problem with checking FileUpload

[Bart]

Hi,

i use the FileUpload control but if the uploaded file already exists, i want
let the choice between overwriting or not the existing file.
Therefore i use a radiobuttonlist with 'yes' and 'no'.

I get no error, but if i take 'yes', the new file which overwrites the
existing one is empty. I think it's because of the postabck caused by the
radiobuttonlist , so the Fileupload control looses the chosen file. I put the
FileUpLoad1.Fil eName in a hiddenfield in order to get it back after the 2nd
postback, but no succes.

Thanks for help
Bart

Here my code:
aspx:
<asp:FileUpLo ad id="FileUpLoad1 " runat="server" /><br /><br />
<asp:Button id="Button1" Text="Opladen" runat="server" /><br /><br
/>
<asp:Label id="Label1" runat="server" />
<asp:HiddenFiel d ID="HiddenField 1" runat="server" />
<asp:RadioButto nList ID="RadioButton List1" runat="server"
Visible=false AutoPostBack=tr ue>
<asp:ListItem Value="ja" Text="ja" ></asp:ListItem>
<asp:ListItem Value="nee" Text="nee" ></asp:ListItem>
</asp:RadioButton List>

code-behind:

Protected Sub Button1_Click1( ByVal sender As Object, ByVal e As
System.EventArg s) Handles Button1.Click
If FileUpLoad1.Has File Then
If File.Exists(Ser ver.MapPath("~/uploaddir/" &
FileUpLoad1.Fil eName)) Then
HiddenField1.Va lue = FileUpLoad1.Fil eName
Label1.Text = FileUpLoad1.Fil eName & " is already on server.
Overwrite?"
RadioButtonList 1.Visible = True
Else
Label1.Visible = False
FileUpLoad1.Sav eAs(Server.MapP ath("~/uploaddir/" &
FileUpLoad1.Fil eName))
End If
End If
End Sub

Protected Sub RadioButtonList 1_SelectedIndex Changed(ByVal sender As
Object, ByVal e As System.EventArg s) Handles
RadioButtonList 1.SelectedIndex Changed
If RadioButtonList 1.SelectedValue = "yes" Then
Label1.Visible = False
FileUpLoad1.Sav eAs(Server.MapP ath("~/uploaddir/" &
HiddenField1.Va lue))
Else
RadioButtonList 1.Visible = False
Label1.Visible = False
End If
End Sub
End Class

[John Timney \(MVP\)]

Re: problem with checking FileUpload

You should save the file on the server first as a tempoirary file, and then
present the information that the file already exists. If yes, replace the
existing file - if no delete the temp one.

Regards

John Timney (MVP)

http://www.johntimney.com

http://www.johntimney.com/blog

"Bart" <b@swrote in message
news:%23A5jOsUo HHA.1000@TK2MSF TNGP05.phx.gbl. ..

