Hi Stefan,

here is a clear example

if i am using a codebehind like this (method) one:

 private void FillChart(object sender)
        {
            if (xmDataChart != null)
            {
                ColorsHelper colors = new ColorsHelper();

                foreach (Series s in xmDataChart.Series)
                {
                    AnimatePropertyTo(s, 0, "Opacity", 4);
                }

                //clear the linegrid series
                xmDataChart.Series.Clear();

                //go through whole DataContext and add series
                brushNum = 0;
                XamDataChart dc = (XamDataChart)sender;
                ChartData cData = (ChartData)dc.DataContext;

                int interval = getInterval(cData);

                foreach (ChartDataSeries ds in cData.ChartDataSeries)
                {
                    StackedColumnSeries xmSeries = new StackedColumnSeries();
                   
                    //xmSeries.ValueMemberPath = "Value";
                    #region Working Area
                    var fragment = new StackedFragmentSeries
                                       {
                                           ValueMemberPath = "Value",
                                           Title = ds.SeriesKey
                                       };

                    xmSeries.Series.Add(fragment);

                    //xmSeries.AutoGenerateSeries = true;

                    #endregion

                    xmSeries.Title = ds.SeriesName;
                    xmSeries.Brush = new SolidColorBrush(colors.Series1[brushNum]); ;
                    xmSeries.Style = App.Current.Resources.MergedDictionaries[0]["StackedColumnSeriesStyle"] as Style;
                    ToolTip newtooltip = new ToolTip();
                    newtooltip.Style = App.Current.Resources.MergedDictionaries[0]["ToolTipStyle"] as Style;
                    xmSeries.ToolTip = newtooltip;
                    xmSeries.XAxis = (CategoryXAxis)xmDataChart.Axes[0];
                    xmSeries.YAxis = (NumericYAxis)xmDataChart.Axes[1];
                    xmSeries.YAxis.Interval = interval;
                    xmSeries.ItemsSource = ds.ChartDataPoints;
                    xmSeries.Legend = TitleLegend;
                    xmDataChart.Series.Add(xmSeries);

                    AnimatePropertyTo(xmSeries, fullOpacityVal, "Opacity", 3);

                    brushNum++;
                }
            }
        }

 then how do i get my ' group by' to work ?

Hi stephan,

thanks for the sample project it worked brilliantly...and sorry i have to ask the same question as amir, but how do you set the Groupby in codebehind ? because i can see you are using a static resource to call the object instance in xaml of the constructor of the Seriesdata class...which then adds all the datapoints observable collection.

but i have an object in code behind and also will like the option of using it in my view Model later on how would i do this ?

Thanks

Hi stephan,

thank you so much i figured the rest out...all i needed to do is to add additional datapoints for the rest of the months in the year to the Series Data and the chart automatically generated the additional stacked columns for the x-axis.

thanks so much!!!!

Basically my question is how to 'categorise'  each column on the X-axis, the sample code for the link i sent you does not show this, if you can modify the sample you sent to me showing at least 2 stacked column on the x-axis and categorised or "grouped as shown  according to "countries" in the linked but i suppose in the sample you sent to me it will be accorind to Dates, that would really be helpful thank you so much.