web 頁面分頁列印的實現
阿新 • • 發佈:2019-02-02
1.首先引入一個WebBrowser在需要列印的頁面,可以直接新增:
程式碼如下:
<object id="WebBrowser" classid=CLSID:8856F961-340A-11D0-A96B-00C04FD705A2 height="0" width="0">
</object>
到頁面,或者使用JavaScript在需要的時候臨時新增也可以:
程式碼如下:
document.body.insertAdjacentHTML("beforeEnd", "<object id=\"WebBrowser\" width=0 height=0 \ classid=\"clsid:8856F961-340A-11D0-A96B-00C04FD705A2\">");
2 .頁面設定和列印預覽
如下所示,直接呼叫即可
程式碼如下:
document.all.WebBrowser.ExecWB(6,6) 直接列印
document.all.WebBrowser.ExecWB(8,1) 頁面設定
document.all.WebBrowser.ExecWB(7,1) 列印預覽
或者:
程式碼如下:
execScript("document.all.WebBrowser.ExecWB 7, 1","VBScript");
3 隱藏不列印的頁面元素和分頁
CSS 有個Media 屬性,可以分開設定列印和顯示的格式。
如 <style media="print" type="text/css"> …</style> 中間的格式將只在列印時起作用,不會影響顯示介面。
所以可以設定
<style media="print" type="text/css">
.Noprint{display:none;}
.PageNext{page-break-after: always;}
</style>
然後給不想列印的頁面元素新增: class="Noprint" ,那就不會出現在列印和列印預覽中了。
想分頁的地方新增: <div class="PageNext"></div> 就可以了。
4.列印頁面的特定部分
通過將需要列印的特定部分另建一個頁面,然後裝入主頁面的一個IFrame中,再呼叫IFrame的列印方法,只打印IFrame中的內容實現的。
如:
<iframe style="visibility: visible" name="FrameId" width="100%" height="30%" src="NeedPrintedPage.asp"></iframe>
下面的pringFrame js函式將只打印Iframe中的內容,可以直接引用使用,如printFrame(FrameId);
程式碼如下:
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中所裝載頁面的列印效果在所裝載頁面設定就可以了,如分頁等。 5.後臺列印 通過建一個隱藏Iframe實現的,當然仍然會有頁面裝載的過程。 下面的函式建立Iframe裝載頁面並列印。如 printHidden(url) //url為頁面地址 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,所以別忘了引用前面的函式。 以下為demo: <html> <head> <title>報表</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>