br style="clear:both" / br /

<%@ Page Language="C#" %>
<!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>Master/Detail</title>
<style type="text/css">

        .categoryContainer div
        {
            width: 100px;
            font-size:small;
            border: 1px solid black;
            float:left;
            padding:3px;
            margin:3px;
        }

        .categoryContainer a
        {
            text-decoration:none;
        }

        .categoryContainer div:hover
        {
            background-color:#eeeeee;
        }

        #selected
        {
            background-color:silver;
        }

    </style>
</head>
<body>
    <form /><br />

//clear:both该属性的值指出了不允许有浮动对象的边。

//通俗的讲：这段代码的做用是：清除同行元素，不允许其它元素与之在一行内。

        <asp:ListView
            ID="lstMovies"
            DataSourceId="srcMovies"
            runat="server">
            <LayoutTemplate>
                <ol>
                <asp:PlaceHolder
                    />

        <asp:SqlDataSource
            />
            </SelectParameters>
        </asp:SqlDataSource>
    </div>
    </form>
</body>
</html>