JS implements browser printing and print preview
目前正在做浏览器端采用JS方式实现打印这么一个功能,JS打印实现的方法很多,但是兼容各个浏览器实现打印预览的功能有些棘手,现将实现的内容及遇到的问题记录下来,希望有大牛看到所提的问题后可以给予解答,在此感谢啦。
1.JS实现打印的方式
方式一:window.print()
window.print();会弹出打印对话框,打印的是window.document.body.innerHTML中的内容,下面是从网上摘到的一个局部打印的例子,该例子的不足是打印会修改页面的内容。
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>局部打印案例</title> <script type="text/javascript"> function doPrint() { bdhtml=window.document.body.innerHTML; sprnstr="<!--startprint-->"; eprnstr="<!--endprint-->"; prnhtml=bdhtml.substr(bdhtml.indexOf(sprnstr)+17); prnhtml=prnhtml.substring(0,prnhtml.indexOf(eprnstr)); window.document.body.innerHTML=prnhtml; window.print(); } </script> </head> <body> <p>1不需要打印的地方</p> <p>2这里不要打印啊</p> <!--startprint--><!--注意要加上html里star和end的这两个标记--> <h1>打印标题</h1> <p>打印内容~~</p> <!--endprint--> <button type="button" onclick="doPrint()">打印</button> <p>不打印的地方啊哈哈哈哈</p> <p>2</p> </body> </html>
方式二:使用html 标签
这种方式是其只兼容IE,其他浏览器不可使用,同时IE10以下的浏览器才可以使用,调用方式如下:
<body> <object id="WebBrowser" classid=CLSID:8856F961-340A-11D0-A96B-00C04FD705A2 height="0" width="0"> </object> </body> <script> WebBrowser.ExecWB(1,1) //打开 WebBrowser.ExecWB(2,1) //关闭现在所有的IE窗口,并打开一个新窗口 WebBrowser.ExecWB(4,1) //保存网页 //--------------- 常用 --------------- WebBrowser.ExecWB(6,1) //打印 WebBrowser.ExecWB(7,1) //打印预览 WebBrowser.ExecWB(8,1) //打印页面设置 //------------------------------------- WebBrowser.ExecWB(10,1) //查看页面属性 WebBrowser.ExecWB(15,1) //撤销 WebBrowser.ExecWB(17,1) //全选 WebBrowser.ExecWB(22,1) //刷新 WebBrowser.ExecWB(45,1) //关闭窗体无提示 </script>
这种方式优势是在IE下可以弹出打印预览,这是打印很人性化的功能,但是遗憾的是高版本的IE浏览器不支持WebBrowser了
方式三:采用document.execCommand(”print”)
该方式也兼容各个版本的浏览器,同window.print()一样,其启动的是打印对话框,chrome的打印对话框自带预览功能,但是IE、火狐仅仅只弹出打印设置对话框,没有预览功能。
方式四:采用JQuery插件
使用JQuery浏览插件可以很方便的进行局部打印,常用的插件有:
1)jquery.print.js 下载地址:https://github.com/DoersGuild/jQuery.print
2)jquery.print-preview.js 下载地址:https://github.com/etimbo/jquery-print-preview-plugin
这两种方式使用都很简单,1)通过$("#id").print(/*options*/);调用;2)通过$('#id').printArea(/*options*/); 其中的option可选项可以在下载地址下载下来后看示例代码,一般options不用传即可,示例代码如下:
<html> <head> <meta http-equiv=Content-Type content="text/html; charset=utf-8"> <title>JQuery打印</title> <script type="text/javascript" src="./js/jquery-3.1.1.min.js"></script> <script language="javascript" src="./js/jquery.print.js"></script> </head> <body style='margin:0 auto;text-align:center;'> <button id='button_print' name='button_print' onclick="javascript:printit()>打印</button> <p id='ganburenmianbaio' class=WordSection1 style='width:750px;margin:0 auto;text-align:center;vertical-align: middle;'> </p> </body> <script language="javascript"> function printit(){ $("#ganburenmianbaio").print({iframe:true,prepend:'<br/>'}); } </script> </html>
方式五:采用浏览器打印第三方插件
该方式需要用户浏览器安装相关的第三方插件,用户体验不好,故在此不细述了。
2.打印预览
chrome浏览器、win10自带的IE浏览器 调用打印弹出的打印设置界面中包含打印预览部分,故其通过上面的打印函数的调用即可实现。
IE9以后的版本、火狐不支持webbrowser控件了,JS调用不了浏览器的打印预览的功能,我们只能用iframe模拟打印预览的对话框,将需要打印的内容显示在该对话框中,然后在调用打印的功能实现打印。
1)jquery打印预览插件
jquery.print-preview.js 下载地址:https://github.com/etimbo/jquery-print-preview-plugin
其实现的效果如下图(其自动的示例代码)
2)webbrowser控件打印预览
IE8及以下版本可以调用WebBrowser.ExecWB(7,1) 函数弹出浏览器的打印预览对话框,采用该函数的好处是 用户可以在打印预览对话框中 调整页边距、页眉、页脚;
下面贴出的是设置页边距、页眉、页脚的JS代码
