Trefor said:
Is it possible to check that a cell only contains Alphanumerical
(a-Z, 0-9)?
Yes. The simplest way involves using a define name, ALPHANUM defined as
={"0";"1";"2";"3";"4";"5";"6";"7";"8";"9";"A";"B";"C";"D";"E";"F";"G";"H";
"I";"J";"K";"L";"M";"N";"O";"P";"Q";"R";"S";"T";"U";"V";"W";"X";"Y";"Z"}
and use formulas like
=SUMPRODUCT(LEN(x)-LEN(SUBSTITUTE(UPPER(x),ALPHANUM,"")))=LEN(x)
