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

Here I used DataTable to write data to excel file. I think data Grid View also same to the DataTable.

First get data from Database:

db.GetData(sqlgetprint);

It's call for method that method is:

class DataBaseConnection
{
    private OdbcConnection conn1 = new OdbcConnection(@"FILEDSN=C:/OTPub/Ot.dsn;" + "Uid=sa;" + "Pwd=otdata@123;"); //"DSN=Ot_DataODBC;" + "Uid=sa;" +  "Pwd=otdata@123;"

    //select
    public System.Data.DataTable GetData(string sql)
    {
        try
        {

            conn1.Open();
            OdbcDataAdapter adpt = new OdbcDataAdapter(sql, conn1);
            DataTable dt = new DataTable();
            adpt.Fill(dt);
            conn1.Close();
            return dt;

        }
        catch (Exception ex)
        {
            conn1.Close();
            throw ex;
        }
    }    
}

After that create Object for DataBaseConncetion Class in your working form

 DataBaseConnection db = new DataBaseConnection();

In your Button Click Event you can Write this Code to Write to the Excel file

string sqlgetprint = "SELECT  Service_No,Full_name, Acc_No, OP_date, On_time, Off_time, OP_hours, Payment  FROM   Print_Op ORDER BY Service_No , OP_date";
            DataTable dtall = db.GetData(sqlgetprint);

            SaveFileDialog saveFileDialog1 = new SaveFileDialog();
            saveFileDialog1.Filter = "Excel Documents (*.xls)|*.xls";
            saveFileDialog1.FileName = "Employee Details.xls";

            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                string fname = saveFileDialog1.FileName;


                StreamWriter wr = new StreamWriter(fname);
                for (int i = 0; i < dtall.Columns.Count; i++)
                {
                    wr.Write(dtall.Columns[i].ToString().ToUpper() + "\t");
                }

                wr.WriteLine();

                //write rows to excel file
                for (int i = 0; i < (dtall.Rows.Count); i++)
                {
                    for (int j = 0; j < dtall.Columns.Count; j++)
                    {
                        if (dtall.Rows[i][j] != null)
                        {
                            wr.Write(Convert.ToString(dtall.Rows[i][j]) + "\t");
                        }
                        else
                        {
                            wr.Write("\t");
                        }
                    }
                    //go to next line
                    wr.WriteLine();
                }
                //close file
                wr.Close();
                if (File.Exists(fname))
                {
                    System.Diagnostics.Process.Start(fname);
                }

            }
        }

        catch (Exception)
        {

            MessageBox.Show("Error Create Excel Sheet!");
        }