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Posted on
2007-04-17 22:32
xujh
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C# 画圆角矩形
protected void Page_Load(object sender, EventArgs e)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif) ![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif) {
Bitmap bm = new Bitmap(800, 600);
Graphics g = Graphics.FromImage(bm);
g.FillRectangle(Brushes.White,new Rectangle(0,0,800,600));
FillRoundRectangle(g,Brushes.Plum,new Rectangle(100, 100, 100, 100), 8);
DrawRoundRectangle(g, Pens.Yellow,new Rectangle(100, 100, 100, 100), 8);
bm.Save(Response.OutputStream, ImageFormat.Jpeg);
g.Dispose();
bm.Dispose();
}
public static void DrawRoundRectangle(Graphics g,Pen pen,Rectangle rect, int cornerRadius)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif) ![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif) {
using (GraphicsPath path = CreateRoundedRectanglePath(rect, cornerRadius))
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif) {
g.DrawPath(pen, path);
}
}
public static void FillRoundRectangle(Graphics g, Brush brush,Rectangle rect, int cornerRadius)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif) ![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif) {
using (GraphicsPath path = CreateRoundedRectanglePath(rect, cornerRadius))
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif) {
g.FillPath(brush, path);
}
}
internal static GraphicsPath CreateRoundedRectanglePath(Rectangle rect, int cornerRadius)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif) ![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif) {
GraphicsPath roundedRect = new GraphicsPath();
roundedRect.AddArc(rect.X, rect.Y, cornerRadius * 2, cornerRadius * 2, 180, 90);
roundedRect.AddLine(rect.X + cornerRadius, rect.Y, rect.Right - cornerRadius * 2, rect.Y);
roundedRect.AddArc(rect.X + rect.Width - cornerRadius * 2, rect.Y, cornerRadius * 2, cornerRadius * 2, 270, 90);
roundedRect.AddLine(rect.Right, rect.Y + cornerRadius * 2, rect.Right, rect.Y + rect.Height - cornerRadius * 2);
roundedRect.AddArc(rect.X + rect.Width - cornerRadius * 2, rect.Y + rect.Height - cornerRadius * 2, cornerRadius * 2, cornerRadius * 2, 0, 90);
roundedRect.AddLine(rect.Right - cornerRadius * 2, rect.Bottom, rect.X + cornerRadius * 2, rect.Bottom);
roundedRect.AddArc(rect.X, rect.Bottom - cornerRadius * 2, cornerRadius * 2, cornerRadius * 2, 90, 90);
roundedRect.AddLine(rect.X, rect.Bottom - cornerRadius * 2, rect.X, rect.Y + cornerRadius * 2);
roundedRect.CloseFigure();
return roundedRect;
}
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