web如何实现页面分页打印

2020-02-14 16:00:39来源：爱站网阅读 ()

实现页面分页打印是很多小伙伴们都想知道的，那么你知道web如何实现页面分页打印的具体方法吗？下面就让爱站小编带领大家一起去学习学习吧，希望本文对你有所帮助。

1．首先引入一个WebBrowser在需要打印的页面，可以直接添加：

<object id="WebBrowser" classid=CLSID:8856F961-340A-11D0-A96B-00C04FD705A2 height="0" width="0">

</object>

到页面，或者使用JavaScript在需要的时候临时添加也可以：

document.body.insertAdjacentHTML("beforeEnd",

"<object id=\"WebBrowser\" width=0 height=0 \

classid=\"clsid:8856F961-340A-11D0-A96B-00C04FD705A2\">");

2 .页面设置和打印预览
如下所示，直接调用即可

document.all.WebBrowser.ExecWB(6,6) 直接打印

document.all.WebBrowser.ExecWB(8,1) 页面设置

document.all.WebBrowser.ExecWB(7,1) 打印预览

或者：

execScript("document.all.WebBrowser.ExecWB 7, 1","VBScript");

3 隐藏不打印的页面元素和分页
CSS 有个Media 属性，可以分开设置打印和显示的格式。
如 <style media="print" type="text/css"> …</style> 中间的格式将只在打印时起作用，不会影响显示界面。
所以可以设定
<style media="print" type="text/css">
.Noprint{display:none;}
.PageNext{page-break-after: always;}
</style>
然后给不想打印的页面元素添加： class="Noprint" ，那就不会出现在打印和打印预览中了。
想分页的地方添加： <div class="PageNext"></div> 就可以了。
4．打印页面的特定部分
通过将需要打印的特定部分另建一个页面，然后装入主页面的一个IFrame中，再调用IFrame的打印方法，只打印IFrame中的内容实现的。
如：
<iframe style="visibility: visible" name="FrameId" width="100%" height="30%" src="NeedPrintedPage.asp"></iframe>
下面的pringFrame js函数将只打印Iframe中的内容，可以直接引用使用,如printFrame(FrameId);

window.print = printFrame;

// main stuff

function printFrame(frame, onfinish) {

if ( !frame ) frame = window;

function execOnFinish() {

switch ( typeof(onfinish) ) {

case "string": execScript(onfinish); break;

case "function": onfinish();

}

if ( focused && !focused.disabled ) focused.focus();

}

if (( frame.document.readyState !== "complete") &&( !frame.document.confirm("The document to print is not downloaded yet! Continue with printing?") ))

{

execOnFinish();

return;

}

var eventScope = printGetEventScope(frame);

var focused = document.activeElement;

window.printHelper = function() {

execScript("on error resume next: printWB.ExecWB 6, 1", "VBScript");

printFireEvent(frame, eventScope, "onafterprint");

printWB.outerHTML = "";

execOnFinish();

window.printHelper = null;

}

document.body.insertAdjacentHTML("beforeEnd",

"<object id=\"printWB\" width=0 height=0 \

classid=\"clsid:8856F961-340A-11D0-A96B-00C04FD705A2\">");

printFireEvent(frame, eventScope, "onbeforeprint");

frame.focus();

window.printHelper = printHelper;

setTimeout("window.printHelper()", 0);

}

// helpers

function printIsNativeSupport() {

var agent = window.navigator.userAgent;

var i = agent.indexOf("MSIE ")+5;

return parseInt(agent.substr(i)) >= 5 && agent.indexOf("5.0b1") < 0;

}

function printFireEvent(frame, obj, name) {

var handler = obj[name];

switch ( typeof(handler) ) {

case "string": frame.execScript(handler); break;

case "function": handler();

}

}

function printGetEventScope(frame) {

var frameset = frame.document.all.tags("FRAMESET");

if ( frameset.length ) return frameset[0];

return frame.document.body;

