... Constraint––CCááccllớớppđđặặccbibiệệtt: : SqlCommandSqlCommand, , OleDbCommandOleDbCommand, , SqlCommandBuilderSqlCommandBuilder, , OleDbCommandBuilderOleDbCommandBuilder, , SqlConnectionSqlConnection, ... new = new SqlConnection(sourceSqlConnection(source););SqlCommandSqlCommandcmdcmd= new = new SqlCommand(selectSqlCommand(select, , connconn););SqlDataAdapterSqlDataAdapteradapter ... -- Editor Editor: : ĐoĐoààn Quang Minhn Quang Minh33Errors and Exception HandlingErrors and Exception HandlingLLỗỗi luôn luôn ti luôn luôn tồồn tn tạại, cho di, cho...