C#委托在自定义控件中的使用

主要事件如下：

  /// </summary>
  /// <param name="adg">DataGrid控件名</param>
  /// <param name="NewBind">数据绑定事件委托</param>
  /// <param name="iPageSize">每页显示数</param>
  public void SetTarget(DataGrid adg,BindDataDelegate NewBind,int iPageSize) {
   _dg=adg;
   BindData=new BindDataDelegate(NewBind);

   this.First.Click+= new System.Web.UI.ImageClickEventHandler(this.NavigationButton_Click);
   this.Previous.Click += new System.Web.UI.ImageClickEventHandler(this.NavigationButton_Click);
   this.Next.Click += new System.Web.UI.ImageClickEventHandler(this.NavigationButton_Click);
   this.Lastly.Click += new System.Web.UI.ImageClickEventHandler(this.NavigationButton_Click);
   _dg.DataBinding += new System.EventHandler(this.BeforeDataBinding);

   _dg.AllowPaging = true;
   _dg.AllowCustomPaging = false;
   _dg.PagerStyle.Visible = false;
   pagesize=iPageSize;
   _dg.PageSize = pagesize;
   _dg.PagerStyle.Mode = PagerMode.NumericPages;
   _dg.PagerStyle.HorizontalAlign = HorizontalAlign.Right;   
  }

 

 

 private void NavigationButton_Click(object sender, System.Web.UI.ImageClickEventArgs e) {
   string strCommandName=((ImageButton)sender).ID;//取得事件的对象名

   switch(strCommandName) {
    case "First":
     _dg.CurrentPageIndex=0;//跳转到首页
     PageOperate();
     break;
    case "Previous":
     _dg.CurrentPageIndex=Math.Max(_dg.CurrentPageIndex-1,0);//跳转到上一页
     PageOperate();
     break;
    case "Next":
     _dg.CurrentPageIndex=Math.Min(_dg.CurrentPageIndex+1,_dg.PageCount-1);//跳转到下一页
     PageOperate();
     break;
    case "Lastly":
     _dg.CurrentPageIndex=_dg.PageCount-1;//跳转到最后一页
     PageOperate();
     break;
   }  
   BindData();//绑定数据
  }

 

 

  //分页按钮事件
  private void NavigationButton_Click(object sender, System.Web.UI.ImageClickEventArgs e) {
   string strCommandName=((ImageButton)sender).ID;//取得事件的对象名

   switch(strCommandName) {
    case "First":
     _dg.CurrentPageIndex=0;//跳转到首页
     PageOperate();
     break;
    case "Previous":
     _dg.CurrentPageIndex=Math.Max(_dg.CurrentPageIndex-1,0);//跳转到上一页
     PageOperate();
     break;
    case "Next":
     _dg.CurrentPageIndex=Math.Min(_dg.CurrentPageIndex+1,_dg.PageCount-1);//跳转到下一页
     PageOperate();
     break;
    case "Lastly":
     _dg.CurrentPageIndex=_dg.PageCount-1;//跳转到最后一页
     PageOperate();
     break;
   }  
   BindData();//绑定数据
  }