OutText = _TextSource + "   ";
        }
       

        void MarqueeTimer_Elapsed(object sender, ElapsedEventArgs e)
        {
            if (string.IsNullOrEmpty(_OutText)) return;
            _OutText = _OutText.Substring(1) + _OutText[0];
            Dispatcher.BeginInvoke(new Action(() => {
                SetContent = _OutText;           
            }));
        }

        ///


        /// 滚动的速度
        ///

        [Description("文字滚动的速度")] //显示在属性设计视图中的描述
        public double RunSpeed
        {
            get { return _RunSpeed; }
            set
            {
                _RunSpeed = value;
                MarqueeTimer.Interval = _RunSpeed;
            }
        }

        ///


        /// 滚动文字源
        ///

        [Description("文字滚动的速度")]
        public string TextSource
        {
            get { return _TextSource; }
            set
            {
                _TextSource = value;
                _OutText = _TextSource;
            }
        }

        private string SetContent
        {
            get { return Content.ToString(); }
            set
            {
                Content = value;
            }
        }
    }
}

以上放到cs文件中 然后 编译 就可以在工具箱中看到ScrollingTextControl 名称的label控件

 代码如下

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Window21" Height="300" Width="300" xmlns:my="clr-namespace:WpfDemoNew.Control">
   
       
   

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