Question

我将要编写一个WPF应用程序，该应用程序将从数据库中获取数据并将其显示在DataGrid中。然后用一个按钮创建一个Excel文件并用数据填充。对于20000行这样的大量数据，Excel中的填充时间太长。有人知道为什么吗？谢谢

private void copyAlltoClipboard()
    {
        Clipboard.Clear();
        DataGrid1.SelectAllCells();
        DataGrid1.ClipboardCopyMode = DataGridClipboardCopyMode.IncludeHeader;
        ApplicationCommands.Copy.Execute(null, DataGrid1);

    }


    private void Button_Click(object sender, RoutedEventArgs e)
    {
        copyAlltoClipboard();
        Excel.Application xlexcel;
        Excel.Workbook xlWorkBook;
        Excel.Worksheet xlWorkSheet;
        object misValue = System.Reflection.Missing.Value;
        xlexcel = new Excel.Application();
        xlexcel.Visible = true;
        xlWorkBook = xlexcel.Workbooks.Add(misValue);
        xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
        Excel.Range CR = (Excel.Range)xlWorkSheet.Cells[1, 1];
        CR.Select();
        xlWorkSheet.PasteSpecial(CR, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, true);
    }

Answer 1

这是我目前正在使用的方法。
但这与您的代码非常相似。但是我正在使用数据对象将内容复制到剪贴板。这对我来说真的很好。但是无论如何，许多行（例如20000）都会影响性能。

    private void btnExportToExcel_Click(object sender, EventArgs e)
    {
       copyDataGridToClipboard();
       Microsoft.Office.Interop.Excel.Application xlexcel;
       Microsoft.Office.Interop.Excel.Workbook xlWorkBook;
       Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet;
       object misValue = System.Reflection.Missing.Value;
       xlexcel = new Microsoft.Office.Interop.Excel.Application();
       xlexcel.Visible = true;
       xlWorkBook = xlexcel.Workbooks.Add(misValue);
       xlWorkSheet = (Microsoft.Office.Interop.Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
       Microsoft.Office.Interop.Excel.Range CR = (Microsoft.Office.Interop.Excel.Range)xlWorkSheet.Cells[1, 1];
       CR.Select();
       xlWorkSheet.PasteSpecial(CR, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, true); 
   }
   private void copyDataGridToClipboard()
   {
      YourDataGridView.MultiSelect = true;
      yourDataGridView.SelectAll();
      DataObject dataObj = yourDataGridView.GetClipboardContent();
      if (dataObj != null)
      {
          Clipboard.SetDataObject(dataObj);
      }
      yourDataGridView.MultiSelect = true;
   }

使用Interop从DataGrid导出到Excel太慢

1 个答案: