How to apply different color to a chart series in Xamarin.Forms application?
We can apply different color to the individual chart series in a chart. For example, we can apply different color for each bar in the bar chart or for each slice in a Pie chart.
The following code example illustrates applying different colors to the chart series.
private void CreatePresentation()
{
//Create a PowerPoint presentation instance
IPresentation presentation = Presentation.Create();
//Create a blank slide
ISlide slide = presentation.Slides.Add(SlideLayoutType.Blank);
//Add a chart in specific location
IPresentationChart chart = slide.Charts.AddChart(270, 70, 500, 400);
//Set the chart data
chart.ChartData.SetValue(1, 1, "Gender");
chart.ChartData.SetValue(1, 2, "Male");
chart.ChartData.SetValue(1, 3, "Female");
chart.ChartData.SetValue(2, 1, "Accommodation");
chart.ChartData.SetValue(3, 1, "Food");
chart.ChartData.SetValue(4, 1, "Cosmetics");
chart.ChartData.SetValue(5, 1, "Cloths");
chart.ChartData.SetValue(6, 1, "Medicines");
chart.ChartData.SetValue(2, 2, 30);
chart.ChartData.SetValue(3, 2, 60);
chart.ChartData.SetValue(4, 2, 45);
chart.ChartData.SetValue(5, 2, 55);
chart.ChartData.SetValue(6, 2, 15);
chart.ChartData.SetValue(2, 3, 60);
chart.ChartData.SetValue(3, 3, 30);
chart.ChartData.SetValue(4, 3, 75);
chart.ChartData.SetValue(5, 3, 15);
chart.ChartData.SetValue(6, 3, 35);
//Specifies the chart title
chart.ChartTitle = "Expenses";
//Create a new chart-series with the name
IOfficeChartSerie serieForMale = chart.Series.Add("Male");
//Set the data range for chart
serieForMale.Values = chart.ChartData[2, 2, 6, 2];
//Create a new chart-series with the name
IOfficeChartSerie serieForFemale = chart.Series.Add("Female");
//Set the data range for chart
serieForFemale.Values = chart.ChartData[2, 3, 6, 3];
//Set the data range for category axis
chart.PrimaryCategoryAxis.CategoryLabels = chart.ChartData[2, 1, 6, 1];
//Set the chart type as bar chart
chart.ChartType = OfficeChartType.Bar_Clustered;
//Set color for the serie of male
SetColorForSerie(serieForMale);
//Set color for the serie of femle
SetColorForSerie(serieForFemale);
//Save the presentation into memory stream
presentation.Save("sample.pptx");
//Close the presentation intstance
presentation.Close();
}
/// <summary>
/// Set the color to serie datapoints
/// </summary>
/// <param name="serie">Represent the serie of the chart</param>
private void SetColorForSerie(IOfficeChartSerie serie)
{
for (int i = serie.Values.FirstRow; i <= serie.Values.LastRow; i++)
{
int percentage = Convert.ToInt32(serie.Values.GetValue(i, serie.Values.FirstColumn));
if (percentage > 50)
serie.DataPoints[i - serie.Values.FirstRow].DataFormat.Fill.ForeColorIndex = OfficeKnownColors.Orange;
else
serie.DataPoints[i - serie.Values.FirstRow].DataFormat.Fill.ForeColorIndex = OfficeKnownColors.Violet;
}
}
The following screen shot displays the pie chart and bar with different color.
Please find the sample from this link.
Conclusion
I hope you enjoyed learning about how to apply different color to a Xamarin.Forms Chart series.
You can refer to our Xamarin.Forms Chart feature tour page to know about its other groundbreaking feature representations. You can also explore our Xamarin.Forms Chart documentation to understand how to create and manipulate data.
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