c# - .Net 形式焦点

Question

我有一个包含多个控件的 .net 表单。文本框、标签...当表单显示在屏幕上时，文本框默认获得焦点。当我尝试使用鼠标滚轮滚动表单时，滚动消息基本上会转到文本框，因此表单不会滚动..

我试过设置

textbox.capture = false
form.capture = true; 
form.focus();

但似乎没有什么能把注意力从文本框上移开。关于如何强制表单获取鼠标事件而不是它的控件的任何线索？？

Answer 1

MSDN documentation对于 Control.Focus() 状态:

[...]

A control can be selected and receive input focus if all the following are true: the Selectable value of ControlStyles is set to true, it is contained in another control, and all its parent controls are both visible and enabled.

The Windows Forms controls in the following list are not selectable. Controls derived from these controls are also not selectable.

• Panel
• GroupBox
• PictureBox
• ProgressBar
• Splitter
• Label
• LinkLabel (when there is no link present in the control)

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NoteNote:

Focus is a low-level method intended primarily for custom control authors. Instead, application programmers should use the Select method or the ActiveControl property for child controls, or the Activate method for forms.

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