图表能够很直观的表现数据在某个时间段的变化趋势，或者呈现数据的整体和局部之间的相互关系，相较于大篇幅的文本数据，图表更增加了我们分析数据时选择的多样性，是我们挖掘数据背后潜在价值的一种更为有效地方式。在做数据汇报时，常用到PPT幻灯片来辅助工作，下面的示例中将演示如何通过C#编程在PPT幻灯片中创建图表。示例中主要介绍了三种图表的创建方法，如下:

1. 创建柱形图表
2. 创建饼状图表
3. 创建混合型图表（柱形图、折线图）

使用工具：Spire.Presentation for .NET
PS：下载安装后，注意添加引用Spire.Presentation.dll到程序，dll文件可在安装路径下的Bin文件夹中获取。

【示例 1 】创建柱形图表

using Spire.Presentation;
using Spire.Presentation.Charts;
using System;
using System.Drawing;namespace ColumnChart
{class Program{static void Main(string[] args){//创建一个PowerPoint文档Presentation presentation = new Presentation();//插入柱形图RectangleF rect = new RectangleF(40, 50, 680, 500);IChart chart = presentation.Slides[0].Shapes.AppendChart(ChartType.Column3DClustered, rect);//添加图表名chart.ChartTitle.TextProperties.Text = "2018年上半年销量";chart.ChartTitle.TextProperties.IsCentered = true;chart.ChartTitle.Height = 30;chart.HasTitle = true;//定义一个sting[,]数组string[,] data = new string[,]{{"产品大类","1月","2月","3月","4月","5月","6月" },{"DW10","1542","1057","1223","1302","1145","1336"},{"ZQ13","4587","3658","2515","3154","2984","3890" },{"YI73","558","458","369","576","334","482" },{"TR11","2011","2485" ,"3010" ,"2785" ,"2225" ,"2476" }};//将数据写入图表后台数据表for (int i = 0; i < data.GetLength(0); i++){for (int j = 0; j < data.GetLength(1); j++){//将数字类型的字符串转换为整数int number;bool result = Int32.TryParse(data[i, j], out number);if (result){chart.ChartData[i, j].Value = number;}else{chart.ChartData[i, j].Value = data[i, j];}}}//设置系列标签chart.Series.SeriesLabel = chart.ChartData["B1", "G1"];//设置类别标签chart.Categories.CategoryLabels = chart.ChartData["A2", "A5"];//为各个系列赋值chart.Series[0].Values = chart.ChartData["B2", "B5"];chart.Series[1].Values = chart.ChartData["C2", "C5"];chart.Series[2].Values = chart.ChartData["D2", "D5"];chart.Series[3].Values = chart.ChartData["E2", "E5"];chart.Series[4].Values = chart.ChartData["F2", "F5"];chart.Series[5].Values = chart.ChartData["G2", "G5"];//应用内置图标样式chart.ChartStyle = ChartStyle.Style12;//设置系列重叠chart.OverLap = -50;//设置类别间距chart.GapWidth = 200;//保存并打开文档presentation.SaveToFile("柱形图.pptx", FileFormat.Pptx2010);System.Diagnostics.Process.Start("柱形图.pptx");}}
}

