textbox to enter only alphabets.

There are ways to make this happen, using regular expression, JavaScript validation, etc.

I would prefer Masked Textbox for it, something like: Enhanced Textbox Control[^]

var value = "a";
var reg = new RegExp("[A-Za-z]");

if (!reg.test(value)) {
   return false;
}

try with this.

Thanks,
Mamun

you must add from Toolbox in Validation and select RequiredExpressionValidator;
and in properties "ControlToValidat" select filed name ex: Textbox1
and select Expression mask from ValidationExpression

for alphabets "\w+"


S.Dwaik

function onlyAlphabets(e, t) {
try {
if (window.event) {
var charCode = window.event.keyCode;
}
else if (e) {
var charCode = e.which;
}
else { return true; }
if ((charCode > 64 && charCode < 91) || (charCode > 96 && charCode < 123))
return true;
else
return false;
}
catch (err) {
alert(err.Description);
}
}