相关疑难解决方法(0)

在我的用户控件的绘图处理程序中,我遍历一组预定义的Bitmap对象,并将它们绘制到客户区:

C#版本:

private void Control_Paint(object sender, PaintEventArgs e) {
    Graphics g = e.Graphics;
    foreach (BitmapObj bmpObj in _bitmapObjCollection) {
        g.DrawImageUnscaled(bmpObj.Bitmap, bmpObj.Location);
    }
}

VB.NET版本:

Private Sub Control_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
    Dim g As Graphics = e.Graphics

    For Each bmpObj As BitmapObj In _bitmapObjCollection
        g.DrawImageUnscaled(bmpObj.Bitmap, bmpObj.Location)
    Next
End Sub

代码工作正常但是当十几个对象添加到集合时开始陷入困境.我的问题是:有没有办法加快速度？是否可以使用Win32 bitblt函数替换DrawImageUnscaled？如果是这样怎么样？

谢谢!

注意:到目前为止,谷歌搜索BitBlt的使用仅产生了我的屏幕截图样本......