如何使用OpenXml和c#从区域中获取所有行/单元格值

using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;

public static List<List<string>> GetValuesFromRange(string filePath, string sheetName, string range)
{
    List<List<string>> values = new List<List<string>>();

    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)
        {
            WorksheetPart worksheetPart = (WorksheetPart)workbookPart.GetPartById(sheet.Id);
            Worksheet worksheet = worksheetPart.Worksheet;
            SheetData sheetData = worksheet.GetFirstChild<SheetData>();

            string[] rangeParts = range.Split(':');
            string startCellReference = rangeParts[0];
            string endCellReference = rangeParts[1];

            IEnumerable<Cell> cells = sheetData.Descendants<Cell>()
                .Where(c => string.Compare(c.CellReference.Value, startCellReference) >= 0 &&
                            string.Compare(c.CellReference.Value, endCellReference) <= 0);

            foreach (Cell cell in cells)
            {
                string cellValue = GetCellValue(cell, workbookPart);
                string cellReference = cell.CellReference.Value;

                int rowIndex = GetRowIndex(cellReference);
                int columnIndex = GetColumnIndex(cellReference);

                if (values.Count <= rowIndex)
                {
                    values.Add(new List<string>());
                }

                while (values[rowIndex].Count < columnIndex)
                {
                    values[rowIndex].Add("");
                }

                values[rowIndex].Add(cellValue);
            }
        }
    }

    return values;
}

private static string GetCellValue(Cell cell, WorkbookPart workbookPart)
{
    string cellValue = "";

    if (cell.DataType != null && cell.DataType.Value == CellValues.SharedString)
    {
        SharedStringTablePart sharedStringTablePart = workbookPart.GetPartsOfType<SharedStringTablePart>().FirstOrDefault();
        if (sharedStringTablePart != null)
        {
            SharedStringItem sharedStringItem = sharedStringTablePart.SharedStringTable.Elements<SharedStringItem>().ElementAt(int.Parse(cell.CellValue.Text));
            if (sharedStringItem != null)
            {
                cellValue = sharedStringItem.Text.Text;
            }
        }
    }
    else
    {
        cellValue = cell.CellValue?.Text ?? "";
    }

    return cellValue;
}

private static int GetRowIndex(string cellReference)
{
    string rowIndex = Regex.Replace(cellReference, "[^0-9]+", "");
    return int.Parse(rowIndex) - 1;
}

private static int GetColumnIndex(string cellReference)
{
    string columnName = Regex.Replace(cellReference, "[^A-Z]+", "");
    int columnIndex = 0;
    int factor = 1;

    for (int i = columnName.Length - 1; i >= 0; i--)
    {
        columnIndex += (columnName[i] - 'A' + 1) * factor;
        factor *= 26;
    }

    return columnIndex - 1;
}

string filePath = "路径/文件名.xlsx";
string sheetName = "工作表名称";
string range = "起始单元格:结束单元格";

List<List<string>> values = GetValuesFromRange(filePath, sheetName, range);

foreach (List<string> row in values)
{
    foreach (string cellValue in row)
    {
        Console.Write(cellValue + "\t");
    }
    Console.WriteLine();
}