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

Check out Create Excel files from C# without office as this refers to using EPPlus which works very well - I was able to create my CSV data from the data table and the bulk load in memory the Excel file to stream out. Simply a few lines of code. Varible csvData is string value of all your csvData.

    using( ExcelPackage pck = new ExcelPackage( ) )
    {
      //Create the worksheet
      ExcelWorksheet ws = pck.Workbook.Worksheets.Add( "Sheet1" );

      // set the delimiter
      etf.Delimiter = ',';
      etf.EOL = "\n";
      etf.TextQualifier = "\"";

      //Load the datatable into the sheet, starting from cell A1. Print the column names on row 1
      ws.Cells["A1"].LoadFromText( csvData, etf );
      return pck.GetAsByteArray( );
   }