how to filter out non-digit chars when user writes text to System.Windows.Forms.TextBox

[Ivan]

Hi,
how to filter out non-digit chars when user writes text to System.Windows.Forms.TextBox?

Thanks,
Iavmn

 

[Pete Davis]

Hi,

how to filter out non-digit chars when user writes text to
System.Windows.Forms.TextBox?

Thanks,
Iavmn

Subscribe to the TextBox.KeyPress event. Check the character in the event
arguments. If it's a non-digit, set e.Handled=true; and that should prevent
the character from being allowed. You might want to do a beep or something
as well.

Pete

 

[Ivan]

Subscribe to the TextBox.KeyPress event. Check the character in the event
arguments. If it's a non-digit, set e.Handled=true; and that should prevent
the character from being allowed. You might want to do a beep or something
as well.

Pete

that worked. thanks
Ivan

 

[Jeremy Williams]

Note that this technique only prevents users from manually typing the
non-digit characters in the textbox - they can still paste the non-digit
characters from the clipboard. You might want to also implement an event
handler for the TextChanged property and replace all non-digit characters
there.