how to add datagridview detail in access table

I'm creating a medical store application, with textboxes and one datagridview (see image below of my form). When a user clicks the add button, I want all textbox values and datagridview values to be inserted into database. Also I want from particular reg no.(which is primary key) patient name and if he choose multiple medicine that also retrieve by using search option.

private void btnadd_Click(object sender, EventArgs e)

{

string connectionString = null;

connectionString = ConfigurationManager.ConnectionStrings["AccessConnectionString"].ConnectionString;

con.ConnectionString = connectionString;

string SqlString = "insert into Medical_Information ([Reg_No],[Date],[Name],[Doctor_name],[Address],[Quantity],[Medicine_name],[Current_Available],[Manufacture_Name],[Batch_No],[Expiry_Date],[Rupees],[Total]) values(?,?,?,?,?,?,?,?,?,?,?,?,?,?)";

using (cmd = new OleDbCommand(SqlString, con))

{

con.Open();

cmd.CommandType = CommandType.Text;

cmd.Parameters.AddWithValue("@Reg_No", lblregno.Text);

cmd.Parameters.AddWithValue("@Date", DateTime.Parse(msktextdate.Text));

cmd.Parameters.AddWithValue("@Name", txtname.Text);

cmd.Parameters.AddWithValue("@Doctor_name", txtdoctorname.Text);

cmd.Parameters.AddWithValue("@Address", txtaddress.Text);

foreach (DataGridViewRow dvgvr in dataGridView1.Rows)

{

int Quantity;

int selectedRowIndex = 6;

bool quanity1 = int.TryParse(dataGridView1.Rows[selectedRowIndex].Cells["Quantity"].Value.ToString(), out Quantity);

cmd.Parameters.AddWithValue("@Quantity", quanity1);

string Medicine_name = dataGridView1.Rows[7].Cells["Medicine_name"].Value.ToString();

cmd.Parameters.AddWithValue("@Medicine_name", Medicine_name);

int Current_Available;

bool Current_Available1 = int.TryParse(dataGridView1.Rows[8].Cells["Current_Available"].Value.ToString(), out Current_Available);

cmd.Parameters.AddWithValue("@Current_Available", Current_Available1);

string Manufacture_Name = dataGridView1.Rows[9].Cells["Manufacture_Name"].Value.ToString();

cmd.Parameters.AddWithValue("@Manufacture_Name", Manufacture_Name);

string Batch_No = dataGridView1.Rows[10].Cells["Batch_No"].Value.ToString();

cmd.Parameters.AddWithValue("@Batch_No", Batch_No);

DateTime datetime;

bool dateTimeHasValue = DateTime.TryParse(dataGridView1.Rows[11].Cells["Expiry_Date"].Value.ToString(), out datetime);

cmd.Parameters.AddWithValue("@Expiry_Date", datetime);

int Rupees;

bool Rupees1 = int.TryParse(dataGridView1.Rows[12].Cells["Rupees"].Value.ToString(), out Rupees);

cmd.Parameters.AddWithValue("@Rupees", Rupees1);

int Total;

bool Total1 = int.TryParse(dataGridView1.Rows[13].Cells["Total"].Value.ToString(), out Total);

cmd.Parameters.AddWithValue("@Total", Total1);

}

int n = cmd.ExecuteNonQuery();

con.Close();

if (n > 0)

{

MessageBox.Show("Data Inserted Successfully", "Data Inserted ", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

}

}