Member name	Value	Description
GanttRow	0	Indicates Gridline of a gantt row grid line type.
TopTierColumn	1	Indicates Gridline of top tier column grid line type.
BottomTierColumn	2	Indicates Gridline of bottom tier column grid line type.
SheetRow	3	Indicates Gridline of a sheet row grid line type.
SheetColumn	4	Indicates Gridline of a sheet column grid line type.
UsageRow	5	Indicates Gridline of a usage row grid line type.
UsageColumn	6	Indicates Gridline of a usage column grid line type.
GanttTitleVertical	7	Indicates Gantt title vertical grid line type.
GanttTitleHorizontal	8	Indicates Gantt title horizontal grid line type.
BarRows	9	Indicates Bar rows grid line type.
GanttProjectStart	10	Indicates Gantt project start grid line type.
GanttProjectFinish	11	Indicates Gantt project finish grid line type.
GanttStatusDate	12	Indicates Gantt status date grid line type.
GanttCurrentDate	13	Indicates Gantt current date grid line type.
GanttPageBreaks	14	Indicates Gantt page breaks grid line type.
MiddleTierColumn	15	Indicates Gridline of middle tier column grid line type.

Examples

Shows how to work with gridlines while save in visual formats.

var project = new Project(DataDir + "CreateProject2.mpp");
var options = new ImageSaveOptions(SaveFileFormat.PNG);

var gridline = new Gridline
{
    // set the type of gridline (<see cref="P:Aspose.Tasks.Visualization.Gridline.GridlineType" />).
    GridlineType = GridlineType.GanttRow, 
    // set the <see cref="T:Aspose.Tasks.Visualization.LinePattern" /> of a gridline
    Pattern = LinePattern.Dashed
};

options.Gridlines = new List<Gridline>();
options.Gridlines.Add(gridline);

project.Save(OutDir + "PrintProjectPagesToSeparateFiles_out.png", options);

Reference

Aspose.Tasks.Visualization Namespace