asp.net-css页面布局的应用-经典盒子模型_c#

css构造练习.aspx代码如下：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="CSS构造练习.aspx.cs" Inherits="CSS构造练习" %>

<!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>
    <style type="text/css">
        #div_head,#div_foot
        { border:1px solid gray;
          text-align:center;
          padding:3px;
          height:30px;
          background-color:Gray;
        }
        #div_left{float:left;
                  text-align:center;
                  background-color:Yellow;
                  border:1px solid black;
                  width:200px;
                  height:50px}
        #div_right{float:right;
                   text-align:center;
                   background-color:Yellow;
                   border :1px solid blue;
                    width:500px;
                    height:50px
                    }
                    .clr{ clear:both;}<%--clear作用--%>
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div style="width:750px">
    <div id="div_head" >题头</div>
    <div id="div_main">
    <div id="div_left">左</div>
    <div id="div_right">右</div>
    <div class="clr"></div>
    </div> 
    <div id="div_foot">题尾</div>   
    </div>
    </form>
</body>
</html>


效果如图：

asp.net-css页面布局的应用-经典盒子模型_css_02