【下载文档:  ASP.NET自定义Web服务器控件之Button控件.txt 】

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ASP.NET自定义Web服务器控件之Button控件
本文实例讲述了ASP.NET自定义Web服务器控件之Button控件实现方法。分享给大家供大家参考。具体实现方法如下：
复制代码 代码如下:using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
//自定义web服务器button
namespace MyControls
{
[DefaultProperty("Text")]
[ToolboxData("<{0}:MyButton runat=server>")]
public class MyButton : WebControl,IPostBackEventHandler
{
[Bindable(true)]
[Category("Appearance")]
[DefaultValue("")]
[Localizable(true)]
public string Text
{
get
{
String s = (String)ViewState["Text"];
return ((s == null) ? String.Empty : s);
}
set
{
ViewState["Text"] = value;
}
}
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]//生成属性时，按属性内部内容生成(例如在此控件里面(Size-Height,Size_Width))
//[PersistenceMode(PersistenceMode.InnerProperty)]//以子标签的形式显示(例如)
public Size Size
{
get
{
if (ViewState["Size"] == null) {
ViewState["Size"] = new Size();
}
return (Size)ViewState["Size"];
}
set
{
ViewState["Size"] = value;
}
}
//定义控件的标签形式
protected override HtmlTextWriterTag TagKey
{
get
{
return HtmlTextWriterTag.Input;
}
}
//初始化
protected override void OnInit(EventArgs e)
{
this.Style.Add("width", Size.Width + "px");
this.Style.Add("height", Size.Height + "px");
this.Attributes.Add("type", "submit"); //提交按钮
this.Attributes.Add("value",Text);
this.Attributes.Add("name",this.UniqueID);//回发事件必须有的一个属性
base.OnInit(e);
}
//打印当前控件的内容
protected override void RenderContents(HtmlTextWriter output)
{
//output.Write(Text);
}
public delegate void ClickHandle();
private object key=new object();
public event ClickHandle Click {
add {
this.Events.AddHandler(key,value);
}
remove {
this.Events.RemoveHandler(key, value);
}
}
//按钮的回发事件
public void RaisePostBackEvent(string eventArgument)
{
ClickHandle handle = (ClickHandle)base.Events[key];
if (handle != null) {
handle();
}
}
}
}
复制代码 代码如下:<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%@ Register assembly="MyControls" namespace="MyControls" tagprefix="cc1" %>

复制代码 代码如下:using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
//自定义服务器控件
protected void btnSubmit() {
Response.Write("我是自定义服务器控件的点击事件");
}
}
希望本文所述对大家的asp.net程序设计有所帮助。