Character, Numeric, Character count validation for textbox using javascript in ASP.NET
In this client side validation, we are doing username validation for the text box. Here I am checking characters, numerics and total characters count between 5 to 10 (/^[a-z,A-Z,0-9]{5,10}$/;).If you want any other regular expressions please write in comments i will help you.
<html xmlns="http://www.w3.org/1999/xhtml"> <head> <title></title> <script type="text/javascript"> function ValidateForm() { var txtName = document.getElementById("txtName").value; var regularExpression = /^[a-z,A-Z,0-9]{5,10}$/; if (!txtName.match(regularExpression)) { alert("Name should be alpha numeric and characters count with in 5 to 10"); } } </script> </head> <body> User Name: <input type="text" id="txtName" /><br /> <br /> <input type='button' value="validate" onclick="ValidateForm();" /> </body> </html>
Before doing this operation you may need required field validation for textbox using javascript.
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