jQuery AlphaNumericPlugin - 复制粘贴问题

发布于 2024-07-15 10:42:23 字数 708 浏览 5 评论 0原文

我正在使用 jQuery 的 .alphanumeric 插件，当用户直接在文本框中键入内容时，它肯定会实现我所期望的功能。但是，如果用户将值复制并粘贴到文本框中，则一切都将失败。

$("#<%= txtNumber.ClientID %>").alphanumeric({allow:"-"});

我当然可以这样做：

$(document).ready(function() {
    $("#<%= txtNumber.ClientID %>").blur(function() {
        $("#<%= txtNumber.ClientID %>").val(
            RemoveInvalidCharacters(
                $("#<%= txtNumber.ClientID %>").val()
            )
        );
    });
});

//FUNCTION REMOVES ANY ; IN TEXT TO PREVENT SQL INJECTION
function RemoveInvalidCharacters(text) {
     return text.replace(';', '');
}

但是...我不想用 .blur() 函数进一步整理我的代码。还有其他方法可以解决这个问题吗？

原文

I am using the .alphanumeric plugin for jQuery which is certainly doing what I would expect as users type directly into the textbox. But, if a user were to copy and paste a value into the text box, all bets are off.

$("#<%= txtNumber.ClientID %>").alphanumeric({allow:"-"});

I can certainly do this:

$(document).ready(function() {
    $("#<%= txtNumber.ClientID %>").blur(function() {
        $("#<%= txtNumber.ClientID %>").val(
            RemoveInvalidCharacters(
                $("#<%= txtNumber.ClientID %>").val()
            )
        );
    });
});

//FUNCTION REMOVES ANY ; IN TEXT TO PREVENT SQL INJECTION
function RemoveInvalidCharacters(text) {
     return text.replace(';', '');
}

But... I'd rather not have to kluge up my code even further with .blur() functions. Are there any other ways around this?

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太傻旳人生 2024-07-22 10:42:23

处理粘贴事件相当简单。我在我的屏蔽输入插件中使用了这种技术，效果良好。请随意浏览源代码以查看它的使用情况。

这是针对上面的示例修改的相关位。

var pasteEventName = $.browser.msie ? 'paste' : 'input';
$("#<%= txtNumber.ClientID %>").bind(pasteEventName, function() {
   setTimeout(function() { 
      RemoveInvalidCharacters(
         $("#<%= txtNumber.ClientID %>").val()
      ); 
   }, 0);
});

Handling the paste event is fairly straightforward. I'm using this technique in my masked input plugin with good results. Feel free to browse the source to see it in use.

Here is the relevant bits modified for your example above.

var pasteEventName = $.browser.msie ? 'paste' : 'input';
$("#<%= txtNumber.ClientID %>").bind(pasteEventName, function() {
   setTimeout(function() { 
      RemoveInvalidCharacters(
         $("#<%= txtNumber.ClientID %>").val()
      ); 
   }, 0);
});

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说谎友 2024-07-22 10:42:23

我在这里找到了这个解决方案：
http://www.devcurry.com/2009/ 10/allow-only-alphanumeric-characters-in.html

<script type="text/javascript">
$(function() {
 $('input.alpha').keyup(function() {
  if (this.value.match(/[^a-zA-Z0-9 ]/g)) {
   this.value = this.value.replace(/[^a-zA-Z0-9 ]/g, '');
  }
 });
});
</script>

<input type="text" name="test" value="" class="alpha">

I found this solution here:
http://www.devcurry.com/2009/10/allow-only-alphanumeric-characters-in.html

<script type="text/javascript">
$(function() {
 $('input.alpha').keyup(function() {
  if (this.value.match(/[^a-zA-Z0-9 ]/g)) {
   this.value = this.value.replace(/[^a-zA-Z0-9 ]/g, '');
  }
 });
});
</script>

<input type="text" name="test" value="" class="alpha">

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╄→承喏 2024-07-22 10:42:23

我也需要解决粘贴问题，并且我找到了对我有用的东西。人们仍然可以使用“编辑”> 在浏览器菜单中粘贴，但可以使用 Ctrl-V 以及右键单击粘贴。在 FF、IE、Opera、Safari、Chrome 中测试：

<!DOCTYPE html>
<html>
<head>
    <title>Only Allow Certain Characters</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
</head>
<body>
    <br>
    <form id="myform" action="">
        <input id="element1" name="mytext1" type="text">
        <input id="element2" name="mytext2" type="text">
    </form>
<script>
    /* removes evil chars while typing */
    (function($){
        $.fn.disableChars = function(a) {

            a = $.extend({
                allow: ''
            }, a);

            b = a.allow.split('');
            for ( i=0; i<b.length; i++) b[i] = "\\" + b[i];
            a.allow = b.join('');

            var regex = new RegExp('[^a-z0-9' + a.allow + ']', 'ig');

            $(this)
            .bind('keyup blur', function() {
                if (this.value.search(regex) != '-1') {
                    this.value = this.value.replace(regex, '');
                }
            })
            .bind('contextmenu',function () {return false});

        }
    })(jQuery);

    $("#element1").disableChars();
    $("#element2").disableChars({allow:".,:-() "});
</script>
</body>
</html>

I too was needing a solution to the paste problem, and I figured out something that will work for me. A person can still use the Edit > Paste in the browsers menu, but Ctrl-V, as well as right click paste is handled. Tested in FF,IE,Opera,Safari,Chrome:

<!DOCTYPE html>
<html>
<head>
    <title>Only Allow Certain Characters</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
</head>
<body>
    <br>
    <form id="myform" action="">
        <input id="element1" name="mytext1" type="text">
        <input id="element2" name="mytext2" type="text">
    </form>
<script>
    /* removes evil chars while typing */
    (function($){
        $.fn.disableChars = function(a) {

            a = $.extend({
                allow: ''
            }, a);

            b = a.allow.split('');
            for ( i=0; i<b.length; i++) b[i] = "\\" + b[i];
            a.allow = b.join('');

            var regex = new RegExp('[^a-z0-9' + a.allow + ']', 'ig');

            $(this)
            .bind('keyup blur', function() {
                if (this.value.search(regex) != '-1') {
                    this.value = this.value.replace(regex, '');
                }
            })
            .bind('contextmenu',function () {return false});

        }
    })(jQuery);

    $("#element1").disableChars();
    $("#element2").disableChars({allow:".,:-() "});
</script>
</body>
</html>

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