C#代码实现添加或读取Excel公式的完整指南

Install-Package FreeSpire.XLS

using Spire.Xls;

Workbook workbook = new Workbook();
Worksheet sheet = workbook.Worksheets[0];

// 添加基础数值数据
sheet.Range[1, 1].NumberValue = 1;
sheet.Range[1, 2].NumberValue = 2;
sheet.Range[1, 3].NumberValue = 3;
sheet.Range[1, 4].NumberValue = 4;
sheet.Range[1, 5].NumberValue = 4;
sheet.Range[1, 6].NumberValue = 6;

// 添加函数公式：AVERAGE 平均值
string averageFormula = "=AVERAGE(Sheet1!$A$1:A$6)";
sheet.Range[2, 1].Formula = averageFormula;

// 添加算术运算公式
string calcFormula = "=1+2+3+4+5-6-7+8-9";
sheet.Range[3, 1].Formula = calcFormula;

workbook.SaveToFile("AddFormulasAndFunctions.xlsx", ExcelVersion.Version2016);
workbook.Dispose();

using Spire.Xls;
using System.IO;
using System.Text;

Workbook workbook = new Workbook();
workbook.LoadFromFile("Formulas.xlsx");

Worksheet sheet = workbook.Worksheets[0];
StringBuilder sb = new StringBuilder();
CellRange usedRange = sheet.AllocatedRange;

foreach (CellRange cell in usedRange)
{
    if (cell.HasFormula)
    {
        string cellName = cell.RangeAddressLocal;
        string formula = cell.Formula;
        sb.AppendLine($"{cellName} 包含公式: {formula}");
    }
}

File.WriteAllText("ReadFormulasAndFunctions.txt", sb.ToString());

// EPPlus
using OfficeOpenXml;
ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
using (var package = new ExcelPackage())
{
    var sheet = package.Workbook.Worksheets.Add("Sheet1");
    sheet.Cells["A1"].Value = 100;
    sheet.Cells["B1"].Formula = "A1*2"; // 设置公式
    package.SaveAs(new FileInfo("formula.xlsx"));
}
// ClosedXML
using ClosedXML.Excel;
using (var workbook = new XLWorkbook())
{
    var worksheet = workbook.Worksheets.Add("Sheet1");
    worksheet.Cell("A1").Value = 100;
    worksheet.Cell("B1").FormulaA1 = "=A1*2"; // 设置公式
    workbook.SaveAs("formula.xlsx");
}
// NPOI
using NPOI.XSSF.UserModel;
using NPOI.SS.UserModel;
var workbook = new XSSFWorkbook();
var sheet = workbook.CreateSheet("Sheet1");
var row = sheet.CreateRow(0);
row.CreateCell(0).SetCellValue(100); // 必须先创建行
row.CreateCell(1).SetCellFormula("A1*2"); // 设置公式
using (var fs = new FileStream("formula.xlsx", FileMode.Create))
    workbook.Write(fs);
// Aspose.Cells
using Aspose.Cells;
var workbook = new Workbook();
var worksheet = workbook.Worksheets[0];
worksheet.Cells["A1"].PutValue(100);
worksheet.Cells["B1"].Formula = "=A1*2"; // 设置公式
workbook.Save("formula.xlsx");

// EPPlus: 读取单元格中的公式
string formula = worksheet.Cells["B1"].Formula;
// ClosedXML: 通过 FormulaA1 属性读取公式字符串
string formula = worksheet.Cell("B1").FormulaA1;
// NPOI: 获取包含公式的单元格
ICell cell = sheet.GetRow(0).GetCell(1);
string formula = cell.CellFormula; // 读取公式文本
// Aspose.Cells: 从单元格获取公式字符串
string formula = worksheet.Cells["B1"].Formula;

// EPPlus: 获取公式计算结果
object result = worksheet.Cells["B1"].Value;
// ClosedXML: 获取公式计算结果
object result = worksheet.Cell("B1").Value;
// NPOI: 先通过公式求值器计算，再读取结果
var evaluator = new XSSFFormulaEvaluator(workbook);
ICell cell = sheet.GetRow(0).GetCell(1);
evaluator.EvaluateInCell(cell);
double result = cell.NumericCellValue; // 读取计算结果
// Aspose.Cells: 计算结果自动更新，直接读取
object result = worksheet.Cells["B1"].Value;