Set mask for a given character

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In my windows form I have a maskedtext box. For this text box user can type only a single character. And that character must be the "Y" or "N". Other characters not allowed for this. How can I use mask property for this case.

Posted 12-Jul-11 1:05am

Sanyon_d

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Prerak Patel · Answer 1 · 2011-07-12T01:20:00

Solution 2

You can use TextChanged event handler.
Check if the text is not "Y" or "N", clear the textbox and show message if required. There is no need to mask. This would work fine for single letter textbox.

You can use dropdownlist instead.

Posted 12-Jul-11 1:20am

Prerak Patel

Comments

Espen Harlinn 12-Jul-11 10:15am

Nice and simple, my 5

Sergey Alexandrovich Kryukov 12-Jul-11 13:14pm

Well, solution is correct but -- "Don't be a problem solver!".
The problem is inadequate choice of UI element.

Please see my solution.
--SA

Espen Harlinn 12-Jul-11 13:27pm

For all we know, using a textbox might be part of the requirements ...

Sergey Alexandrovich Kryukov 12-Jul-11 13:30pm

My answer to "requirements" -- "Don't be a problem solver". Actually a decent leader posting requirements expect developer's feedback in them.
--SA

Espen Harlinn 12-Jul-11 14:28pm

There are, in some places, some cultural aspects that may prevent this ...

Sergey Alexandrovich Kryukov · Answer 2 · 2011-07-12T07:13:00

Solution 3

Why so complex and confusing way? Simply use too radio buttons: "Yes", "No". Better yet, one check box "I confirm it" or something.

—SA

Posted 12-Jul-11 7:13am

Sergey Alexandrovich Kryukov

Comments

Espen Harlinn 12-Jul-11 13:27pm

... but you do have a point, my 5 :)

Sergey Alexandrovich Kryukov 12-Jul-11 13:30pm

Thank you, Espen. I knew you would understand it.
--SA

musefan · Answer 3 · 2011-07-12T01:16:00

I think perhaps the closest is to use the mask value of "L" - this will restrict the input to only one letter. You would then have to apply your own additional validation to decide if that value is valid (i.e. Y or N)

Can I ask why you are using a textbox thou? It seems you would be better suited to use a checkbox or a dropdownlist for this kind of UI behaviour