数据操作1——command

if(!Page.IsPostBack)   {    SqlConnection conn = new SqlConnection(con);    conn.Open();

    string strSql = "insert into 公告 (标题,内容) values ('这是标题','这是内容')";    SqlCommand cm = new SqlCommand(strSql,conn);

    cm.ExecuteNonQuery();

    conn.Close();   }