将listview数据保存到相同的excel文件但不同的表单

Question

我已经知道如何使用openfiledialog保存在excel中。但我想要发生的是，当我保存另一个文件时，我希望它保存在我现有的文件中，但在另一张表中。你能帮助我吗？

这是我保存的代码

Public Sub saveExcelFile(ByVal FileName As String)
            Dim xls As New Excel.Application
            Dim sheet As Excel.Worksheet
            Dim i As Integer
            xls.Workbooks.Add()
            sheet = xls.ActiveWorkbook.ActiveSheet
            Dim row As Integer = 1
            Dim col As Integer = 1
            For Each item As ListViewItem In ListView1.Items
                    For i = 0 To item.SubItems.Count - 1
                            sheet.Cells(row, col) = item.SubItems(i).Text
                            col = col + 1
                    Next
                    row += 1
                    col = 1
            Next
            xls.ActiveWorkbook.SaveAs(FileName)
            xls.Workbooks.Close()
            xls.Quit()
    End Sub


Private Sub btnsave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnsave.Click
            Dim saveFileDialog1 As New SaveFileDialog
            saveFileDialog1.Filter = "Excel File|*.xlsx"
            saveFileDialog1.Title = "Save an Excel File"
            saveFileDialog1.ShowDialog()
            If saveFileDialog1.FileName <> "" Then
                    saveExcelFile(saveFileDialog1.FileName)
            End If
            MessageBox.Show("Record Saved!")
    End Sub

Answer 1

使用NPOI导出为Excel。您可以使用NPOI指定工作表。有关详细信息，请参阅documentation

您也可以使用Officehelper

修改

使用此示例代码使用NPOI创建Excel工作表。它只是一个示例代码。您需要参考文档以获取更多详细信息。

List<OrderViewModel> orderViewModelList = SelectOrders();

            //Add Column title
            HSSFWorkbook hssfworkbook = new HSSFWorkbook();
            HSSFSheet sheet1 = hssfworkbook.CreateSheet("Sheet1");
            sheet1.CreateRow(0).CreateCell(0).SetCellValue("Order No");

            sheet1.CreateRow(0).CreateCell(5).SetCellValue("Price");


            //check for if device exist for saving
            if (orderViewModelList.Count() > 0)
            {
                //Convert to csv class type
                int i = 0;
                foreach (var item in orderViewModelList)
                {
                    HSSFRow enqRow = sheet1.CreateRow(i + 1);

                    enqRow.CreateCell(0).SetCellValue(item.OrderId);

                    enqRow.CreateCell(5).SetCellValue(( item.OrderAmount));
                    i++;
                }
            }

            MemoryStream file = new MemoryStream();
            hssfworkbook.Write(file);

            byte[] Data = file.GetBuffer();
            Response.Clear();
            Response.AddHeader("content-disposition", "attachment;filename=OrderReport.xls");
            Response.Charset = "";
            Response.ContentType = "application/ms-excel";
            Response.BinaryWrite(Data);
            Response.End();

另见this example

如果要将新工作表附加到现有Excel工作表 refer this example