话不多说，先把代码附上吧
代码
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="PrintOrder.aspx.cs" Inherits="SalesOrder_PrintOrder" %>
<!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>打印商品发货单</title>
<style type="text/css">
body,table { font-family: Arial, Helvetica, sans-serif; font-size: 14px; }
.btn{display:none;}
.STYLE1 {font-size: 18px;font-weight: bold;}
</style>
<style media="print" type="text/css">
.Noprint{display:none;}
.PageNext{page-break-after: always;}
</style>
</head>
<body>
<form id="form1" runat="server">
<object classid="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2" height="0" id="WebBrowser" width="0"></object>
<input name="Button" onclick="document.all.WebBrowser.ExecWB(7,1);document.getElementById('btnPrint').click();" class="Noprint" type="button" value="打印并预览" id="Button1" />
<asp:Button ID="btnPrint" runat="server" Text="Button" OnClick="btnPrint_Click" CssClass="btn" /><asp:HiddenField ID="HFPrint" runat="server" /> <a onclick="window.close()">关闭</a>
<table width="800" border="0" cellpadding="0" cellspacing="0">
<tr>
<td style=" 500px;54; height:50;">
<h1>
<b><center>商品发货单</center></b></h1>
</td>
<td colspan="4">
||||||||||||||||||||||||||||||||||||||||||||
<br />
灵德订单：<asp:Label ID="lblLDID" runat="server" ></asp:Label>
</td>
</tr>
<tr>
<td style="height:35;" colspan="5">
<span class="STYLE1">收件人信息</span></td>
</tr>
<tr>
<td height="120" colspan="5" align="left" valign="top">
<table width="100%" border="1" cellspacing="0" cellpadding="0">
<tr>
<td style="60px;">
订购平台</td>
<td style="140px;" align="center">
<asp:Label ID="lblBuyChannel" runat="server" ></asp:Label></td>
<td style="60px;">
平台ID</td>
<td align="center" style="140px;">
<asp:Label ID="lblBuyChannelID" runat="server" ></asp:Label></td>
</tr>
<tr>
<td style="60px;">
交易时间</td>
<td align="center" style="140px;">
<asp:Label ID="lblTradeTime" runat="server" ></asp:Label></td>
<td style="60px;">
收件人</td>
<td align="center" style="140px;">
<asp:Label ID="lblSJR" runat="server" ></asp:Label></td>
</tr>
<tr>
<td style="60px;">
送货省市</td>
<td align="center" style="140px;">
<asp:Label ID="lblDelvCity" runat="server" ></asp:Label></td>
<td style="60px;">
受理客服</td>
<td align="center" style="140px;">
<asp:Label ID="lblClerk" runat="server" ></asp:Label></td>
</tr>
<tr>
<td rowspan="3">客服备注</td>
<td rowspan="3"> <asp:Label ID="lblClerkRemark" runat="server" ></asp:Label></td>
<td >顾客备注</td>
<td > <asp:Label ID="lblBuyerRemark" runat="server" ></asp:Label></td>
</tr>
<tr>
<td style="60px;">
售后电话</td>
<td align="center" style="120px;">
<asp:Label ID="lblSalesTel" runat="server" Text="137 6133 2393" ></asp:Label></td>
</tr>
<tr>
<td style="60px;">
售后服务</td>
<td align="center" style="120px;">
<asp:Label ID="lblSalesNet" runat="server" Text="www.shushome.com" ></asp:Label></td>
</tr>
</table>
</td>
</tr>
</table>
</form>
</body>
</html>
关键代码
document.all.WebBrowser.ExecWB(7,1);//其他的可以google
如果在IE6，IE7，IE8中不能调出打印的话可以尝试修改客户端的设置
这点很重要哟：
菜单->工具->Internet选项->安全->把internet和本地internet的自定义级别-> 把 “对未标记为安全执行脚本的ActiveX控件初始化...”设置为启用或者提示
为了提高安全性，微软把IE7，8的这个选项给设成禁用！所以手动设置重启下浏览器就可以用了，
