using Microsoft.Office.Interop.Excel; public void activateWorksheet(string sheetName) { Excel.Application excelApp = new Excel.Application(); Excel.Workbook excelWorkbook = excelApp.Workbooks.Open(@"C:\Sample.xlsx"); Excel.Worksheet excelWorksheet = excelWorkbook.Worksheets[sheetName]; excelWorksheet.Activate(); }
using Excel = Microsoft.Office.Interop.Excel; public void activateWorkbook() { Excel.Application excelApp = new Excel.Application(); Excel.Workbook excelWorkbook = excelApp.ActiveWorkbook; excelWorkbook.Activate(); }Package library: Microsoft.Office.Interop.Excel.