SqlCommand 与 SqlDataAdapter

SqlConnection con = new SqlConnection("server=.;database=xxx;uid=sa;pwd=;");
string sqlstring = "select * from table";
con.open();
SqlCommand

SqlCommand cmd = new SqlCommand(sqlstring,con);
SqlDataReader dr = cmd.ExecuteReader();
dr做数据源
SqlDataAdapater
SqlDataAdapter da = new SqlDataAdapter(sqlstring,con);
DataSet ds = new DataSet();
da.Fill(ds,"table");
ds做数据源
也可以DataView做数据源 DataView dv = ds.Tables["table"].DefaultView;
存储过程
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "存储过程名";
cmd.CommandType= CommandType.StoredProcedre;
cmd.Parameters.Add("@xx", SqlDbType.NVarChar, 10).Value = DropList.SelectedItem.Text;

SqlDataReader dr = cmd.ExecuteReader();