覆盖OnPaint [英] Override OnPaint

问题描述

如果我重写OnPaint并在控件上绘制一个正方形，当我在设计器中预览它时如何显示e.graphics.draw ...？

If I override OnPaint and draw a square on the control, how do I get that e.graphics.draw... to show up when I'm previewing it in the designer?

推荐答案

http：/ /msdn.microsoft.com/zh-CN/magazine/cc164048.aspx

http://msdn.microsoft.com/zh-CN/magazine/cc164145.aspx

虽然您可以手动向
Control.OnPaint注册以添加设计
时间UI，但您会发现覆盖
OnPaintAdornments是一个更好的选择
是因为仅在
控件的设计时/运行时UI绘制了
之后才调用它，让您为
锦上添花（请参见图20）。只需
将DesignerAttribute添加到
ClockControl类即可完成
关联：复制代码

While you could manually register with Control.OnPaint to add your design time UI, you'll find that overriding OnPaintAdornments is a better option because it is only called after the control's design-time/run-time UI is painted, letting you put the icing on the cake (see Figure 20). Simply adding DesignerAttribute to the ClockControl class completes the association: Copy Code

[
Designer（typeof（ClockControlDesigner ））
]类ClockControl：控件{...}

[ Designer(typeof(ClockControlDesigner)) ] class ClockControl : Control { ... }

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