Vue combat: implementation method of printing receipts

Vue can also print receipts? The following article will give you a detailed understanding of how to print receipts by installing the lodop printing control. This article is attached with detailed example code. I hope it will be helpful to you!

lodop printing control

Install lodop printing control

lodop地址: http://www.c-lodop.com/download.html

PutLodopFuncs. jsIntroduce the project

//==本JS是加载Lodop插件或Web打印服务CLodop/Lodop7的综合示例，可直接使用，建议理解后融入自己程序== //用双端口加载主JS文件Lodop.js(或CLodopfuncs.js兼容老版本)以防其中某端口被占: var MainJS = "CLodopfuncs.js", URL_WS1 = "ws://localhost:8000/" + MainJS, //ws用8000/18000 URL_WS2 = "ws://localhost:18000/" + MainJS, URL_HTTP1 = "http://localhost:8000/" + MainJS, //http用8000/18000 URL_HTTP2 = "http://localhost:18000/" + MainJS, URL_HTTP3 = "https://localhost.lodop.net:8443/" + MainJS; //https用8000/8443 var CreatedOKLodopObject, CLodopIsLocal, LoadJsState; //==判断是否需要CLodop(那些不支持插件的浏览器):== export function needCLodop() { try { var ua = navigator.userAgent; if (ua.match(/Windows\sPhone/i) || ua.match(/iPhone|iPod|iPad/i) || ua.match(/Android/i) || ua.match(/Edge\D?\d+/i)) return true; var verTrident = ua.match(/Trident\D?\d+/i); var verIE = ua.match(/MSIE\D?\d+/i); var verOPR = ua.match(/OPR\D?\d+/i); var verFF = ua.match(/Firefox\D?\d+/i); var x64 = ua.match(/x64/i); if ((!verTrident) && (!verIE) && (x64)) return true; else if (verFF) { verFF = verFF[0].match(/\d+/); if ((verFF[0] >= 41) || (x64)) return true; } else if (verOPR) { verOPR = verOPR[0].match(/\d+/); if (verOPR[0] >= 32) return true; } else if ((!verTrident) && (!verIE)) { var verChrome = ua.match(/Chrome\D?\d+/i); if (verChrome) { verChrome = verChrome[0].match(/\d+/); if (verChrome[0] >= 41) return true; } } return false; } catch (err) { return true; } } //==检查加载成功与否，如没成功则用http(s)再试== //==低版本CLODOP6.561/Lodop7.043及前)用本方法== export function checkOrTryHttp() { if (window.getCLodop) { LoadJsState = "complete"; return true; } if (LoadJsState == "loadingB" || LoadJsState == "complete") return; LoadJsState = "loadingB"; var head = document.head || document.getElementsByTagName("head")[0] || document.documentElement; var JS1 = document.createElement("script") , JS2 = document.createElement("script") , JS3 = document.createElement("script"); JS1.src = URL_HTTP1; JS2.src = URL_HTTP2; JS3.src = URL_HTTP3; JS1.onload = JS2.onload = JS3.onload = JS2.onerror = JS3.onerror = function () { LoadJsState = "complete"; } JS1.onerror = function (e) { if (window.location.protocol !== 'https:') head.insertBefore(JS2, head.firstChild); else head.insertBefore(JS3, head.firstChild); } head.insertBefore(JS1, head.firstChild); } //==加载Lodop对象的主过程:== (function loadCLodop() { if (!needCLodop()) return; CLodopIsLocal = !!((URL_WS1 + URL_WS2).match(/\/\/localho|\/\/127.0.0./i)); LoadJsState = "loadingA"; if (!window.WebSocket && window.MozWebSocket) window.WebSocket = window.MozWebSocket; //ws方式速度快(小于200ms)且可避免CORS错误,但要求Lodop版本足够新: try { var WSK1 = new WebSocket(URL_WS1); WSK1.onopen = function (e) { setTimeout("checkOrTryHttp();", 200); } WSK1.onmessage = function (e) { if (!window.getCLodop) eval(e.data); } WSK1.onerror = function (e) { var WSK2 = new WebSocket(URL_WS2); WSK2.onopen = function (e) { setTimeout("checkOrTryHttp();", 200); } WSK2.onmessage = function (e) { if (!window.getCLodop) eval(e.data); } WSK2.onerror = function (e) { checkOrTryHttp(); } } } catch (e) { checkOrTryHttp(); } })(); //==获取LODOP对象主过程,判断是否安装、需否升级:== export function getLodop(oOBJECT, oEMBED) { var strFontTag = "
打印控件"; var strLodopInstall = strFontTag + "未安装!点击这里执行安装"; var strLodopUpdate = strFontTag + "需要升级!点击这里执行升级"; var strLodop64Install = strFontTag + "未安装!点击这里执行安装"; var strLodop64Update = strFontTag + "需要升级!点击这里执行升级"; var strCLodopInstallA = "
