快速从Excel中读取数据

我有下面的代码从Excel工作表中读取数据，并将其转换为pipe道分隔文本文件。 有用。 问题在于它非常慢，因为我必须一次读取1个单元格以添加到pipe道中。

我想知道是否有更好的方法来做到这一点，即一步读取数据到内存/数组，并在那里采取行动。

public string Process(string filename) { Excel.Application xlApp; Excel.Workbook xlWorkBook; Excel.Worksheet xlWorkSheet; Excel.Range range; string str = ""; int rCnt = 0; int cCnt = 0; object misValue = System.Reflection.Missing.Value; xlApp = new Excel.Application(); xlWorkBook = xlApp.Workbooks.Open(filename, 0, true, 5, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0); xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1); //Use the 1st worksheet StreamWriter sw = new StreamWriter(destpath); range = xlWorkSheet.UsedRange; for (rCnt = 1; rCnt <= range.Rows.Count; rCnt++) { if ((rCnt % 1000) == 0) { txtProgress.Text = "Rows processed: "+ rCnt; } for (cCnt = 1; cCnt <= range.Columns.Count; cCnt++) { str = str + ToStr((range.Cells[rCnt, cCnt] as Excel.Range).Value2) + "|"; } sw.WriteLine(str); str = ""; } xlWorkBook.Close(true, null, null); xlApp.Quit(); sw.Close(); releaseObject(xlWorkSheet); releaseObject(xlWorkBook); releaseObject(xlApp); MessageBox.Show("Complete","Status"); return "Success"; } public static string ToStr(object readField) { if ((readField != null)) { if (readField.GetType() != typeof(System.DBNull)) { return Convert.ToString(readField); } else { return ""; } } else { return ""; } } private void releaseObject(object obj) { try { System.Runtime.InteropServices.Marshal.ReleaseComObject(obj); obj = null; } catch (Exception ex) { obj = null; MessageBox.Show("Unable to release the Object " + ex.ToString()); } finally { GC.Collect(); } } 

Answer 1

如果你打算只对excel文件内容进行读取，我build议你使用ExcelDataReader库链接 ，它将工作表数据提取到一个DataSet对象中。

  static void Main(string[] args) { IExcelDataReader reader = null; string FilePath = "PathToExcelFile"; //Load file into a stream FileStream stream = File.Open(FilePath, FileMode.Open, FileAccess.Read); //Must check file extension to adjust the reader to the excel file type if (System.IO.Path.GetExtension(FilePath).Equals(".xls")) { reader = ExcelReaderFactory.CreateBinaryReader(stream); } else if (System.IO.Path.GetExtension(FilePath).Equals(".xlsx")) { reader = ExcelReaderFactory.CreateBinaryReader(stream); } if (reader != null) { //Fill DataSet System.Data.DataSet result = reader.AsDataSet(); try { //Loop through rows for the desired worksheet //In this case I use the table index "0" to pick the first worksheet in the workbook foreach (DataRow row in result.Tables[0].Rows) { string FirstColumn = row[0].ToString(); } } catch { } } } 

Answer 2

你可以使用LinqToExcel nuget包

https://www.nuget.org/packages/LinqToExcel/1.10.1

示例代码：

 string path = @"Users.xlsx"; var excel = new ExcelQueryFactory(path); return (from c in excel.Worksheet<User>() select c).OrderBy(a => a.Name).ToList();