SqlDataAdapter的update不能将数据更新进数据库?
SqlConnection conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["DbConn"]);
SqlDataAdapter catDA=new SqlDataAdapter(cmdtext,conn);
SqlCommandBuilder cb=new SqlCommandBuilder(catDA);
DataSet catDS=new DataSet();
conn.Open();
catDA.Fill(catDS,"GRXX");
///更改数据
catDA.Update(catDS,"GRXX");
conn.Close();
以上的更改数据不能更新进sqlserver数据库?