What do you need exactly?

The idea is to show in each stacked bar the quantity of Emission 
for each instalation.In the X we will find the date, and in the Y axis we 
will find the quantity of emissions. 

ValuesOfExcessVSEmissions = 
new ObservableCollection<InstalationEmissionDateInformation>();


public class InstalationEmissionDateInformation
    {
        #region VARIABLES
 
        public string Instalation;
 
        public Decimal Emission;
 
        public string Date;
 
        public Decimal Assignation;
 
        #endregion VARIABLES
 
        public InstalationEmissionDateInformation(string instalation, 
Decimal emission, string date, Decimal assignation)
        {
            Instalation = instalation;
            Emission = emission;
            Date = date;
            Assignation = assignation;
        }
    }

Hi, here's how you could do it:

<UserControl.Resources>
        <local:TestEmissionsCollection x:Key="data" />
        <igChart:GroupBy 
            x:Key="grouped"
            ItemsSource="{StaticResource data}" 
            GroupMemberPath="Date" 
            KeyMemberPath="Installation" 
            ValueMemberPath="Emission" />
    </UserControl.Resources>

    <Grid x:Name="LayoutRoot" Background="White">
        <igChart:XamDataChart x:Name="theChart">
            <igChart:XamDataChart.Axes>
                <igChart:CategoryXAxis x:Name="xAxis" 
                                       ItemsSource="{StaticResource grouped}"
                                       Label="{}{Key}"/>
                <igChart:NumericYAxis x:Name="yAxis" />
            </igChart:XamDataChart.Axes>

            <igChart:XamDataChart.Series>
                <igChart:StackedColumnSeries x:Name="stack"
                                             ItemsSource="{StaticResource grouped}"
                                             XAxis="{Binding ElementName=xAxis}"
                                             YAxis="{Binding ElementName=yAxis}"
                                             AutoGenerateSeries="True"
                                             >
                   
                </igChart:StackedColumnSeries>
            </igChart:XamDataChart.Series>
        </igChart:XamDataChart>
    </Grid>

And code behind:

public class TestEmissionsCollection
        : ObservableCollection<InstalationEmissionDateInformation>
    {
        public TestEmissionsCollection()
        {
            Add(new InstalationEmissionDateInformation("A", 5, "1/1/2012", 1));
            Add(new InstalationEmissionDateInformation("B", 2, "1/1/2012", 1));
            Add(new InstalationEmissionDateInformation("C", 7, "1/1/2012", 1));
            Add(new InstalationEmissionDateInformation("A", 6, "1/2/2012", 1));
            Add(new InstalationEmissionDateInformation("B", 3, "1/2/2012", 1));
            Add(new InstalationEmissionDateInformation("C", 8, "1/2/2012", 1));
            Add(new InstalationEmissionDateInformation("A", 6, "1/3/2012", 1));
            Add(new InstalationEmissionDateInformation("B", 3, "1/3/2012", 1));
            Add(new InstalationEmissionDateInformation("C", 6, "1/3/2012", 1));
            Add(new InstalationEmissionDateInformation("A", 4, "1/4/2012", 1));
            Add(new InstalationEmissionDateInformation("B", 3, "1/4/2012", 1));
            Add(new InstalationEmissionDateInformation("C", 7, "1/4/2012", 1));
        }
    }

    public class InstalationEmissionDateInformation
    {
        public string Installation { get; set; }
        public Decimal Emission { get; set; }
        public string Date { get; set; }
        public Decimal Assignation { get; set; }

        public InstalationEmissionDateInformation(
            string installation, 
            Decimal emission, 
            string date, 
            Decimal assignation)
        {
            Installation = installation;
            Emission = emission;
            Date = date;
            Assignation = assignation;
        }
    }

Please note that I changed your public fields into properties. This is required, currently.

-Graham

Is there a way to do this without the "GroupBy" resource?  We groupby in SQL, so this is not needed... but I can't figure out how to designate which field is the KeyMemberPath or ValueMemberPath.

Using the Sample above how do we properly format the Tooltip value?

Currently it is only displaying the value not the name.

Current Tooltip reads: Series Title: 7

Ideally we want: Emission: 7.

Thanks,

Michael

Using the sample above, how to we get the tooltip to provide meaningful text?

<igChart:StackedColumnSeries x:Name="stack"
ItemsSource="{StaticResource grouped}"
 XAxis="{Binding ElementName=xAxis}"
 YAxis="{Binding ElementName=yAxis}"
 AutoGenerateSeries="True"
 ShowDefaultTooltip="True">
</igChart:StackedColumnSeries>

See attached screenshot.

Thanks,

Michael

Got it now that I am awake. :-)

<Window x:Class="WpfAppStackedColumnSerie.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfAppStackedColumnSerie"
xmlns:igChart="clr-namespace:Infragistics.Controls.Charts;assembly=InfragisticsWPF4.Controls.Charts.XamDataChart.v14.2"
xmlns:ig="http://schemas.infragistics.com/xaml"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<local:TestEmissionsCollection x:Key="data" />
<ig:GroupBy x:Key="grouped"
ItemsSource="{StaticResource data}"
GroupMemberPath="Date"
KeyMemberPath="Installation"
ValueMemberPath="Emission" />
</Window.Resources>
<Grid>