利用openxml在Excel中插入图表

 using System.Collections.Generic;
 using System.Linq;
 using DOD = DocumentFormat.OpenXml.Drawing;
 using DODC = DocumentFormat.OpenXml.Drawing.Charts;
 using DODS = DocumentFormat.OpenXml.Drawing.Spreadsheet;
 using DOS = DocumentFormat.OpenXml.Spreadsheet;
 using DOX = DocumentFormat.OpenXml;
 using pkg = DocumentFormat.OpenXml.Packaging;

 namespace  InsertChartTest
 {
     class Program
     {
         const string fileName = @"C:\Users\Administrator\source\repos\OpenXMLStudy\OpenXMLStudy\Sum100.xlsx";

         static void Main(string[] args)
         {
             string worksheetName = "Joe";
             string title = "New Chart";
             Dictionary<string, int> data = new Dictionary<string, int>();
             data.Add("abc", );
             data.Add("dsa", );
             InsertChartInSpreadsheet(fileName, worksheetName, title, data);

         }

         private static void InsertChartInSpreadsheet(string docName, string worksheetName, string title,
     Dictionary<string, int> data)
         {
             using (pkg.SpreadsheetDocument document = pkg.SpreadsheetDocument.Open(docName, true))
             {
                 IEnumerable<DOS.Sheet> sheets = document.WorkbookPart.Workbook.Descendants<DOS.Sheet>();

                 if (sheets == null || sheets.Count() <= )
                     return;

                 pkg.WorksheetPart worksheetPart = (pkg.WorksheetPart)document.WorkbookPart.GetPartById(sheets.First().Id);

                 System.Diagnostics.Debug.WriteLine("SheetID:{0}", sheets.First().Id);

                 // DOS.Worksheet worksheet = worksheetPart.Worksheet;
                 pkg.DrawingsPart drawingsPart = worksheetPart.AddNewPart<pkg.DrawingsPart>();

                 worksheetPart.Worksheet.Append(new DOS.Drawing()
                 {
                     Id = worksheetPart.GetIdOfPart(drawingsPart)
                 });
                 worksheetPart.Worksheet.Save();

                 pkg.ChartPart chartPart = drawingsPart.AddNewPart<pkg.ChartPart>();

                 //图表实例
                 chartPart.ChartSpace = new DODC.ChartSpace();

                 chartPart.ChartSpace.Append(
                     new DODC.EditingLanguage()
                     {
                         Val = new DOX.StringValue("en-US")
                     });

                 //图表最外层
                 DODC.Chart chart = chartPart.ChartSpace.AppendChild<DODC.Chart>(new DODC.Chart());

                 //图形区
                 DODC.PlotArea plotArea = chart.AppendChild<DODC.PlotArea>(new DODC.PlotArea());

                 //布局
                 DODC.Layout layout = plotArea.AppendChild<DODC.Layout>(new DODC.Layout());

                 //柱形图
                 DODC.BarChart barChart = plotArea
                     .AppendChild<DODC.BarChart>(
                     new DODC.BarChart(
                         new DODC.BarDirection()
                         {
                             Val = new DOX.EnumValue<DODC.BarDirectionValues>(DODC.BarDirectionValues.Column)
                         },
                         new DODC.BarGrouping()
                         {
                             Val = new DOX.EnumValue<DODC.BarGroupingValues>(DODC.BarGroupingValues.Clustered)
                         }));

                 uint i = ;

                 foreach (string key in data.Keys)
                 {
                     //柱形图序列
                     DODC.BarChartSeries barChartSeries = barChart
                         .AppendChild<DODC.BarChartSeries>(
                         new DODC.BarChartSeries(//柱形图序列
                             new DODC.Index()
                             {
                                 Val = new DOX.UInt32Value(i)
                             },
                             new DODC.Order()
                             {
                                 Val = new DOX.UInt32Value(i)
                             },
                             new DODC.SeriesText( //系列文本
                                 new DODC.NumericValue()
                                 {
                                     Text = key
                                 })
                             ));

                     //字符串常值
                     DODC.StringLiteral strLit = barChartSeries
                         .AppendChild<DODC.CategoryAxisData>(
                         new DODC.CategoryAxisData())
                         .AppendChild<DODC.StringLiteral>(
                         new DODC.StringLiteral());

                     strLit.Append(new DODC.PointCount()
                     {
                         Val = new DOX.UInt32Value(1U)
                     });

                     strLit.AppendChild<DODC.StringPoint>(new DODC.StringPoint()
                     {
                         Index = new DOX.UInt32Value(0U)
                     })
                     .Append(new DODC.NumericValue(key)); //原为title

                     //值常值
                     DODC.NumberLiteral numLit = barChartSeries
                         .AppendChild<DODC.Values>(new DODC.Values()
                         ).AppendChild<DODC.NumberLiteral>(new DODC.NumberLiteral()
                         );

                     numLit.Append(new DODC.FormatCode("General"));

                     numLit.Append(new DODC.PointCount()
                     {
                         Val = new DOX.UInt32Value(1U)
                     });

                     numLit.AppendChild<DODC.NumericPoint>(new DODC.NumericPoint()
                     {
                         Index = new DOX.UInt32Value(0u)
                     }).Append(new DODC.NumericValue(data[key].ToString()));

                     i++;
                 }

                 barChart.Append(new DODC.AxisId()
                 {
                     Val = new DOX.UInt32Value(48650112u)
                 });

                 barChart.Append(new DODC.AxisId()
                 {
                     Val = new DOX.UInt32Value(48672768u)
                 });

