C#を使用してExcelでピボット・テーブルを作成する方法 Interop vs IronXL

.NETで昔ながらの方法でピボットテーブルを作成する方法

using Excel = Microsoft.Office.Interop.Excel;
using System.Runtime.InteropServices;

// Create Excel application instance
Excel.Application xlApp = new Excel.Application();
Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(@"C:\Data\SalesData.xlsx");
Excel.Worksheet xlSheet = (Excel.Worksheet)xlWorkbook.Sheets[1];
Excel.Worksheet xlPivotSheet = (Excel.Worksheet)xlWorkbook.Sheets.Add();

// Define data range for pivot table
Excel.Range dataRange = xlSheet.UsedRange;

// Create pivot cache and pivot table
Excel.PivotCache pivotCache = xlWorkbook.PivotCaches().Create(
    Excel.XlPivotTableSourceType.xlDatabase,
    dataRange,
    Type.Missing);
Excel.PivotTable pivotTable = pivotCache.CreatePivotTable(
    xlPivotSheet.Cells[3, 1],
    "SalesPivot",
    Type.Missing,
    Type.Missing);

// Configure pivot table fields
Excel.PivotField productField = (Excel.PivotField)pivotTable.PivotFields("Product");
productField.Orientation = Excel.XlPivotFieldOrientation.xlRowField;
productField.Position = 1;
Excel.PivotField regionField = (Excel.PivotField)pivotTable.PivotFields("Region");
regionField.Orientation = Excel.XlPivotFieldOrientation.xlColumnField;
regionField.Position = 1;
Excel.PivotField salesField = (Excel.PivotField)pivotTable.PivotFields("Sales");
pivotTable.AddDataField(salesField, "Sum of Sales", Excel.XlConsolidationFunction.xlSum);

// Save and cleanup
xlWorkbook.SaveAs(@"C:\Data\PivotReport.xlsx");
xlWorkbook.Close();
xlApp.Quit();

// Release COM objects to prevent memory leaks
Marshal.ReleaseComObject(pivotTable);
Marshal.ReleaseComObject(pivotCache);
Marshal.ReleaseComObject(xlPivotSheet);
Marshal.ReleaseComObject(xlSheet);
Marshal.ReleaseComObject(xlWorkbook);
Marshal.ReleaseComObject(xlApp);

using Excel = Microsoft.Office.Interop.Excel;
using System.Runtime.InteropServices;

// Create Excel application instance
Excel.Application xlApp = new Excel.Application();
Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(@"C:\Data\SalesData.xlsx");
Excel.Worksheet xlSheet = (Excel.Worksheet)xlWorkbook.Sheets[1];
Excel.Worksheet xlPivotSheet = (Excel.Worksheet)xlWorkbook.Sheets.Add();

// Define data range for pivot table
Excel.Range dataRange = xlSheet.UsedRange;

// Create pivot cache and pivot table
Excel.PivotCache pivotCache = xlWorkbook.PivotCaches().Create(
    Excel.XlPivotTableSourceType.xlDatabase,
    dataRange,
    Type.Missing);
Excel.PivotTable pivotTable = pivotCache.CreatePivotTable(
    xlPivotSheet.Cells[3, 1],
    "SalesPivot",
    Type.Missing,
    Type.Missing);

// Configure pivot table fields
Excel.PivotField productField = (Excel.PivotField)pivotTable.PivotFields("Product");
productField.Orientation = Excel.XlPivotFieldOrientation.xlRowField;
productField.Position = 1;
Excel.PivotField regionField = (Excel.PivotField)pivotTable.PivotFields("Region");
regionField.Orientation = Excel.XlPivotFieldOrientation.xlColumnField;
regionField.Position = 1;
Excel.PivotField salesField = (Excel.PivotField)pivotTable.PivotFields("Sales");
pivotTable.AddDataField(salesField, "Sum of Sales", Excel.XlConsolidationFunction.xlSum);

// Save and cleanup
xlWorkbook.SaveAs(@"C:\Data\PivotReport.xlsx");
xlWorkbook.Close();
xlApp.Quit();

// Release COM objects to prevent memory leaks
Marshal.ReleaseComObject(pivotTable);
Marshal.ReleaseComObject(pivotCache);
Marshal.ReleaseComObject(xlPivotSheet);
Marshal.ReleaseComObject(xlSheet);
Marshal.ReleaseComObject(xlWorkbook);
Marshal.ReleaseComObject(xlApp);

IRON VB CONVERTER ERROR developers@ironsoftware.com

この Interop の例では、Product を行に、Region を列に、Sales をデータ領域に合計した Excel ネイティブのピボット・テーブルを作成します。 機能的ではありますが、このアプローチではMicrosoft Officeのインストールと注意深いCOMオブジェクトの管理が必要です。 最新の開発でこのアプローチを使用しない理由については、Microsoftのドキュメントを参照してください。

