How to allow only 4 digit in a textbox

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Hi all

I am working in a touch screen environment where I am having one screen where i have number buttons 0-9 using which i am entering PIN number of 4 digit.

I changed the MaxLength property of that text box.
when i m entering the value to that text box using keyboard, it's working fine means it is not allowing me to enter more then 4 digits,but when i m entering using the number buttons, it is allowing me to enter more then 4.

Please tell me what is the problem.

Thank you

Posted 4-Jan-15 19:11pm

Black_Rose

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Sergey Alexandrovich Kryukov 5-Jan-15 1:22am

For the TextBox? Not a problem, but first please tell us: which one? There are different similar but unrelated types under this name. Full type name, please.
—SA

3 solutions

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George Jonsson · Answer 1 · 2015-01-04T19:25:00

Solution 1

You could try to use the MaskedTextBox Class[^]
It might make it easier to control the input.

Posted 4-Jan-15 19:25pm

George Jonsson

Mukesh.Ce62 · Answer 2 · 2015-01-04T22:39:00

Solution 2

XML

<asp:TextBox ID="txtdigit" runat="server" MaxLength="4"></asp:TextBox>
    <asp:RegularExpressionValidator ID="RegularExpressionValidator1" ControlToValidate="txtdigit" ValidationExpression="^[0-9]+$" runat="server" ErrorMessage="Please enter only numeric value."></asp:RegularExpressionValidator>

Posted 4-Jan-15 22:39pm

Mukesh.Ce62

Updated 5-Jan-15 1:39am

v2

Comments

CHill60 5-Jan-15 4:46am

OP tagged question with "Windows" which implies that ASP is off topic

victowork · Answer 3 · 2015-01-04T22:46:00

Solution 3

what u have written inside the button clicks check that hope ur setting the values directly to the text boxes without checking the length validation

Posted 4-Jan-15 22:46pm

victowork