有人可以指導我如何在GDI中創建形狀+

-3

我對GDI +相當陌生，想知道是否有人可以指導我如何在C＃GDI +中創建此形狀。我在下面包含了我的代碼，目前我只是使用一個圖像，但我寧願只畫一個圖像。有人可以指導我如何在GDI中創建形狀+

我用這個作爲參考：

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); 
    }

來源

2016-05-18 Cyberdrew

你試過畫一個圓圈嗎？那裏有很多例子。一旦你有了這些，最上面的部分只是做一些數學問題，並在其上面繪製一個多邊形。如果你想要一個空心的話，它只會變得複雜。 –

我提到這個是因爲我們需要代碼來幫助你。 http://stackoverflow.com/help/mcve –

如果可能，我寧願將它繪製成一個形狀。 – Cyberdrew

GraphicsPath.AddPie + AddLine + AddLine + CloseFigure取決於你PARAMS。

來源

2016-05-18 20:33:45

有人可以指導我如何在GDI中創建形狀+

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