Question

我对GDI +相当新，并且想知道是否有人可以指导我如何在C＃GDI +中创建这个形状。我在下面包含了我的代码，目前我只使用了一个图像，但我更愿意只是绘制它。

我用这个作为参考：

public static byte[] RangeGauge(GaugeData data, int size, ImageFormat format)
        {
            var min = data.Ranges.Min(t => t.MinValue);
            var max = data.Ranges.Max(t => t.MaxValue);
            var rangeTotal = max - min;
            var value = data.Value;
            var valueAngle = (((value - min) / rangeTotal) * 270) + 135;
            using (var bmp = new Bitmap(500, 500))
            {
                bmp.SetResolution(300, 300);
                using (var g = Graphics.FromImage(bmp))
                {
                    g.SmoothingMode = SmoothingMode.HighQuality;
                    g.InterpolationMode = InterpolationMode.HighQualityBilinear;
                    g.PixelOffsetMode = PixelOffsetMode.HighQuality;
                    var rec = new Rectangle(0, 0, 500, 500);
                    g.FillPie(new SolidBrush(Color.White), rec, 45, 90);
                    var startDeg = 135f;
                    foreach (var item in data.Ranges.OrderBy(o => o.MinValue))
                    {
                        g.FillPie(new SolidBrush(item.TrueColor), rec, startDeg, (float)(((item.MaxValue - item.MinValue) / rangeTotal) * 270));
                        startDeg = (float)(startDeg + (((item.MaxValue - item.MinValue) / rangeTotal) * 270));
                    }
                    g.FillEllipse(new SolidBrush(Color.White), new Rectangle(125, 125, 250, 250));
                    //HERE is where I would rather draw needle
                    using (var needle = Graphics.FromImage(bmp))
                    {
                        needle.TranslateTransform(250, 250);
                        needle.RotateTransform((float)valueAngle);
                        needle.TranslateTransform(-105, -105);
                        var myAssembly = Assembly.GetExecutingAssembly();
                        var myStream = myAssembly.GetManifestResourceStream("LoggingService.Needle.png");
                        needle.DrawImage(Image.FromStream(myStream), new PointF(0, 0));
                    }
                    g.FillEllipse(new SolidBrush(Color.White), new Rectangle(175, 175, 150, 150));
                    var sf = new StringFormat
                    {
                        Alignment = StringAlignment.Center,
                        LineAlignment = StringAlignment.Center
                    };
                    g.TextRenderingHint = TextRenderingHint.AntiAlias;
                    g.DrawString(value.ToString(), new Font(new FontFamily("Impact"), 18, FontStyle.Regular), new SolidBrush(Color.Black),
                        new PointF(250, 250), sf);
                    g.DrawString(data.Label, new Font(new FontFamily("Impact"), 12, FontStyle.Regular), new SolidBrush(Color.Black),
                        new PointF(250, 425), sf);
                }
                using (var ms = new MemoryStream())
                {
                    if (size == 500)
                    {
                        bmp.Save(ms, format);
                        return ms.ToArray();
                    }
                    var newBmp = new Bitmap(bmp, size, size);
                    bmp.SetResolution(300, 300);
                    newBmp.Save(ms, format);
                    return ms.ToArray();
                }
            }
        }
    public class GaugeData
    {
        public Range[] Ranges { get; set; }
        public double Value { get; set; }
        public string Label { get; set; }
    }
    public class Range
    {
        public double MinValue { get; set; }
        public double MaxValue { get; set; }
        public string Color { get; set; }
        internal Color TrueColor => (Color) new ColorConverter().ConvertFromString(Color);
    }

Answer 1

GraphicsPath.AddPie + AddLine + AddLine + CloseFigure取决于您的参数。

有人可以指导我如何在GDI +中创建一个形状

1 个答案: