ABOUT THIS DEMO:

InputMask can be assigned any text value you wish to use, and the control will smartly filter what goes into the mask. This demo is similar to the client-side version in functionality with the only difference being the assignment on the server at postback.

InputMask

The current mask for this InputMask is set to (nnn) nnn-nnnn, which means that it can only accept numeric input. Use the buttons below to move different values into the mask. Notice the characters that are restricted and the characters that are allowed.

Random text values

Proper length, proper type
Proper length, mixed type
Proper length, bad type
Longer length, proper type
Longer length, mixed type