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i have a c program attached to gdb debugger for which created gui interface in windows form application. when i run the application debugging watch variable, i will get the following output in the richtextbox of form1
old value = 0
new value = 118
now i have to plot graph indicating this so i extracted lines from the richtextbox of form 1 interfaced to form2 through class file. and in form2 i split these lines collecting string and values in two arrays binding it to chart. but i am not able to make it apt so i need help. below is the code that i have tried.

What I have tried:

namespace flowchart_new
    public partial class Form2 : Form

        public Form2()

        private void Form2_Load(object sender, EventArgs e)
            string[] array = Class1.temparray;

            var data = Getdata(array);
            var chart = chart1.ChartAreas[0];

            chart.AxisX.IntervalType = DateTimeIntervalType.Number;

            chart.AxisX.Interval = 1;
            chart.AxisY.Interval = 10;

            chart.AxisX.Minimum = 0;
            chart.AxisY.Minimum = 0;

            chart.AxisX.Maximum = 10;

            chart.AxisX.LabelStyle.Format = "";
            chart.AxisY.LabelStyle.Format = "";
            Series series = new Series("variable") { ChartType = SeriesChartType.Line, BorderWidth = 2, MarkerSize = 5, MarkerStyle = MarkerStyle.Square };
            chart1.Series["variable"].IsValueShownAsLabel = true;
            chart1.Series["variable"].ChartType = SeriesChartType.Line;
            chart1.Series["variable"].Color = Color.BlueViolet;

             foreach (var p in data)
               chart1.Series["variable"].Points.AddXY( p.Item1,p.Item2);


<pre>  }

        private static readonly CultureInfo EnglishCulture = CultureInfo.GetCultureInfo("en-US");

        private static Tuple<string, int="">[] Getdata(string[] lines)
            return Array.ConvertAll(lines, line =>
                string[] elems = line.Split('=');
                return new Tuple<string, int="">(elems[0], int.Parse(elems[1], EnglishCulture));

Updated 26-May-21 0:56am
BillWoodruff 25-May-21 10:45am
Where does the Chart come from ? 3rd. party Control ?
Member 15021328 25-May-21 11:59am
windows form chart control
DonathanH 25-May-21 17:12pm
I don't see in your code where you refresh the chart control. Try adding chart1.Refresh(); after your data loop.

1 solution

After looking at your code, I'm not sure about the DataBindXY used in a loop versus the AddXY method. It does appear that the Refresh method is missing.

Here is a method I use to display a stacked bar chart to display success versus error to show error rates.

public static void ErrorRateChart(Chart chartControl, DateTime startDate, DateTime endDate, Int64 projectTypeID = 0)
         //Clear the chart control

         //Get the data from the database
         SummaryEntityList errRate = StatusReport.GetErrorRate(projectTypeID, startDate, endDate);

         if (errRate != null)
             //Add and format the legend

             chartControl.Legends[0].Position.Auto = false;
             chartControl.Legends[0].Position.X = 0;
             chartControl.Legends[0].Position.Y = 0;
             chartControl.Legends[0].Position.Width = 30;
             chartControl.Legends[0].Position.Height = 15;

             //Set the Y axis
             chartControl.ChartAreas[0].AxisY.Title = "Success Rate (%)";
             chartControl.ChartAreas[0].AxisY.TitleFont = new Font("Arial", 11, FontStyle.Regular);

             //Create the series and add data
             Series seriesSucceeded = chartControl.Series.Add("Succeeded");
             seriesSucceeded.ChartType = SeriesChartType.StackedBar100;
             seriesSucceeded.IsValueShownAsLabel = true;

             foreach (SummaryEntity item in errRate)
                 seriesSucceeded.Points.AddXY(item.Project, item.Succeeded);

             //Create the series and add data
             Series seriesFailed = chartControl.Series.Add("Failed");
             seriesFailed.ChartType = SeriesChartType.StackedBar100;
             seriesFailed.IsValueShownAsLabel = true;

             foreach (SummaryEntity item in errRate)
                 seriesFailed.Points.AddXY(item.Project, item.Failed);

     catch (Exception ex)
         //Log the error and stack trace
         ErrorLogWriter.ErrorLog = ErrorLogWriter.ErrorLog.Write(ex);

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