[英]Resize excel file while downloading in asp.net?
我正在使用NOPI庫創建Excel文件下載。 我有很多數據要顯示在Excel文件中,這需要很長時間並且文件很大。
無論如何,我們可以在下載時減小Excel文件的大小嗎? 現在文件大小是32 MB想要這個大小。
當前代碼:
If sqlDs.Tables(0).Rows.Count > 0 Then
Dim dtExcel As DataTable = sqlDs.Tables(0)
For Each column In dtExcel.Columns
row.CreateCell(j).SetCellValue(column.ColumnName)
'sheet1.AutoSizeColumn(j)
sheet1.SetColumnWidth(j, 500)
j = (j + 1)
Next
Dim iRow As Integer = 2
'Double Cell Style
Dim cellDoubleStyle As HSSFCellStyle = hssfworkbook.CreateCellStyle
cellDoubleStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("#,##0.00")
'Integer Cell Style
Dim cellIntStyle As HSSFCellStyle = hssfworkbook.CreateCellStyle
cellIntStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("0")
'Date Cell Style
Dim cellDateStyle As HSSFCellStyle = hssfworkbook.CreateCellStyle
cellDateStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat(Format("m/d/yy"))
For Each dr As DataRow In dtExcel.Rows
j = 0
Dim value As Double
Dim colInt As Integer
row = sheet1.CreateRow(iRow)
For Each col As DataColumn In dtExcel.Columns
If Double.TryParse(dr(col).ToString, value) Then
Dim cell As HSSFCell = row.CreateCell(j)
If dr(col).ToString.Contains(".") Then
cell.SetCellValue(value)
cell.CellStyle = cellDoubleStyle
Else
cell.SetCellValue(value)
cell.CellStyle = cellIntStyle
End If '
ElseIf IsDate(dr(col).ToString) Then
Dim cell As HSSFCell = row.CreateCell(j)
Dim dt As New DateTime
DateTime.TryParse(dr(col).ToString, dt)
cell.SetCellValue(dt)
cell.CellStyle = cellDateStyle
ElseIf Integer.TryParse(dr(col).ToString, colInt) Then
Dim cell As HSSFCell = row.CreateCell(j)
cell.SetCellValue(colInt)
Else
row.CreateCell(j).SetCellValue(dr(col).ToString)
'sheet1.AutoSizeColumn(j)
End If
j = j + 1
Next
iRow = iRow + 1
Next
End If
如果您不使用xslx格式,則可以考慮在發送到響應流之前打包文件。 由於excel文檔的大小與您存儲在其中的數據量有關,因此您可能無法在文檔中減少很多內容。
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