如何解决ASP.net Core 中的 jQuery PrintThis 颜色不可见
我对 ASP.net Core 中的 jQuery PrintThis 插件有疑问。
我用summernote的格式创建了一个html字符串，例如一个带有黄色字体颜色的表格。如果我用 jQuery 插件打印这个，每件事都显示正确，但颜色不显示。颜色还是黑色。
有人可以帮我吗？
先谢谢你 奇尼
更新： 这是我的代码： 我从 PrintThis 插件调用函数和 css 的 Index.cshtml。
/*
* printThis v1.15.1
* @desc Printing plug-in for jQuery
* @author Jason Day
*
* Resources (based on):
* - jPrintArea: http://plugins.jquery.com/project/jPrintArea
* - jqPrint: https://github.com/permanenttourist/jquery.jqprint
* - Ben Nadal: http://www.bennadel.com/blog/1591-Ask-Ben-Print-Part-Of-A-Web-Page-With-jQuery.htm
*
* Licensed under the MIT licence:
* http://www.opensource.org/licenses/mit-license.PHP
*
* (c) Jason Day 2015-2019
*
* Usage:
*
* $("#mySelector").printThis({
* debug: false,// show the iframe for debugging
* importCSS: true,// import parent page css
* importStyle: false,// import style tags
* printContainer: true,// grab outer container as well as the contents of the selector
* loadCSS: "path/to/my.css",// path to additional css file - use an array [] for multiple
* pageTitle: "",// add title to print page
* removeInline: false,// remove all inline styles from print elements
* removeInlineselector: "body *",// custom selectors to filter inline styles. removeInline must be true
* printDelay: 333,// variable print delay
* header: null,// prefix to html
* footer: null,// postfix to html
* base: false,// preserve the BASE tag,or accept a string for the URL
* formValues: true,// preserve input/form values
* canvas: false,// copy canvas elements
* doctypestring: '...',// enter a different doctype for older markup
* removeScripts: false,// remove script tags from print content
* copyTagClasses: false // copy classes from the html & body tag
* beforePrintEvent: null,// callback function for printEvent in iframe
* beforePrint: null,// function called before iframe is filled
* afterPrint: null // function called before iframe is removed
* });
*
* Notes:
* - the loadCSS will load additional CSS (with or without @media print) into the iframe,adjusting layout
*/
;
(function($) {
function appendContent($el,content) {
if (!content) return;
// Simple test for a jQuery element
$el.append(content.jquery ? content.clone() : content);
}
function appendBody($body,$element,opt) {
// Clone for safety and convenience
// Calls clone(withDataAndEvents = true) to copy form values.
var $content = $element.clone(opt.formValues);
if (opt.formValues) {
// copy original select and textarea values to their cloned counterpart
// Makes up for inability to clone select and textarea values with clone(true)
copyValues($element,$content,'select,textarea');
}
if (opt.removeScripts) {
$content.find('script').remove();
}
if (opt.printContainer) {
// grab $.selector as container
$content.appendTo($body);
} else {
// otherwise just print interior elements of container
$content.each(function() {
$(this).children().appendTo($body)
});
}
}
// copies values from origin to clone for passed in elementSelector
function copyValues(origin,clone,elementSelector) {
var $originalElements = origin.find(elementSelector);
clone.find(elementSelector).each(function(index,item) {
$(item).val($originalElements.eq(index).val());
});
}
var opt;
$.fn.printThis = function(options) {
opt = $.extend({},$.fn.printThis.defaults,options);
var $element = this instanceof jQuery ? this : $(this);
var strFrameName = "printThis-" + (new Date()).getTime();
if (window.location.hostname !== document.domain && navigator.userAgent.match(/msie/i)) {
