controls in runtime

Question

我有一个文本框数组，我在运行时创建了20个文本框，如果一个特定的文本框，我需要获得焦点（如果我在键盘上按下downarrow，如何按下特定文本框的键，它可以是第三个文本框）。

Answer 1

You can add an Event-Handler to your KeyDown-Event:

yourTextboxArray[x].KeyDown += new KeyDownEventHandler(yourMethodHere);

The event has two parameters, sender (Object) and e (KeyDownEventArgs) . You can use the sender to determine what Textbox has send the KeyDown.

Textbox txb_sender = sender as Textbox;
if(txb_sender != null)
      // do something here with it