C# 创建EXCEL图表并保存为图片

 1 using Spire.Xls;
 2 using System.Drawing;
 3 using System.Drawing.Imaging;
 4 
 5 namespace CreateChart_XLS
 6 {
 7     class Program
 8     {
 9         static void Main(string[] args)
10         {
11             //创建一个Workbook类实例，加载Excel文档
12             Workbook workbook = new Workbook();
13             workbook.LoadFromFile(@"C:\Users\Administrator\Desktop\Sample.xlsx");
14 
15             //获取第一个工作表
16             Worksheet sheet = workbook.Worksheets[0];
17 
18             //设置工作表的名称
19             sheet.Name = "柱状图";
20             sheet.GridLinesVisible = false;
21 
22             //创建柱状图
23             Chart chart = sheet.Charts.Add(ExcelChartType.ColumnClustered);
24 
25             //指定用于生成图表的数据区域
26             chart.DataRange = sheet.Range["A2:G6"];
27             chart.SeriesDataFromRange = false;
28 
29             //指定图表所在的位置
30             chart.LeftColumn = 1;
31             chart.TopRow = 9;
32             chart.RightColumn = 12;
33             chart.BottomRow = 26;
34 
35             //设置图表的名称及字体格式
36             chart.ChartTitle = "上半年产品销售情况(单位：万美元)";
37             chart.ChartTitleArea.IsBold = true;
38             chart.ChartTitleArea.Size = 12;
39 
40             //设置X轴坐标名称及字体格式
41             chart.PrimaryCategoryAxis.Title = "产品类别";
42             chart.PrimaryCategoryAxis.Font.IsBold = true;
43             chart.PrimaryCategoryAxis.TitleArea.IsBold = false;
44          
45             //设置Y轴坐标名称及字体格式
46             chart.PrimaryValueAxis.Title = "销售额";            
47             chart.PrimaryValueAxis.HasMajorGridLines = false;
48             chart.PrimaryValueAxis.TitleArea.TextRotationAngle = 90;
49             chart.PrimaryValueAxis.MinValue = 0.5;
50             chart.PrimaryValueAxis.TitleArea.IsBold = false;
51 
52             //设置图例的位置
53             chart.Legend.Position = LegendPositionType.Right;
54 
55              //保存文档
56             workbook.SaveToFile("ColumnChart.xlsx", ExcelVersion.Version2013);
57 
58 
59              //加载生成图表后的Excel文档
60             workbook.LoadFromFile("ColumnChart.xlsx");
61 
62             //遍历工作簿，诊断是否包含图表
63             Image[] images = workbook.SaveChartAsImage(sheet);
64 
65              for (int i = 0; i < images.Length; i++)
66               {
67                  //将图表保存为图片
68                   images[i].Save(string.Format("img-{0}.png", i), ImageFormat.Png);
69                }
70         }
71     }
72 }