Hi Arun,
Here is a complete code sample with the latest approaches to convert a sheet into a multiple page TIFF image.
//Define load options
LoadOptions lopts = new LoadOptions(LoadFormat.Xlsx);
//Instantiate Workbook to load Xlsx
Workbook workbook = new Workbook(@“D:\somexlsx.xlsx”, lopts);
//Define image options
Aspose.Cells.Rendering.ImageOrPrintOptions imgOptions = new Aspose.Cells.Rendering.ImageOrPrintOptions();
imgOptions.ImageFormat = System.Drawing.Imaging.ImageFormat.Tiff;
imgOptions.VerticalResolution = 200;
imgOptions.HorizontalResolution = 200;
//Render first worksheet to TIFF
Worksheet sheet = workbook.Worksheets[0];
Aspose.Cells.Rendering.SheetRender sr = new Aspose.Cells.Rendering.SheetRender(sheet, imgOptions);
sr.ToTiff(@“d:\tiffs\TIFFIMAGE.tiff”);
Kind Regards