使用JQuery从文本框中删除不需要的字符

本文介绍了使用JQuery从文本框中删除不需要的字符的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想得到的一些信息是如何使用JQuery从文本框（或textarea）中删除某些字符。我有C＃中的代码，但我似乎无法将其转换为JQuery javascript。我的问题是我不知道如何从文本框中获取值作为字符数组，然后我可以循环并与给定的一组不需要的字符进行比较。 这就是我在JQuery中的远：

What I would like to get some input on is how to remove certain characters from a textbox (or textarea) with JQuery. I have the code in C# but I can´t seem to translate that to JQuery javascript. My problem is that I don´t know how to get the value from a textbox as a character array which I then can loop through and compare against a given set of unwanted characters. This is how "far" I have come in JQuery:

$("input[type=text], textarea").change(function() { // code here });

这是我在C＃中的代码：

This is my code in C#:

for (int i = 0; i < charArray.Length; i++) { current = charArray[i]; if ((current == 0x9) || (current == 0xA) || (current == 0xD) || ((current >= 0x20) && (current <= 0xD7FF)) || ((current >= 0xE000) && (current <= 0xFFFD))) _validXML.Append(current); } return _validXML.ToString().TrimEnd((char)32, (char)160) ;

更新：

我在下面给出了一些答案的组合（我将赞成它们），我的最终JQuery看起来像这样并起作用：

I went with a combination of some answers below (I will upvote them) and my final JQuery looks like this and works:

$(document).ready(function() { $(":text, textarea").change(function() { var text = ""; var arr = $(this).val() $.each(arr, function(i) { var c = arr.charCodeAt(i); if ((c == 0x9) || (c == 0xA) || (c == 0xD) || (c >= 0x20 && c <= 0xD7FF) || (c >= 0xE000 && c <= 0xFFFD)) { text += arr.charAt(i); } }); $(this).val(text); }); });

全部谢谢！

推荐答案

Textarea：

<textarea id="item" name="item" rows="5" cols="80">Some text in here</textarea>

jQuery代码：

var text = $('#item').val(); var newtext = ""; for (var i = 0; i < text.length; i++) { var c = text.charCodeAt(i); if ((c == 0x9) || (c == 0xA) || (c == 0xD) || (c >= 0x20 && c <= 0xD7FF) || (c >= 0xE000 && c <= 0xFFFD)) { newtext += c; } } $('#item').val(newtext);

除了访问文本数据并设置它之外，这实际上与jQuery很少有关系。再次。

This has actually very little to do with jQuery, methinks, except to access the text data and set it again.