将WPF DataGrid导出到Excel

当我将DataGrid导出到Excel时，为什么我的值会更改

string351732051316944变成3,51732E + 14

和我的date时间：2014-01-01 02：09：29.942变成41641,09035

我该如何让它停止？

我使用ExportToExcel的类

public class ExportToExcel<T> { public List<T> dataToPrint; // Excel object references. private Microsoft.Office.Interop.Excel.Application excelApp = null; private Workbooks books = null; private Workbook book = null; private Sheets sheets = null; private Worksheet sheet = null; private Range range = null; private Font font = null; // Optional argument variable private object optionalValue = Missing.Value; /// Generate report and sub functions public void GenerateReport() { try { if (dataToPrint != null) { if (dataToPrint.Count != 0) { Mouse.SetCursor(Cursors.Wait); CreateExcelRef(); FillSheet(); OpenReport(); Mouse.SetCursor(Cursors.Arrow); } } } catch (Exception e) { MessageBox.Show("Error while generating Excel report"); } finally { ReleaseObject(sheet); ReleaseObject(sheets); ReleaseObject(book); ReleaseObject(books); ReleaseObject(excelApp); } } /// Make Microsoft Excel application visible private void OpenReport() { excelApp.Visible = true; } /// Populate the Excel sheet private void FillSheet() { object[] header = CreateHeader(); WriteData(header); } /// Write data into the Excel sheet private void WriteData(object[] header) { object[,] objData = new object[dataToPrint.Count, header.Length]; for (int j = 0; j < dataToPrint.Count; j++) { var item = dataToPrint[j]; for (int i = 0; i < header.Length; i++) { var y = typeof(T).InvokeMember (header[i].ToString(), BindingFlags.GetProperty, null, item, null); objData[j, i] = (y == null) ? "" : y.ToString(); } } AddExcelRows("A2", dataToPrint.Count, header.Length, objData); AutoFitColumns("A1", dataToPrint.Count + 1, header.Length); } /// Method to make columns auto fit according to data private void AutoFitColumns(string startRange, int rowCount, int colCount) { range = sheet.get_Range(startRange, optionalValue); range = range.get_Resize(rowCount, colCount); range.Columns.AutoFit(); } /// Create header from the properties private object[] CreateHeader() { PropertyInfo[] headerInfo = typeof(T).GetProperties(); // Create an array for the headers and add it to the // worksheet starting at cell A1. List<object> objHeaders = new List<object>(); for (int n = 0; n < headerInfo.Length; n++) { objHeaders.Add(headerInfo[n].Name); } var headerToAdd = objHeaders.ToArray(); AddExcelRows("A1", 1, headerToAdd.Length, headerToAdd); SetHeaderStyle(); return headerToAdd; } /// Set Header style as bold private void SetHeaderStyle() { font = range.Font; font.Bold = true; } /// Method to add an excel rows private void AddExcelRows(string startRange, int rowCount, int colCount, object values) { range = sheet.get_Range(startRange, optionalValue); range = range.get_Resize(rowCount, colCount); range.set_Value(optionalValue, values); } /// Create Excel application parameters instances private void CreateExcelRef() { excelApp = new Microsoft.Office.Interop.Excel.Application(); books = (Workbooks)excelApp.Workbooks; book = (Workbook)(books.Add(optionalValue)); sheets = (Sheets)book.Worksheets; sheet = (Worksheet)(sheets.get_Item(1)); } /// Release unused COM objects private void ReleaseObject(object obj) { try { System.Runtime.InteropServices.Marshal.ReleaseComObject(obj); obj = null; } catch (Exception ex) { obj = null; MessageBox.Show(ex.Message.ToString()); } finally { GC.Collect(); } } } 

我不知道从哪里开始这个问题，但任何帮助表示赞赏

Answer 1

如果您必须使用像这样的Excel自动化，那么您需要确保将正确的格式应用于单元格。 所以，你设置的值之后，还要设置格式。 例如，一个date可能是这样的：

 range.set_Value(optionalValue, values); range.NumberFormat = "dd-mmm-yyyy"; 

为了防止使用您提到的格式显示数字：

 range.set_Value(optionalValue, values); range.NumberFormat = "0";