对于数据量较大的表格，需要计算一些特殊数值时，我们通过运用公式能有效提高我们数据处理的速度和效率，对于后期数据的增删改查等的批量操作也很方便。此外，对于某些数值的信息来源，我们也可以通过读取数据中包含的公式来获取。下面的示例中将分享通过C# 来创建、读取Excel公式的方法。

工具使用

• Spire.XLS for .NET 8.0
  下载安装该类库后，注意在程序中添加引用Spire.Xls.dll（dll文件可在安装路径下的Bin文件夹中获取）
  
  代码示例（供参考）

  【示例1】创建Excel公式

  C#

using Spire.Xls;namespace CreateFormula
{class Program{static void Main(string[] args){//新建一个工作簿，获取第一个工作表Workbook workbook = new Workbook();Worksheet sheet = workbook.Worksheets[0];//初始化currentRow、currentFormulaint currentColumn = 1;int currentRow = 1;string currentFormula = string.Empty;//设置1、2列列宽sheet.SetColumnWidth(1, 20);sheet.SetColumnWidth(2, 12);//写入测试数据sheet.Range[currentColumn, 1].Value = "测试数据：";sheet.Range[currentColumn, 2].NumberValue = 10;sheet.Range[currentColumn, 3].NumberValue = 20; sheet.Range[currentColumn, 4].NumberValue = 30;sheet.Range[currentColumn, 5].NumberValue = 40;sheet.Range[currentColumn, 6].NumberValue = 50;//写入文本并设置区域格式currentRow += 2;sheet.Range[currentRow, 1].Value = "公式"; sheet.Range[currentRow, 2].Value = "结果";CellRange range = sheet.Range[currentRow, 1, currentRow, 2];range.Style.Font.IsBold = true;range.Style.KnownColor = ExcelColors.LightGreen1;range.Style.FillPattern = ExcelPatternType.Solid;range.Style.Borders[BordersLineType.EdgeBottom].LineStyle = LineStyleType.Medium;//算术运算currentFormula = "=1/2+3*4";sheet.Range[++currentRow, 1].Text = currentFormula;sheet.Range[currentRow, 2].Formula = currentFormula;//日期函数currentFormula = "=Today()";sheet.Range[++currentRow, 1].Text = currentFormula;sheet.Range[currentRow, 2].Formula = currentFormula;sheet.Range[currentRow, 2].Style.NumberFormat = "YYYY/MM/DD";//时间函数currentFormula = "=NOW()";sheet.Range[++currentRow, 1].Text = currentFormula;sheet.Range[currentRow, 2].Formula = currentFormula;sheet.Range[currentRow, 2].Style.NumberFormat = "H:MM AM/PM";//IF逻辑函数currentFormula = "=IF(B1=5,\"Yes\",\"No\")";sheet.Range[++currentRow, 1].Text = currentFormula;sheet.Range[currentRow, 2].Formula = currentFormula;//PI函数currentFormula = "=PI()";sheet.Range[++currentRow, 1].Text = currentFormula;sheet.Range[currentRow, 2].Formula = currentFormula;//三角函数currentFormula = "=SIN(PI()/6)";sheet.Range[++currentRow, 1].Text = currentFormula;sheet.Range[currentRow, 2].Formula = currentFormula;//计数函数currentFormula = "=Count(B1:F1)";sheet.Range[++currentRow, 1].Text = currentFormula;sheet.Range[currentRow, 2].Formula = currentFormula;//求最大值函数currentFormula = "=MAX(B1:F1)";sheet.Range[++currentRow, 1].Text = currentFormula;sheet.Range[currentRow, 2].Formula = currentFormula;//平均值函数currentFormula = "=AVERAGE(B1:F1)";sheet.Range[++currentRow, 1].Text = currentFormula;sheet.Range[currentRow, 2].Formula = currentFormula;//求和函数currentFormula = "=SUM(B1:F1)";sheet.Range[++currentRow, 1].Text = currentFormula;sheet.Range[currentRow, 2].Formula = currentFormula;//保存文档并打开workbook.SaveToFile("Excel公式.xlsx", FileFormat.Version2013);System.Diagnostics.Process.Start("Excel公式.xlsx");}}
}

公式创建结果（如下图）：

【示例2】读取Excel公式

C#

using Spire.Xls;
using System;namespace ReadFormula
{class Program{static void Main(string[] args){//实例化一个WorkbookWorkbook workbook = new Workbook();//加载测试文档workbook.LoadFromFile("test.xlsx");//获取第一个工作表Worksheet sheet = workbook.Worksheets[0];//遍历[B1：B13]的单元格foreach (var cell in sheet.Range["B1:B13"]){//判断是否含有公式if (cell.HasFormula){//输出含有公式的单元格及公式string certainCell = String.Format("Cell[{0},{1}]", cell.Row, cell.Column);Console.WriteLine(certainCell + " 含有公式： " + cell.Formula);}}Console.ReadLine();}}
}

公式读取结果（如下图）

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