如何使用EPPLus修改图表系列？

我想问一下如何使用EPPLUS库来更新excel中现有图表的系列值。 我还找不到如何去做。 我已成功创build图表，但仍无法更新系列值。

任何人都可以提供一些示例代码或参考链接？

Answer 1

很抱歉回答这么晚（在search其他内容时发现了你的post）。 如果图表有一系列指向工作表中的单元格，为什么不能直接更新单元格值？ 像这样，首先创build饼图：

public void PieChartCreate() { var file = new FileInfo(@"c:\temp\temp.xlsx"); if (file.Exists) file.Delete(); var pck = new ExcelPackage(file); var workbook = pck.Workbook; var worksheet = workbook.Worksheets.Add("newsheet"); var data = new List<KeyValuePair<string, int>> { new KeyValuePair<string, int>("Group A", 44613), new KeyValuePair<string, int>("Group B", 36432), new KeyValuePair<string, int>("Group C", 6324), new KeyValuePair<string, int>("Group A", 6745), new KeyValuePair<string, int>("Group B", 23434), new KeyValuePair<string, int>("Group C", 5123), new KeyValuePair<string, int>("Group A", 34545), new KeyValuePair<string, int>("Group B", 5472), new KeyValuePair<string, int>("Group C", 45637), new KeyValuePair<string, int>("Group A", 37840), new KeyValuePair<string, int>("Group B", 20827), new KeyValuePair<string, int>("Group C", 4548), }; //Fill the table var startCell = worksheet.Cells[1,1]; startCell.Offset(0, 0).Value = "Group Name"; startCell.Offset(0, 1).Value = "Value"; for (var i = 0; i < data.Count(); i++) { startCell.Offset(i + 1, 0).Value = data[i].Key; startCell.Offset(i + 1, 1).Value = data[i].Value; } //Add the chart to the sheet var pieChart = worksheet.Drawings.AddChart("Chart1", eChartType.Pie); pieChart.SetPosition(data.Count + 1, 0, 0, 0); pieChart.Title.Text = "Test Chart"; pieChart.Title.Font.Bold = true; pieChart.Title.Font.Size = 12; //Set the data range var series = pieChart.Series.Add(worksheet.Cells[2, 2, data.Count, 2], worksheet.Cells[2, 1, data.Count, 1]); var pieSeries = (ExcelPieChartSerie)series; pieSeries.Explosion = 5; //Format the labels pieSeries.DataLabel.Font.Bold = true; pieSeries.DataLabel.ShowValue = true; pieSeries.DataLabel.ShowPercent = true; pieSeries.DataLabel.ShowLeaderLines = true; pieSeries.DataLabel.Separator = ";"; pieSeries.DataLabel.Position = eLabelPosition.BestFit; //Format the legend pieChart.Legend.Add(); pieChart.Legend.Border.Width = 0; pieChart.Legend.Font.Size = 12; pieChart.Legend.Font.Bold = true; pieChart.Legend.Position = eLegendPosition.Right; pck.Save(); } 

然后更新单元格：

 public void PieChartUpdate() { var file = new FileInfo(@"c:\temp\temp.xlsx"); if (!file.Exists) return; var pck = new ExcelPackage(file); var workbook = pck.Workbook; var worksheet = workbook.Worksheets["newsheet"]; var startCell = worksheet.Cells[2, 2]; for (var i = 0; i < 12; i++) { startCell.Offset(i, 0).Value = ((double)startCell.Offset(i, 0).Value) * 100; } file.Delete(); pck.Save(); } 

如果您需要更改系列本身的定义 ，请按名称获取：

 public void PieChartUpdateSeries() { var file = new FileInfo(@"c:\temp\temp.xlsx"); if (!file.Exists) return; var pck = new ExcelPackage(file); var workbook = pck.Workbook; var worksheet = workbook.Worksheets["newsheet"]; var piechart = worksheet.Drawings["Chart1"] as ExcelPieChart; var series = piechart.Series[0]; series.XSeries = worksheet.Cells[2, 1, 7, 1].FullAddress; series.Series = worksheet.Cells[2, 2, 7, 2].FullAddress; file.Delete(); pck.Save(); } 

希望有所帮助。