新建一个.aspx页面，在后台使用ClientScript.RegisterStartupScript(this.GetType(), "打印", "window.print();", true);，能够调出打印机，进行打印，我在IE8用调试脚本工具看了一下，打印工作好像是调用了ieframe.dll和preview.js才完成了
但我在下面的页面，不论是后台用ClientScript.RegisterStartupScript(this.GetType(), "打印", "window.print();", true);，还是在前台直接使用js打印，都不起作用，我在IE8用调试脚本工具看了一下，也没有执行ieframe.dll和preview.js，我觉得是因为没有执行ieframe.dll和preview.js导致不能打印，但我不知道原因是什么，下面贴出代码，供大家参考
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="sqb_all.aspx.cs" Inherits="njgzbt.ApplicationProcess.sqb_all" %>
<html>
<head runat="server">
<script type="text/javascript" language="javascript">
function doPrint() {
// PageSetup_Null();
// bdhtml = window.document.body.innerHTML;
// sprnstr = "<!--startprint-->";
// eprnstr = "<!--endprint-->";
// prnhtml = bdhtml.substring(bdhtml.indexOf(sprnstr) + 17);
// prnhtml = prnhtml.substring(0, prnhtml.indexOf(eprnstr));
// window.document.body.innerHTML = prnhtml;
window.print();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<table>
<tr>
<td align="right">
<div id="divBt" runat="server">
<asp:HiddenField ID="hidMess" runat="server" />
</div>
</td>
<td align="left">
<asp:DropDownList ID="DropDownList1" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"
AutoPostBack="true">
<asp:ListItem Value="0">全部</asp:ListItem>
<asp:ListItem Value="1">申请表</asp:ListItem>
<asp:ListItem Value="2">协议书</asp:ListItem>
<asp:ListItem Value="3">协议书附表</asp:ListItem>
</asp:DropDownList>
<asp:Button ID="btChaKanYiJian" runat="server" CssClass="buttonAllRight" Text="查看审批意见"
OnClientClick="return showMess();" />
<asp:Button ID="btnFanhui" runat="server" CssClass="buttonAllRight" Text="返回" OnClick="btnFanhui_Click" />
<asp:Button ID="btnPrint" Visible="false" CssClass="buttonAllRight" runat="server"
Text="打印" OnClientClick="javascript:doPrint();return false;" />
</td>
</tr>
</table>
<!--startprint-->
<div id="div1" runat="server" align="center">
<!--style="padding-left:100px;"-->
</div>
<!--endprint-->
<div id="div4" style="position: absolute; left: 650px; top: 100px; width: 486px;
height: 250px; z-index: 4; display: none;">
<img alt="图片" src=" " width="270" height="171" id="imge1" runat="server" />
</div>
<div id="div5" style="position: absolute; left: 650px; top: 500px; width: 486px;
height: 250px; z-index: 4; display: none;">
<img alt="图片" src=" " width="270" height="171" id="imge2" runat="server" /><img alt="图片"
src=" " width="270" height="171" id="imge3" runat="server" />
</div>
<div id="divyj" runat="server" style="position: absolute; width: 269px; height: 159px;
z-index: 3; left: 450px; top: 202px; background-color: #0066FF; layer-background-color: #0066FF;
border: 1px none #000000;" visible="false">
<table width="30%" border="0" style="background-color: #0066ff">
<tr>
<td height="25" colspan="3">
请输入原因：
</td>
</tr>
<tr>
<asp:HiddenField ID="hid1" runat="server" />
<td width="10%" height="91">
</td>
<td width="90%">
<asp:TextBox ID="txtyj" runat="server" Columns="30" Rows="6" TextMode="MultiLine"></asp:TextBox>
</td>
<td width="10%">
</td>
</tr>
<tr align="center">
<td height="35" colspan="3">
<asp:Button ID="btQuDing" runat="server" Text="确定" OnClientClick="return CheckYj();"
OnClick="btQuDing_Click" /> <asp:Button ID="btQuXiao" runat="server"
Text="取消" OnClientClick="return CloseDiv();" />
</td>
</tr>
</table>
</div>
<script type="text/javascript">
//<![CDATA[
javascript: doPrint(); window.print(); alert("helloworld"); //]]>
</script>
</form>
</body>
</html>
