When protecting a worksheet/workbook, by default all cells are Locked making them unable to be modified by a user. GcExcel .NET allows you to Unlock certain cells or specified ranges so users can modify them based on your requirement.
1. Get a specified range on a sheet
2. Set the Locked Property to False
3. Protect the sheet
Step 1: Get a specified range on a sheet
Step 2: Set the Locked Property to False
Set the specified ranges Locked Property to False
Step 3: Protect the sheet
Finally, using the Protect Method, protect the workbook so that it cannot be modified
Notice after protecting the workbook, all of the cells expect for the unlocked range is unable to be modified.