c# - Best way to bind multiple lists to multiple chart series

Question

I have several instances of a class containing a BindingList . The list is updated periodically.

public class myclass
{
    public BindingList<double> values;
    public string name;
    //....code

    public void UpdateVaues()
    {
        //Get somevalue
        values.Add(somevalue);
    }
}

Ideally I would like to put several of these lists in something like a DataTable and just do:

chart1.DataSource = datatable;

And then later:

chart1.DataBind();

and have everything updated.

Currently I am just constantly rebinding each list one at a time:

//Inside main form
chart1.Series["one"].Points.DataBindY(myclass1.values);
chart1.Series["two"].Points.DataBindY(myclass2.values);
//...

I can't believe this is the best way. Any ideas?

Answer 1

You could use DataSet with DataTables and an ObservableCollection if you are looking for one source with multiple bindings.

public class myclass
{
    public DataSet dataSet = new DataSet();
    public DataTable dt1;
    public DataTable dt2;

    public ObservableCollection<double> values1;
    public ObservableCollection<double> values2;

    public myclass() {
        values1.CollectionChanged += values1Changed;
    }

    public void CreateTables()
    {
        // Create the DataSet

        // Create the Data Tables
        dt1 = new DataTable();
        dt2 = new DataTable();

        dataSet.Tables.Add(dt1);
        dataSet.Tables.Add(dt1);

        chart1.DataSource = dataSet;
    }

    private void values1Changed(object sender, NotifyCollectionChangedEventArgs args)
    {
        //Get somevalue (what changed)
        dt1.Rows.Add(somevalue);

        chart1.DataBind();
    }
}

Edit: Another possible solution based on BindingSource with multiple BindingList

    public BindingSource bindingSource { get; set; } = new BindingSource();
    public BindingList<BindingList<double>> bindingList { get; set; } = new BindingList<BindingList<double>>();
    public BindingList<double> values1 { get; set; } = new BindingList<double>();
    public BindingList<double> values2 { get; set; } = new BindingList<double>();

    public Form1()
    {
        InitializeComponent();

        bindingList.Add(values1);
        bindingList.Add(values2);

        bindingSource.DataSource = bindingList;

        chart1.DataSource = bindingSource;
    }

Disclaimer: I haven't fully tested this but you can see if it works. You will also need to set the DataMembers on the chart.