在 NPOI 條形圖中將網格線添加到 y 軸

Question

我想向使用 NPOI 創建的條形圖 (IChart) 添加水平網格線。 我在文檔中找不到關於向圖表添加網格線的任何內容，我想知道我是否遺漏了一些東西。 我的代碼如下所示：

IDrawing drawing = sheet.CreateDrawingPatriarch();
IClientAnchor anchor = drawing.CreateAnchor(0, 0, 0, 0, 4, chartRow, 10, chartRow + 30);
IChart chart = drawing.CreateChart(anchor);
IBarChartData<string, double> data = chart.ChartDataFactory.CreateBarChartData<string, double>();
IChartAxis xAxis = chart.ChartAxisFactory.CreateCategoryAxis(AxisPosition.Bottom);
xAxis.MajorTickMark = AxisTickMark.None;
xAxis.MinorTickMark = AxisTickMark.None;
IValueAxis yAxis = chart.ChartAxisFactory.CreateValueAxis(AxisPosition.Left);
yAxis.MajorTickMark = AxisTickMark.Cross;
yAxis.MinorTickMark = AxisTickMark.None;
yAxis.Crosses = AxisCrosses.AutoZero;
yAxis.SetCrossBetween(AxisCrossBetween.Between);

IChartDataSource<string> xSource = DataSources.FromStringCellRange(sheet, new CellRangeAddress(chartRow + 1, lastRow, 0, 0));
IChartDataSource<double> ySource = DataSources.FromNumericCellRange(sheet, new CellRangeAddress(chartRow + 1, lastRow, 1, 1));
IBarChartSeries<string, double> series = data.AddSeries(xSource, ySource);
series.SetTitle("Matches By World-Check Category"); // This doesn't display for some reason
chart.Plot(data, xAxis, yAxis);

Answer 1

不支持顯示圖表的次要和主要網格線。

我建議為增強功能創建一張票。

Answer 2

你可以用這樣的東西添加網格線

chart.GetCTChart().plotArea.valAx[0].AddNewMajorGridlines(); // Alongside Y
chart.GetCTChart().plotArea.catAx[0].AddNewMajorGridlines(); // Alongside X