很犀利的防止自定义的用户控件闪烁方法

最近在开发WinForm系统时，采用了大量的自定义用户控件，完全运用面向对象,采用领域驱动设计开发方式。这种方式前期工作就是开发大量的自定义用户控件，结果把这些控件放置在窗体上运行时，在切换界面发现有闪烁现象，控件越多，闪烁的越厉害。找了许久，终于找到了这个方法，很犀利，很有效。贴在这里。感谢原作者。

解决方式是在Form及UserControl上重写CreateParams，程式如下，

Form上的Code

C#

protected override CreateParams CreateParams {

get {

CreateParams cp = base.CreateParams;

cp.ExStyle |= 0x02000000;  // Turn on WS_EX_COMPOSITED

return cp;

}

}

VB

Protected Overrides ReadOnly Property CreateParams As System.Windows.Forms.CreateParams

Get

Dim cp As CreateParams = MyBase.CreateParams

cp.ExStyle = cp.ExStyle Or &H2000000

' Turn on WS_EX_COMPOSITED

Return cp

End Get

End Property

UserControl的Code

C#

protected override CreateParams CreateParams {

get {

var parms = base.CreateParams;

parms.Style &= ~0x02000000;  // Turn off WS_CLIPCHILDREN

return parms;

}

}

VB

Protected Overrides ReadOnly Property CreateParams As System.Windows.Forms.CreateParams

Get

Dim parms As System.Windows.Forms.CreateParams = MyBase.CreateParams

'Turn off WS_CLIPCHILDREN

parms.Style = (parms.Style And (Not &H2000000))

Return parms

End Get

End Property

參考資料:How
to fix the flickering in User controls