解决C# WinForm Graphics绘制闪烁问题

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不直接使用form的CreateGraphics创建Graphics进行绘制，可以先在Form上面放一个需要大小的PictureBox，再创建一个同大小的Bitmap，将这个Bitmap设置为PictureBox的Image。再在这个Bitmap上进行绘制，这样拖动resize之类就不会闪烁了。

代码片段：

PictureBox ImageBox = null;
Bitmap RenderTarget = null;Size RenderSize = new Size();

public RenderForm()
{
InitializeComponent(); ImageBox = new PictureBox();
ImageBox.Size = Properties.Resources.background.Size;
ImageBox.Parent = this; renderSize = new Size(StatTools.Properties.Resources.background.Width, StatTools.Properties.Resources.background.Height);
}public Size renderSize
{
get { return RenderSize; }
set
{
if(RenderTarget == null || RenderTarget.Width != value.Width || RenderTarget.Height != value.Height)
{
RenderTarget = null;
RenderTarget = new Bitmap(value.Width, value.Height); ImageBox.Size = new Size(value.Width, value.Height);
ImageBox.Image = RenderTarget;
} RenderSize = value;
}
}private void RenderForm_Paint(object sender, PaintEventArgs e)
{
if( CurrentRender != null )
{
var GFX = Graphics.FromImage(RenderTarget);
CurrentRender.OnDraw(GFX, renderSize.Width, renderSize.Height);
}
}