Textbox validation in jquery disabling space

Question

How can I disable space as first character in the textbox in asp.net c# using jquery?

if you got the answer then please select your answer...

Sachin
– Sachin

2014-01-09 05:42:21 +00:00
Commented Jan 9, 2014 at 5:42 — Sachin
– Sachin, Commented Jan 9, 2014 at 5:42

AbdulRahman Ansari · Accepted Answer · 2014-01-09 05:12:54Z

2

Try

function validateTextBox()
{
    var txt = document.getElementById('<%= TextBox1.ClientID %>').value;
        if(txt.charAt(0)==' '){
           alert("No space allowed in the beginning");
           }
}

edited Jan 9, 2014 at 5:12

AbdulRahman Ansari

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answered Jan 9, 2014 at 4:55

MusicLovingIndianGirl

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Comments

Amit · Accepted Answer · 2014-01-09 05:05:00Z

0

You can achieve this using JQUERY as below:

$(function(){
    $("#a").keypress(function(evt){
         var cc = (evt.charCode) ? evt.charCode : ((evt.which) ? evt.which : evt.keyCode);
        if($(this).val().length==0){
            if(cc==32)
                 return false;
             }
    });

});

a is the your textbox Id

DEMO

answered Jan 9, 2014 at 5:05

Amit

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Comments

kiro · Accepted Answer · 2014-01-09 05:04:44Z

-1

This problem isn't related to C#/asp.net. All u need is javascript.

just try to catch the onkeydown event.

$("#text").keydown(function(){
    var txt = $(this).value;
    if(txt.charAt(0)==' '){
       alert("No space in the beginning");
       txt.value(txt.replace(" ",""));//clear first space in text
     }
});

text is id of input

answered Jan 9, 2014 at 5:04

kiro

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