I want to create xlsx (Excel) file from c#

Question

This is a code which could create only create xls file. But I want to create xlsx (Excel) file; how can I do that from this code or else can I have another code which I could use to create xlsx files.

using Excel = Microsoft.Office.Interop.Excel;
using System.Runtime.InteropServices;


Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();

            if (xlApp == null)
            {
                MessageBox.Show("Excel is not properly installed!!");
                return;
            }


            Excel.Workbook xlWorkBook;
            Excel.Worksheet xlWorkSheet;
            object misValue = System.Reflection.Missing.Value;

            xlWorkBook = xlApp.Workbooks.Add(misValue);
            xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

            xlWorkSheet.Cells[1, 1] = "ID";
            xlWorkSheet.Cells[1, 2] = "Name";
            xlWorkSheet.Cells[2, 1] = "1";
            xlWorkSheet.Cells[2, 2] = "One";
            xlWorkSheet.Cells[3, 1] = "2";
            xlWorkSheet.Cells[3, 2] = "Two";



            xlWorkBook.SaveAs("d:\\vdfgdfg.xls", Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
            xlWorkBook.Close(true, misValue, misValue);
            xlApp.Quit();

            Marshal.ReleaseComObject(xlWorkSheet);
            Marshal.ReleaseComObject(xlWorkBook);
            Marshal.ReleaseComObject(xlApp);

            MessageBox.Show("Excel file created , you can find the file d:\\csharp-Excel.xls");
        }

Answer 1

Please try below updated code.

    public void CreateExcel()
    {
      Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();

        if (xlApp == null)
        {
            MessageBox.Show("Excel is not properly installed!!");
            return;
        }


        Microsoft.Office.Interop.Excel.Workbook xlWorkBook;
        Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet;
        object misValue = System.Reflection.Missing.Value;

        xlWorkBook = xlApp.Workbooks.Add(misValue);
        xlWorkSheet = (Microsoft.Office.Interop.Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

        xlWorkSheet.Cells[1, 1] = "ID";
        xlWorkSheet.Cells[1, 2] = "Name";
        xlWorkSheet.Cells[2, 1] = "1";
        xlWorkSheet.Cells[2, 2] = "One";
        xlWorkSheet.Cells[3, 1] = "2";
        xlWorkSheet.Cells[3, 2] = "Two";

                  //Here saving the file in xlsx
                xlWorkBook.SaveAs("d:\\vdfgdfg.xlsx", Microsoft.Office.Interop.Excel.XlFileFormat.xlOpenXMLWorkbook, misValue,
                misValue, misValue, misValue, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);


        xlWorkBook.Close(true, misValue, misValue);
        xlApp.Quit();

        Marshal.ReleaseComObject(xlWorkSheet);
        Marshal.ReleaseComObject(xlWorkBook);
        Marshal.ReleaseComObject(xlApp);

        MessageBox.Show("Excel file created , you can find the file d:\\csharp-Excel.xlsx");
    }