Multiple Series Charts with WPFtoolkit

If you want a Chart with two LineSeries

You may have 2 different lists in your .cs file filed with data:

List<KeyValuePair<DateTime, int>> llistaGastats = new List<KeyValuePair<DateTime, int>>();List<KeyValuePair<DateTime, int>> llistaPreu = new List<KeyValuePair<DateTime, int>>();

Then you have to create another list to group those two lists:

var dataSourceList = new List<List<KeyValuePair<DateTime, int>>>();dataSourceList.Add(llistaGastats);dataSourceList.Add(llistaPreu);

And assign it to the DataContext

lineChart.DataContext = dataSourceList;

In your .xaml file you should create a Chart with two LineSeries and get the value of each Line using the ItemSource field.

Here is the .xaml:

<chartingToolkit:Chart Name="lineChart"                                       Title="Consum KW"                                        VerticalAlignment="Top"                                        Margin="0,58,58,0"                                        Height="382"                                       Grid.Column="1">                <chartingToolkit:LineSeries Name="KWG"                                                Title="KW Gastats"                                                  DependentValuePath="Value"                                                 IndependentValuePath="Key"                                                ItemsSource="{Binding [0]}"                                                IsSelectionEnabled="True"/>                <chartingToolkit:LineSeries Name="KWP"                                                 Title="Preu KW"                                                  DependentValuePath="Value"                                                 IndependentValuePath="Key"                                                ItemsSource="{Binding [1]}"                                                IsSelectionEnabled="True" />            </chartingToolkit:Chart>

ItemsSource="{Binding [0]}" Binds the first item in the list assigned to the DataContext.ItemsSource="{Binding [1]}" Binds the second

You might want to consider the alternatives, from past experience the charting components in the WPF Toolkit are extremely rigid and hard to extend. I've also had numerous issues with bugs in the toolkit and active development seems to have completely ground to a halt. There are some very good free alternative that are worth considering.

Beat Kiener has a great article on Databinding Multi-Series Charts. In it, he implements his own MultiChart class, derived from Chart.

This may be too late for you, but at least it may help others.