Web打印服务CLodop未安装启动，点击这里下载执行安装"; var strCLodopInstallB = "
（若此前已安装过，可点这里直接再次启动）"; var strCLodopUpdate = "
Web打印服务CLodop需升级!点击这里执行升级"; var strLodop7FontTag = "
Web打印服务Lodop7"; var strLodop7HrefX86 = "点击这里下载安装(下载后解压，点击lodop文件开始执行)"; var strLodop7HrefARM = "点击这里下载安装(下载后解压，点击lodop文件开始执行)"; var strLodop7Install_X86 = strLodop7FontTag + "未安装启动，" + strLodop7HrefX86; var strLodop7Install_ARM = strLodop7FontTag + "未安装启动，" + strLodop7HrefARM; var strLodop7Update_X86 = strLodop7FontTag + "需升级，" + strLodop7HrefX86; var strLodop7Update_ARM = strLodop7FontTag + "需升级，" + strLodop7HrefARM; var strInstallOK = "，成功后请刷新本页面或重启浏览器。"; var LODOP; try { var isWinIE = (/MSIE/i.test(navigator.userAgent)) || (/Trident/i.test(navigator.userAgent)); var isWinIE64 = isWinIE && (/x64/i.test(navigator.userAgent)); var isLinuxX86 = (/Linux/i.test(navigator.platform)) && (/x86/i.test(navigator.platform)); var isLinuxARM = (/Linux/i.test(navigator.platform)) && (/aarch/i.test(navigator.platform)); if (needCLodop() || isLinuxX86 || isLinuxARM) { try { LODOP = window.getCLodop(); } catch (err) { } if (!LODOP && LoadJsState !== "complete") { if (!LoadJsState) alert("未曾加载Lodop主JS文件，请先调用loadCLodop过程."); else alert("网页还没下载完毕，请稍等一下再操作."); return; } var strAlertMessage; if (!LODOP) { if (isLinuxX86) strAlertMessage = strLodop7Install_X86; else if (isLinuxARM) strAlertMessage = strLodop7Install_ARM; else strAlertMessage = strCLodopInstallA + (CLodopIsLocal ? strCLodopInstallB : ""); document.body.innerHTML = strAlertMessage + strInstallOK + document.body.innerHTML; return; } else { if (isLinuxX86 && LODOP.CVERSION < "7.0.4.3") strAlertMessage = strLodop7Update_X86; else if (isLinuxARM && LODOP.CVERSION < "7.0.4.3") strAlertMessage = strLodop7Update_ARM; else if (CLODOP.CVERSION < "6.5.7.0") strAlertMessage = strCLodopUpdate; if (strAlertMessage) document.body.innerHTML = strAlertMessage + strInstallOK + document.body.innerHTML; } } else { //==如果页面有Lodop插件就直接使用,否则新建:== if (oOBJECT || oEMBED) { if (isWinIE) LODOP = oOBJECT; else LODOP = oEMBED; } else if (!CreatedOKLodopObject) { LODOP = document.createElement("object"); LODOP.setAttribute("width", 0); LODOP.setAttribute("height", 0); LODOP.setAttribute("style", "position:absolute;left:0px;top:-100px;width:0px;height:0px;"); if (isWinIE) LODOP.setAttribute("classid", "clsid:2105C259-1E0C-4534-8141-A753534CB4CA"); else LODOP.setAttribute("type", "application/x-print-lodop"); document.documentElement.appendChild(LODOP); CreatedOKLodopObject = LODOP; } else LODOP = CreatedOKLodopObject; //==Lodop插件未安装时提示下载地址:== if ((!LODOP) || (!LODOP.VERSION)) { document.body.innerHTML = (isWinIE64 ? strLodop64Install : strLodopInstall) + strInstallOK + document.body.innerHTML; return LODOP; } if (LODOP.VERSION < "6.2.2.6") { document.body.innerHTML = (isWinIE64 ? strLodop64Update : strLodopUpdate) + strInstallOK + document.body.innerHTML; } } //===如下空白位置适合调用统一功能(如注册语句、语言选择等):======================= //=============================================================================== return LODOP; } catch (err) { alert("getLodop出错:" + err); } }

myPreview1() { // this.CreateImage(); // this.LODOP.PRINT(); let LODOP = getLodop(); console.log(' LODOP', LODOP) var strHTML = document.getElementById("box").innerHTML; LODOP.PRINT_INIT("") LODOP.SET_LICENSES("", "EE0887D00FCC7D29375A695F728489A6", "C94CEE276DB2187AE6B65D56B3FC2848", ""); //去掉测试版本 // LODOP.SET_PRINT_PAGESIZE(3, "80mm", "10mm", "CreateCustomPage"); //80打印机不需要加这行 LODOP.SET_PRINT_STYLE("FontSize", 15); // 设置打印字体 LODOP.SET_PRINT_STYLE("Bold", 1); // 设置加粗 LODOP.SET_PRINT_MODE("PRINT_PAGE_PERCENT", "Height:90%"); LODOP.SET_PRINT_MODE("PRINT_PAGE_PERCENT", "Full-Width"); LODOP.ADD_PRINT_HTM(10, 10, "90%", "70%", strHTML); LODOP.PRINT();// // this.LODOP.PREVIEW() },