/// <summary>
/// 创建一个图表实例
/// </summary>
/// <param name="excelChart"></param>
/// <param name="sheet"></param>
private void CreateChart(NPOIExcelChart excelChart, ISheet sheet, int startRow, int endRow)
{
if (_excelType != NPOIExcelType.XLS)
{
throw new NotImplementedException("只支持.xls文件作图");
}
IDrawing drawing = sheet.CreateDrawingPatriarch();
IClientAnchor anchor = drawing.CreateAnchor(0, 0, 0, 0, 0, startRow, excelChart.Axis.Count, endRow);
XSSFChart chart = drawing.CreateChart(anchor) as XSSFChart;
chart.Title.String = excelChart.Title;
IChartLegend legend = chart.GetOrCreateLegend();
legend.Position = LegendPosition.TopRight;
//坐标轴
var axis = chart.ChartAxisFactory.CreateCategoryAxis(AxisPosition.Bottom);
axis.IsVisible = true;
//值轴
var data = chart.ChartAxisFactory.CreateValueAxis(AxisPosition.Left);
data.IsVisible = true;
data.Crosses = (AxisCrosses.AutoZero);
IChartDataSource <string> xs = DataSources.FromArray <string>(excelChart.Axis.ToArray());
switch (excelChart.ExcelChartType)
{
case NPOIExcelChartType.Bar:
var chartBarData = chart.ChartDataFactory.CreateBarChartData <string, double>();
foreach (var item in excelChart.Data)
{
var curData = DataSources.FromArray <double>(item.Value.ToArray());
var curSeries = chartBarData.AddSeries(xs, curData);
curSeries.SetTitle(item.Key);
}
chart.Plot(chartBarData, axis, data);
return;
case NPOIExcelChartType.Line:
var chartLineData = chart.ChartDataFactory.CreateLineChartData <string, double>();
foreach (var item in excelChart.Data)
{
var curData = DataSources.FromArray <double>(item.Value.ToArray());
var curSeries = chartLineData.AddSeries(xs, curData);
curSeries.SetTitle(item.Key);
}
chart.Plot(chartLineData, axis, data);
break;
default:
break;
}
}
private static void CreateChart(ISheet sheet, IDrawing drawing, IClientAnchor anchor, string serieTitle, int startDataRow, int endDataRow, int columnIndex)
{
XSSFChart chart = (XSSFChart)drawing.CreateChart(anchor);
IBarChartData <string, double> barChartData = chart.ChartDataFactory.CreateBarChartData <string, double>();
IChartLegend legend = chart.GetOrCreateLegend();
legend.Position = LegendPosition.Bottom;
IChartAxis bottomAxis = chart.ChartAxisFactory.CreateCategoryAxis(AxisPosition.Bottom);
bottomAxis.MajorTickMark = AxisTickMark.None;
IValueAxis leftAxis = chart.ChartAxisFactory.CreateValueAxis(AxisPosition.Left);
leftAxis.Crosses = AxisCrosses.AutoZero;
leftAxis.SetCrossBetween(AxisCrossBetween.Between);
IChartDataSource <string> categoryAxis = DataSources.FromStringCellRange(sheet, new CellRangeAddress(startDataRow, endDataRow, 0, 0));
IChartDataSource <double> valueAxis = DataSources.FromNumericCellRange(sheet, new CellRangeAddress(startDataRow, endDataRow, columnIndex, columnIndex));
var serie = barChartData.AddSeries(categoryAxis, valueAxis);
serie.SetTitle(serieTitle);
chart.Plot(barChartData, bottomAxis, leftAxis);
}
static void CreateChart(IDrawing drawing, ISheet sheet, IClientAnchor anchor, string serie1, string serie2, bool enableMajorGridline = false)
{
XSSFChart chart = (XSSFChart)drawing.CreateChart(anchor);
chart.SetTitle("Test 1");
IChartLegend legend = chart.GetOrCreateLegend();
legend.Position = LegendPosition.TopRight;
ILineChartData <double, double> data = chart.ChartDataFactory.CreateLineChartData <double, double>();
// Use a category axis for the bottom axis.
IChartAxis bottomAxis = chart.ChartAxisFactory.CreateCategoryAxis(AxisPosition.Bottom);
IValueAxis leftAxis = chart.ChartAxisFactory.CreateValueAxis(AxisPosition.Left);
leftAxis.Crosses = AxisCrosses.AutoZero;
IChartDataSource <double> xs = DataSources.FromNumericCellRange(sheet, new CellRangeAddress(0, 0, 0, NUM_OF_COLUMNS - 1));
IChartDataSource <double> ys1 = DataSources.FromNumericCellRange(sheet, new CellRangeAddress(1, 1, 0, NUM_OF_COLUMNS - 1));
IChartDataSource <double> ys2 = DataSources.FromNumericCellRange(sheet, new CellRangeAddress(2, 2, 0, NUM_OF_COLUMNS - 1));
var s1 = data.AddSeries(xs, ys1);
s1.SetTitle(serie1);
var s2 = data.AddSeries(xs, ys2);
s2.SetTitle(serie2);
chart.Plot(data, bottomAxis, leftAxis);
//add major gridline, available since NPOI 2.5.5
var plotArea = chart.GetCTChart().plotArea;
plotArea.catAx[0].AddNewMajorGridlines();
plotArea.valAx[0].AddNewMajorGridlines();
}
