何為Dispatch Sources簡單來說,dispatch source是一個監視某些類型事件的對象。當這些事件發生時,它自動將一個block放入一個dispatch queue的執行常式中。說的貌似有點不清不楚。我們到底討論哪些事件類型?下面是GCD 10.6.0版本支援的事件:Mach port send right state changes.Mach port receive right state changes.External process state
updated on 2007/8/14對於smartNavigation屬性也許大家都瞭解了,它的主要作用是,記住web頁面的當前滾動位置,當頁面提交後重新回到當前位置,而不是回到web的最上邊.這對於有大資料且無翻頁處理的DataGrid是有好處的. 因為客戶在對DataGrid進行編輯時,如果DataGrid沒有分頁,那麼經提交返回後,要編輯的條目就跳出了使用者的視線,總是一種缺憾.設定smartNavigation有三種方法:1. 在需要設定的頁面的Page指令裡添加:
// -----------------------------------------------------------------------------// help menu avkon//在CHelpView::ConstructL()函數中調用// -----------------------------------------------------------------------------RESOURCE AVKON_VIEW r_help_menu{ menub
Cluster operation mode is very important. Unicast mode means that NLB takes over the network card it is bound to and doesn’t allow any additional network traffic through it. This is the reason why two adapters are a good idea – one that NLB can take
Material:Zoning is an FC switch function that enables nodes within the fabric to be logically segmented into groups that can communicate with each other.A zone set is a set of zones and a zone is a set of members.A member may be in multiple
Work:VPLEX===================EMC VPLEX is the next-generation solution for block-level virtualization and data mobility within, across, and between data centers. EMC VPLEX provides storage federation by aggregating storage arrays that can be
Work:Apart from zoning and LUN masking, additional security mechanisms such as port binding, port lockdown, port lockout, and persistent port disable can be implemented on switch ports.Port binding limits the number of devices that can attach to a