最新の方法で XLSX または XLS ピボットテーブルをプログラムで作成する方法

using IronXL;
using System.Linq;
using System.Data; // Keep this namespace
using static System.Data.DataTableExtensions; // Use 'using static' for DataTableExtensions

class Program
{
    static void Main(string[] args)
    {
        // Load Excel file - no Office required
        WorkBook workbook = WorkBook.Load("SalesData.xlsx");
        WorkSheet dataSheet = workbook.WorkSheets[0];
        // Convert to DataTable for powerful manipulation
        var dataTable = dataSheet.ToDataTable(true); // true = use first row as column headers
        // Create pivot-style aggregation using LINQ
        var pivotData = dataTable.AsEnumerable()
            .GroupBy(row => new {
                Product = row["Product"].ToString(),
                Region = row["Region"].ToString()
            }) //range
            .Select(g => new {
                Product = g.Key.Product,
                Region = g.Key.Region,
                TotalSales = g.Sum(row => Convert.ToDecimal(row["Sales"])),
                AverageSale = g.Average(row => Convert.ToDecimal(row["Sales"])),
                Count = g.Count()
            });
        // Create pivot report worksheet
        WorkSheet pivotSheet = workbook.CreateWorkSheet("PivotReport");
        // Build cross-tabulation structure
        var products = pivotData.Select(p => p.Product).Distinct().OrderBy(p => p);
        var regions = pivotData.Select(p => p.Region).Distinct().OrderBy(r => r);
        // Create headers
        pivotSheet["A1"].Value = "Product/Region";
        int col = 2;
        foreach (var region in regions)
        {
            pivotSheet[$"{(char)('A' + col - 1)}1"].Value = region; // string
            col++;
        }
        // Populate pivot data
        int row = 2;
        foreach (var product in products)
        {
            pivotSheet[$"A{row}"].Value = product;
            col = 2;
            foreach (var region in regions)
            {
                var sales = pivotData
                    .Where(p => p.Product == product && p.Region == region)
                    .Select(p => p.TotalSales)
                    .FirstOrDefault();
                pivotSheet[$"{(char)('A' + col - 1)}{row}"].Value = sales;
                col++;
            }
            row++;
        }
        // Add totals using Excel formulas
        pivotSheet[$"A{row}"].Value = "Total"; // grand totals
        for (int c = 2; c <= regions.Count() + 1; c++)
        {
            pivotSheet[$"{(char)('A' + c - 1)}{row}"].Formula = $"=SUM({(char)('A' + c - 1)}2:{(char)('A' + c - 1)}{row - 1})";
        }
        // Proceeding to apply formatting
        var dataRange = pivotSheet[$"B2:{(char)('A' + regions.Count())}{row}"];
        dataRange.FormatString = "$#,##0.00";
        workbook.SaveAs("PivotReport.xlsx");
    }
}

using IronXL;
using System.Linq;
using System.Data; // Keep this namespace
using static System.Data.DataTableExtensions; // Use 'using static' for DataTableExtensions

class Program
{
    static void Main(string[] args)
    {
        // Load Excel file - no Office required
        WorkBook workbook = WorkBook.Load("SalesData.xlsx");
        WorkSheet dataSheet = workbook.WorkSheets[0];
        // Convert to DataTable for powerful manipulation
        var dataTable = dataSheet.ToDataTable(true); // true = use first row as column headers
        // Create pivot-style aggregation using LINQ
        var pivotData = dataTable.AsEnumerable()
            .GroupBy(row => new {
                Product = row["Product"].ToString(),
                Region = row["Region"].ToString()
            }) //range
            .Select(g => new {
                Product = g.Key.Product,
                Region = g.Key.Region,
                TotalSales = g.Sum(row => Convert.ToDecimal(row["Sales"])),
                AverageSale = g.Average(row => Convert.ToDecimal(row["Sales"])),
                Count = g.Count()
            });
        // Create pivot report worksheet
        WorkSheet pivotSheet = workbook.CreateWorkSheet("PivotReport");
        // Build cross-tabulation structure
        var products = pivotData.Select(p => p.Product).Distinct().OrderBy(p => p);
        var regions = pivotData.Select(p => p.Region).Distinct().OrderBy(r => r);
        // Create headers
        pivotSheet["A1"].Value = "Product/Region";
        int col = 2;
        foreach (var region in regions)
        {
            pivotSheet[$"{(char)('A' + col - 1)}1"].Value = region; // string
            col++;
        }
        // Populate pivot data
        int row = 2;
        foreach (var product in products)
        {
            pivotSheet[$"A{row}"].Value = product;
            col = 2;
            foreach (var region in regions)
            {
                var sales = pivotData
                    .Where(p => p.Product == product && p.Region == region)
                    .Select(p => p.TotalSales)
                    .FirstOrDefault();
                pivotSheet[$"{(char)('A' + col - 1)}{row}"].Value = sales;
                col++;
            }
            row++;
        }
        // Add totals using Excel formulas
        pivotSheet[$"A{row}"].Value = "Total"; // grand totals
        for (int c = 2; c <= regions.Count() + 1; c++)
        {
            pivotSheet[$"{(char)('A' + c - 1)}{row}"].Formula = $"=SUM({(char)('A' + c - 1)}2:{(char)('A' + c - 1)}{row - 1})";
        }
        // Proceeding to apply formatting
        var dataRange = pivotSheet[$"B2:{(char)('A' + regions.Count())}{row}"];
        dataRange.FormatString = "$#,##0.00";
        workbook.SaveAs("PivotReport.xlsx");
    }
}

IRON VB CONVERTER ERROR developers@ironsoftware.com

したがって、2025年にはこうしてピボットテーブルを作成します。

出力

How to Create Pivot Table in Excel Using C# Interop vs IronXL: Image 1 - 元のExcelファイルと作成したピボットテーブルの比較。