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标题 ASP.NET自定义Web服务器控件之Button控件
内容
    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></{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();
    }
    }
    }
    }
    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" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">
    <html xmlns="">
    <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>
    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。
随便看

 

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更新时间:2025/5/21 0:31:47