Hide labels on databound chart

[Derek]

We have a chart in a report that uses datagroupcolumn to break the data into different series.

Is it possible to remove the series labels? How?

[Elian]

Hi Derek,

Using the DataGroupColumn creates dynamic series and you do not have access to their appearance properties. If you wish to customize the series appearance you should create them with code.

Best wishes,
Elian
the Telerik team

[Derek]

Creating the graph in codebehind really isn't a viable option. This is a dynamic chart, so I don't know how many combinations of row/column values I will have.

Is there any way to read the chart items after generation, and turn off or format the labels? Is there any way to apply a 'global' default format to data labels, that would be used for all items regardless of series?

The chart functionality is *almost* there, but this is a showstopper.

[Elian]

Hello Derek,

There is no reason why you can't create the series dynamically. Here's a sample code that groups data and creates chart:

void CreateChartSeries()

        {

            var data = new[]{

                        new {Name = "Item 0", Value = 2, Group = 1},

                        new {Name = "Item 1", Value = 1, Group = 1},

                        new {Name = "Item 2", Value = 3, Group = 1},

                        new {Name = "Item 3", Value = 4, Group = 2},

                        new {Name = "Item 4", Value = 8, Group = 2},

                        new {Name = "Item 5", Value = 5, Group = 2},

                        new {Name = "Item 6", Value = 9, Group = 3},

                        new {Name = "Item 7", Value = 4, Group = 3},

                        new {Name = "Item 8", Value = 9, Group = 3},

                        new {Name = "Item 9", Value = 3, Group = 1},
//we assume that we don't know the structure of the data

                       };

 

            //we already have created chart with styles

            //and properties set as we like

            //just adding the data here

            foreach (var dataItem in data)

            {


                var series = myChart.Series.GetByName(dataItem.Group.ToString());

                if (series == null)

                {

                    series = new ChartSeries(dataItem.Group.ToString());

                    series.Type = ChartSeriesType.Line;

                    series.Appearance.LabelAppearance.Visible = false;

 

                    myChart.Series.Add(series);

                }

                var newItem = new ChartSeriesItem(dataItem.Value, dataItem.Name);

                series.Items.Add(newItem);

            }

        }

See attached image for result. This is a simple approach to grouping (can be done in different ways, other than using the series name as key).

Kind regards,
Elian
the Telerik team

[Derek]

Could this approach be used on a chart contained in a report?