String Lookup Validator Class

TStringLookupValidator is a working example of a lookup validator; it compares the string passed from the edit control with the items in a string list.

If the passed-in string occurs in the list, TStringLookupValidator::IsValid returns true.

The constructor takes only one parameter, a pointer to a TSortedStringArray object containing the list of valid strings:

TStringLookupValidator(TSortedStringArray* strings);

Using a different string list

To use a different string list after constructing the string lookup validator, use member function TStringLookupValidator::NewStringList, which disposes of the old list and installs the new list.

TStringLookupValidator overrides TStringLookupValidator::Lookup and TStringLookupValidator::Error. Lookup returns true if the passed-in string is in the list. Error displays a message box indicating that the string is not in the list.

See Also

• Validator Base Class
• Filter Validator Class
• Range Validator Class
• Lookup Validator Class
• Picture Validator Class