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Posted By: Karthikeyan Anbarasan     Posted Date: December 30, 2010    Points:2   Category :C#
How to make a text box to accept only numeric using javascript in C# based code

Author: Gautam Kanaujia             
Posted Date: December 31, 2010     Points: 5   

Add the handler to the TextBox:
TextBox1.Attributes.Add("onkeydown", "JavaScript:return isNumericKeyStroke();");

function isNumericKeyStroke()
{ var returnValue = false;
var keyCode = (window.event.which) ? window.event.which : window.event.keyCode;
if ( ((keyCode >= 48) && (keyCode <= 57))
|| // All numerics (keyCode == 8) || // Backspace (keyCode == 13) ) // Carriage Return returnValue = true;
if ( window.event.returnValue ) window.event.returnValue = returnValue;
return returnValue;}

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