//取得页面打印设置的原参数数据 function PageSetup_temp(){ try { var Wsh=new ActiveXObject("WScript.Shell"); HKEY_Key="header"; //取得页眉默认值 head = Wsh.RegRead(HKEY_Root+HKEY_Path+HKEY_Key); HKEY_Key="footer"; //取得页脚默认值 foot = Wsh.RegRead(HKEY_Root+HKEY_Path+HKEY_Key); HKEY_Key="margin_bottom"; //取得下页边距 bottom = Wsh.RegRead(HKEY_Root+HKEY_Path+HKEY_Key); HKEY_Key="margin_left"; //取得左页边距 left = Wsh.RegRead(HKEY_Root+HKEY_Path+HKEY_Key); HKEY_Key="margin_right"; //取得右页边距 right = Wsh.RegRead(HKEY_Root+HKEY_Path+HKEY_Key); HKEY_Key="margin_top"; //取得上页边距 top = Wsh.RegRead(HKEY_Root+HKEY_Path+HKEY_Key); } catch(e){ //alert("不允许ActiveX控件"); } } //设置网页打印的页眉页脚和页边距,注册表里的单位是英寸,打印设置中是毫米,1英寸=25.4毫米 function PageSetup_Null(){ try { var Wsh=new ActiveXObject("WScript.Shell"); HKEY_Key="header"; //设置页眉(为空) Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,""); HKEY_Key="footer"; //设置页脚(为空) Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,""); HKEY_Key="margin_bottom"; //设置下页边距(0) Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"0.6"); HKEY_Key="margin_left"; //设置左页边距(0) Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"0.3"); HKEY_Key="margin_right"; //设置右页边距(0) Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"0.3"); HKEY_Key="margin_top"; //设置上页边距(8) Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"0.6"); } catch(e){ //alert("不允许ActiveX控件"); } } //设置网页打印的页眉页脚和页边距为默认值 function PageSetup_Default(){ try { var Wsh=new ActiveXObject("WScript.Shell"); HKEY_Key="header"; HKEY_Key="header"; //还原页眉 Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,head); HKEY_Key="footer"; //还原页脚 Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,foot); HKEY_Key="margin_bottom"; //还原下页边距 Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,bottom); HKEY_Key="margin_left"; //还原左页边距 Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,left); HKEY_Key="margin_right"; //还原右页边距 Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,right); HKEY_Key="margin_top"; //还原上页边距 Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,top); } catch(e){ //alert("不允许ActiveX控件"); } }
使用该函数,会弹出
通过网页修改activex安全设置,添加信任站点,禁用该弹出窗口提示,代码如下:
function activeXControl(){ try{ var WshShell=new ActiveXObject("WScript.Shell"); //添加信任站点(http://127.0.0.1) WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\ZoneMap\\Ranges\\Range100\\",""); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\ZoneMap\\Ranges\\Range100\\:Range","127.0.0.1"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\ZoneMap\\Ranges\\Range100\\http","2","REG_DWORD"); //修改IE ActiveX安全设置: 1本地Intranet区域 WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\1\\1001","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\1\\1004","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\1\\1200","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\1\\1201","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\1\\1405","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\1\\2201","0","REG_DWORD"); //修改IE ActiveX安全设置:2受信任的站点区域 WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\2\\1001","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\2\\1004","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\2\\1200","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\2\\1201","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\2\\1405","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\2\\2201","0","REG_DWORD"); //修改IE ActiveX安全设置:3Internet区域 WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\3\\1001","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\3\\1004","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\3\\1200","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\3\\1201","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\3\\1405","0","REG_DWORD"); WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\Zones\\3\\2201","0","REG_DWORD"); //禁用Winxp弹出窗口阻止程序 WshShell.RegWrite("HKEY_CURRENT_USER\\Software\\Microsoft\\Internet Explorer\\New Windows\\PopupMgr","no"); }catch(e){ //alert("不允许ActiveX控件"); } }
3.问题
1)网页修改activex安全设置该段代码也是必须在启用ActiveX的条件下调用成功,是需要用户在Internet的配置项中设置的(如下图),如何才能自动启用该插件?
2) chrome、火狐如何通过JS设置页边距、页眉、页脚?
3) IE高版本浏览器、火狐如何通过JS弹出浏览器自己的打印预览?
本文讲解了JS实现浏览器打印、打印预览 ,更多相关内容请关注php中文网。
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