ASP.NET Date validation using both Validation and also in .cs file

Question

I am using a piece of code, from which I want to peek the selected date I am using this piece of code

<BDP:BasicDatePicker ID="Calendar1" runat="server" placeholder="DD-MM-YY"></BDP:BasicDatePicker>

and RequiredFieldValidator to check that the field is filled or not.

<asp:RequiredFieldValidator ControlToValidate="Calendar1" ID="RequiredFieldValidator3" runat="server" ErrorMessage="Must Input a date"></asp:RequiredFieldValidator>

Now I want to check if that date is well formatted or valid in format DD-MM-YY(10-Jun-2016)

You can try to use a <asp:CompareValidator> for that. See here: stackoverflow.com/a/939852/2851870 — Tasos K.
– Tasos K., Commented Jun 10, 2016 at 10:24

Oscar · Accepted Answer · 2016-06-10 08:54:46Z

1

Use a RegularExpressionValidator with an expression like:

<asp:RegularExpressionValidator ID="RegularExpressionValidator3" runat="server" ErrorMessage="Invalid date format. Valid dates are dd/mm/yyyy. " ControlToValidate="Calendar1" Display="None" EnableTheming="False" EnableViewState="False" SetFocusOnError="True" ValidationExpression="^(0?[1-9]|[12][0-9]|3[01])[\/](0?[1-9]|1[012])[\/]\d{4}$"></asp:RegularExpressionValidator>

answered Jun 10, 2016 at 8:54

Oscar

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