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3550
How to make line chart?
posted

I want a 2D line chart for a list of points with x, y values.

I want 1 line, that goes threw the points, but I get 4 lines, 1 for each point.

I want the points to be in the right place, according to their numerical value. So that (1,1) point

Will be in 1 on x axis, 1 on y axis,  and (7,9)  point Will be in 7 on x axis, 9 on y axis.

I have this code.

List<Point> pointLs = new List<Point>();
            pointLs.Add(new Point(1,1));
            pointLs.Add(new Point(2, 4));
            pointLs.Add(new Point(7, 9));
            pointLs.Add(new Point(12, 20));
            ultraChart1.DataSource = pointLs;
            this.ultraChart1.DataBind(); 

public class Point {
        public Point(double x, double y) {
            mX = x;
            mY = y;
        }
        private double mX;

        private double mY;

        public double Y
        {
            get { return mY; }
            set { mY = value; }
        }

        public double X
        {
            get { return mX; }
            set { mX = value; }
        }
       
    }    


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  • 17605
    posted

    Sorry, I didn’t see that you want x and y numeric values (scatter chart).

    Try this code:

            private void Form1_Load(object sender, EventArgs e)

            {

                this.ultraChart1.ChartType = ChartType.ScatterChart;

                this.ultraChart1.ScatterChart.ConnectWithLines = true;

                this.ultraChart1.ScatterChart.LineAppearance.SplineTension = 0;

     

                List<Point> pointLs = new List<Point>();

                pointLs.Add(new Point("a", 1, 1));

                pointLs.Add(new Point("b", 2, 4));

                pointLs.Add(new Point("c", 7, 9));

                pointLs.Add(new Point("d", 12, 20));

     

                ultraChart1.DataSource = pointLs;

     

                this.ultraChart1.DataBind();

            }

     

            public class Point

            {

                public Point(string label, double x, double y)

                {

                    this.Label = label;

                    mX = x;

                    mY = y;

                }

     

                private string label;

                private double mX;

                private double mY;

     

                public string Label

                {

                    get { return label; }

                    set { label = value; }

                }

     

                public double X

                {

                    get { return mX; }

                    set { mX = value; }

                }

     

                public double Y

                {

                    get { return mY; }

                    set { mY = value; }

                }

            }

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