javascript validation that should be done using asp.net controls in c# language

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i need validation for an simple field like text box,radio button or dropdown. label contains a name it should validate the details entering in the textbox like that.the field should not be empty and it should contain limited characters and no numeric should be allowed.if nothing is entered or selected it should display an error message.

Posted 23-Feb-12 18:04pm

meeraradha

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meeraradha 24-Feb-12 0:25am

please tell the code for radiobutton list validation

Varun Sareen 24-Feb-12 0:48am

add tag asp.net as well

Varun Sareen 24-Feb-12 0:49am

how much limit for the characters?

meeraradha 24-Feb-12 0:53am

for an numeric field the limit is 6 numbers and for character the field should not left blank.if blank error message should be display.

meeraradha 24-Feb-12 2:04am

thank you..i got the result for that.

Varun Sareen 24-Feb-12 3:08am

good

2 solutions

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Varun Sareen · Accepted Answer · 2012-02-23T19:07:00

try this:-

Lets say you have a form like this:-

<form name="subscribe" id="subscribe_frm" action="#">
Your Name: <input type="text" name="name" id="txt_name" />
<input type="button" name="submit" value="Submit">
onclick="validateTextBox();" onleyup="validChar();" />
</input></form>

<script language=""javascript"">
function validateTextBox()
{
 var txtN=document.getElementById('txt_Name');
 if(txtN.value=='')
 {
  alert('Textbox can't be blank');
  return false;
 }
 if(txtN.length>=[type the no of charaters you want the text to be limit])
 {
  alert('[Your prompt]');
  return false;
 }
}
function validChar()
{
 var txtN=document.getElementById('txt_Name');
 if(!txtN.value.match(/^[a-zA-Z]+$/))
 {
  alert('Enter only Characters');
  return false;
 }
}
</script>

Please don't forget to mark this as your answer if it helps you out. Queries are welcome

murugeshchinnu · Accepted Answer · 2012-02-23T19:14:00

Javascript code :

<script language="javascript" type="text/javascript">
function validate()
{
if (document.getElementById("<%=txt_uname.ClientID%>").value=="")
{
alert("UserName Feild can not be blank");
document.getElementById("<%=txt_uname.ClientID%>").focus();
return false;
}
if (document.getElementById("<%=txt_pwd.ClientID%>").value=="")
{
alert("Password Feild can not be blank");
document.getElementById("<%=txt_pwd.ClientID%>").focus();
return false;
}
if (document.getElementById("<%=txt_cpwd.ClientID%>").value=="")
{
alert("Confirm Passowrd Feild can not be blank");
document.getElementById("<%=txt_cpwd.ClientID%>").focus();
return false;
}

if (document.getElementById("<%=txt_age.ClientID%>").value=="")
{
alert("Age Feild can not be blank");
document.getElementById("<%=txt_age.ClientID%>").focus();
return false;
}
if(document.getElementById("<%=txt_email.ClientID %>").value=="")
{
alert("Email id can not be blank");
document.getElementById("<%=txt_email.ClientID %>").focus();
return false;
}
var emailPat = /^(\".*\"|[A-Za-z]\w*)@(\[\d{1,3}(\.\d{1,3}){3}]|[A-Za-z]\w*(\.[A-Za-z]\w*)+)$/;
var emailid=document.getElementById("<%=txt_email.ClientID %>").value;
var matchArray = emailid.match(emailPat);
if (matchArray == null)
{
alert("Your email address seems incorrect. Please try again.");
document.getElementById("<%=txt_email.ClientID %>").focus();
return false;
}
if (document.getElementById("<%=txt_mobile.ClientID%>").value=="")
{
alert("Mobile No is not valid");
document.getElementById("<%=txt_mobile.ClientID%>").focus();
return false;
}
var digits=/^([0-9]{10})$/;
var digitsid=document.getElementById("<%=txt_mobile.ClientID %>").value;
var digitsArray = digitsid.match(digits);
var temp;
if (digitsArray == null)
{
alert("Your mobile seems incorrect. Please try again.");
document.getElementById("<%=txt_mobile.ClientID %>").focus();
return false;
}

return true;
}
</script>

For submit button :

<asp:Button ID="btn_sub" runat="server" Font-Names="Verdana" Text="Submit" onclick="btn_sub_Click"Width="77px" OnClientClick=" return validate()"/>

javascript validation that should be done using asp.net controls in c# language

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