// Ugly IE hacks due to IE not inheriting document.domain from parent
// checks if document.domain is set by comparing the host name against document.domain
var iframeSrc = "javascript:document.write(\"<head><script>document.domain=\\\"" + document.domain + "\\\";</s" + "cript></head><body></body>\")";
var printI = document.createElement('iframe');
printI.name = "printIframe";
printI.id = strFrameName;
printI.className = "MSIE";
document.body.appendChild(printI);
printI.src = iframeSrc;
} else {
// other browsers inherit document.domain,and IE works if document.domain is not explicitly set
var $frame = $("<iframe id='" + strFrameName + "' name='printIframe' />");
$frame.appendTo("body");
}
var $iframe = $("#" + strFrameName);
// show frame if in debug mode
if (!opt.debug) $iframe.css({
position: "absolute",width: "0px",height: "0px",left: "-600px",top: "-600px"
});
// before print callback
if (typeof opt.beforePrint === "function") {
opt.beforePrint();
}
// $iframe.ready() and $iframe.load were inconsistent between browsers
setTimeout(function() {
// Add doctype to fix the style difference between printing and render
function setDocType($iframe,doctype){
var win,doc;
win = $iframe.get(0);
win = win.contentwindow || win.contentDocument || win;
doc = win.document || win.contentDocument || win;
doc.open();
doc.write(doctype);
doc.close();
}
if (opt.doctypestring){
setDocType($iframe,opt.doctypestring);
}
var $doc = $iframe.contents(),$head = $doc.find("head"),$body = $doc.find("body"),$base = $('base'),baseURL;
// add base tag to ensure elements use the parent domain
if (opt.base === true && $base.length > 0) {
// take the base tag from the original page
baseURL = $base.attr('href');
} else if (typeof opt.base === 'string') {
// An exact base string is provided
baseURL = opt.base;
} else {
// Use the page URL as the base
baseURL = document.location.protocol + '//' + document.location.host;
}
$head.append('<base href="' + baseURL + '">');
// import page stylesheets
if (opt.importCSS) $("link[rel=stylesheet]").each(function() {
var href = $(this).attr("href");
if (href) {
var media = $(this).attr("media") || "all";
$head.append("<link type='text/css' rel='stylesheet' href='" + href + "' media='" + media + "'>");
}
});
// import style tags
if (opt.importStyle) $("style").each(function() {
$head.append(this.outerHTML);
});
// add title of the page
if (opt.pageTitle) $head.append("<title>" + opt.pageTitle + "</title>");
// import additional stylesheet(s)
if (opt.loadCSS) {
if ($.isArray(opt.loadCSS)) {
jQuery.each(opt.loadCSS,function(index,value) {
$head.append("<link type='text/css' rel='stylesheet' href='" + this + "'>");
});
} else {
$head.append("<link type='text/css' rel='stylesheet' href='" + opt.loadCSS + "'>");
}
}
var pageHtml = $('html')[0];
// CSS VAR in html tag when dynamic apply e.g. document.documentElement.style.setProperty("--foo",bar);
$doc.find('html').prop('style',pageHtml.style.csstext);
// copy 'root' tag classes
var tag = opt.copyTagClasses;
if (tag) {
tag = tag === true ? 'bh' : tag;
if (tag.indexOf('b') !== -1) {
$body.addClass($('body')[0].className);
}
if (tag.indexOf('h') !== -1) {
$doc.find('html').addClass(pageHtml.className);
}
}
// print header
appendContent($body,opt.header);
if (opt.canvas) {
// add canvas data-ids for easy access after cloning.
var canvasId = 0;
// .addBack('canvas') adds the top-level element if it is a canvas.
