<script type="text/javascript">
function CustDateValidator_ServerValidate(sender, args) {
var dateString = document.getElementById("ddlday").value + "/" + document.getElementById("ddlmonth").value + "/" + document.getElementById("ddlYear").value;
var regex = /(((0[1-9])|([1-31]))\/([1-9])|(0[1-9])|(1[0-2]))\/((19|20)\d\d)$/;
if (regex.test(dateString)) {
var parts = dateString.split("/");
var dt = new Date(parts[1] + "/" + parts[0] + "/" + parts[2]);
args.IsValid = (dt.getDate() == parts[0] && dt.getMonth() + 1 == parts[1] && dt.getFullYear() == parts[2]);
} else {
args.IsValid = false;
}
}
</script>
<%
protected void CustDateValidator_ServerValidate(object source, ServerValidateEventArgs args)
{
DateTime dt;
//ddlYear
DateTime dtc;
args.IsValid = false;
try
{
dtc = Convert.ToDateTime(ddlYear.SelectedValue + "/" + ddlmonth.SelectedValue + "/" + ddlday.SelectedValue);
args.IsValid = true;
}
catch (Exception)
{
args.IsValid = false;
}
}
%>
<asp:DropDownList ID="ddlYear" runat="server" ClientIDMode="Static" AutoPostBack="true" OnSelectedIndexChanged="ddlYearchange">
<asp:ListItem Value="0" Selected="True">YYYY</asp:ListItem>
</asp:DropDownList>
<asp:DropDownList ID="ddlmonth" runat="server" ClientIDMode="Static" AutoPostBack="true" OnSelectedIndexChanged="ddlmonthchange">
<asp:ListItem Value="0" Selected="True">MM</asp:ListItem>
</asp:DropDownList>
<asp:DropDownList ID="ddlday" runat="server" ClientIDMode="Static" AutoPostBack="true" OnSelectedIndexChanged="ddldaychange">
<asp:ListItem Value="0" Selected="True">DD</asp:ListItem>
</asp:DropDownList>
<asp:CustomValidator runat="server" ID="CustDateValidator" OnServerValidate="CustDateValidator_ServerValidate"
ClientValidationFunction="CustDateValidator_ServerValidate" CssClass="errorMsg" ErrorMessage="Please select valid date"
ValidationGroup="Vg" />
