本文實例講述了ASP.NET自定義Web服務器控件之Button控件實現方法。分享給大家供大家參考。具體實現方法如下：
復制代碼 代碼如下: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;
//自定義web服務器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)]//生成屬性時，按屬性內部內容生成(例如在此控件裡面(Size-Height,Size_Width))
//[PersistenceMode(PersistenceMode.InnerProperty)]//以子標簽的形式顯示(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;
}
}
//定義控件的標簽形式
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"); //提交按鈕
this.Attributes.Add("value",Text);
this.Attributes.Add("name",this.UniqueID);//回發事件必須有的一個屬性
base.OnInit(e);
}
//打印當前控件的內容
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);
}
}
//按鈕的回發事件
public void RaisePostBackEvent(string eventArgument)
{
ClickHandle handle = (ClickHandle)base.Events[key];
if (handle != null) {
handle();
}
}
}
}
復制代碼 代碼如下:<%@ 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>
<!--自定義服務器按鈕控件-->
<cc1:MyButton ID="MyButton1" Size-Height="30" Size-Width="290" OnClick="btnSubmit" Text="我是一個單獨的提交按鈕(自定義服務器)" runat="server" />
</div>
</form>
</body>
</html>
復制代碼 代碼如下: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)
{
}
//自定義服務器控件
protected void btnSubmit() {
Response.Write("我是自定義服務器控件的點擊事件");
}
}
希望本文所述對大家的asp.net程序設計有所幫助。
