C# 創建含多層分類標簽的Excel圖表

相較於數據，圖表更能直觀的體現數據的變化趨勢。在數據表格中，同一數據值，可能同時代表不同的數據分類，表現在圖表中則是一個數據體現在多個數據分類標簽下。通常生成的圖表一般預設只有一種分類標簽，下麵的方法將通過編程的方式來介紹在Excel中如何來生成含多層分類標簽的圖表。 

使用工具：Spire.XLS for .NET

1.通過官網（https://www.e-iceblue.cn/Introduce/Spire-XLS-NET.html ）下載安裝包--解壓-安裝。在程式中添加引用Spire.XLS.dll，dll文件在安裝路徑下的bin文件夾中。

2.通過 Nuget 官網。（http://www.nuget.org/packages/Spire.XLS/ ）

添加引用完成後，如下圖：

C#示例代碼

 Step1:創建工作表

//創建Workbook實例，獲取工作表
Workbook wb = new Workbook();
Worksheet sheet = wb.Worksheets[0];

Step2:寫入數據到表格

 sheet.Range["A2"].Text = "出口前";
 sheet.Range["A5"].Text = "出口後";
 sheet.Range["B1"].Text = "年份";
 sheet.Range["B2"].Text = "2017年";
 sheet.Range["B6"].Text = "2018年";
 sheet.Range["C1"].Text = "季度";
 sheet.Range["C2"].Text = "1季度";
 sheet.Range["C3"].Text = "2季度";
 sheet.Range["C4"].Text = "3季度";
 sheet.Range["C5"].Text = "4季度";
 sheet.Range["C6"].Text = "1季度";
 sheet.Range["C7"].Text = "2季度";
 sheet.Range["C8"].Text = "3季度";
 sheet.Range["C9"].Text = "4季度";
 sheet.Range["D1"].Text = "季度產量\n（萬噸）";
 sheet.Range["D2"].Value = "1.56";
 sheet.Range["D3"].Value = "2.3";
 sheet.Range["D4"].Value = "3.21";
 sheet.Range["D5"].Value = "3.5";
 sheet.Range["D6"].Value = "4.8";
 sheet.Range["D7"].Value = "5.2";
 sheet.Range["D8"].Value = "5.79";
 sheet.Range["D9"].Value = "5.58";

Step3:合併單元格並設置單元格對齊方式

sheet.Range["A2:A4"].Merge();
sheet.Range["A5:A9"].Merge();
sheet.Range["B2:B5"].Merge();
sheet.Range["B6:B9"].Merge();
sheet.Range["A1:D9"].Style.HorizontalAlignment = HorizontalAlignType.Center;
sheet.Range["A1:D9"].Style.VerticalAlignment = VerticalAlignType.Center;

Step4:添加圖表到Excel

//添加柱狀圖表
Chart chart = sheet.Charts.Add(ExcelChartType.LineMarkers);
chart.ChartTitle = "季度產量（萬噸）";//設置圖表標題     
chart.PlotArea.Fill.FillType = ShapeFillType.NoFill; //不填充繪圖區域（預設填充灰色）
chart.Legend.Delete();//刪除圖例

//指定柱狀圖表在工作表中的位置及寬度
chart.LeftColumn = 5;
chart.TopRow = 1;
chart.RightColumn = 14;

//設置圖表系列數據來源
chart.DataRange = sheet.Range["D2:D9"];
chart.SeriesDataFromRange = false;
chart.Series[0].DataPoints.DefaultDataPoint.DataLabels.HasValue = true;
chart.Series[0].Format.LineProperties.Color = Color.BlueViolet;

//設置系列分類標簽數據來源
ChartSerie serie = chart.Series[0];
serie.CategoryLabels = sheet.Range["A2:C9"];

Step5:設置是否顯示多層分類標簽

chart.PrimaryCategoryAxis.MultiLevelLable = true;

Step6: 保存文檔

wb.SaveToFile("output.xlsx", ExcelVersion.Version2013);

圖表創建結果：

全部代碼:

using Spire.Xls;
using Spire.Xls.Charts;
using System.Drawing;

namespace ChartWithMultiLevelCategoryLabels_XLS
{
    class Program
    {
        static void Main(string[] args)
        {
            //創建Workbook實例，獲取工作表
            Workbook wb = new Workbook();
            Worksheet sheet = wb.Worksheets[0];

            //寫入數據到工作表
            sheet.Range["A2"].Text = "出口前";
            sheet.Range["A5"].Text = "出口後";
            sheet.Range["B1"].Text = "年份";
            sheet.Range["B2"].Text = "2017年";
            sheet.Range["B6"].Text = "2018年";
            sheet.Range["C1"].Text = "季度";
            sheet.Range["C2"].Text = "1季度";
            sheet.Range["C3"].Text = "2季度";
            sheet.Range["C4"].Text = "3季度";
            sheet.Range["C5"].Text = "4季度";
            sheet.Range["C6"].Text = "1季度";
            sheet.Range["C7"].Text = "2季度";
            sheet.Range["C8"].Text = "3季度";
            sheet.Range["C9"].Text = "4季度";
            sheet.Range["D1"].Text = "季度產量\n（萬噸）";
            sheet.Range["D2"].Value = "1.56";
            sheet.Range["D3"].Value = "2.3";
            sheet.Range["D4"].Value = "3.21";
            sheet.Range["D5"].Value = "3.5";
            sheet.Range["D6"].Value = "4.8";
            sheet.Range["D7"].Value = "5.2";
            sheet.Range["D8"].Value = "5.79";
            sheet.Range["D9"].Value = "5.58";
            

            //合併單元格，設置單元格對齊方式
            sheet.Range["A2:A4"].Merge();
            sheet.Range["A5:A9"].Merge();
            sheet.Range["B2:B5"].Merge();
            sheet.Range["B6:B9"].Merge();
            sheet.Range["A1:D9"].Style.HorizontalAlignment = HorizontalAlignType.Center;
            sheet.Range["A1:D9"].Style.VerticalAlignment = VerticalAlignType.Center;


            //添加柱狀圖表
            Chart chart = sheet.Charts.Add(ExcelChartType.LineMarkers);
            chart.ChartTitle = "季度產量（萬噸）";//設置圖表標題     
            chart.PlotArea.Fill.FillType = ShapeFillType.NoFill; //不填充繪圖區域（預設填充灰色）
            chart.Legend.Delete();//刪除圖例

            //指定柱狀圖表在工作表中的位置及寬度
            chart.LeftColumn = 5;
            chart.TopRow = 1;
            chart.RightColumn = 14;

            //設置圖表系列數據來源
            chart.DataRange = sheet.Range["D2:D9"];
            chart.SeriesDataFromRange = false;
            chart.Series[0].DataPoints.DefaultDataPoint.DataLabels.HasValue = true;
            chart.Series[0].Format.LineProperties.Color = Color.BlueViolet;

            //設置系列分類標簽數據來源
            ChartSerie serie = chart.Series[0];
            serie.CategoryLabels = sheet.Range["A2:C9"];


            //顯示多層分類標簽
            chart.PrimaryCategoryAxis.MultiLevelLable = true;

            //保存文檔
            wb.SaveToFile("output.xlsx", ExcelVersion.Version2013);
            System.Diagnostics.Process.Start("output.xlsx");
        }
    }
}

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