C#用GDI+解析Json文件绘制Chart
using System.Collections.Generic; namespace Chart { public class Program { static void Main(string[] args) { Chart chart = new Chart(); ChartType chartType = ChartType.Histogram; string path = @"..\..\JSON.json"; DataSource dataSource = new JsonDataSource(); List<Composition> Compositions = dataSource.GetDataList(path); chart.Compositions.AddRange(Compositions); chart.Draw(chartType); chart.Save(); } } }
using System; using System.Collections.Generic; using System.Diagnostics; using System.Drawing; namespace Chart { public class Chart { private Bitmap bmp = new Bitmap(600, 600); List<Composition> composition = new List<Composition>(); public List<Composition> Compositions { get { return composition; } } private float width; private float Width { get { int sum = 0; foreach (var composition in Compositions) { sum += composition.DataPoints.Count + 1; } width = (float)420 / sum; return width; } } public void Draw(ChartType chartType) { Series series; switch (chartType) { case ChartType.LineChart: series = new LineSeries(); break; case ChartType.Histogram: series = new HistogramSeries(); break; case ChartType.PieChart: series = new PieSeries(); break; default: throw new ArgumentOutOfRangeException("Nonexistent ChartType!"); } foreach (var comPosition in Compositions) { series.Legend.Add(comPosition.Name); } Platform platform = new Windows(bmp); series.Draw(Width, platform, Compositions); } public void Save() { bmp.Save(@"..\..\1.bmp"); Process.Start(@"..\..\1.bmp"); } } }
using System.Collections; using System.Collections.Generic; using System.Drawing; namespace Chart { public abstract class Series { ArrayList legend = new ArrayList(); public ArrayList Legend { get { return legend; } set { } } protected PointF PointFormLarge; protected PointF PointFormSmall; private void DrawChart(Platform g) { g.FillRectangle(g.WBrush, 20, 20, 580, 500); } protected abstract void DrawCore(float width, Platform g, List<Composition> Compositions); public void Draw(float width, Platform g, List<Composition> Compositions) { PointFormLarge = new PointF(width * Compositions.Count + width, 0); PointFormSmall = new PointF(width, 0); DrawChart(g); DrawCore(width, g, Compositions); } } }
using System.Collections.Generic; using System.Drawing; using System; namespace Chart { public class HistogramSeries : Series { private void DrawAxes(Platform g) { g.DrawLine(g.Rpen, new Point(100, 40), new Point(100, 420)); g.DrawLine(g.Rpen, new Point(100, 40), new Point(90, 50)); g.DrawLine(g.Rpen, new Point(100, 40), new Point(110, 50)); g.DrawLine(g.Rpen, new Point(100, 420), new Point(570, 420)); g.DrawLine(g.Rpen, new Point(570, 420), new Point(560, 410)); g.DrawLine(g.Rpen, new Point(570, 420), new Point(560, 430)); g.DrawString("月考成绩", g.LargeFont, g.Bbrush, new RectangleF(300, 30, 170, 50)); g.DrawString("科目", g.LargeFont, g.Bbrush, new RectangleF(530, 450, 100, 40)); g.DrawString("成绩", g.LargeFont, g.Bbrush, new RectangleF(40, 30, 40, 40)); for (int i = 0; i < 5; i++) { g.DrawLine(g.BlackPen, new Point(100, 60 + 72 * i), new Point(570, 60 + 72 * i)); } } private void DrawLegend(Platform g) { int LegendWidth = 250 / (Legend.Count - 1); int StringX = 50; int LegendX = StringX + 60; int k = 0; foreach (string legend in Legend) { switch (k) { case 0: g.Brush = Brushes.Blue; break; case 1: g.Brush = Brushes.Red; break; case 2: g.Brush = Brushes.Yellow; break; case 3: g.Brush = Brushes.Green; break; } g.DrawString(legend, g.LargeFont, Brushes.Blue, StringX, 480); Rectangle rect = new Rectangle(LegendX, 480, LegendWidth * 2 / 3, 20); g.FillRectangle(g.Brush, rect); StringX += 550 / Legend.Count; LegendX = StringX + 60; k++; } } protected override void DrawCore(float width, Platform g, List<Composition> Compositions) { DrawAxes(g); DrawLegend(g); foreach (var datapoint in Compositions[0].DataPoints) { g.DrawString(datapoint.XValue, g.LargeFont, g.Bbrush, 120, 430); g.TranslateTransform(PointFormLarge.X, PointFormLarge.Y); } g.ResetTransform(); int YValueMax = 0; foreach (var composition in Compositions) { if (YValueMax <= composition.Max) { YValueMax = composition.Max; } } g.YRatioScale = 370 / YValueMax; for (int i = 0; i <= 5; i++) { g.DrawString(Math.Ceiling(360/5/ g.YRatioScale*(5-i)).ToString(), g.LargeFont, g.BlackBrush, new RectangleF(80, 50 + 72 * i, 50, 50)); } void DrawRectangle(float x, float y, float Width, float height, Composition composition) { Rectangle rect = new Rectangle((int)x, (int)y, (int)width, (int)height); g.FillRectangle(composition.BrushColor, rect); } int j = 1; foreach (var composition in Compositions) { Compositions[0].BrushColor = Brushes.Blue; Compositions[1].BrushColor = Brushes.Red; Compositions[2].BrushColor = Brushes.Yellow; foreach (var datapoint in composition.DataPoints) { DrawRectangle(120, 420 - datapoint.YValue * g.YRatioScale, width, datapoint.YValue * g.YRatioScale, composition); g.DrawString(datapoint.YValue.ToString(), g.SmallFont, Brushes.Red, 120, 420 - datapoint.YValue * g.YRatioScale - 15); g.TranslateTransform(PointFormLarge.X, PointFormLarge.Y); } g.ResetTransform(); for (int i = 0; i < j; i++) { g.TranslateTransform(PointFormSmall.X, PointFormSmall.Y); } j++; } g.ResetTransform(); } } }
