1. Web service (Validation.asmx):
[System.Web.Script.Services.ScriptService]
public class Validation : System.Web.Services.WebService
{ public bool GetPostCodeValidation(string statename, string postcode)
{
if (postcode == "") return true;
if (statename == "") return true;
System.Text.RegularExpressions.Regex r;
switch (statename)
{
case "CA":
r = new System.Text.RegularExpressions.Regex(@"^([ABCEGHJKLMNPRSTVXY]\d[ABCEGHJKLMNPRSTVWXYZ])\ {0,1}(\d[ABCEGHJKLMNPRSTVWXYZ]\d)$");
return r.IsMatch(postcode.ToUpper());
case "US":
r = new System.Text.RegularExpressions.Regex(@"^(\d{5}-\d{4}|\d{5}|\d{9})$|^([a-zA-Z]\d[a-zA-Z] \d[a-zA-Z]\d)$");
return r.IsMatch(postcode);
default:
return true;
}
}
}
2. JQuery ajax call
<script type="text/javascript">
function ValidatePostCode(source, args) {
var pc = $("#<%=textboxPostalCode.ClientID %>").val();
var state = $("#<%=dropdownlistProvince.ClientID %>").val();
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: '<%=ResolveClientUrl("~/Validation.asmx/GetPostCodeValidation")%>',
data: "{'statename':'" + state + "','postcode':'" + pc + "'}",
dataType: "json",
async: false,
success: function (data) {
args.IsValid = data.d;
}
});
}
</script>
Please use synchronized call
3. Add custom validator in Html view
<asp:TextBox ID="textboxPostalCode" runat="server"/>
<asp:CustomValidator ID="customValidatorPostcode" runat="server" ControlToValidate="txtPostalCode" ClientValidationFunction="ValidatePostCode"/>
