Values Are Not Getting Stored From Combo box to Data Base

I have a combo box named cmbboxreceivedby, from this combobox i m selecting a value, but the selected value is not stored in the data base.

it shows System.Data.DataRowView. here is the print screen of data base

 

 

and here is my code 

 

private void cmbboxreceivedby_SelectedIndexChanged(object sender, EventArgs e)
{

name = cmbboxreceivedby.SelectedItem.ToString();
}

private void btnadddonor_Click(object sender, EventArgs e)
{
if (txtaddress.Text == "" || txtcontactnum.Text == "" || txtmessage.Text == "" || txtpatientage.Text == "" || txtpatientname.Text == "" || txtpreviousdonors.Text == "")
{
MessageBox.Show("Fields Cannot Be Left Empty", "Error..!!", MessageBoxButtons.OK, MessageBoxIcon.Error);

}
else
{

SqlConnection coonn = new SqlConnection(con);
SqlCommand sqlcmd = new SqlCommand("insert into Donors (Name,Address,Sex,MobileNum,BloodGroup,ReceivedBy,Comments,PreviousDonors) values (@name,@add,@sex,@mblnum,@bldgrp,@rcvdby,@cmt,@prvsdnrs)", coonn);
sqlcmd.Parameters.Add(new SqlParameter("@name", txtpatientname.Text));
sqlcmd.Parameters.Add(new SqlParameter("@add", txtaddress.Text));
sqlcmd.Parameters.Add(new SqlParameter("@sex", comboBoxGender.SelectedItem.ToString()));
sqlcmd.Parameters.Add(new SqlParameter("@mblnum", txtcontactnum.Text));
sqlcmd.Parameters.Add(new SqlParameter("@bldgrp", comboxbldgrp.SelectedItem));
sqlcmd.Parameters.Add(new SqlParameter("@rcvdby", name));
sqlcmd.Parameters.Add(new SqlParameter("@cmt", txtmessage.Text));
sqlcmd.Parameters.Add(new SqlParameter("@prvsdnrs", txtpreviousdonors.Text));
SqlCommand sqlcmd2 = new SqlCommand("update [BloodStock] set [Quantity] = Quantity + 1 where Blood_Group = @blood_group", coonn);
sqlcmd2.Parameters.Add(new SqlParameter("@blood_group", comboxbldgrp.SelectedItem));
coonn.Open();
sqlcmd.ExecuteNonQuery();
sqlcmd2.ExecuteNonQuery();
coonn.Close();
coonn.Dispose();
MessageBox.Show("Donor Added", "Successful", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
} 

 

please help..