Creating a Custom Line Style for the Measurement Studio Web Forms Graph .NET Controls

With Measurement Studio .NET user interface controls, you can extend various visual elements, such as point styles and borders. You can develop these extensions independent of their context and apply them to any object that accepts the extended type.

Line style is one example of a visual element that you can extend to provide a style that is not already available. To create a custom line style, derive a class from the LineStyle base class. In the derived class, you must provide an implementation for the abstract CreatePen method.

The attached example details the implementation of a custom line style that draws a gradient from red to blue in the plot area of a graph. Use this extended line style for the Plot.LineStyle, Cursor.LineStyle, and CartesianPlot.LineToBaseStyle property values. To implement this custom line style, create a Pen object from a LinearGradientBrush object using the width specified in the LineStyleDrawArgs argument to CreatePen.

Note: When implementing CreatePen, you must ensure that a null reference (Nothing in Visual Basic) is not returned. Implementations of CreatePen must also always create a new Pen object and not return one of the SystemPens objects.

VB.NET

WaveformGraph1.Plots(0).LineStyle = New GradientLineStyle

Dim sineSignal As New SineSignal(1)
Dim data As Double() = sineSignal.Generate(100, 100)
WaveformGraph1.PlotY(data)

C#

waveformGraph1.Plots[0].LineStyle = new GradientLineStyle();

SineSignal sineSignal = new SineSignal(1);
double[] data = sineSignal.Generate(100, 100);
waveformGraph1.PlotY(data);

The following image shows the effect of using the custom line style on a waveform graph:

Downloads

customlinestyle.cs

customlinestyle.vb

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