Export Multiple Sheets of a Large Excel File to Separate CSV Files in C#. To learn more check our step by step guide in the following topic: https://kb.aspose.com/cells/net/how-to-export-large-excel-file-to-csv-in-c-sharp/.

Export Multiple Sheets of a Large Excel File to Separate CSV Files in C#.cs

using System;
//Add reference to Aspose.Cells for .NET API
//Use following namespaces to Export excel file to CSV
using Aspose.Cells;

namespace ExportLargeExcelFiletoCSV
{
    class Program
    {
        static void Main(string[] args)
        {
            //Set Aspose license before exporting Excel file to CSV file format
            //using Aspose.Cells for .NET
            Aspose.Cells.License AsposeCellsLicense = new Aspose.Cells.License();
            AsposeCellsLicense.SetLicense(@"c:\asposelicense\license.lic");

           
            //For optimized memory usage for large excel file use 
            //MemoryPreference MemorySetting option
            LoadOptions OptionsLoadingLargeExcelFile = new LoadOptions();
            OptionsLoadingLargeExcelFile.MemorySetting = MemorySetting.MemoryPreference;

            //Create an instance of Workbook class to load input large excel file
            //Also pass the MemoryPreference load options to the constructor
            Workbook ExportExcelToCSVWorkBook = new Workbook("Large_Excel_To_Export.xlsx", OptionsLoadingLargeExcelFile);

            //To save multiple sheets in a workbook use following code
            for (int SheetIndex = 0; SheetIndex < ExportExcelToCSVWorkBook.Worksheets.Count; SheetIndex++)
            {
                ExportExcelToCSVWorkBook.Worksheets.ActiveSheetIndex = SheetIndex;
                ExportExcelToCSVWorkBook.Save("Exported_CSV_" + SheetIndex + ".csv", SaveFormat.Csv); 
            }



        }
    }
}

To learn more check our step by step guide in the following topic: How to Export Large Excel File to CSV in C#