Hi,

Assuming that diagramView is a variable referencing the DiagramView object of interest, here is the C# code to setup the grid:

Diagram diagram = diagramView.Diagram;
MindFusion.Diagramming.Wpf.Lanes.Grid laneGrid = diagram.LaneGrid;

laneGrid.ColumnCount = 1;
laneGrid.RowCount = 2;
diagram.EnableLanes = true; 

The code above simply initializes the lane grid with two rows and a column. In order to resize the rows and the column, we attach a handler to the DiagramView's SizeChanged event. Then assign the appropriate width and height to the grid columns and rows respectively. Here is the implementation of the SizeChanged event hander:

void diagramView_SizeChanged(object sender, SizeChangedEventArgs e)
{
      Diagram diagram = diagramView.Diagram;
      MindFusion.Diagramming.Wpf.Lanes.Grid laneGrid = diagram.LaneGrid;

      double columnWidth = diagramView.ActualWidth - laneGrid.GetRowHeaderBounds().Width - SystemParameters.VerticalScrollBarWidth;
      double rowHeight = (diagramView.ActualHeight - laneGrid.GetColumnHeaderBounds().Height - SystemParameters.HorizontalScrollBarHeight) / laneGrid.RowHeaders.Count;

      laneGrid.ColumnHeaders[0].Width = columnWidth;
      laneGrid.RowHeaders[0].Height = rowHeight;
      laneGrid.RowHeaders[1].Height = rowHeight;
} 

The code above calculates the width of the column by subtracting the width of the row headers and the width of the vertical scroll bar from the actual width of the diagram view. A similar calculation is performed for row heights.

I hope this helps.

Regards,
Meppy