I have an apex page item P10_NAME here i need to enter only capital letter , it should not allow users to enter lower case, while entering the data i need to restrict instead of checking while save the record.
How to perform this
Eg: P10_NAME : hjhjhj --- it should not allow lower case
P10_NAME : ASDASD ---- allow
It is Apex 20.2 (don't have 5.x any more so I can't check); it lets you use appropriate settings which take care about letter case:
If your Apex version doesn't support it, then navigate to "Advanced" set of properties and put this into Custom Attributes:
style="text-transform:uppercase"