通过打开的xml sdk linq查询获取具有行和列位置的excel单元格值

using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
using System;
using System.Linq;

public class ExcelHelper
{
    public static string GetCellValueWithPosition(string filePath, string sheetName, int rowNumber, int columnNumber)
    {
        using (SpreadsheetDocument spreadsheetDocument = SpreadsheetDocument.Open(filePath, false))
        {
            WorkbookPart workbookPart = spreadsheetDocument.WorkbookPart;
            Sheet sheet = workbookPart.Workbook.Descendants<Sheet>().FirstOrDefault(s => s.Name == sheetName);
            
            if (sheet == null)
            {
                throw new Exception("Sheet not found");
            }
            
            WorksheetPart worksheetPart = (WorksheetPart)workbookPart.GetPartById(sheet.Id);
            Worksheet worksheet = worksheetPart.Worksheet;
            
            Cell cell = worksheet.Descendants<Cell>()
                .FirstOrDefault(c => GetColumnNumberFromColumnName(GetColumnName(c.CellReference)) == columnNumber && GetRowNumberFromCellReference(c.CellReference) == rowNumber);
            
            if (cell == null)
            {
                throw new Exception("Cell not found");
            }
            
            return GetCellValue(cell, workbookPart);
        }
    }
    
    private static string GetCellValue(Cell cell, WorkbookPart workbookPart)
    {
        string value = cell.InnerText;
        
        if (cell.DataType != null && cell.DataType.Value == CellValues.SharedString)
        {
            SharedStringTablePart sharedStringTablePart = workbookPart.GetPartsOfType<SharedStringTablePart>().FirstOrDefault();
            
            if (sharedStringTablePart != null)
            {
                value = sharedStringTablePart.SharedStringTable.ElementAt(int.Parse(value)).InnerText;
            }
        }
        
        return value;
    }
    
    private static string GetColumnName(string cellReference)
    {
        return new string(cellReference.Where(c => char.IsLetter(c)).ToArray());
    }
    
    private static int GetColumnNumberFromColumnName(string columnName)
    {
        int columnNumber = 0;
        int mulitplier = 1;
        
        foreach (char c in columnName.Reverse())
        {
            columnNumber += (c - 'A' + 1) * mulitplier;
            mulitplier *= 26;
        }
        
        return columnNumber;
    }
    
    private static int GetRowNumberFromCellReference(string cellReference)
    {
        return int.Parse(new string(cellReference.Where(c => char.IsDigit(c)).ToArray()));
    }
}

string filePath = "path/to/excel/file.xlsx";
string sheetName = "Sheet1";
int rowNumber = 2;
int columnNumber = 3;

string cellValue = ExcelHelper.GetCellValueWithPosition(filePath, sheetName, rowNumber, columnNumber);
Console.WriteLine("Cell value: " + cellValue);