1.事先在模板中画好图表
这种方法适合表中的行,列都是固定的,比如说3行3列,这样我们就可以先用假数据填充,然后根据假数据直接在Excel中插入图表。
之后通过OpenXml填充真实的数据,图表会相应的变化。
数据填充后
2.通过代码生成图表
大致思路:
先填充数据>>获取数据源(用于生成图表的数据,比如A1-A10)>>插入图表对象>>用数据源填充图表对象>>保存图表对象
在sdk自带的帮助文档中,有专门的列子供参考,这里只是基于那个列子做了一定的修改
public static void InsertChartInSpreadsheet(string docName, string worksheetName, string title)
// Open the document for editing.
using (SpreadsheetDocument document = SpreadsheetDocument.Open(docName, true))
#region 1
IEnumerable<Sheet> sheets = document.WorkbookPart.Workbook.Descendants<Sheet>().Where(s => s.Name == worksheetName);
if (sheets.Count() == 0)
// The specified worksheet does not exist.
return;
WorksheetPart worksheetPart = (WorksheetPart)document.WorkbookPart.GetPartById(sheets.First().Id);
// Add a new drawing to the worksheet.
DrawingsPart drawingsPart = worksheetPart.AddNewPart<DrawingsPart>();
worksheetPart.Worksheet.Append(new DocumentFormat.OpenXml.Spreadsheet.Drawing() { Id = worksheetPart.GetIdOfPart(drawingsPart) });
worksheetPart.Worksheet.Save();
// Add a new chart and set the chart language to English-US.
ChartPart chartPart = drawingsPart.AddNewPart<ChartPart>();
chartPart.ChartSpace = new ChartSpace();
chartPart.ChartSpace.Append(new EditingLanguage() { Val = new StringValue("en-US") });
DocumentFormat.OpenXml.Drawing.Charts.Chart chart = chartPart.ChartSpace.AppendChild<DocumentFormat.OpenXml.Drawing.Charts.Chart>(
new DocumentFormat.OpenXml.Drawing.Charts.Chart());
// Create a new clustered column chart.
PlotArea plotArea = chart.AppendChild<PlotArea>(new PlotArea());
Layout layout = plotArea.AppendChild<Layout>(new Layout());
//------------------------------------------------------图表类型根据自己的需求定义
//柱状图
//BarChart barChart = plotArea.AppendChild<BarChart>(new BarChart(new BarDirection() { Val = new EnumValue<BarDirectionValues>(BarDirectionValues.Column) },
// new BarGrouping() { Val = new EnumValue<BarGroupingValues>(BarGroupingValues.Clustered) }));
//折线图
LineChart barChart = plotArea.AppendChild<LineChart>(new LineChart(
new Grouping() { Val = new EnumValue<GroupingValues>(GroupingValues.Standard) }
//--------------------------------------------------------------------------------------
#endregion
uint i = 0;
//生成x轴
CategoryAxisData cad = new CategoryAxisData();
// mySheet!$D$2:$D$11 就是一个数据区间,根据这个区间生成图表的X轴
cad.StringReference = new StringReference() { Formula = new DocumentFormat.OpenXml.Drawing.Charts.Formula("mySheet!$D$2:$D$11") };
//本列子是生成两根折线
for (int col = 1; col < 3; col++)
//数据源
string formulaString = string.Format("{0}!${1}$2:${1}$11", worksheetName, GetCellReference(col));
DocumentFormat.OpenXml.Drawing.Charts.Values v = new DocumentFormat.OpenXml.Drawing.Charts.Values();
v.NumberReference = new NumberReference() { Formula = new DocumentFormat.OpenXml.Drawing.Charts.Formula(formulaString) };
formulaString = string.Format("{0}!${1}$1", worksheetName, GetCellReference(col));
SeriesText st = new SeriesText();
st.StringReference = new StringReference() { Formula = new DocumentFormat.OpenXml.Drawing.Charts.Formula(formulaString) };
// 生成一个实例---柱状图
//BarChartSeries barChartSeries = barChart.AppendChild<BarChartSeries>(new BarChartSeries(new Index() { Val = new UInt32Value(i) },
// new Order() { Val = new UInt32Value(i) }, st, v));
//生成一个实例---折线图
LineChartSeries lineChartSeries = barChart.AppendChild<LineChartSeries>(new LineChartSeries(new Index() { Val = new UInt32Value(i) },
new Order() { Val = new UInt32Value(i) }, st, v));
//插入水平轴
//if (i == 0)
// lineChartSeries.AppendChild(cad);
i += 1;
//-------------------------------------------------------------以下代码没有做任何改动,跟sdk中的源码一致
#region 2
barChart.Append(new AxisId() { Val = new UInt32Value(48650112u) });
barChart.Append(new AxisId() { Val = new UInt32Value(48672768u) });
// Add the Category Axis.
