The following properties will save you the work of writing validation
code since they will automatically enforce certain data-entry constraints on the
user.
MaxLength
The TextBox
control's MaxLength
property allows you to specify the maximum number
of characters that the user can enter into a
TextBox. If the user tries to enter more than
the maximum allowed, then the input is ignored.
If you set MaxLength's
value to 0 (its default value), then there is
no maximum length and the user can enter as
many characters as desired (up to the 32K limit
on the Text property's
size).
Data-Bound
Properties
These properties are only useful when the controls to which they
belong are bound to data:
-
DataChanged is a property that allows the programmer
to distinguish between changes made to a bound control's contents by the underlying
data engine (caused by data navigation or updates from other users) versus changes
made in the application by users or program code.
-
DataFormat allows the programmer to specify a mask
for formatting data when it is retrieved from and stored to the underlying data
structure.
