Create Flowchart Visio Diagram Programmatically in C# .NET

readme.md

You can find more details at: Create Flowchart Programmatically in C#

Create Flowchart csharp.cs

class Program
{
    static void Main(string[] args)
    {
        // schema for the diagram to be created
        Input diagramObject = new Input()
        {
            InputRectangles = new List<InputRectangle>() {
                    new InputRectangle() {
                        Name = "A",
                        Text = "Manager"
                    },
                    new InputRectangle() {
                        Name = "B",
                        Text = "Team Leader"
                    },
                    new InputRectangle() {
                        Name = "C",
                        Text = "Team Member"
                    },
                    new InputRectangle() {
                        Name = "D",
                        Text = "Team Member"
                    },
                    new InputRectangle() {
                        Name = "E",
                        Text = "Team Member"
                    }
                },
            InputConnectors = new List<InputConnector>() {
                    new InputConnector() {
                        OriginShapeName = "A",
                        DestinationShapeName = "B"
                    },
                    new InputConnector() {
                        OriginShapeName = "B",
                        DestinationShapeName = "C"
                    },
                    new InputConnector() {
                        OriginShapeName = "B",
                        DestinationShapeName = "D"
                    },
                    new InputConnector() {
                        OriginShapeName = "B",
                        DestinationShapeName = "E"
                    }
                }
        };

        Diagram diagram = new Diagram("BasicShapes.vss");
        Page page = diagram.Pages[0];

        Dictionary<string, long> shapeNames = new Dictionary<string, long>();

        //Adding shapes and connectors from the schema
        foreach (var rectangle in diagramObject.InputRectangles)
        {
            Shape shape = new Shape();
            var shapeId = diagram.AddShape(shape, @"Rectangle", 0);
            shapeNames.Add(rectangle.Name, shapeId);
            shape = page.Shapes.GetShape(shapeId);
            shape.Text.Value.Add(new Txt(rectangle.Text));
        }


        foreach (var connector in diagramObject.InputConnectors)
        {
            var connectorId = diagram.AddShape(new Shape(), "Dynamic connector", 0);
            page.ConnectShapesViaConnector(shapeNames[connector.OriginShapeName],
                                            ConnectionPointPlace.Right,
                                            shapeNames[connector.DestinationShapeName],
                                            ConnectionPointPlace.Left,
                                            connectorId);
        }


        LayoutOptions layoutOptions = new LayoutOptions()
        {
            LayoutStyle = LayoutStyle.FlowChart,
            Direction = LayoutDirection.LeftToRight,
            SpaceShapes = 5,
            EnlargePage = true
        };

        diagram.Layout(layoutOptions);

        page.PageSheet.PrintProps.PrintPageOrientation.Value = PrintPageOrientationValue.Landscape;

        DiagramSaveOptions saveOptions = new DiagramSaveOptions()
        {
            SaveFormat = SaveFileFormat.Vsdx,
            AutoFitPageToDrawingContent = true
        };

        diagram.Save("output.vsdx", saveOptions);
    }
}

public class Input
{
    public System.Collections.Generic.List<InputRectangle> InputRectangles { get; set; }
    public System.Collections.Generic.List<InputConnector> InputConnectors { get; set; }
}

public class InputRectangle
{
    public string Name { get; set; }
    public string Text { get; set; }
}

public class InputConnector
{
    public string OriginShapeName { get; set; }
    public string DestinationShapeName { get; set; }
}