CategoryAxis catAx = plotArea.AppendChild<CategoryAxis>(new CategoryAxis(new AxisId() { Val = new UInt32Value(48650112u) },
new Scaling(new Orientation()
Val = new EnumValue<DocumentFormat.OpenXml.Drawing.Charts.OrientationValues>(
DocumentFormat.OpenXml.Drawing.Charts.OrientationValues.MinMax)
new AxisPosition() { Val = new EnumValue<AxisPositionValues>(AxisPositionValues.Bottom) },
new TickLabelPosition() { Val = new EnumValue<TickLabelPositionValues>(TickLabelPositionValues.NextTo) },
new CrossingAxis() { Val = new UInt32Value(48672768U) },
new Crosses() { Val = new EnumValue<CrossesValues>(CrossesValues.AutoZero) },
new AutoLabeled() { Val = new BooleanValue(true) },
new LabelAlignment() { Val = new EnumValue<LabelAlignmentValues>(LabelAlignmentValues.Center) },
new LabelOffset() { Val = new UInt16Value((ushort)100) }));
// Add the Value Axis.
ValueAxis valAx = plotArea.AppendChild<ValueAxis>(new ValueAxis(new AxisId() { Val = new UInt32Value(48672768u) },
new Scaling(new Orientation()
Val = new EnumValue<DocumentFormat.OpenXml.Drawing.Charts.OrientationValues>(
DocumentFormat.OpenXml.Drawing.Charts.OrientationValues.MinMax)
new AxisPosition() { Val = new EnumValue<AxisPositionValues>(AxisPositionValues.Left) },
new MajorGridlines(),
new DocumentFormat.OpenXml.Drawing.Charts.NumberingFormat() { FormatCode = new StringValue("General"), SourceLinked = new BooleanValue(true) },
new TickLabelPosition() { Val = new EnumValue<TickLabelPositionValues>(TickLabelPositionValues.NextTo) },
new CrossingAxis() { Val = new UInt32Value(48650112U) },
new Crosses() { Val = new EnumValue<CrossesValues>(CrossesValues.AutoZero) },
new CrossBetween() { Val = new EnumValue<CrossBetweenValues>(CrossBetweenValues.Between) }));
// Add the chart Legend.
Legend legend = chart.AppendChild<Legend>(new Legend(new LegendPosition() { Val = new EnumValue<LegendPositionValues>(LegendPositionValues.Right) },
new Layout()));
chart.Append(new PlotVisibleOnly() { Val = new BooleanValue(true) });
// Save the chart part.
chartPart.ChartSpace.Save();
// Position the chart on the worksheet using a TwoCellAnchor object.
drawingsPart.WorksheetDrawing = new WorksheetDrawing();
TwoCellAnchor twoCellAnchor = drawingsPart.WorksheetDrawing.AppendChild<TwoCellAnchor>(new TwoCellAnchor());
twoCellAnchor.Append(new DocumentFormat.OpenXml.Drawing.Spreadsheet.FromMarker(new ColumnId("5"),
new ColumnOffset("581025"),
new RowId("4"),
new RowOffset("114300")));
twoCellAnchor.Append(new DocumentFormat.OpenXml.Drawing.Spreadsheet.ToMarker(new ColumnId("13"),
new ColumnOffset("276225"),
new RowId("19"),
new RowOffset("0")));
// Append a GraphicFrame to the TwoCellAnchor object.
