What is the fastest way to export dataGridView rows to Excel or into an SQL Server database

Question

What is the fastest way to export DataGridView rows in the range of 460328 - 800328 to Excel or into an SQL Server database table with out using Microsoft office interop as

Answer 1

This may be faster way,

    using Excel = Microsoft.Office.Interop.Excel;

    public static void SaveGridToExcel(DataGridView DGV)
    {

        if (DGV.Rows.Count > 0)
        {
            string filename = "";
            SaveFileDialog SV = new SaveFileDialog();
            SV.Filter = "EXCEL FILES|*.xlsx;*.xls";
            DialogResult result = SV.ShowDialog();


            if (result == DialogResult.OK)
            {

                filename = SV.FileName;
                bool multiselect = DGV.MultiSelect;
                DGV.MultiSelect = true;
                DGV.SelectAll();
                DGV.ClipboardCopyMode = DataGridViewClipboardCopyMode.EnableAlwaysIncludeHeaderText;
                Clipboard.SetDataObject(DGV.GetClipboardContent());
                var results = System.Convert.ToString(Clipboard.GetData(DataFormats.Text));
                DGV.ClearSelection();
                DGV.MultiSelect = multiselect;
                Microsoft.Office.Interop.Excel.Application XCELAPP = null;
                Microsoft.Office.Interop.Excel.Workbook XWORKBOOK = null;
                Microsoft.Office.Interop.Excel.Worksheet XSHEET = null;
                object misValue = System.Reflection.Missing.Value;
                XCELAPP = new Excel.Application();
                XWORKBOOK = XCELAPP.Workbooks.Add(misValue);
                XCELAPP.DisplayAlerts = false;
                XCELAPP.Visible = false;
                XSHEET = XWORKBOOK.ActiveSheet;
                XSHEET.Paste();
                XWORKBOOK.SaveAs(filename, Excel.XlFileFormat.xlOpenXMLWorkbook);
                XWORKBOOK.Close(false);
                XCELAPP.Quit();
                try
                {                      
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(XSHEET);
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(XWORKBOOK);
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(XCELAPP);
                }
                catch { }
            }
        }
    }