jQuery:检查字符串中是否存在特殊字符 [英] jQuery: Check if special characters exists in string
问题描述
我知道这个问题在Stack上经常被问到,但我似乎无法从已发布的问题中得到直接的答案。
I know this question is asked more often here on Stack, but I can't seem to get a straight answer out of the questions already posted.
我需要检查是否所有特殊字符(除了 - )都在一个字符串中,如果是,则给用户一个警告。
I need to check if all special characters (except -) are in a string, if so, then give the user an alert.
到目前为止我所拥有的是:
What I have so far is this:
if($('#Search').val().indexOf('@') == -1 || $('#Search').val().indexOf('#') == -1 || $('#Search').val().indexOf('$') == -1 || $('#Search').val().indexOf('%') == -1 || $('#Search').val().indexOf('^') == -1 || $('#Search').val().indexOf('&') == -1 || $('#Search').val().indexOf('*') == -1 || $('#Search').val().indexOf('(') == -1 || $('#Search').val().indexOf(')') == -1 || $('#Search').val().indexOf('_') == -1 || $('#Search').val().indexOf('\'') == -1 || $('#Search').val().indexOf('\"') == -1 || $('#Search').val().indexOf('\\') == -1 || $('#Search').val().indexOf('|') == -1 || $('#Search').val().indexOf('?') == -1 || $('#Search').val().indexOf('/') == -1 || $('#Search').val().indexOf(':') == -1 || $('#Search').val().indexOf(';') == -1 || $('#Search').val().indexOf('!') == -1 || $('#Search').val().indexOf('~') == -1 || $('#Search').val().indexOf('`') == -1 || $('#Search').val().indexOf(',') == -1 || $('#Search').val().indexOf('.') == -1 || $('#Search').val().indexOf('<') == -1 || $('#Search').val().indexOf('>') == -1 || $('#Search').val().indexOf('{') == -1 || $('#Search').val().indexOf('}') == -1 || $('#Search').val().indexOf('[') == -1 || $('#Search').val().indexOf(']') == -1 || $('#Search').val().indexOf('+') == -1 || $('#Search').val().indexOf('=') == -1)
{
// Code that needs to execute when none of the above is in the string
}
else
{
alert('Your search string contains illegal characters.');
}
但这似乎不起作用...任何人都可以帮助我这件事?
But this doesn't seem to work... Can anyone help me on this matter?
提前致谢!
Guido
推荐答案
如果你真的想检查所有这些特殊字符,那么使用正则表达式会更容易:
If you really want to check for all those special characters, it's easier to use a regular expression:
var str = $('#Search').val();
if(/^[a-zA-Z0-9- ]*$/.test(str) == false) {
alert('Your search string contains illegal characters.');
}
上述内容仅允许字符串完全由字符组成 az
, AZ
, 0-9
,加上连字符空格字符。包含任何其他字符的字符串将导致警报
。
The above will only allow strings consisting entirely of characters on the ranges a-z
, A-Z
, 0-9
, plus the hyphen an space characters. A string containing any other character will cause the alert
.
这篇关于jQuery:检查字符串中是否存在特殊字符的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!