调试运行程序后，生成图表，如下图：

【示例 2 】创建环形图表

using Spire.Presentation;
using Spire.Presentation.Charts;
using Spire.Presentation.Drawing;
using System.Drawing;namespace DoughnutChart
{class Program{static void Main(string[] args){//创建一个PowerPoint文件Presentation presentation = new Presentation();//插入圆环图RectangleF rect = new RectangleF(40, 100, 550, 320);IChart chart = presentation.Slides[0].Shapes.AppendChart(ChartType.Doughnut, rect, false);//设置图表名chart.ChartTitle.TextProperties.Text = "市场份额";chart.ChartTitle.TextProperties.IsCentered = true;chart.ChartTitle.Height = 30;chart.HasTitle = true;//定义数据string[] countries = new string[] { "古巴", "墨西哥", "法国", "德国" };int[] sales = new int[] { 1800, 3000, 5100, 6200 };//将数据写入图表后台数据表chart.ChartData[0, 0].Text = "国家";chart.ChartData[0, 1].Text = "销售额";for (int i = 0; i < countries.Length; ++i){chart.ChartData[i + 1, 0].Value = countries[i];chart.ChartData[i + 1, 1].Value = sales[i];}//设置系列标签chart.Series.SeriesLabel = chart.ChartData["B1", "B1"];//设置分类标签chart.Categories.CategoryLabels = chart.ChartData["A2", "A5"];//为系列赋值chart.Series[0].Values = chart.ChartData["B2", "B5"];//添加点到系列for (int i = 0; i < chart.Series[0].Values.Count; i++){ChartDataPoint cdp = new ChartDataPoint(chart.Series[0]);cdp.Index = i;chart.Series[0].DataPoints.Add(cdp);}//为系列里的个点添加背景颜色chart.Series[0].DataPoints[0].Fill.FillType = FillFormatType.Solid;chart.Series[0].DataPoints[0].Fill.SolidColor.Color = Color.LightBlue;chart.Series[0].DataPoints[1].Fill.FillType = FillFormatType.Solid;chart.Series[0].DataPoints[1].Fill.SolidColor.Color = Color.MediumPurple;chart.Series[0].DataPoints[2].Fill.FillType = FillFormatType.Solid;chart.Series[0].DataPoints[2].Fill.SolidColor.Color = Color.DarkGray;chart.Series[0].DataPoints[3].Fill.FillType = FillFormatType.Solid;chart.Series[0].DataPoints[3].Fill.SolidColor.Color = Color.DarkOrange;//设置标签显示数值chart.Series[0].DataLabels.LabelValueVisible = true;//设置标签显示百分比chart.Series[0].DataLabels.PercentValueVisible = true;//设置圆环内径大小chart.Series[0].DoughnutHoleSize = 60;//保存文档presentation.SaveToFile("环形图.pptx", FileFormat.Pptx2013);System.Diagnostics.Process.Start("环形图.pptx");}}
}

环形图创建效果:

【示例 3 】创建混合型图表

using Spire.Presentation;
using Spire.Presentation.Charts;
using Spire.Presentation.Drawing;
using System;
using System.Data;
using System.Drawing;namespace 混合图表
{class Program{static void Main(string[] args){//新建一个PowerPoint文档Presentation presentation = new Presentation();//插入柱形图RectangleF rect = new RectangleF(40, 100, 650, 320);IChart chart = presentation.Slides[0].Shapes.AppendChart(ChartType.ColumnClustered, rect);//添加表名chart.ChartTitle.TextProperties.Text = "2017季度销售情况";chart.ChartTitle.TextProperties.IsCentered = true;chart.ChartTitle.Height = 30;chart.HasTitle = true;//创建一个DataTableDataTable dataTable = new DataTable();dataTable.Columns.Add(new DataColumn("季度", Type.GetType("System.String")));dataTable.Columns.Add(new DataColumn("销售额", Type.GetType("System.Int32")));dataTable.Columns.Add(new DataColumn("同比增长率", Type.GetType("System.Decimal")));dataTable.Rows.Add("1季度", 200, 0.6);dataTable.Rows.Add("2季度", 250, 0.8);dataTable.Rows.Add("3季度", 300, 0.6);dataTable.Rows.Add("4季度", 150, 0.2);            //将DataTable数据导入图表后台数据表for (int c = 0; c < dataTable.Columns.Count; c++){chart.ChartData[0, c].Text = dataTable.Columns[c].Caption;}for (int r = 0; r < dataTable.Rows.Count; r++){object[] datas = dataTable.Rows[r].ItemArray;for (int c = 0; c < datas.Length; c++){chart.ChartData[r + 1, c].Value = datas[c];}}//设置系列标签chart.Series.SeriesLabel = chart.ChartData["B1", "C1"];//设置类别标签      chart.Categories.CategoryLabels = chart.ChartData["A2", "A5"];//为系列赋值chart.Series[0].Values = chart.ChartData["B2", "B5"];chart.Series[1].Values = chart.ChartData["C2", "C5"];//将系列2的图表类型改为折线图chart.Series[1].Type = ChartType.LineMarkers;//将系列2显示到第二根轴chart.Series[1].UseSecondAxis = true;//显示百分比数据chart.SecondaryValueAxis.NumberFormat = "0%";//不显示第二根轴的网格线chart.SecondaryValueAxis.MajorGridTextLines.FillType = FillFormatType.None;//设置系列重叠chart.OverLap = -50;//设置类别间距chart.GapWidth = 200;//保存打开文档presentation.SaveToFile("混合图表.pptx", FileFormat.Pptx2010);System.Diagnostics.Process.Start("混合图表.pptx");}}
}

图表创建结果：

注：Spire.Presentation 支持创建多大73种不同的图表样式，如下图

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