如何使用C＃獲取保存在Excel工作表中的確切值？

Question

我在Excel工作表的單元格中輸入DateTime.Now.ToUniversalTime().ToLongTimeString()並在保存后將其關閉，但是在再次打開同一Excel工作表並嘗試獲取其單元格值時， DateTime.Now.ToUniversalTime().ToLongTimeString()了我一些雙重價值。

我的C＃代碼：

在構造函數中：

Excel.Application xlApp;
       Excel.Workbook xlWorkBook;
       Excel.Worksheet xlWorkSheet, xlWorkSheet2, xlWorkSheet3;
       object misValue = System.Reflection.Missing.Value;
       Excel.Range range;
       xlWorkBook = xlApp.Workbooks.Open(
                                    "Book1.xls",
                                    0,
                                    true,
                                    misValue,
                                    "",
                                    "",
                                    true,
                                    Excel.XlPlatform.xlWindows,
                                    "\t",
                                    false,
                                    false,
                                    0,
                                    true,
                                    1,
                                    0);

xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

((Excel.Range)xlWorkSheet.Cells[1, 5]).EntireColumn.NumberFormat = "H:mm:ss";
xlWorkSheet.Cells[(rowcnt + 1), 5] = DateTime.Now.ToUniversalTime().ToLongTimeString();

xlWorkBook.SaveAs("Book2.xls",Excel.XlFileFormat.xlOpenXMLWorkbook);                

//Close the Excel Workbook after saving a copy of it.
xlWorkBook.Close(true, misValue, misValue);

xlApp.Quit();

Marshal.ReleaseComObject(xlWorkSheet);

Marshal.ReleaseComObject(xlWorkBook);

Marshal.ReleaseComObject(xlApp);

xlWorkBook = null;

//Make the Excel Application null.
xlApp = null;

然后調用以下方法獲取單元格值。

private void AddXMLDetail()
        {
            try
            {
                xlApp = new Excel.ApplicationClass();

                #region Open the Excel File

                //Assigning the saved changes workbook present in 
                //"My Document" to add the xml detail in excel sheet.
                xlWorkBook =
                    xlApp.Workbooks.Open(
                            "Book2.xls",
                            Type.Missing,
                            Type.Missing,
                            Type.Missing,
                            Type.Missing,
                            Type.Missing,
                            Type.Missing,
                            Type.Missing,
                            Type.Missing,
                            Type.Missing,
                            Type.Missing,
                            Type.Missing,
                            Type.Missing,
                            Type.Missing,
                            Type.Missing);

                #endregion Open the Excel File.

                //Assigning Sheet 1.
                xlWorkSheet =
                    (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

                string compareTime =
                        ((Excel.Range)range.Cells[1, 5]).Value2.ToString();

                Console.WriteLine("The saved cell value is : " + compareTime);

                #region Close and Release the object.

                //Close the Excel Workbook after saving a copy of it.
                xlWorkBook.Close(true, misValue, misValue);

                Marshal.ReleaseComObject(xlWorkSheet);
                Marshal.ReleaseComObject(xlWorkBook);

                xlWorkBook = null;

                //Quit The Excel Application after success completion of work.
                xlApp.Quit();               

                //Release the Excel Application for reuse.
                Marshal.ReleaseComObject(xlApp);

                //Make the Excel Application null.
                xlApp = null;

                #endregion Close and Release the object.
            }
            catch (Exception ex)
            {
                Console.WriteLine("exception was : " + ex);
            }
        }

誰能告訴我我在哪里做錯了嗎？任何答案都將不勝感激。

Answer 1

使單元格numberFormat為Text

((Excel.Range)xlWorkSheet.Cells[1,5]).EntireColumn.NumberFormat = "@";

然后嘗試像現在一樣將相同的值獲取到字符串變量。