Get Lifelines

Get Lifelines from a Sequence Diagram

To get lifelines, use the Lifelines property of the ISequenceDiagram object.

public void GetLifelines(ICommandContext c, ICommandParams p)
{
    ISequenceDiagram sequenceDiagram = c.App.Workspace.CurrentEditor as ISequenceDiagram;
    if (sequenceDiagram == null) return;

    //Get lifelines
    ILifelineShapeCollection lifelines = sequenceDiagram.Lifelines;

    var no = 1;
    foreach (ILifelineShape lifeline in lifelines)
    {
        c.App.Output.WriteLine("sample", $"{no}th lifeline : {lifeline.Text}");
        no++;
    }
}

Get lifeline model information from sequence diagram

To get lifeline model information from sequence diagram, first get the interaction model from the Model property of the ISequenceDiagram object. After casting the obtained model to IInteraction type, use the Lifelines property to obtain the lifeline model information.

public void GetLifelineModels(ICommandContext c, ICommandParams p)
{
    ISequenceDiagram sequenceDiagram = c.App.Workspace.CurrentEditor as ISequenceDiagram;
    if (sequenceDiagram == null) return;

    //Get the interaction model
    IInteraction interaction = sequenceDiagram.Model as IInteraction;
    //Get the lifeline model
    ILifelineCollection lifelineModels = interaction.Lifelines;

    var no = 1;
    foreach (ILifeline lifelineModel in lifelineModels)
    {
        c.App.Output.WriteLine("sample", $"{no}th lifeline model : {lifelineModel.Name}");
        no++;
    }
}