using vb.net export a datatable to Excel and save as file

Export a datatable to Excel and save as file

Dim CurrentCI As System.Globalization.CultureInfo = System.Threading.Thread.CurrentThread.CurrentCulture
System.Threading.Thread.CurrentThread.CurrentCulture = New System.Globalization.CultureInfo("en-US")

If (tmpDataTable Is Nothing) Then
Return
End If

Dim rowNum As Integer = tmpDataTable.Rows.Count
Dim columnNum As Integer = tmpDataTable.Columns.Count
Dim rowIndex As Integer = 1
Dim columnIndex As Integer = 0

Dim xlApp As Excel.Application = New ApplicationClass()
xlApp.DefaultFilePath = ""
xlApp.DisplayAlerts = True
xlApp.SheetsInNewWorkbook = 1
Dim xlBook As Workbook = xlApp.Workbooks.Add(True)

'将DataTable的列名导入Excel表第一行
Dim dc As DataColumn
For Each dc In tmpDataTable.Columns
columnIndex = columnIndex + 1
xlApp.Cells(rowIndex, columnIndex) = dc.ColumnName
Next

'将DataTable中的数据导入Excel中
Dim i As Integer = 0
For i = 0 To rowNum - 1

rowIndex = rowIndex + 1
columnIndex = 0
Dim j As Integer = 0
For j = 0 To columnNum - 1
columnIndex = columnIndex + 1
xlApp.Cells(rowIndex, columnIndex) = Convert.ToString(tmpDataTable.Rows(i)(j))
Next
Next

'xlBook.SaveCopyAs(HttpUtility.UrlDecode(strFileName, System.Text.Encoding.UTF8));
xlBook.SaveCopyAs(strFileName)
End