using Spire.Xls;
using System.Drawing;
using System.Drawing.Imaging;

namespace CreateChart_XLS
{
 class Program
 {
 static void Main(string[] args)
 {
  //創建一個Workbook類實例，加載Excel文檔
  Workbook workbook = new Workbook();
  workbook.LoadFromFile(@"C:\Users\Administrator\Desktop\Sample.xlsx");

  //獲取第一個工作表
  Worksheet sheet = workbook.Worksheets[0];

  //設置工作表的名稱
  sheet.Name = "柱狀圖";
  sheet.GridLinesVisible = false;

  //創建柱狀圖
  Chart chart = sheet.Charts.Add(ExcelChartType.ColumnClustered);

  //指定用于生成圖表的數據區域
  chart.DataRange = sheet.Range["A2:G6"];
  chart.SeriesDataFromRange = false;

  //指定圖表所在的位置
  chart.LeftColumn = 1;
  chart.TopRow = 9;
  chart.RightColumn = 12;
  chart.BottomRow = 26;

  //設置圖表的名稱及字體格式
  chart.ChartTitle = "上半年產品銷售情況(單位：萬美元)";
  chart.ChartTitleArea.IsBold = true;
  chart.ChartTitleArea.Size = 12;

  //設置X軸坐標名稱及字體格式
  chart.PrimaryCategoryAxis.Title = "產品類別";
  chart.PrimaryCategoryAxis.Font.IsBold = true;
  chart.PrimaryCategoryAxis.TitleArea.IsBold = false;
  
  //設置Y軸坐標名稱及字體格式
  chart.PrimaryValueAxis.Title = "銷售額";  
  chart.PrimaryValueAxis.HasMajorGridLines = false;
  chart.PrimaryValueAxis.TitleArea.TextRotationAngle = 90;
  chart.PrimaryValueAxis.MinValue = 0.5;
  chart.PrimaryValueAxis.TitleArea.IsBold = false;

  //設置圖例的位置
  chart.Legend.Position = LegendPositionType.Right;

  //保存文檔
  workbook.SaveToFile("ColumnChart.xlsx", ExcelVersion.Version2013);


  //加載生成圖表后的Excel文檔
  workbook.LoadFromFile("ColumnChart.xlsx");

  //遍歷工作簿，診斷是否包含圖表
  Image[] images = workbook.SaveChartAsImage(sheet);

  for (int i = 0; i < images.Length; i++)
  {
   //將圖表保存為圖片
   images[i].Save(string.Format("img-{0}.png", i), ImageFormat.Png);
  }
 }
 }
}