using System.Drawing; namespace Chart { public abstract class Platform { public abstract void FillRectangle(Brush b, int x, int y, int width, int height); public abstract void DrawLine(Pen pen, Point pt1, Point pt2); public abstract void DrawString(string s, Font font, Brush brush, RectangleF layoutRectangle); public abstract void DrawString(string s, Font font, Brush brush, float x, float y); public abstract void FillRectangle(Brush brush, Rectangle rect); public abstract void TranslateTransform(float dx, float dy); public abstract void ResetTransform(); private Brush wbrush = Brushes.White; private Brush bbrush = Brushes.Blue ; private Brush blackBrush = Brushes.Black; private Brush brush ; Pen rpen = new Pen(Color.Red, 3); Pen blackPen = new Pen(Color .Black ,1); Font largeFont = new Font("黑体", 12); Font smallFont = new Font("黑体", 8); private float yRatioScale; public Brush WBrush { get => wbrush; set => wbrush = value; } public Pen Rpen { get => rpen; set => rpen = value; } public Font LargeFont { get => largeFont; set => largeFont = value; } public Font SmallFont { get => smallFont; set => smallFont = value; } public Brush Bbrush { get => bbrush; set => bbrush = value; } internal float YRatioScale { get => yRatioScale; set => yRatioScale = value; } public Brush Brush { get => brush; set => brush = value; } public Pen BlackPen { get => blackPen; set => blackPen = value; } public Brush BlackBrush { get => blackBrush; set => blackBrush = value; } } }
using System.Drawing; namespace Chart { public class Windows : Platform { private readonly Graphics graphics; public Windows(Bitmap bmp) { graphics = Graphics.FromImage(bmp); } public override void FillRectangle(Brush b, int x, int y, int width, int height) { graphics.FillRectangle(b, x, y, width, height); } public override void DrawLine(Pen pen, Point pt1, Point pt2) { graphics.DrawLine(pen, pt1, pt2); } public override void DrawString(string s, Font font, Brush brush, RectangleF layoutRectangle) { graphics.DrawString(s, font, brush, layoutRectangle); } public override void DrawString(string s, Font font, Brush brush, float x, float y) { graphics.DrawString(s, font, brush, x, y); } public override void FillRectangle(Brush brush, Rectangle rect) { graphics.FillRectangle(brush, rect); } public override void TranslateTransform(float dx, float dy) { graphics.TranslateTransform(dx, dy); } public override void ResetTransform() { graphics.ResetTransform(); } } }
using System.Collections.Generic; using System.Drawing; namespace Chart { public class Composition { private List<DataPoint> dataPoints; private string name; private Brush brushColor; private int max; public List<DataPoint> DataPoints { get => dataPoints; set => dataPoints = value; } public string Name { get => name; set => name = value; } public Brush BrushColor { get => brushColor; set => brushColor = value; } public int Max //Linq中提供的计算List最大值的方法是集合中的元素即为可比较的数值类型，DataPoint不是，所以这里的方法自定义 { get { foreach (var datapoint in DataPoints) { if (datapoint.YValue >= max) { max = datapoint.YValue; } } return max; } } } }
namespace Chart { public class DataPoint { private string xValue; private int yValue; public int YValue { get => yValue; set => yValue = value; } public string XValue { get => xValue; set => xValue = value; } } }
using System.Collections.Generic; using System.IO; namespace Chart { public abstract class DataSource { protected abstract List<Composition> GetDataListCore(string path); public List<Composition> GetDataList(string path) { if (!File.Exists(path)) { throw new FileNotFoundException(path); } return GetDataListCore(path); } } }
using Newtonsoft.Json; using System.Collections.Generic; using System.IO; namespace Chart { public class JsonDataSource : DataSource { protected override List<Composition> GetDataListCore(string path) { return JsonConvert.DeserializeObject<List<Composition>>(File.ReadAllText(path)); } } }
[ { "Name": "Molly", "DataPoints": [ { "XValue": "English", "YValue": 2 }, { "XValue": "Chinese", "YValue": 6 }, { "XValue": "Math", "YValue": 7 }, { "XValue": "Art", "YValue": 7 } ] }, { "Name": "Bob", "DataPoints": [ { "XValue": "English", "YValue": 9 }, { "XValue": "Math", "YValue": 12 }, { "XValue": "Art", "YValue": 3 }, { "XValue": "Chinese", "YValue": 3 } ] }, { "Name": "Angela", "DataPoints": [ { "XValue": "English", "YValue": 5 }, { "XValue": "Math", "YValue": 13 }, { "XValue": "Art", "YValue": 9 }, { "XValue": "Chinese", "YValue": 6 } ] } ]
以下附上这个程序设计的UML类图
https://www.processon.com/view/link/5b4dbd93e4b00b08ad2085d7