}

Iframe中所装载页面的打印效果在所装载页面设置就可以了，如分页等。

5．后台打印

通过建一个隐藏Iframe实现的，当然仍然会有页面装载的过程。

下面的函数创建Iframe装载页面并打印。如 printHidden(url) //url为页面地址

function printHidden(url) {

document.body.insertAdjacentHTML("beforeEnd",

"<iframe name=printHiddenFrame width=0 height=0></iframe>");

var doc = printHiddenFrame.document;

doc.open();

doc.write("<body onload=\"parent.onprintHiddenFrame()\">");

doc.write("<iframe name=printMe width=0 height=0 src=\"" +

url + "\"></iframe>");

doc.write("</body>");

doc.close();

}

function onprintHiddenFrame() {

function onfinish() {

printHiddenFrame.outerHTML = "";

if ( window.onprintcomplete ) window.onprintcomplete();

}

printFrame(printHiddenFrame.printMe, onfinish);

}

它用到了printFrame，所以别忘了引用前面的函数。

以下为demo:

<html>

<head>

<title>报表</title>

<object id="WebBrowser"

classid=CLSID:8856F961-340A-11D0-A96B-00C04FD705A2 height="0"

width="0">

</object>

<style media="print" type="text/css">

.Noprint{display:none;}

.PageNext{page-break-after: always;}

</style>

</head>

<body>

<div class="Noprint">

<input type="button" value="print"

onclick="document.all.WebBrowser.ExecWB(6,6)">

<input type="button" value="printset"

onclick="document.all.WebBrowser.ExecWB(8,1)">

<input type="button" value="view"

onclick="document.all.WebBrowser.ExecWB(7,1)">

<input type="button" value="frame"

onclick="printHidden(FrameId)">

</div>

<div class="PageNext">

1

</div>

<div class="PageNext">

2

</div>

<iframe style="visibility: visible" diplay="none"name="FrameId" width="100%"

height="30%" src="2.html"></iframe>

</body>

</html>

<script type="text/javascript">

window.print = printFrame;

// main stuff

function printFrame(frame, onfinish) {

if ( !frame ) frame = window;

function execOnFinish() {

switch ( typeof(onfinish) ) {

case "string": execScript(onfinish); break;

case "function": onfinish();

}

if ( focused && !focused.disabled ) focused.focus();

}

if (( frame.document.readyState !== "complete") &&( !frame.document.confirm("The document to print is not downloaded yet! Continue with printing?") ))

{

execOnFinish();

return;

}

var eventScope = printGetEventScope(frame);

var focused = document.activeElement;

window.printHelper = function() {

execScript("on error resume next: printWB.ExecWB 6, 1", "VBScript");

printFireEvent(frame, eventScope, "onafterprint");

printWB.outerHTML = "";

execOnFinish();

window.printHelper = null;

}

document.body.insertAdjacentHTML("beforeEnd",

"<object id=\"printWB\" width=0 height=0 \

classid=\"clsid:8856F961-340A-11D0-A96B-00C04FD705A2\">");

printFireEvent(frame, eventScope, "onbeforeprint");

frame.focus();

window.printHelper = printHelper;

setTimeout("window.printHelper()", 0);

}

// helpers

function printIsNativeSupport() {

var agent = window.navigator.userAgent;

var i = agent.indexOf("MSIE ")+5;

return parseInt(agent.substr(i)) >= 5 && agent.indexOf("5.0b1") < 0;

}

function printFireEvent(frame, obj, name) {

var handler = obj[name];

switch ( typeof(handler) ) {

case "string": frame.execScript(handler); break;

case "function": handler();

}

}

function printGetEventScope(frame) {

var frameset = frame.document.all.tags("FRAMESET");

if ( frameset.length ) return frameset[0];

return frame.document.body;

}

function printHidden(url) {

document.body.insertAdjacentHTML("beforeEnd",

"<iframe name=printHiddenFrame width=0 height=0></iframe>");

var doc = printHiddenFrame.document;

doc.open();

doc.write("<body onload=\"parent.onprintHiddenFrame()\">");

doc.write("<iframe name=printMe width=0 height=0 src=\"" +

url + "\"></iframe>");

doc.write("</body>");

doc.close();

}

function onprintHiddenFrame() {

function onfinish() {

printHiddenFrame.outerHTML = "";

if ( window.onprintcomplete ) window.onprintcomplete();

}

printFrame(printHiddenFrame.printMe, onfinish);

}

</script>