                 //分类坐标值
                 DODC.CategoryAxis catAx = plotArea.AppendChild<DODC.CategoryAxis>(
                     new DODC.CategoryAxis(
                         new DODC.AxisId()
                         {
                             Val = new DOX.UInt32Value(48650112u)
                         },
                         new DODC.Scaling(new DODC.Orientation()
                         {
                             Val = new DOX.EnumValue<DODC.OrientationValues>(DODC.OrientationValues.MinMax)
                         }),
                         new DODC.AxisPosition()//坐标值位置
                         {
                             Val = new DOX.EnumValue<DODC.AxisPositionValues>(DODC.AxisPositionValues.Bottom)
                         },
                         new DODC.TickLabelPosition()//标签位置
                         {
                             Val = new DOX.EnumValue<DODC.TickLabelPositionValues>(DODC.TickLabelPositionValues.NextTo)
                         },
                         new DODC.CrossingAxis()
                         {
                             Val = new DOX.UInt32Value(48672768U)
                         },
                         new DODC.Crosses()
                         {
                             Val = new DOX.EnumValue<DODC.CrossesValues>(DODC.CrossesValues.AutoZero)
                         },
                         new DODC.AutoLabeled()
                         {
                             Val = new DOX.BooleanValue(true)
                         },
                         new DODC.LabelAlignment()
                         {
                             Val = new DOX.EnumValue<DODC.LabelAlignmentValues>(DODC.LabelAlignmentValues.Center)
                         },
                         new DODC.LabelOffset()
                         {
                             Val = new DOX.UInt16Value((ushort))
                         }
                         ));

                 //值坐标值
                 DODC.ValueAxis valAx = plotArea.AppendChild<DODC.ValueAxis>(
                     new DODC.ValueAxis(
                         new DODC.AxisId()
                         {
                             Val = new DOX.UInt32Value(48672768u)
                         },
                         new DODC.Scaling(
                             new DODC.Orientation()
                             {
                                 Val = new DOX.EnumValue<DODC.OrientationValues>(DODC.OrientationValues.MinMax)
                             }),
                         new DODC.AxisPosition()
                         {
                             Val = new DOX.EnumValue<DODC.AxisPositionValues>(DODC.AxisPositionValues.Left)
                         },
                         new DODC.MajorGridlines(),
                         new DODC.NumberingFormat()
                         {
                             FormatCode = new DOX.StringValue("General"),
                             SourceLinked = new DOX.BooleanValue(true)
                         },
                         new DODC.TickLabelPosition()
                         {
                             Val = new DOX.EnumValue<DODC.TickLabelPositionValues>(DODC.TickLabelPositionValues.NextTo)
                         },
                         new DODC.CrossingAxis()
                         {
                             Val = new DOX.UInt32Value(48650112U)
                         },
                         new DODC.Crosses()
                         {
                             Val = new DOX.EnumValue<DODC.CrossesValues>(DODC.CrossesValues.AutoZero)
                         },
                         new DODC.CrossBetween()
                         {
                             Val = new DOX.EnumValue<DODC.CrossBetweenValues>(DODC.CrossBetweenValues.Between)
                         }));

                 //图例
                 DODC.Legend legend = chart.AppendChild<DODC.Legend>(
                     new DODC.Legend(
                         new DODC.LegendPosition()
                         {
                             Val = new DOX.EnumValue<DODC.LegendPositionValues>(DODC.LegendPositionValues.Right) //图例位置
                         }));

                 //图可见
                 chart.Append(new DODC.PlotVisibleOnly()
                 {
                     Val = new DOX.BooleanValue(true)
                 });

                 chartPart.ChartSpace.Save();

                 drawingsPart.WorksheetDrawing = new DODS.WorksheetDrawing();

                 //图例和图形区域大小
                 DODS.TwoCellAnchor twoCellAnchor = drawingsPart.WorksheetDrawing.AppendChild<DODS.TwoCellAnchor>(new DODS.TwoCellAnchor());

                 //图形区域大小
                 twoCellAnchor.Append(new DODS.FromMarker(new DODS.ColumnId(""),
                 new DODS.ColumnOffset(""),
                 new DODS.RowId(""),
                 new DODS.RowOffset("")));

                 //图例区域大小
                 twoCellAnchor.Append(new DODS.ToMarker(new DODS.ColumnId(""),
                     new DODS.ColumnOffset(""),
                     new DODS.RowId(""),
                     new DODS.RowOffset("")));

                 //添加图形和图例到区域中
                 //图形框架
                 DODS.GraphicFrame graphicFrame =
                 twoCellAnchor.AppendChild<DODS.GraphicFrame>(new DODS.GraphicFrame());
                 graphicFrame.Macro = "";

                 //图表标题
                 graphicFrame.Append(
                     new DODS.NonVisualGraphicFrameProperties(
                         new DODS.NonVisualDrawingProperties()
                         {
                             Id = new DOX.UInt32Value(2u),
                             Name = "Chart 1"
                         },
                         new DODS.NonVisualGraphicFrameDrawingProperties()
                         ));

                 //区域坐标
                 graphicFrame.Append(
                     new DODS.Transform(
                         new DOD.Offset()
                         {
                             X = 0L,
                             Y = 0L
                         },
                         new DOD.Extents()
                         {
                             Cx = 0L,
                             Cy = 0L
                         }
                         ));

                 //把图形添加到区域中
                 graphicFrame.Append(
                     new DOD.Graphic(
                         new DOD.GraphicData(
                             new DODC.ChartReference()
                             {
                                 Id = drawingsPart.GetIdOfPart(chartPart)//指定图形ID
                             })
                 { Uri = "http://schemas.openxmlformats.org/drawingml/2006/chart" }
                         ));

                 twoCellAnchor.Append(new DODS.ClientData());

                 drawingsPart.WorksheetDrawing.Save();

             }
         }
     }
 }

运行上面代码得到图表如图：

注意：上面代码不支持重复运行