使用 EPPLus 将 CSV 或 XLSX 导入数据表

Question

我在 SO 上找到了一个线程，正在尝试将 csv 或 xls 或 xlsx 导入 C# DataTable - 但我收到以下堆栈跟踪错误：

    System.Runtime.InteropServices.COMException
  HResult=0x8003001D
  Message=A disk error occurred during a write operation. (Exception from HRESULT: 0x8003001D (STG_E_WRITEFAULT))
  Source=EPPlus

这是我尝试用来导入文件的代码 - 我需要更改什么才能正常执行？

        private OpenFileDialog openFileDialog1 = new OpenFileDialog();
    public static DataTable GetDataTableFromExcel(string path, bool hasHeader = true)
    {
        using (var pck = new OfficeOpenXml.ExcelPackage())
        {
            using (var stream = File.OpenRead(path))
            {
                pck.Load(stream);
            }
            var ws = pck.Workbook.Worksheets.First();
            DataTable tbl = new DataTable();
            foreach (var firstRowCell in ws.Cells[1, 1, 1, ws.Dimension.End.Column])
            {
                tbl.Columns.Add(hasHeader ? firstRowCell.Text : string.Format("Column {0}", firstRowCell.Start.Column));
            }
            var startRow = hasHeader ? 2 : 1;
            for (int rowNum = startRow; rowNum <= ws.Dimension.End.Row; rowNum++)
            {
                var wsRow = ws.Cells[rowNum, 1, rowNum, ws.Dimension.End.Column];
                DataRow row = tbl.Rows.Add();
                foreach (var cell in wsRow)
                {
                    row[cell.Start.Column - 1] = cell.Text;
                }
            }
            return tbl;
        }
    }

    private void btnImportSpreadsheet_Click(object sender, EventArgs e)
    {
        DataTable spreadsheetImport = new DataTable();
        openFileDialog1.Filter = "Excel Files|*.xls;*.xlsx;*.csv;";
        DialogResult result = openFileDialog1.ShowDialog();

        if (result == DialogResult.OK)
        {
            string file = openFileDialog1.FileName;
            spreadsheetImport = GetDataTableFromExcel(file);
        }
    }

Answer 1

要使用 csv，您必须使用 LoadFromText。另请注意，EPPlus 不能与 xls 一起使用，它可以读取 xlsx 和 xlsm 并写入 xlsx。

char csvDelimiter = ';';
using(var pck = new ExcelPackage())
{
    ExcelWorksheet ws = null;
    if(path.EndsWith(".csv"))
    {
        ws = pck.Workbook.Worksheets.Add("Sheet1");
        ExcelTextFormat format = new ExcelTextFormat()
        {
            Delimiter = csvDelimiter 
        };
        ws.Cells[1, 1].LoadFromText(File.ReadAllText(path), format);
    }
    else
    {
        using (var stream = File.OpenRead(path))
        {
            pck.Load(stream);
        }
        ws = pck.Workbook.Worksheets.First();
    }

    //The rest of your code

}

另一种选择是使用 ExcelDataReader, as it can read xls, xlsx and csv, but cannot write. It has an extension that converts a file to a DataSet

使用 EPPLus 将 CSV 或 XLSX 导入数据表

Import a CSV or XLSX Into A DataTable Using EPPLus

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