ToggleButton:用图片来代替CheckBox

本文介绍如何使用ToggleButtonExtender控件将CheckBox替换为图片,实现更丰富的视觉效果。示例展示了不同状态下(启用/禁用、选中/未选中)CheckBox对应的图片配置。

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ToggleButton扩展器控件可以将CheckBox用一对图片替代,用更加丰富的视觉效果来表示CheckBox的选中/未选中状态。
示例运行效果:

图(1)

图(2)

图(3)

StyleSheet.css代码示例
*
{
    font-family
: Tahoma;
    font-size
: 12px;
}


fieldset
{
    margin
: 5px;
    padding
: 5px;
}


.demoheading
{
    padding-bottom
:20px;
    color
:#5377A9;
    font-family
:Arial,Sans-Serif;
    font-weight
:bold;
    font-size
:1.5em;
}

ToggleButtonDemo.aspx代码示例:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ToggleButtonDemo.aspx.cs" Inherits="Chapter08_ToggleButtonDemo" %>

<!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>ToggleButton Demo</title>
    
<link href="StyleSheet.css" rel="Stylesheet" type="text/css" />
</head>
<body>
    
<form id="ToggleButtonForm" runat="server">
        
<asp:ScriptManager ID="sm" runat="server" />
        
<div class="demoheading">用图片来代替CheckBox</div>
        
<asp:UpdatePanel ID="up" runat="server">
            
<ContentTemplate>
                
<asp:CheckBox ID="CheckBox1" Checked="true" Text="ASP.NET" runat="server" /><br />
                
<ajaxToolkit:ToggleButtonExtender ID="ToggleButtonExtender1" runat="server" 
                    TargetControlID
="CheckBox1"
                    CheckedImageUrl
="Images/checked.png" 
                    UncheckedImageUrl
="Images/unchecked.png"
                    ImageHeight
="16" 
                    ImageWidth
="16" 
                    CheckedImageAlternateText
="取消" 
                    UncheckedImageAlternateText
="选中" />
                
                
<asp:CheckBox ID="CheckBox2" Checked="true" Text="ASP.NET AJAX" runat="server" /><br />
                
<ajaxToolkit:ToggleButtonExtender ID="ToggleButtonExtender2" runat="server" 
                    TargetControlID
="CheckBox2"
                    CheckedImageUrl
="Images/checked.png" 
                    UncheckedImageUrl
="Images/unchecked.png"
                    ImageHeight
="16" 
                    ImageWidth
="16"
                    CheckedImageAlternateText
="取消" 
                    UncheckedImageAlternateText
="选中" />
                
<!--
                    TargetControlID:该扩展器目标CheckBox控件的ID,即将要被一对图片替换的CheckBox的ID
                    CheckedImageUrl:用来替换CheckBox处于启用且选中状态下的图片的URL
                    UncheckedImageUrl:用来替换CheckBox处于启用且未选中状态下的图片的URL
                    ImageHeight:用来替换CheckBox的图片的高度,单位像素(px)
                    ImageWidth:用来替换ChecnBox的图片的宽度,单位像素(px)
                    CheckedImageAlternateText:当鼠标悬浮在图片上时提示点击图片将取消
                    UncheckedImageAlternateText:当鼠标悬浮在图片上时提示点击图片将选中
                
-->
                
                
<asp:CheckBox ID="CheckBox3" Checked="true" Text="C#" runat="server" Enabled="False" /><br />
                
<ajaxToolkit:ToggleButtonExtender ID="ToggleButtonExtender3" runat="server" 
                    TargetControlID
="CheckBox3" 
                    ImageWidth
="16"
                    ImageHeight
="16"
                    CheckedImageUrl
="Images/checked.png" 
                    UncheckedImageUrl
="Images/unchecked.png"
                    DisabledCheckedImageUrl
="Images/checked.png" 
                    DisabledUncheckedImageUrl
="Images/unchecked.png" />
                
                
<asp:CheckBox ID="CheckBox4" Checked="false" Text="VB.NET" runat="server" Enabled="False" /><br /><br />
                
<ajaxToolkit:ToggleButtonExtender ID="ToggleButtonExtender4" runat="server"
                    TargetControlID
="CheckBox4"
                    ImageWidth
="16"
                    ImageHeight
="16"
                    CheckedImageUrl
="Images/checked.png" 
                    UncheckedImageUrl
="Images/unchecked.png"
                    DisabledCheckedImageUrl
="Images/checked.png" 
                    DisabledUncheckedImageUrl
="Images/unchecked.png" />
                
<!--
                    DisabledCheckedImageUrl:用来替换CheckBox处于禁用且选中状态下的图片的URL
                    DisabledUncheckedImageUrl:用来替换CheckBox处于禁用且未选中状态下的图片的URL
                
-->

                
<asp:Button ID="btnOK" runat="server" Text="Submit" OnClick="btnOK_Click" /><br /><br />
                
<asp:Label ID="lbResult" runat="server" Text="[No response provided yet]" />                
            
</ContentTemplate>
        
</asp:UpdatePanel>
    
</form>
</body>
</html>

ToggleButtonDemo.aspx.cs代码示例:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class Chapter08_ToggleButtonDemo : System.Web.UI.Page
{
    
protected void Page_Load(object sender, EventArgs e)
    
{

    }

    
protected void btnOK_Click(object sender, EventArgs e)
    
{
        lbResult.Text 
= string.Format("you <b>{0}</b> like ASP.NET <br /> you <b>{1}</b> like ASP.NET AJAX <br />" + 
            
"you <b>{2}</b> like C# <br /> you <b>{3}</b> like VB.NET ",(CheckBox1.Checked ? "do" : "do not"),
            (CheckBox2.Checked 
? "do" : "do not"),(CheckBox3.Checked ? "do":"do not"),(CheckBox4.Checked ? "do":"do not"));
    }

}

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