所属类别：.NET

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using System;using System.Web.UI;using System.Web.UI.WebControls;using System.ComponentModel;[assembly:TagPrefix("Beyondbit.App.Web.UI.WebControls", "BBit")]namespace Beyondbit.App.Web.UI.WebControls{#region ElapsedEventArgs classpublic class ElapsedEventArgs : EventArgs{public int SignalTime;}#endregion/// /// 客户端定时器/// [DefaultProperty("Enabled"),ToolboxData("<{0}:ClientTimer runat=server></{0}:ClientTimer>")]public class ClientTimer : System.Web.UI.Control , System.Web.UI.IPostBackEventHandler // , System.Web.UI.IPostBackDataHandler{public delegate void ElapsedEventHandler( object sender, ElapsedEventArgs e );public event ElapsedEventHandler Elapsed;protected virtual void OnElapsed( ElapsedEventArgs e){if ( Elapsed != null )Elapsed(this, e);}private int signalTime = 0;private int interval = 0 ;[Description("设置或获取定时时间(毫秒)")]public int Interval{set{if( value <= 0 )throw new ArgumentException( "Interval时间间隔不能小于或等于0" );interval = value ;}get{return interval ;}}private bool enabled = false ;[Description("设置或获取定时器是否启用")]public bool Enabled{set{ enabled = value ; }get{ return enabled ; }}//public bool AutoReset = false ;[Description("停止定时器")]public void Stop(){enabled = false ;}protected override void OnPreRender(EventArgs e){base.OnPreRender (e);if( this.enabled == false ) return;if( interval == 0 ) throw new ArgumentException( "定时器已启动，但Interval时间间隔没有设置" );//jsstring jsId = this.UniqueID + "_js";string clientFunction = this.UniqueID + "_OnElapsed";signalTime = signalTime + this.interval ;string js = "" +"window.setTimeout( "+clientFunction+" , "+ this.signalTime +" );" +"function " + clientFunction + "(){" + Page.GetPostBackEventReference( this , "" + this.signalTime ) +";}" +"";Page.RegisterStartupScript( jsId , js );}/// /// 将此控件呈现给指定的输出参数。/// /// 要写出到的 HTML 编写器 protected override void Render(HtmlTextWriter output){//output.Write(Text);}#region IPostBackEventHandler 成员public void RaisePostBackEvent( string eventArgument ){if( eventArgument == "" ) throw new Exception( "eventArgument参数为空！" );signalTime = int.Parse( eventArgument ) ;ElapsedEventArgs e = new ElapsedEventArgs();e.SignalTime = signalTime ;this.OnElapsed( e );}#endregion#region IPostBackDataHandler 成员//public void RaisePostDataChangedEvent()//{//// TODO: 添加 ClientTimer.RaisePostDataChangedEvent 实现//}////public bool LoadPostData(string postDataKey, System.Collections.Specialized.NameValueCollection postCollection)//{//// TODO: 添加 ClientTimer.LoadPostData 实现////string s = postCollection[ this.UniqueID + "_signalTime" ];//if( s == null s == "" ) return false;////signalTime = Convert.ToInt32( s );////return false;//}#endregion}}关闭本页

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