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Validate textBox RRS feed

  • Question

  • User-797751191 posted

    Hi

      I have Textbox in which user can multiple Dates . I want to check that User enters valid Data

    Data should be 02-06-2019 , 04-07-2019 , 01-06-2019 

    Thanks

    Thursday, July 4, 2019 4:47 AM

All replies

  • User288213138 posted

    Hi jsshivalik,

    You can use RegularExpressionValidator control to validates whether the value of an associated input control matches the pattern specified by a regular expression.

    Here is the Regular expression that matches all valid dates including leap years. Formats accepted mm/dd/yyyy or mm-dd-yyyy or mm.dd.yyyy format.

    The code:

     <asp:TextBox ID="txtRemarks" runat="server">
            </asp:TextBox>
            <asp:RegularExpressionValidator ControlToValidate="txtRemarks" ID="rfv0"
                ValidationExpression="^(?:(?:31(\/|-|\.)(?:0?[13578]|1[02]))\1|(?:(?:29|30)(\/|-|\.)(?:0?[1,3-9]|1[0-2])\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})$|^(?:29(\/|-|\.)0?2\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$|^(?:0?[1-9]|1\d|2[0-8])(\/|-|\.)(?:(?:0?[1-9])|(?:1[0-2]))\4(?:(?:1[6-9]|[2-9]\d)?\d{2})$"
                runat="server" ErrorMessage="please input Correct dates">
            </asp:RegularExpressionValidator>

    The result:

    Best regards,

    Sam

    Thursday, July 4, 2019 8:36 AM
  • User-797751191 posted

    Hi Samwu

      Can u pls explain the code

    Thanks

    Thursday, July 4, 2019 10:02 AM
  • User288213138 posted

    Hi jsshivalik,

    RegularExpressionValidator is a and validation controls.I said above validates whether the value of an associated input control matches the pattern specified by a regular expression.

    ValidationExpression is gets or sets the regular expression that determines the pattern used to validate a field.

    ControlToValidate is gets or sets the input control to validate.

    ErrorMessage is gets or sets the text for the error message displayed in a ValidationSummary control when validation fails.

    Best regards,

    Sam

    Friday, July 5, 2019 7:03 AM