这篇文章给大家介绍C#中怎么利用GDI酷绘制一个雷达图，内容非常详细，感兴趣的小伙伴们可以参考借鉴，希望对大家能有所帮助。
坚守“ 做人真诚 · 做事靠谱 · 口碑至上 · 高效敬业 ”的价值观，专业网站建设服务10余年为成都成都酒楼设计小微创业公司专业提供企业网站制作营销网站建设商城网站建设手机网站建设小程序网站建设网站改版，从内容策划、视觉设计、底层架构、网页布局、功能开发迭代于一体的高端网站建设服务。
代码如下：
public static class RadarDemo { static float mW = 1200; static float mH = 1200; static Dictionary mData = new Dictionary { //{ "速度",77}, { "力量", 72}, { "防守", 110}, { "射门", 50}, { "传球", 80}, { "耐力", 60 } };//维度数据 static float mCount = mData.Count; //边数 static float mCenter = mW * 0.5f; //中心点 static float mRadius = mCenter - 100; //半径(减去的值用于给绘制的文本留空间) static double mAngle = (Math.PI * 2) / mCount; //角度 static Graphics graphics = null; static int mPointRadius = 5; // 各个维度分值圆点的半径 static int textFontSize = 18; //顶点文字大小 px const string textFontFamily = "Microsoft Yahei"; //顶点字体 static Color lineColor = Color.Green; static Color fillColor = Color.FromArgb(128, 255, 0, 0); static Color fontColor = Color.Black; public static void Show() { Bitmap img = new Bitmap((int)mW, (int)mH); graphics = Graphics.FromImage(img); graphics.Clear(Color.White); img.Save($"{AppDomain.CurrentDomain.BaseDirectory}radar/0.png", ImageFormat.Png); DrawPolygon(graphics); img.Save($"{AppDomain.CurrentDomain.BaseDirectory}radar/1.png", ImageFormat.Png); DrawLines(graphics); img.Save($"{AppDomain.CurrentDomain.BaseDirectory}radar/2.png", ImageFormat.Png); DrawText(graphics); img.Save($"{AppDomain.CurrentDomain.BaseDirectory}radar/3.png", ImageFormat.Png); DrawRegion(graphics); img.Save($"{AppDomain.CurrentDomain.BaseDirectory}radar/4.png", ImageFormat.Png); DrawCircle(graphics); img.Save($"{AppDomain.CurrentDomain.BaseDirectory}radar/5.png", ImageFormat.Png); img.Dispose(); graphics.Dispose(); } // 绘制多边形边 private static void DrawPolygon(Graphics ctx) { var r = mRadius / mCount; //单位半径 Pen pen = new Pen(lineColor); //画6个圈 for (var i = 0; i < mCount; i++) { var points = new List(); var currR = r * (i + 1); //当前半径 //画6条边 for (var j = 0; j < mCount; j++) { var x = (float)(mCenter + currR * Math.Cos(mAngle * j)); var y = (float)(mCenter + currR * Math.Sin(mAngle * j)); points.Add(new PointF { X = x, Y = y }); } ctx.DrawPolygon(pen, points.ToArray()); //break; } ctx.Save(); } //顶点连线 private static void DrawLines(Graphics ctx) { for (var i = 0; i < mCount; i++) { var x = (float)(mCenter + mRadius * Math.Cos(mAngle * i)); var y = (float)(mCenter + mRadius * Math.Sin(mAngle * i)); ctx.DrawLine(new Pen(lineColor), new PointF { X = mCenter, Y = mCenter }, new PointF { X = x, Y = y }); //break; } ctx.Save(); } //绘制文本 private static void DrawText(Graphics ctx) { var fontSize = textFontSize;//mCenter / 12; Font font = new Font(textFontFamily, fontSize, FontStyle.Regular); int i = 0; foreach (var item in mData) { var x = (float)(mCenter + mRadius * Math.Cos(mAngle * i)); var y = (float)(mCenter + mRadius * Math.Sin(mAngle * i) - fontSize); if (mAngle * i > 0 && mAngle * i <= Math.PI / 2) { ctx.DrawString(item.Key, font, new SolidBrush(fontColor), x - ctx.MeasureString(item.Key, font).Width * 0.5f, y + fontSize/* y + fontSize*/); } else if (mAngle * i > Math.PI / 2 && mAngle * i <= Math.PI) { ctx.DrawString(item.Key, font, new SolidBrush(fontColor), x - ctx.MeasureString(item.Key, font).Width, y /*y + fontSize*/); } else if (mAngle * i > Math.PI && mAngle * i <= Math.PI * 3 / 2) { ctx.DrawString(item.Key, font, new SolidBrush(fontColor), x - ctx.MeasureString(item.Key, font).Width, y); } else if (mAngle * i > Math.PI * 3 / 2) { ctx.DrawString(item.Key, font, new SolidBrush(fontColor), x - ctx.MeasureString(item.Key, font).Width * 0.5f, y - fontSize * 0.5f); } else { ctx.DrawString(item.Key, font, new SolidBrush(fontColor), x, y /* y + fontSize*/); } i++; } ctx.Save(); } //绘制数据区域 private static void DrawRegion(Graphics ctx) { int i = 0; List points = new List(); foreach (var item in mData) { var x = (float)(mCenter + mRadius * Math.Cos(mAngle * i) * item.Value / 100); var y = (float)(mCenter + mRadius * Math.Sin(mAngle * i) * item.Value / 100); points.Add(new PointF { X = x, Y = y }); //ctx.DrawArc(new Pen(lineColor), x, y, r, r, 0, (float)Math.PI * 2); i++; } //GraphicsPath path = new GraphicsPath(); //path.AddLines(points.ToArray()); ctx.FillPolygon(new SolidBrush(fillColor), points.ToArray()); ctx.Save(); } //画点 private static void DrawCircle(Graphics ctx) { //var r = mCenter / 18; var r = mPointRadius; int i = 0; foreach (var item in mData) { var x = (float)(mCenter + mRadius * Math.Cos(mAngle * i) * item.Value / 100); var y = (float)(mCenter + mRadius * Math.Sin(mAngle * i) * item.Value / 100); ctx.FillPie(new SolidBrush(fillColor), x - r, y - r, r * 2, r * 2, 0, 360); //ctx.DrawArc(new Pen(lineColor), x, y, r, r, 0, (float)Math.PI * 2); i++; } ctx.Save(); } }
关于C#中怎么利用GDI酷绘制一个雷达图就分享到这里了，希望以上内容可以对大家有一定的帮助，可以学到更多知识。如果觉得文章不错，可以把它分享出去让更多的人看到。
当前标题：C#中怎么利用GDI酷绘制一个雷达图
文章路径：
http://cdxtjz.cn/article/gcsepd.html
