NuGet Package Manager의 무료 Spire.XLS dll을 사용하면 다른 셀에서 동일한 값을 찾을 수 있습니다.
Spire.Xls.Workbook workbook = new Spire.Xls.Workbook();
workbook.LoadFromFile(@"D:\\input.xlsx", ExcelVersion.Version2010);
//find and highlight excel data
Spire.Xls.Worksheet sheet = workbook.Worksheets[0];
foreach (CellRange range in sheet.FindAllString("Customer PO Number", false, false))
{
range.Style.Color = Color.LawnGreen;
}
//save and launch the project
workbook.SaveToFile("result.xlsx", ExcelVersion.Version2010);
System.Diagnostics.Process.Start("result.xlsx");