CODEWITHSUNDEEP
asp.net-mvc
Fraz Sundal
Fraz Sundal

Reputation: 10448

Html.TextArea maxlength problem in asp.net mvc

Im using Html.TextArea in my application and when i set its maxlength property to 255. It doesnt work and write more than 255 characters. how can this problem be solved

Upvotes: 0

Views: 6622

Answers (4)

Simon
Simon

Reputation: 5493

This will prevent longer text being entered or pasted into any text areas. All you need to do is add the 'maxlength' attribute.

$(function () {
    //This bit will prevent the user from typing in too many characters...
    $('textarea').keypress(function (e) {
        //TODO: error handling...
        var limit = parseInt($(this).attr('maxlength'));
        var currentText = $(this).val();
        var chars = currentText.length;

        //too many charaters?
        if (chars >= limit) {
            e.preventDefault(); //cancel the key press
        }
    });

    //This bit will prevent the user pasting in long strings...
    $('textarea').bind('paste', function () {
        //TODO: error checking
        var limit = parseInt($(this).attr('maxlength'));
        var element = $(this);
        setTimeout(function () {
            var currentText = element.val();            
            var chars = currentText.length;
            if (chars > limit) {                
                //get the first 'n' characters
                var newText = currentText.substr(0, limit);
                //and replace the text.
                element.val(newText);
            }
        }, 10);
    });
});

Upvotes: 1

SageNS
SageNS

Reputation: 366

You can use a JavaScript validator. For example,

    function limitText(limitField, limitCount, limitNum) {
        if (limitField.value.length > limitNum) {
            limitField.value = limitField.value.substring(0, limitNum);
        } else {
            limitCount.value = limitNum - limitField.value.length;
        }
    }
<textarea name="limitedtextarea" onKeyDown="limitText(this.form.limitedtextarea,this.form.countdown,255);"

Upvotes: 0

Pointy
Pointy

Reputation: 413717

The HTML <textarea> tag does not support the "maxlength" property. A variety of Javascript solutions exist, some for frameworks and others stand-alone. Basically it's necessary to catch keypress events (with Javascript) and track the content length. Usually some messaging to users is considered a Really Good Idea, like the Stackoverflow "Comment" boxes have.

Upvotes: 1

Tor-Erik
Tor-Erik

Reputation: 1000

Take a look at this: How to impose maxlength on textArea in HTML using JavaScript

Upvotes: 2

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