This short tutorial guides on how to lock cells in Excel using C#. It has details to set the IDE, a list of cells, and a sample code to lock selected cells in Excel using C#. All the details are discussed and demonstrated to create the appropriate locked cells in the target sheet and set their desired behaviour.

Steps to Lock Certain Cells in Excel using C#

1. Set the IDE to use Aspose.Cells for .NET to lock cells in a sheet
2. Import the required classes and modules from the library
3. Apply a license to avoid watermarks and other limitations
4. Load the Excel file into the Workbook object and access the target sheet
5. Apply a global lock to make everything editable
6. Apply the lock to the target cells
7. Enforce the lock settings on the worksheet using the Protect method
8. Save the Workbook on the disks

These steps summarize how to how to lock some cells in Excel using C#. Import the required modules, set the paths for the license, input Excel file and output Excel file, configure the license, load the workbook, and select the target sheet. Then, make everything editable on the sheet, lock only the cells you want and enforce the lock settings before saving the Excel file.

Code to Lock Specific Cells in Excel using C#

The above code demonstrates how to protect certain cells in Excel using C#. Note that making all the cells editable first is an optional step and can be skipped. Similarly, enforcing the lock settings through the Protect method is necessary to lock the cells properly because using the locked style option only will not suffice.

This article has taught us the process of locking cells in Excel. To add checkmark in an Excel file, refer to the article Add check mark in Excel using C#.