如何读取列在单行中重复的excel文件并将它们转换为数据表

Question

我需要导入一个 Excel 表格并读取数据并将此数据添加到 ASP.NET Core MVC 中的数据库中。

我的桌子是这样的：

当我有 excel 这种格式的数据时：

我能够读取数据并将其添加到数据库中。

但我的 Excel 表格是这样填写的：

其中日期是 Day，Score 和 CutOf 位于单列标题中，并且这些在单行中重复。

那么如何读取并将它们转换为每个人的行基础并将它们添加到数据库中？

var dt = new DataTable();

//Checking file content length and Extension must be .xlsx
if (file != null && file.ContentType.Length > 0 && System.IO.Path.GetExtension(file.FileName).ToLower() == ".xlsx")
{
    //Create a Folder.
    string path = Path.Combine(hostingEnv.WebRootPath, "Uploads");
    
    if (!Directory.Exists(path))
    {
        Directory.CreateDirectory(path);
    }
    
    //Save the uploaded Excel file.
    string fileName = Path.GetFileName(file.FileName);
    string filePath = Path.Combine(path, fileName);

    using (var stream = new FileStream(filePath, FileMode.Create))
    {
        file.CopyTo(stream);
    }
    
    using (var workbook = new XLWorkbook(filePath))
    {
        IXLWorksheet worksheet = workbook.Worksheet(1);
        bool FirstRow = true;

        //Range for reading the cells based on the last cell used.
        string readRange = "1:1";
        
        foreach (IXLRow row in worksheet.RowsUsed())
        {
            //If Reading the First Row (used) then add them as column name
            if (FirstRow)
            {
                //Checking the Last cellused for column generation in datatable
                readRange = string.Format("{0}:{1}", 1, row.LastCellUsed().Address.ColumnNumber);
                
                foreach (IXLCell cell in row.Cells(readRange))
                {
                    dt.Columns.Add(cell.Value.ToString());
                }
                
                FirstRow = false;
            }
            else
            {
                //Adding a Row in datatable
                dt.Rows.Add();
                int cellIndex = 0;
                
                //Updating the values of datatable
                foreach (IXLCell cell in row.Cells(readRange))
                {
                    dt.Rows[dt.Rows.Count - 1][cellIndex] = cell.Value.ToString();
                    cellIndex++;
                }
            }
        }
        
        //If no data in Excel file
        if (FirstRow)
        {
            ViewBag.Message = "Empty Excel File!";
        }

Answer 1

由于您拥有动态数量的列，因此实际上只需遍历列并获取值即可。我在我的机器上重新创建了这个。

using System;
using System.Collections.Generic;
using ClosedXML.Excel;

namespace HelloDotNetCore
{
    class Program
    {
        static void Main(string[] args)
        {
            var scoreResults = new List<ScoreResult>();

            using (var workbook = new XLWorkbook("Scores.xlsx"))
            {
                var isHeaderRow = true;

                foreach (var row in workbook.Worksheet(1).RowsUsed())
                {
                    if (isHeaderRow)
                    {
                        isHeaderRow = false;
                        continue;
                    }

                    var name = row.Cell(1).GetString();

                    // This goes through the Date, Score column pairs until the end is reached for that row
                    for (int i = 2; i <= row.LastCellUsed().Address.ColumnNumber; i+=2)
                    {
                        Console.WriteLine(row.Cell(i).GetString());

                        var scoreResult = new ScoreResult
                        {
                            Name = name,
                            DateTaken = row.Cell(i).GetDateTime(),
                            Score = row.Cell(i + 1).GetValue<int>(),
                        };

                        scoreResults.Add(scoreResult);
                    }
                }
            }

            foreach (var s in scoreResults)
            {
                Console.WriteLine($"Name: {s.Name}, DateTaken: {s.DateTaken}, Score: {s.Score}");
            }
        }
    }

    class ScoreResult
    {
        public string Name { get; set; }

        public DateTime DateTaken { get; set; }

        public int Score { get; set; }
    }
}

注意它如何获取分数并将它们存储在列表中以供以后使用？这比使用 DataTable 要好得多。