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：
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></{0}:MyButton>")]
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<Size Width="" Height=""/>)
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();
}
}
}
}
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <%@ Register assembly="MyControls" namespace="MyControls" tagprefix="cc1" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <!--自定义服务器按钮控件--> <cc1:MyButton ID="MyButton1" Size-Height="30" Size-Width="290" OnClick="btnSubmit" Text="我是一个单独的提交按钮(自定义服务器)" runat="server" /> </div> </form> </body> </html>
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。