在C＃中将xls和xlsx转换为Datatable

Question

我正在努力将xls和xlsx转换为c＃中的datatable。 我用过这段代码。

public DataTable ReadDataExcel(string filepath)
    {
        FileStream stream = File.Open(filepath, FileMode.Open, FileAccess.Read);
        IExcelDataReader excelReader = ExcelReaderFactory.CreateBinaryReader(stream);
        excelReader.IsFirstRowAsColumnNames = true;
        DataSet result = excelReader.AsDataSet();
        DataTable dt = new DataTable();
        dt = result.Tables[0];
        return dt;
    }

在xls的情况下，它的工作正常。 每当我使用xlsx它不工作。 它给出了“对象引用”错误。

是否有任何其他方法将xls和xlsx转换为datatable。 我对使用'Microsoft.Jet.OLEDB'不感兴趣....

Answer 1

这就是答案。

要导入xlsx，

IExcelDataReader excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream);

要导入xls，

IExcelDataReader excelReader = ExcelReaderFactory.CreateBinaryReader(stream);

Answer 2

从nudget添加EPPlus dll。 将excel文件内容添加到内存流。 然后你可以按照下面的代码使用。

ExcelPackage package = new ExcelPackage(stream);
ExcelWorksheet workSheet = package.Workbook.Worksheets.First();

Answer 3

 public static DataTable MakeDataTablefromxls(string _path, string password = "")
    {
        DataTable dt = new DataTable();
        try
        {
            log.Info("MakeDataTablefromxls : Excel scraping started");
            xlsApp = new Microsoft.Office.Interop.Excel.Application();
            if (xlsApp == null)
            {
                return null;
            }
            wb = xlsApp.Workbooks.Open(_path, 0, true, 5, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true);
            sheets = wb.Worksheets;
            ws = (Excel.Worksheet)sheets.get_Item(1);
            range = ws.UsedRange;
            if (wb.ProtectStructure)
            {
                wb.Unprotect(password);
            }

            object[,] values = (object[,])range.Cells.Value;

            //To Create columns of DataTable as per column  range in xlxs sheet
            for (int i = 1; i <= values.GetLength(1); i++)
            {
                dt.Columns.Add("F" + (i));
            }

            //To Create rows of DataTable as per column  range in xlxs sheet
            for (int i = 2; i < values.GetLength(1); i++)
            {
                DataRow row = dt.NewRow();
                for (int j = 1; j < values.GetLength(1); j++)
                {
                    row[j - 1] = values[i, j];// assigning Data from object array to data Datarow 
                }
                dt.Rows.Add(row);
            }
            return dt;
        }
        catch (Exception ex)
        {
            log.Error("MakeDataTablefromxls : error : ", ex);
            return null;
        }
        finally
        {
            wb.Close(false, System.Reflection.Missing.Value, System.Reflection.Missing.Value);
            xlsApp.Quit();
            GC.Collect();
            if (range != null) Marshal.FinalReleaseComObject(range);
            if (wb != null) Marshal.FinalReleaseComObject(wb);
            if (sheets != null) Marshal.FinalReleaseComObject(sheets);
            if (xlsApp != null) Marshal.FinalReleaseComObject(xlsApp);
            GC.WaitForPendingFinalizers();
            GC.Collect();
            GC.WaitForPendingFinalizers();
            dt.Dispose();
            log.Info("MakeDataTablefromxls : Excel scraping completed");
        }
    }