Save generated excel file with dialog - vb.net

Question

I'm generating an xls file from a datatable on a button click. Right now the path to save the file is hardcoded in the function to generate the file:
Function CreateExcelFile(xlFile As String) As Boolean
Try
Dim xlRow As Integer = 2
Dim xlApp As New Microsoft.Office.Interop.Excel.Application
Dim xlWB = xlApp.Workbooks.Add
Dim xlWS = xlApp.Worksheets.Add
Dim intStr As Integer = 0
Dim NewFile As String = ""
Dim strCaption As String = "PSLF Driver Files Records"
xlFile = Replace(xlFile, "Return Files", "Reports")
xlFile = Replace(xlFile, "txt", "xlsx")
xlFile = Replace(xlFile, "_", " ")
intStr = InStr(xlFile, "Reports")
xlApp.IgnoreRemoteRequests = True
xlWS = xlWB.Worksheets(xlApp.ActiveSheet.Name)
xlApp.DisplayAlerts = False
xlApp.Sheets.Add()
Dim xlTopRow As Integer = 2 'First Row to enter data
xlApp.Sheets.Add()
xlApp.Sheets(1).Name = strCaption
xlApp.Sheets(1).Select()
'Store datatable in 2-dimensional array
Dim arrExcel(frm_Records.BindingSource1.DataSource.Rows.Count, frm_Records.BindingSource1.DataSource.Columns.Count - 1) As String
'Write header row to array
arrExcel(0, 0) = "SSN"
arrExcel(0, 1) = "CREATE_DATE"
arrExcel(0, 2) = "SERVICER_CODE"
arrExcel(0, 3) = "STATUS"
arrExcel(0, 4) = "DRIVER_FILE_OUT"
arrExcel(0, 5) = "LAST_UPDATE_USER"
arrExcel(0, 6) = "LAST_UPDATE_DATE"
arrExcel(0, 7) = "CREATE_USER"
'Copy rows from datatable to array
xlRow = 1
For Each dr As DataRow In frm_Records.BindingSource1.DataSource.Rows
arrExcel(xlRow, 0) = dr("SSN")
arrExcel(xlRow, 1) = dr("CREATE_DATE")
arrExcel(xlRow, 2) = dr("SERVICER_CODE")
arrExcel(xlRow, 3) = dr("STATUS")
If IsDBNull(dr("DRIVER_FILE_OUT")) Then
arrExcel(xlRow, 4) = ""
Else
arrExcel(xlRow, 4) = dr("DRIVER_FILE_OUT")
End If
arrExcel(xlRow, 5) = dr("LAST_UPDATE_USER")
arrExcel(xlRow, 6) = dr("LAST_UPDATE_DATE")
arrExcel(xlRow, 7) = dr("CREATE_USER")
xlRow += 1
Next
'Set up range
Dim c1 As Microsoft.Office.Interop.Excel.Range = xlApp.Range("A1") 'Top left of data
Dim c2 As Microsoft.Office.Interop.Excel.Range = xlApp.Range("T" & frm_Records.BindingSource1.DataSource.Rows.Count - 1 + xlTopRow) 'Bottom right of data
Dim xlRange As Microsoft.Office.Interop.Excel.Range = xlApp.Range(c1, c2)
xlRange.Value = arrExcel 'Write array to range in Excel
xlWB.ActiveSheet.Range("A:T").Columns.Autofit()
xlWB.ActiveSheet.Range("A1:T1").Interior.Color = RGB(255, 255, 153)
xlWB.ActiveSheet.Range("A1:T1").Font.Bold = True
With xlApp.ActiveWindow
.SplitColumn = 0
.SplitRow = 1
End With
xlApp.ActiveWindow.FreezePanes = True
Dim strSheet As String
For Each Sht In xlWB.Worksheets
If Sht.name Like "*Sheet*" Then
strSheet = Sht.name
xlApp.Sheets(strSheet).delete()
End If
Next
xlApp.IgnoreRemoteRequests = False
xlWB.SaveAs(xlFile)
xlWB.Close()
Dim xlHWND As Integer = xlApp.Hwnd
'this will have the process ID after call to GetWindowThreadProcessId
Dim ProcIdXL As Integer = 0
'get the process ID
GetWindowThreadProcessId(xlHWND, ProcIdXL)
'get the process
Dim xproc As Process = Process.GetProcessById(ProcIdXL)
xlApp.Quit()
'Release
System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp)
'set to nothing
xlApp = Nothing
'kill it with glee
If Not xproc.HasExited Then
xproc.Kill()
End If
Catch ex As Exception
WP.WAPC_RUNSCRIPT_ERROR_FILE(WP.argScriptName, "Error Writing to Excel Report: " & ex.Message)
Return False
End Try
Return True
End Function
<DllImport("user32.dll", SetLastError:=True)> _
Private Function GetWindowThreadProcessId(ByVal hwnd As IntPtr, _
ByRef lpdwProcessId As Integer) As Integer
End Function
#End Region
What I want to do is upon completion of the creation of the Excel file, I want to give the user the option of where to save the newly created file. I'm new at
Winforms and am not sure how to do this.
What is the best way to enable the user to choose where to saved the file?
Update:
Working code after #Claudius' answer.
Private Sub btnRecExport_Click(sender As Object, e As EventArgs) Handles
btnRecExport.Click
Dim file As String = "I:\PSLFRecords.xlsx"
CreateExcelFile(file)
Dim sfdRecords As New SaveFileDialog()
sfdRecords.Filter = "Excel File|*.xls"
sfdRecords.Title = "Save PSLF Driver Records"
sfdRecords.ShowDialog()
If sfdRecords.FileName <> "" Then
xlWB.SaveAs(sfdRecords.FileName)
fs.Close()
End If
End Sub

Answer 1

From MSDN edited to your needs:
Private Sub Button2_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button2.Click
' Displays a SaveFileDialog so the user can save the Image
' assigned to Button2.
Dim saveFileDialog1 As New SaveFileDialog()
saveFileDialog1.Filter = "Excel File|*.xls
saveFileDialog1.Title = "Save an Excel File"
saveFileDialog1.ShowDialog()
' If the file name is not an empty string open it for saving.
If saveFileDialog1.FileName <> "" Then
xlWB.SaveAs(saveFileDialog1.FileName)
fs.Close()
End If
End Sub

Answer 2

All you'd actually need is just a new instance of the FolderBrowserDialog Class, that will return to you the path the user selected. All the information you need is already present in the documentation.