Line Dash Style SpreadsheetGear API Sample

// Create a new workbook and some local variables.
SpreadsheetGear.IWorkbook workbook = SpreadsheetGear.Factory.GetWorkbook();
SpreadsheetGear.IWorksheet worksheet = workbook.ActiveWorksheet;
SpreadsheetGear.IWorksheetWindowInfo windowInfo = worksheet.WindowInfo;

// We will position lines relative to a given range, starting in Row 2.
SpreadsheetGear.IRange currentRow = worksheet.Cells["2:2"];

// Position line across Columns A:E
double xStart = 10;
double xEnd = windowInfo.ColumnToPoints(5) - 10;

// Convert LineDashStyle enum options into an IEnumerable.
var lineDashStyles = System.Enum.GetValues(typeof(SpreadsheetGear.Shapes.LineDashStyle))
    .OfType<SpreadsheetGear.Shapes.LineDashStyle>();

// Iterate over each Dash Style.
foreach (var lineDashStyle in lineDashStyles)
{
    // Position line relative to "currentRow" and add a slight slant to it.
    double yStart = windowInfo.RowToPoints(currentRow.Row) - 5;
    double yEnd = yStart + 10;

    // Add the line and set its weight.
    SpreadsheetGear.Shapes.IShape lineShape = worksheet.Shapes.AddLine(xStart, yStart, 
        xEnd, yEnd);
    SpreadsheetGear.Shapes.ILineFormat lineFormat = lineShape.Line;
    lineFormat.Weight = 5;

    // Set Dash Style
    lineFormat.DashStyle = lineDashStyle;

    // Provide some information in an adjacent cell to indicate dash style.
    currentRow[0, 5].Value = $"Dash Style: {lineDashStyle}";

    // Offset down 2 rows from the current row to prep next line.
    currentRow = currentRow.Offset(2, 0);
}