[程式] 解決UserControl閃爍

 

解決

Windows Form在執行後總會閃爍個好一陣子

方法一

1.設定DoubleBuffer=true，但效用似乎沒那麼大

 

方法二

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

只要在Form上加入 Or &H2000000即可有效果，UserControl可不需加入那一段Code!

參考:亂馬客