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庖丁解牛Asp.net3.5控件和组件开发技术系列—事件和数据回发机制(二)

作者 佚名技术 来源 NET编程 浏览 发布时间 2012-05-20
是如何应用它们的。声明事件代码如下:

/// <summary>
/// 获得本书更多内容,请看:
/// http://blog.csdn.net/ChengKing/archive/2008/08/18/2792440.aspx
/// </summary>
private new static readonly object EventPageIndexChanged = new object();
[Category("Action"), Description("翻页事件")]
public event GridPageChangedEventHandler PageIndexChanged
{
   add
   {
     base.Events.AddHandler(Grid.EventPageIndexChanged, value);
   }
   remove
   {
     base.Events.RemoveHandler(Grid.EventPageIndexChanged, value);
   }
}

宸戦写偬寡喘5.3.1弌准讐議互丼楕並周鹿栽双燕斤?base.Events?並周議兆各葎PageIndexChanged?溜熔窃侏葎岻念厘断協吶議溜熔窃侏GridPageChangedEventHandler。

哈窟並周議宰伉旗鷹泌和?

/// <summary>
/// 資誼云慕厚謹坪否,萩心:
/// http://blog.csdn.net/ChengKing/archive/2008/08/18/2792440.aspx
/// </summary>
protected override bool OnBubbleEvent(object source, EventArgs e)
{
   bool handled = false;
   if (e is GridCommandEventArgs)
   {
     if ((((GridCommandEventArgs)(e)).CommandSource) is LinkButton)
     {
       LinkButton lb=((LinkButton)(((GridCommandEventArgs)(e)). Command Source));
       if (lb.CommandName == "Page")
       {
         if (lb.CommandArgument == "ButtonFirst")
         {
           GridPageChangedEventArgs ee = new GridPageChangedEventArgs();
           if (this.CurrentPageIndex != 0)
           {
             this.CurrentPageIndex = 0;
             ee.CurrentPageIndex = this.CurrentPageIndex;
             ee.PageCount = this.PageCount;
             ee.PageSize = this.PageSize;
             this.OnPageIndexChanged(ee);
           }
           handled = true;
         }

         if (lb.CommandArgument == "ButtonNext")
         {
           GridPageChangedEventArgs ee = new GridPageChangedEventArgs();
           if (this.CurrentPageIndex < this.PageCount - 1)
           {
             this.CurrentPageIndex += 1;
             ee.CurrentPageIndex = this.CurrentPageIndex;
             ee.PageCount = this.PageCount;
             ee.PageSize = this.PageSize;
             this.OnPageIndexChanged(ee);
           }
           handled = true;
         }

         if (lb.CommandArgument == "ButtonPrev")
         {
           GridPageChangedEventArgs ee = new GridPageChangedEventArgs();
           if (this.CurrentPageIndex > 0)
           {
             this.CurrentPageIndex -= 1;
             ee.CurrentPageIndex = this.CurrentPageIndex;
             ee.PageCount = 

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