How do I import excel into datagridview? I have tried this follwing

public void Loadexcel()
        {
            string FileName = "PartList.xlsx";
            String name = "Sheet1";
            String connectionString = "";

            if (FileName.Substring(FileName.LastIndexOf('.')).ToLower() == ".xlsx")
                connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + FileName + ";Extended Properties=\"Excel 12.0;HDR= YES;IMEX=0\"";
            else
                connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + FileName + ";Extended Properties=\"Excel 8.0;HDR=YES;IMEX=0\"";

            //string connectionString = String.Format(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 12.0 XML;HDR=YES;IMEX=1;""", "D:\\PartList.xlsx");

            //string connectionString = String.Format(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 8.0;HDR=YES;IMEX=1;""", txtPath.Text);
            string query = String.Format("select * from [{0}$]", name);

            OleDbConnection con = new OleDbConnection(connectionString);
            System.Data.OleDb.OleDbDataAdapter adapter = new System.Data.OleDb.OleDbDataAdapter(query, con);

            ds = new System.Data.DataSet();

            adapter.Fill(ds);



            DataTable dtView = ds.Tables[0];
            if (dtView.Rows.Count > 0)
            {
                dgvPartlist.Rows.Clear();
                dgvPartlist.Rows.Add(dtView.Rows.Count);
                int i = 0;
                foreach (DataRow drow in dtView.Rows)
                {
                    //dgrdReciver.Rows[i].Cells["SerialNo"].Value = j;
                    dgvPartlist.Rows[i].Cells["Sl_No"].Value = drow["Sl_No"];
                    dgvPartlist.Rows[i].Cells["Description"].Value = drow["Description"];
                    dgvPartlist.Rows[i].Cells["Item"].Value = drow["Item"];
                    dgvPartlist.Rows[i].Cells["BEL_Part_No"].Value = drow["BEL_Part_No"];
                     i++;
                }

            }
        }