Pesquise formatos XLS em C#

// searching cells containing specified string value or number
Workbook workbook = new Workbook("book1.xls");

// get cells collection
Cells cells = workbook.Worksheets[0].Cells;

FindOptions opts = new FindOptions();
opts.LookInType = LookInType.Values;
opts.LookAtType = LookAtType.EntireContent;

// find the cell with the input integer or double
Cell cell1 = cells.Find(205, null, opts);

if (cell1 != null){
    Console.WriteLine("Name of the cell containing the value: " + cell1.Name);
}else{
    Console.WriteLine("Record not found ");
}

// find the cell with the input string
Aspose.Cells.Cell cell2 = cells.Find("Items A", null, opts);

if (cell2 != null){
    Console.WriteLine("Name of the cell containing the value: " + cell2.Name);
}else{
    Console.WriteLine("Record not found ");
}

// find the cell containing with the input string
opts.LookAtType = LookAtType.Contains;
Cell cell3 = cells.Find("Data", null, opts);

if (cell3 != null){
    Console.WriteLine("Name of the cell containing the value: " + cell3.Name);
}else{
    Console.WriteLine("Record not found ");
}