Trend Line
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Add Trend Line
Aspose.Slides for .NET provides a simple API for managing different chart Trend Lines:
- Create an instance of the Presentation class.
- Obtain a slide’s reference by its index.
- Add a chart with default data along with the any of desired type (this example uses ChartType.ClusteredColumn).
- Adding exponential trend line for chart series 1.
- Adding linear trend line for chart series 1.
- Adding logarithmic trend line for chart series 2.
- Adding moving average trend line for chart series 2.
- Adding polynomial trend line for chart series 3.
- Adding power trend line for chart series 3.
- Write the modified presentation to a PPTX file.
The following code is used to create a chart with Trend Lines.
// Creating empty presentation
Presentation pres = new Presentation();
// Creating a clustered column chart
IChart chart = pres.Slides[0].Shapes.AddChart(ChartType.ClusteredColumn, 20, 20, 500, 400);
// Adding ponential trend line for chart series 1
ITrendline tredLinep = chart.ChartData.Series[0].TrendLines.Add(TrendlineType.Exponential);
tredLinep.DisplayEquation = false;
tredLinep.DisplayRSquaredValue = false;
// Adding Linear trend line for chart series 1
ITrendline tredLineLin = chart.ChartData.Series[0].TrendLines.Add(TrendlineType.Linear);
tredLineLin.TrendlineType = TrendlineType.Linear;
tredLineLin.Format.Line.FillFormat.FillType = FillType.Solid;
tredLineLin.Format.Line.FillFormat.SolidFillColor.Color = Color.Red;
// Adding Logarithmic trend line for chart series 2
ITrendline tredLineLog = chart.ChartData.Series[1].TrendLines.Add(TrendlineType.Logarithmic);
tredLineLog.TrendlineType = TrendlineType.Logarithmic;
tredLineLog.AddTextFrameForOverriding("New log trend line");
// Adding MovingAverage trend line for chart series 2
ITrendline tredLineMovAvg = chart.ChartData.Series[1].TrendLines.Add(TrendlineType.MovingAverage);
tredLineMovAvg.TrendlineType = TrendlineType.MovingAverage;
tredLineMovAvg.Period = 3;
tredLineMovAvg.TrendlineName = "New TrendLine Name";
// Adding Polynomial trend line for chart series 3
ITrendline tredLinePol = chart.ChartData.Series[2].TrendLines.Add(TrendlineType.Polynomial);
tredLinePol.TrendlineType = TrendlineType.Polynomial;
tredLinePol.Forward = 1;
tredLinePol.Order = 3;
// Adding Power trend line for chart series 3
ITrendline tredLinePower = chart.ChartData.Series[1].TrendLines.Add(TrendlineType.Power);
tredLinePower.TrendlineType = TrendlineType.Power;
tredLinePower.Backward = 1;
// Saving presentation
pres.Save("ChartTrendLines_out.pptx", SaveFormat.Pptx);
Add Custom Line
Aspose.Slides for .NET provides a simple API to add custom lines in a chart. To add a simple plain line to a selected slide of the presentation, please follow the steps below:
- Create an instance of Presentation class
- Obtain the reference of a slide by using its Index
- Create a new chart using AddChart method exposed by Shapes object
- Add an AutoShape of Line type using AddAutoShape method exposed by Shapes object
- Set the Color of the shape lines.
- Write the modified presentation as a PPTX file
The following code is used to create a chart with Custom Lines.
using (Presentation pres = new Presentation())
{
IChart chart = pres.Slides[0].Shapes.AddChart(ChartType.ClusteredColumn, 100, 100, 500, 400);
IAutoShape shape = chart.UserShapes.Shapes.AddAutoShape(ShapeType.Line, 0, chart.Height / 2, chart.Width, 0);
shape.LineFormat.FillFormat.FillType = FillType.Solid;
shape.LineFormat.FillFormat.SolidFillColor.Color = Color.Red;
pres.Save("AddCustomLines.pptx", SaveFormat.Pptx);
}