$element.find('canvas').addBack('canvas').each(function(){
$(this).attr('data-printthis',canvasId++);
});
}
appendBody($body,opt);
if (opt.canvas) {
// Re-draw new canvases by referencing the originals
$body.find('canvas').each(function(){
var cid = $(this).data('printthis'),$src = $('[data-printthis="' + cid + '"]');
this.getContext('2d').drawImage($src[0],0);
// Remove the markup from the original
if ($.isFunction($.fn.removeAttr)) {
$src.removeAttr('data-printthis');
} else {
$.each($src,function(i,el) {
el.removeAttribute('data-printthis');
});
}
});
}
// remove inline styles
if (opt.removeInline) {
// Ensure there is a selector,even if it's been mistakenly removed
var selector = opt.removeInlineselector || '*';
// $.removeAttr available jQuery 1.7+
if ($.isFunction($.removeAttr)) {
$body.find(selector).removeAttr("style");
} else {
$body.find(selector).attr("style","");
}
}
// print "footer"
appendContent($body,opt.footer);
// attach event handler function to beforePrint event
function attachOnBeforePrintEvent($iframe,beforePrintHandler) {
var win = $iframe.get(0);
win = win.contentwindow || win.contentDocument || win;
if (typeof beforePrintHandler === "function") {
if ('matchMedia' in win) {
win.matchMedia('print').addListener(function(mql) {
if(mql.matches) beforePrintHandler();
});
} else {
win.onbeforeprint = beforePrintHandler;
}
}
}
attachOnBeforePrintEvent($iframe,opt.beforePrintEvent);
setTimeout(function() {
if ($iframe.hasClass("MSIE")) {
// check if the iframe was created with the ugly hack
// and perform another ugly hack out of neccessity
window.frames["printIframe"].focus();
$head.append("<script> window.print(); </s" + "cript>");
} else {
// proper method
if (document.queryCommandSupported("print")) {
$iframe[0].contentwindow.document.execCommand("print",false,null);
} else {
$iframe[0].contentwindow.focus();
$iframe[0].contentwindow.print();
}
}
// remove iframe after print
if (!opt.debug) {
setTimeout(function() {
$iframe.remove();
},1000);
}
// after print callback
if (typeof opt.afterPrint === "function") {
opt.afterPrint();
}
},opt.printDelay);
},333);
};
// defaults
$.fn.printThis.defaults = {
debug: false,// show the iframe for debugging
importCSS: true,// import parent page css
importStyle: false,// import style tags
printContainer: true,// print outer container/$.selector
loadCSS: "",// path to additional css file - use an array [] for multiple
pageTitle: "",// add title to print page
removeInline: false,// remove inline styles from print elements
removeInlineselector: "*",// custom selectors to filter inline styles. removeInline must be true
printDelay: 333,// variable print delay
header: null,// prefix to html
footer: null,// postfix to html
base: false,// preserve the BASE tag or accept a string for the URL
formValues: true,// preserve input/form values
canvas: false,// copy canvas content
doctypestring: '<!DOCTYPE html>',// enter a different doctype for older markup
removeScripts: false,// remove script tags from print content
copyTagClasses: false,// copy classes from the html & body tag
beforePrintEvent: null,// callback function for printEvent in iframe
beforePrint: null,// function called before iframe is filled
afterPrint: null // function called before iframe is removed
};
})(jQuery); @{
ViewData["Title"] = "Index";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<h1>Index</h1>
<div class="container">
Your Content
<p><font color="#ff0000">Hello World</font></p><p><span style="background-color: rgb(255,0);">Hello World</span></p>
</div>
<button id="print"> Print this </button>
<script src="~/lib/jquery/dist/jquery.min.js"></script>
<script src="~/lib/printThis/printThis.js"></script>
<script>
$(document).ready(function () {
$('#print').on("click",function () {
$('.container').printThis({
importCSS: true,importStyle: true,removeInline: false});
})
})
</script>解决方法
请检查您的代码，尝试将 importCSS 和 importStyle 设置为 true。
$('#advanced').on("click",function () {
$('#table2print').printThis({
importCSS: true,importStyle: true,removeInline: false
});
});
另外，您使用哪种浏览器打印表格？也许问题与浏览器设置有关。例如，如果使用谷歌浏览器打印表格，打印页面中有一个颜色选择器，记得选择颜色选项。
此外，如果仍然无法正常工作，您能否像 Minimal,Complete,and Verifiable example 一样发布足够的代码来重现问题。
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