I would like to validate my textbox which accepts Academic Year as input in the format YYYY-YY. How do I write a regular expression validation/ jquery client validation function for this?
function parseDate() {
alert("yeah");
var sAcadYearName = document
.getElementById('<%= txtAcademicYearName.ClientID%>');
var m = sAcadYearName.match(/^(\d{1,2})\/(\d{1,2})\/(\d{4})$/);
return (m) ? new Date(m[3], m[2] - 1, m[1]) : null;
}
It depends how complicated you want to go, if you just want to validate numbers it can be as simple as
\d\d\d\d-\d\d
if you want to be just within 19XX-YY or 20XX-YY then
(\b19|\b20)\d\d-\d\d
if you need more specific rules (e.g. 1981-99) and you need to write some custom javascripts to perform validation.
Try this code
<input id="txtdob" type="text"/>
<asp:RegularExpressionValidator ID="RegularExpressionValidator4" runat="server" ForeColor="Red"
ControlToValidate="txtdob" ValidationGroup="check" ErrorMessage="Date format in YYYY-YY"
ValidationExpression="^([0-9]{4})[.--]+([0-9]{2})$"></asp:RegularExpressionValidator>
Eidt:
Just change and try it
<input id="txtdob" runat="server" type="text" />
<asp:RegularExpressionValidator ID="RegularExpressionValidator4" runat="server" ForeColor="Red"
ControlToValidate="txtdob" ValidationGroup="check" ErrorMessage="Date format in YYYY-YY"
ValidationExpression="^([0-9]{4})[./-]+([0-9]{2})$"></asp:RegularExpressionValidator>
<asp:Button runat="server" ValidationGroup="check" />
</div>
Or add this line where your code!
var m = sAcadYearName.match(^([0-9]{4})[./-]+([0-9]{2})$);
It's like validate for :
2013/14 or 2013-14
function parseDate(str) {
var m = str.match(/^(\d{1,2})\/(\d{1,2})\/(\d{4})$/);
return (m) ? new Date(m[3], m[2]-1, m[1]) : null;
}
Check out this jQuery validation plugin. It has demos, and a lot of ways to filter form field input. Enjoy!
You can go this link here is a good example http://www.regular-expressions.info/dates.html
or you can check out this link also
Here is my solution, I have added a regular ecpression validator for my textbox like so.
<asp:RegularExpressionValidator id="txtAcademicYearName_RegularExpressionValidator2" runat="server" ControlToValidate="txtAcademicYearName" ErrorMessage="Enter year in format YYYY-YY" ValidationExpression="(\b19|\b20)\d\d-\d\d" ForeColor="Red" Display="None" ValidationGroup="AcademicYear"></asp:RegularExpressionValidator>
