一个简单的自定义控件的事件处理示例 [IPostBackEventHandler]

最新推荐文章于 2022-07-20 09:06:07 发布

weixin_30367169

最新推荐文章于 2022-07-20 09:06:07 发布

阅读量118

点赞数

CC 4.0 BY-SA版权

文章标签： ui

原文链接：http://www.cnblogs.com/bndy/archive/2010/03/26/1696937.html

本文介绍了一个自定义的 ASP.NET Web 控件，该控件通过 PostBack 机制处理点击事件。控件实现了 IPostBackEventHandler 接口，并通过委托 SClickDelegate 来触发事件处理函数 OnSClick。此外，还展示了如何渲染 HTML 元素并为每个元素绑定点击事件。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

代码

public class ClickEventArgs : System.EventArgs
{
private string _cuPg;

public ClickEventArgs(string arg)
{
_cuPg = arg;
}

public string CuPg
{
get { return _cuPg; }
}
}

public delegate void SClickDelegate(object sender, ClickEventArgs e);

public class TC : System.Web.UI.Control, IPostBackEventHandler
{
public event SClickDelegate SClick;

private string _currentArg = string.Empty;

public string CurrentArg
{
get { return _currentArg; }
set { _currentArg = value; }
}

public TC()
{
}

protected override void RenderChildren(HtmlTextWriter writer)
{
base.RenderChildren(writer);

for(int i=0; i <10; i++)
{
writer.AddAttribute(HtmlTextWriterAttribute.Name, this.UniqueID + "_CustomerControlBndy");
writer.RenderBeginTag(HtmlTextWriterTag.A);
if (i.ToString() == _currentArg)
{
writer.AddAttribute(HtmlTextWriterAttribute.Disabled, "true");
}
else
{
writer.AddAttribute(HtmlTextWriterAttribute.Href, this.Page.GetPostBackClientHyperlink(this, i.ToString()));
}

writer.Write(i.ToString());
writer.RenderEndTag();
writer.WriteBreak();
}
}

public void OnSClick(ClickEventArgs e)
{
if (this.SClick != null)
{
_currentArg = e.CuPg;
SClick(this, e);
}
}

#region IPostBackEventHandler 成员

void IPostBackEventHandler.RaisePostBackEvent(string eventArgument)
{
this.RaisePostBackEvent(eventArgument);
}

protected virtual void RaisePostBackEvent(string arg)
{
this.OnSClick(new ClickEventArgs(arg));
}

#endregion
}

转载于:https://www.cnblogs.com/bndy/archive/2010/03/26/1696937.html