The jLine control draws a polyline (i.e. a series of line segments connected on after the other). The polyline forms a shape that can be styled like other shapes using the fill, border, and drop shadow features.

The points that define the polyline can be specified at design time using the YCoordinateArray. The items in the array are evenly spaced across the X axis, and each value is a percentage of the jLine control's height. The following provides and illustrative example:

At runtime use the YCoordinates property to add (Enqueue) a point, remove (Dequeue) a point, or both (DequeueAndEnqueue). Using those methods to periodically add/remove items from the YCoordinates in a timer, one can create a trend graph as illustrated below:

void timer1_Tick(object sender, EventArgs e)
{
    // Append each slider value to the end of its corresponding line.
    Invoke(new Action(() =>
    {
        _greenLine.YCoordinates.DequeueAndEnqueue(_greenSlider.Value);
        _yellowLine.YCoordinates.DequeueAndEnqueue(_yellowSlider.Value);
    }));
}

Use the YCoordinatesArray property at design time, and YCoordinates property at run time to add or remove points.