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i have to get plot of line each for list of list
i have a class like this

public class Data
string name;
int values;
public Data(string name, int values)
{ = name;
this.values = values;
public string Name
get { return name; }
set { name = value; }
public int Values
get { return values; }
set { values = value; }

public class datalist
public string key { get; set; }
public List point { get; set; }
public List collectpoints = new List();
public List listdatasource = new List();

public Form2()


private void Form2_Load(object sender, EventArgs e)
foreach (var entry in Class1.users)
string[] array2 = entry.Value.ToArray();

var data = Getdata(array2);

List<Data> listdatasource = new List<Data>();
               foreach (var p in data)
                    listdatasource.Add(new Data(p.Item1, p.Item2));

datalist newlist = new datalist();
               newlist.key = entry.Key;
               newlist.point = listdatasource;



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 = "";

Random random = new Random();

               foreach (var list in collectpoints)

                   chart1.Series[list.key].IsValueShownAsLabel = true;
                   chart1.Series[list.key].ChartType = SeriesChartType.Line;
                   chart1.Series[list.key].Color = Color.FromArgb(random.Next(256), random.Next(256), random.Next(256));

chart1.Series[list.key].YValueMembers = "values";
                    for (int i = 0; i <= list.point.Count; i++)
                        chart1.Series[list.key].Points.AddXY(i, list.point[i].Values);

chart1.DataSource = list.point;


     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));

What I have tried:

i have tried the above code but i am getting only one plot. please suggest me the better approach.
Updated 23-Oct-21 22:23pm
[no name] 25-Oct-21 1:56am    
Each "plot" requires a "Series". You're accessing only one series. There is no evidence that you even have more than one series since you don't create any new ones in your code.
Member 15021328 29-Oct-21 3:49am    
thank you.. i have tried adding series like this
Series series = new Series(list.key) { ChartType = SeriesChartType.Line, BorderWidth = 2, MarkerSize = 5, MarkerStyle = MarkerStyle.Square };
but even though i am getting only one line.

1 solution

Without your data and your code running together, there isn't anything we can do - and we have no access to either.

Think of the development process as writing an email: compiling successfully means that you wrote the email in the right language - English, rather than German for example - not that the email contained the message you wanted to send.

So now you enter the second stage of development (in reality it's the fourth or fifth, but you'll come to the earlier stages later): Testing and Debugging.

Start by looking at what it does do, and how that differs from what you wanted. This is important, because it give you information as to why it's doing it. For example, if a program is intended to let the user enter a number and it doubles it and prints the answer, then if the input / output was like this:
Input   Expected output    Actual output
  1            2                 1
  2            4                 4
  3            6                 9
  4            8                16
Then it's fairly obvious that the problem is with the bit which doubles it - it's not adding itself to itself, or multiplying it by 2, it's multiplying it by itself and returning the square of the input.
So with that, you can look at the code and it's obvious that it's somewhere here:
private int Double(int value)
   return value * value;

Once you have an idea what might be going wrong, start using the debugger to find out why. Put a breakpoint on the first line of the method, and run your app. When it reaches the breakpoint, the debugger will stop, and hand control over to you. You can now run your code line-by-line (called "single stepping") and look at (or even change) variable contents as necessary (heck, you can even change the code and try again if you need to).
Think about what each line in the code should do before you execute it, and compare that to what it actually did when you use the "Step over" button to execute each line in turn. Did it do what you expect? If so, move on to the next line.
If not, why not? How does it differ?
Hopefully, that should help you locate which part of that code has a problem, and what the problem is.
This is a skill, and it's one which is well worth developing as it helps you in the real world as well as in development. And like all skills, it only improves by use!
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