How to Open an XLS File in Excel. XLS files are Excel workbook files created in Excel 97 or Excel 2003. The 2007, 2010 and 2013 versions of the program use the XLSX format by default to save ...

While it is technically possible to open an Excel file in Notepad, this is not a good idea. Excel files are binary files that contain complex formatting and data structures. When you open an Excel ...

Install IronXL Excel Library from NuGet or the DLL download Use the WorkBook.Load method to read any XLS, XLSX or CSV document. Get Cell values using intuitive syntax: sheet[“A11 ...

Install IronXL Excel Library from NuGet or the DLL download Use the WorkBook.Load method to read any XLS, XLSX or CSV document. Get Cell values using intuitive syntax: sheet[“A11 ...

In comparison, an XLSX file is a regular Excel spreadsheet that doesn't contain this type of code and doesn't require any special steps to open the file and start working.

If your Excel files are opening in Notepad on Windows PC, here's how you can reset the settings to make .xls, .xlsx, etc files open in Excel.