慕码人8056858
这是最受接受的代码的无闪烁版本，您可以找到该问题的答案。所有这些都归功于这些致命答案的发布者。感谢Dusty，Chris，Matt和Josh！就像其中一个评论中“ Fueled”的请求一样，我还需要一个表现得更...专业的版本。此代码与以前的代码一样保留样式，但是添加了屏幕外图像渲染和图形缓冲（并正确处理了图形对象）。结果：一切正常，没有闪烁。:)public class NewProgressBar : ProgressBar{ public NewProgressBar() { this.SetStyle(ControlStyles.UserPaint, true); } protected override void OnPaintBackground(PaintEventArgs pevent) { // None... Helps control the flicker. } protected override void OnPaint(PaintEventArgs e) { const int inset = 2; // A single inset value to control teh sizing of the inner rect. using (Image offscreenImage = new Bitmap(this.Width, this.Height)) { using (Graphics offscreen = Graphics.FromImage(offscreenImage)) { Rectangle rect = new Rectangle(0, 0, this.Width, this.Height); if (ProgressBarRenderer.IsSupported) ProgressBarRenderer.DrawHorizontalBar(offscreen, rect); rect.Inflate(new Size(-inset, -inset)); // Deflate inner rect. rect.Width = (int)(rect.Width * ((double)this.Value / this.Maximum)); if (rect.Width == 0) rect.Width = 1; // Can't draw rec with width of 0. LinearGradientBrush brush = new LinearGradientBrush(rect, this.BackColor, this.ForeColor, LinearGradientMode.Vertical); offscreen.FillRectangle(brush, inset, inset, rect.Width, rect.Height); e.Graphics.DrawImage(offscreenImage, 0, 0); offscreenImage.Dispose(); } } }}