grid view

[C# Programming]

string connection2=ConfigurationManager .AppSettings ["conn"];
OleDbConnection con2 = new OleDbConnection(connection2);
OleDbDataAdapter da_detail = new OleDbDataAdapter();
DataSet ds_detail = new DataSet();
con2.Open();
string query = "select * from DOCTORFORM where NAME = '" + DropDownList1.SelectedItem.Value + "' ";
OleDbCommand pay_cmd2 = new OleDbCommand(query,con2);

da_detail.SelectCommand = pay_cmd2;
da_detail.Fill(ds_detail ,"details");
DataTable detail_dt=ds_detail .Tables ["details"];
GridView1.DataSource = detail_dt;
GridView1.DataBind();


this is how am getting the values into gridview.is there any other way without doing databind.