Question

I am Using textbox for input date user.
How to auto masking when user input value date with format mask “dd-MM-yyyy”

Thanks

Answer 1

I’m not sure I understand your question, but you can use an ASP.NET CompareValidator to ensure the input is a valid date:

<asp:CompareValidator 
    id="cv_date" runat="server"  
    Type="Date" 
    Operator="DataTypeCheck" 
    ControlToValidate="tb_my_textbox"  
    ErrorMessage="Please enter a valid date."> 
</asp:CompareValidator>