0

我的 datagridview 在 datePurchased 列中没有时间。但是当我将它导出为 PDF 时，它已经包含了时间。我只需要日期而不是时间。下面是示例代码

 //For exporting to pdf

      Private Sub ExportButton_Click(sender As Object, e As  EventArgs) Handles ExportButton.Click
  connection.Close()
  connection.Open()

  Dim pdfTable As New PdfPTable(ReportDataGridView.ColumnCount)
  pdfTable.DefaultCell.Padding = 1
  pdfTable.WidthPercentage = 100
  pdfTable.DefaultCell.HorizontalAlignment = Element. ALIGN_CENTER

  Dim ptable As New  Font(iTextSharp.text.Font.FontFamily.HELVETICA, 11, iTextSharp.text.Font.BOLD, BaseColor.BLACK)

    For Each column As DataGridViewColumn in ReportDataGridView.Columns
  Dim cell as new PdfPCell(New Phrase(New Chunk(column.HeaderText, ptable)))
  cell.HorizontalAlignment = Element.ALIGN_CENTER
  cell.FixedHeight = 30
  pdfTable.AddCell(cell)

  Next

    For Each row as DataGridViewRow In ReportDataGridView.Rows
  For each cell as DataGridViewCell In row.Cells
  pdfTable.AddCell(cell.Value.ToString)
  Next
  Next

 Dim folderpath As String = "C:\PDFs\"
 If Not Directory.Exists(folderpath) Then
      Directory.CreateDirectory(folderpath)
 End If

  Using sfd as New 
SaveFileDialog()
 sfd.ShowDialog()
 sfd.OverWritePrompt = True
 sfd.Title =" Save As"
 sfd.AddExtension = True
 sfd.DefaultExt = ".pdf"

  Using stream As New FileStream(sfd.FileName & ".pdf", 
   FileMode.Create)
  Dim pdfdoc As New 
  Document (PageSize.LETTER, 36.0F, 36.0F,36.0F,36.0F)
  PdfWriter.GetInstance(pdfdoc.stream)
  pdfdoc.Open()
  pdfdoc.Add(pdfTable)
  pdfdoc.Close()
  stream.Close()
  If File.Exists("path") Then
       File.AppendAllText("path", "contents")
   End If
  pdfdoc.Close()
  stream.Close()
  End Using

  End Using
  End Sub

如果你问我 DatePurchased 的数据类型是什么，那就是 date。我使用日期而不是日期时间。请帮忙！

4

1 回答 1

0

您必须检测日期并在没有时间的情况下明确格式化，例如

For each cell as DataGridViewCell In row.Cells
    Dim cellValue = cell.Value

    pdfTable.AddCell(If(TypeOf cellValue Is Date,
                        CDate(cellValue).ToShortDateString(),
                        cellValue.ToString()))
Next
于 2020-05-28T04:36:00.397 回答