DocumentFormat.OpenXml.Drawing.Spreadsheet.GraphicFrame graphicFrame =
twoCellAnchor.AppendChild<DocumentFormat.OpenXml.Drawing.Spreadsheet.GraphicFrame>(
new DocumentFormat.OpenXml.Drawing.Spreadsheet.GraphicFrame());
graphicFrame.Macro = "";
graphicFrame.Append(new DocumentFormat.OpenXml.Drawing.Spreadsheet.NonVisualGraphicFrameProperties(
new DocumentFormat.OpenXml.Drawing.Spreadsheet.NonVisualDrawingProperties() { Id = new UInt32Value(2u), Name = "Chart 1" },
new DocumentFormat.OpenXml.Drawing.Spreadsheet.NonVisualGraphicFrameDrawingProperties()));
graphicFrame.Append(new Transform(new Offset() { X = 0L, Y = 0L },
new Extents() { Cx = 0L, Cy = 0L }));
graphicFrame.Append(new Graphic(new GraphicData(new ChartReference() { Id = drawingsPart.GetIdOfPart(chartPart) }) { Uri = "http://schemas.openxmlformats.org/drawingml/2006/chart" }));
twoCellAnchor.Append(new ClientData());
#endregion
// Save the WorksheetDrawing object.
drawingsPart.WorksheetDrawing.Save();
生成后的图表效果
前面讲到了如果往Excel中填充文本数据,本篇介绍如何向文档中插入图表。插入图表方法有2种:1.事先在模板中画好图表 2.通过代码生成图表1.事先在模板中画好图表这种方法适合表中的行,列都是固定的,比如说3行3列,这样我们就可以先用假数据填充,然后根据假数据直接在Excel中插入图表。之后通过OpenXml填充真实的数据,图表会相应的变化。模板数据填充后
上一节说了如何使用java读取excel里面的图片,一个同事说没必要这么麻烦,他说不用任何开发工具都可以获取到excel里面的图片。我表示不信的样子,他说让一下,让我秀一波操作给你看看
EXCEL的底层实现
修改后缀名为zip
解压zip
docProps目录
[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-f99Tl4Zw-1594950714545)(https://i.loli.net/2020/07/17/DlnM4pZ7B9XK1Er.jpg)]
core.
Openxml format SDK 2.0 v2 的 how to 文章里提供了一个怎样插入 chart 图表的示例, 但这个 chart的数据是独立不是根据excel sheet 上data 动态生成的chart,因此, 我在此示例代码上做了一些改动,可以根据excel sheet 上的数据, 生成 chart 图片, 效果如图
画图的逻辑结构为:
WorksheetPart<-...
原文出自https://www.jeremyjone.com/395/ , 转载请注明。
最近写web,有一个上传和下载Excel的功能,找了半天,下载好说,附带图片也能下载,毕竟html可以直接编译成table,然后整个table通过js-xlsx直接下载到本地。
但是上传就不同了,上传需要操作文件,js并没有足够的能力。我直接把文件传到后端用C#操作。
然而,C#可以读出文本内容和图片,...
1 using System.Collections.Generic;
2 using System.Linq;
3 using DOD = DocumentFormat.OpenXml.Drawing;
4 using DODC = DocumentFormat.OpenXml.Drawing.Charts;
5 using DODS = Documen...
目前发现Open XML的SDK有两个版本,SDK2.0和SDK2.5。
Open XML 2.0的帮助文档:https://docs.microsoft.com/en-us/previous-versions/office/developer/office-2010/ff478153(v=office.14)
Open XML 2.5的帮助文档:https://docs.microsoft.com/zh-cn/office/open-xml/spreadsheets
论坛很多博客都对论文做了总结和分类,但就医学领域而言,对这些论文的筛选信息显然需要更加精细的把控,所以自己对这1400篇的论文做一个大致从名称上的筛选,希望能找到些能解决当前问题的答案。
论文链接建议直接Google论文名,比去各种论文或顶会网站找不知道快捷多少。
Respect!