摘要:控制項學習:氣泡事件(BubbleEvent)
1.實作CompositeControl
public class SearchControlBubbleUp : CompositeControl
{
2.覆寫CreateChildControls 加入子控制項
protected override void CreateChildControls() { 
this.Controls.Clear(); btnSearch = new Button(); btnSearch.ID = "btn"; btnSearch.Text = "搜索"; btnSearch.CommandName = "ButtonSearchClick"; tbSearchText = new TextBox(); tbSearchText.ID = "tb"; this.Controls.Add(btnSearch); this.Controls.Add(tbSearchText); 
}3.實作OnBubbleEvent
實點在第7行if (ce.CommandName == "ButtonSearchClick") 的判斷為true後,回傳handled=true
則onBublleEvent則不在往上傳遞
01 protected override bool OnBubbleEvent(object sender, EventArgs e)
02 {
03 bool handled = false;
04 if (e is CommandEventArgs)
05
{
06 CommandEventArgs ce = (CommandEventArgs)e;
07 if (ce.CommandName == "ButtonSearchClick")
08 {
09 SearchEventArgs args = new SearchEventArgs();
10 args.SearchValue = this.Text;
11 OnButtonSearchClick(args);
12 handled = true;
13
}
14 }
15 this.RaiseBubbleEvent(sender, e);
16 return handled;
17 }
protected override bool OnBubbleEvent(object sender, EventArgs e) 02
{ 03
bool handled = false; 04
if (e is CommandEventArgs) 05
{ 
06
CommandEventArgs ce = (CommandEventArgs)e; 07
if (ce.CommandName == "ButtonSearchClick") 08
{ 09
SearchEventArgs args = new SearchEventArgs(); 10
args.SearchValue = this.Text; 11
OnButtonSearchClick(args); 12
handled = true; 13
} 14
} 15
this.RaiseBubbleEvent(sender, e); 16
return handled; 17
}Ps:個人學習片段記錄,程式並不完整