GridView固定表头(不用javascript只用CSS!，很好用)

GridView固定表头(不用javascript只用CSS!，很好用)：

效果图：

代码：
<!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>GridView固定表头清清月儿http://blog.csdn.net/21aspnet </title>
        <style>
.Freezing
   {

   position:relative ;

table-layout:fixed;
   top:expression(this.offsetParent.scrollTop);

z-index: 10;
   }

.Freezing
th{text-overflow:ellipsis;overflow:hidden;white-space:
nowrap;padding:2px;}
</style>
</head>
<body
style="font-size=12px">
    <form id="form1" runat="server">

<div style="overflow-y: scroll; height: 200px;width:300px"
id="dvBody">
                   <asp:GridView ID="GridView1"
runat="server"    AutoGenerateColumns="False" CellPadding="3"
OnRowDeleting="GridView1_RowDeleting"
OnRowEditing="GridView1_RowEditing"

OnRowUpdating="GridView1_RowUpdating"
OnRowCancelingEdit="GridView1_RowCancelingEdit" BackColor="White"
BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" Font-Size="12px"
OnRowCreated="GridView1_RowCreated" >

<FooterStyle BackColor="White" ForeColor="#000066"
/>
                        <Columns>

<asp:BoundField DataField="身份证号码" HeaderText="编号" ReadOnly="True"
/>
                            <asp:BoundField DataField="邮政编码"
HeaderText="邮政编码" SortExpression="邮政编码" />

<asp:BoundField DataField="家庭住址" HeaderText="家庭住址"
/>
                            <asp:BoundField DataField="姓名"
HeaderText="姓名" />


</Columns>
                        <RowStyle ForeColor="#000066"
/>
                        <SelectedRowStyle BackColor="#669999"
Font-Bold="True" ForeColor="White" />

<PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left"
CssClass="ms-formlabel DataGridFixedHeader"/>

<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" CssClass="Freezing"/>

</asp:GridView>
        </div>