完成事件功能有两种方法:“冒泡”和“包含”
具体实现代码如下:
![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
Code
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.ComponentModel;
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using System.ComponentModel.Design;
8![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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namespace OnClick
10![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
{
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public class OnClick : CompositeControl
12![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
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private Button _button;
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private TextBox _textBox;
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//定义事件
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private static readonly object EventSubmitKey = new object();
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[
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Bindable(true), Category("Appearance"), DefaultValue(""), Description("")
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]
20![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
public string ButtonText
{
21![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
get
{
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EnsureChildControls();
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return _button.Text;
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}
25![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
set
{
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EnsureChildControls();
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_button.Text = value;
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}
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}
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[
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Bindable(true), Category("Appearance"), DefaultValue(""), Description("")
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]
33![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
public string Text
{
34![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
get
{
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EnsureChildControls();
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return _textBox.Text;
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}
38![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
set
{
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EnsureChildControls();
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_textBox.Text = value;
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}
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}
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//定义事件属性
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public event EventHandler Submit
45![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
46![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
add
{
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Events.AddHandler(EventSubmitKey, value);
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}
49![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
remove
{
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Events.AddHandler(EventSubmitKey, value);
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}
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}
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//定义事件接受方
54![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
protected virtual void OnSubmit(EventArgs e)
{
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EventHandler SubmitHandler = (EventHandler)Events[EventSubmitKey];
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if (SubmitHandler != null)
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SubmitHandler(this, e);
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}
59![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**///// 实现Submit事件引发的事件处理程序
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//private void _button_Click(Object source, EventArgs e)
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//{
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// OnSubmit(EventArgs.Empty);
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//}
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// 重写OnBubbleEvent方法,执行事件冒泡,响应用户操作发起事件
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protected override bool OnBubbleEvent(object source, EventArgs e)
66![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
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bool handled = false;
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if (e is CommandEventArgs)
69![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
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CommandEventArgs ce = (CommandEventArgs)e;
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if (ce.CommandName == "Submit")
72![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
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OnSubmit(EventArgs.Empty);
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handled = true;
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}
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}
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return handled;
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}
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// 重写ICompositeControlDesignerAccessor接口的RecreateChildContrls方法
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protected override void RecreateChildControls()
81![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
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EnsureChildControls();
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}
84![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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//重写CreateChildControls方法,将子控件添加到复合控件中
86![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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protected override void CreateChildControls()
88![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
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Controls.Clear();
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_button = new Button();
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_textBox = new TextBox();
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_button.ID = "btn";
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//_button.Click += new EventHandler(_button_Click);
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_button.CommandName = "Submit";
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this.Controls.Add(_button);
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this.Controls.Add(_textBox);
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}
98![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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//重写Render方法,呈现控件中其他的HTML代码
100![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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protected override void Render(HtmlTextWriter output)
102![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
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output.AddAttribute(HtmlTextWriterAttribute.Border, "0px");
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output.AddAttribute(HtmlTextWriterAttribute.Cellpadding, "5px");
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output.AddAttribute(HtmlTextWriterAttribute.Cellspacing, "0px");
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output.RenderBeginTag(HtmlTextWriterTag.Table);
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output.RenderBeginTag(HtmlTextWriterTag.Tr);
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output.RenderBeginTag(HtmlTextWriterTag.Td);
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_textBox.RenderControl(output);
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output.RenderEndTag();
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output.RenderBeginTag(HtmlTextWriterTag.Td);
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_button.RenderControl(output);
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output.RenderEndTag();
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output.RenderEndTag();
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output.RenderEndTag();
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}
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}
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}
119![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
posted @
2009-02-18 10:54
挟风凌月
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