如何在打印前隐藏按钮并在printind过程完成后显示？ [英] How can I hide button before printing and show it when printind process has been completed?

问题描述

我有一个 id =print_req的打印按钮。我写了一些用于打印页面的Javascript代码，通过单击此按钮触发，我还想在打印前隐藏此按钮，并在整个打印过程后显示它。我的意思是不打印我打印文档中的按钮。这是我的代码：

I have a print button with id="print_req". I wrote some Javascript code for printing a page, which is triggered by clicking on this button, and I also want to hide this button before printing, and show it after whole printing process.i mean not to print button in my printed document. Here is my code:

$(document).ready(function(){
    $("#print_req").click(function(){
        $("#print_req").css("display","none");
        window.print();  
    });

    $("#print_req").css("display","block");
    return false;   
});

这正确地隐藏了该按钮，但是当打印过程完成时，该按钮将不再显示！有什么问题？

This correctly hide that button, but when the printing process get done, the button won't show again! What is the problem?

推荐答案

你错了。您不应该使用JavaScript或使用背景图像来显示和隐藏按钮。您应该使用打印样式表，以便在打印时为页面应用不同的样式。在您的情况下，您可以在此样式表中将显示设置为无[或隐藏的可见性]。

You are going at this wrong. You should not be showing and hiding the button with JavaScript or using a background image to do it. You should be using a print stylesheet that will allow you to apply different styles to the page when it is printed. In your case you would set the display to none [or visibility to hidden] in this stylesheet.

所以你添加一个带有印刷媒体类型的样式表

So you add a stylesheet with the media type for print

<link rel="stylesheet" type="text/css" media="print" href="print.css" />

在print.css中，隐藏按钮

In that print.css, you hide the button

.printButtonClass{ display : none }

presto，当你打印没有JavaScript时按钮隐藏。

And presto, the button hides when you print with no JavaScript.

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