如何使用具有多个系列的EPPlus创建图表？

Question

我正在尝试使用EPPlus创建此图表:

Area            Imports         Exports
North America   9.00010837      14.54751448
South America   7.878137347     4.878011063
Europe          32.41924303     39.37317481
Middle East     6.859031587     12.94288951
Africa          7.611513341     2.938054884
Asia            36.23196633     25.32035526

结果应如下所示:

这是我的代码:

dataSheet.Cells["A1"].Value = "Area";
dataSheet.Cells["B1"].Value = "Imports";
dataSheet.Cells["C1"].Value = "Exports";

var row = 2;
foreach (var item in items)
{
    dataSheet.Cells["A" + row].Value = item.GeographicalAreaPersianName;
    dataSheet.Cells["B" + row].Value = item.ImportsShare;
    dataSheet.Cells["C" + row].Value = item.ExportsShare;
    row++;
}


var diagram = diagramSheet.Drawings.AddChart("chart", eChartType.ColumnClustered);

for (int i = 2; i <= row; i++)
{
    var series = diagram.Series.Add($"'Data'!B{i}:C{i}", $"'Data'!A{i}:A{i}");
}
diagram.Border.Fill.Color = System.Drawing.Color.Green;

然而我得到的是这个结果:

正如你所看到的,系列标题没有正确显示,我在EPPlus中找不到合适的帮助.我怎么能纠正这个？

Answer 1

我们假设数据存储如下面的屏幕截图所示:

以下应该做的伎俩:

var diagram = worksheet.Drawings.AddChart("chart", eChartType.ColumnClustered);

for (int i = 2; i <= row; i++)
 {
  var series = diagram.Series.Add($"B{i}:C{i}", "B1:C1");
  series.Header = worksheet.Cells[$"A{i}"].Value.ToString();
 }
diagram.Border.Fill.Color = System.Drawing.Color.Green;

Add方法的第二个参数代表系列标题{"Imports","Exports"}

对于区域,您必须设置标题.

结果图如下所示:(上面代码的实际结果):