How to validate an ASP.Net TextBox Control Using Javascript
Features :
1. Simple way to access JavaScript function and assign to a particular asp.net control
2. Using VB.Net as well as C#.Net Code for Embed the JavaScript Function to ASP.Net ControlCODE
put the below code inside the Head tag of .aspx file
'<'script language="javascript" type="text/javascript" '>'
//Because of restriction i put < > in between single quote(' ') please remove those (') from there.
function validateNumber(txtbox1)
{ var str=txtbox1.value;
var str1="0123456789";
var i=0;
for(i=0;i
if(str1.indexOf(str.substring(i,i+1))<0 || str1.indexOf(str.substring(i,i+1))>str1.length)
{
txtbox1.value=str.substring(0,str.length-1);
alert("Enter Only Number");
txtbox1.focus();
break;
}
}
}
'<' '/'script '>'
//Add one textbox control of asp.net named as TextBox1
Then Add the following code into page load eventUSING VB.Net
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
TextBox1.Attributes.Add("onKeyup", "javascript:validateNumber(TextBox1)")
End SubUSING C#.Net
protected void Page_Load(object sender, EventArgs e)
{
TextBox1.Attributes.Add("onKeyup", "javascript:validateNumber(TextBox1)");
}
Regards,
Manoranjan Sahoo
Visit My Blog : http://msahoo.wordpress.com
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hi
function TxtVal()
{
var t1=document.getElementById("TextBox1").value;
if (t1='Welcome')alert('Yes')else alert('False')
retrun false
}
TextBox1.Attributes.Add("onkeyup", "javascript:TxtVal());