Hi,
>
i use the FileUpload control but if the uploaded file already exists, i
want let the choice between overwriting or not the existing file.
Therefore i use a radiobuttonlist with 'yes' and 'no'.
>
I get no error, but if i take 'yes', the new file which overwrites the
existing one is empty. I think it's because of the postabck caused by the
radiobuttonlist , so the Fileupload control looses the chosen file. I put
the FileUpLoad1.Fil eName in a hiddenfield in order to get it back after
the 2nd postback, but no succes.
>
Thanks for help
Bart
>
Here my code:
aspx:
<asp:FileUpLo ad id="FileUpLoad1 " runat="server" /><br /><br />
<asp:Button id="Button1" Text="Opladen" runat="server" /><br /><br
/>
<asp:Label id="Label1" runat="server" />
<asp:HiddenFiel d ID="HiddenField 1" runat="server" />
<asp:RadioButto nList ID="RadioButton List1" runat="server"
Visible=false AutoPostBack=tr ue>
<asp:ListItem Value="ja" Text="ja" ></asp:ListItem>
<asp:ListItem Value="nee" Text="nee" ></asp:ListItem>
</asp:RadioButton List>
>
code-behind:
>
Protected Sub Button1_Click1( ByVal sender As Object, ByVal e As
System.EventArg s) Handles Button1.Click
If FileUpLoad1.Has File Then
If File.Exists(Ser ver.MapPath("~/uploaddir/" &
FileUpLoad1.Fil eName)) Then
HiddenField1.Va lue = FileUpLoad1.Fil eName
Label1.Text = FileUpLoad1.Fil eName & " is already on
server. Overwrite?"
RadioButtonList 1.Visible = True
Else
Label1.Visible = False
FileUpLoad1.Sav eAs(Server.MapP ath("~/uploaddir/" &
FileUpLoad1.Fil eName))
End If
End If
End Sub
>
Protected Sub RadioButtonList 1_SelectedIndex Changed(ByVal sender As
Object, ByVal e As System.EventArg s) Handles
RadioButtonList 1.SelectedIndex Changed
If RadioButtonList 1.SelectedValue = "yes" Then
Label1.Visible = False
FileUpLoad1.Sav eAs(Server.MapP ath("~/uploaddir/" &
HiddenField1.Va lue))
Else
RadioButtonList 1.Visible = False
Label1.Visible = False
End If
End Sub
End Class
>
>
>

[Bart]

Re: problem with checking FileUpload

Thanks


"John Timney (MVP)" <x_john@timney. eclipse.co.uksc hreef in bericht
news:MpmdnaKJ2b tu1sbbnZ2dnUVZ8 vWdnZ2d@eclipse .net.uk...

You should save the file on the server first as a tempoirary file, and
then present the information that the file already exists. If yes, replace
the existing file - if no delete the temp one.
>
Regards
>
John Timney (MVP)

http://www.johntimney.com

http://www.johntimney.com/blog

>
>
"Bart" <b@swrote in message
news:%23A5jOsUo HHA.1000@TK2MSF TNGP05.phx.gbl. ..

>Hi,
>>
>i use the FileUpload control but if the uploaded file already exists, i
>want let the choice between overwriting or not the existing file.
>Therefore i use a radiobuttonlist with 'yes' and 'no'.
>>
>I get no error, but if i take 'yes', the new file which overwrites the
>existing one is empty. I think it's because of the postabck caused by the
>radiobuttonlis t, so the Fileupload control looses the chosen file. I put
>the FileUpLoad1.Fil eName in a hiddenfield in order to get it back after
>the 2nd postback, but no succes.
>>
>Thanks for help
>Bart
>>
>Here my code:
>aspx:
><asp:FileUpLoa d id="FileUpLoad1 " runat="server" /><br /><br />
> <asp:Button id="Button1" Text="Opladen" runat="server" /><br /><br
>/>
> <asp:Label id="Label1" runat="server" />
> <asp:HiddenFiel d ID="HiddenField 1" runat="server" />
> <asp:RadioButto nList ID="RadioButton List1" runat="server"
>Visible=fals e AutoPostBack=tr ue>
> <asp:ListItem Value="ja" Text="ja" ></asp:ListItem>
> <asp:ListItem Value="nee" Text="nee" ></asp:ListItem>
> </asp:RadioButton List>
>>
>code-behind:
>>
>Protected Sub Button1_Click1( ByVal sender As Object, ByVal e As
>System.EventAr gs) Handles Button1.Click
> If FileUpLoad1.Has File Then
> If File.Exists(Ser ver.MapPath("~/uploaddir/" &
>FileUpLoad1.Fi leName)) Then
> HiddenField1.Va lue = FileUpLoad1.Fil eName
> Label1.Text = FileUpLoad1.Fil eName & " is already on
>server. Overwrite?"
> RadioButtonList 1.Visible = True
> Else
> Label1.Visible = False
> FileUpLoad1.Sav eAs(Server.MapP ath("~/uploaddir/" &
>FileUpLoad1.Fi leName))
> End If
> End If
> End Sub
>>
> Protected Sub RadioButtonList 1_SelectedIndex Changed(ByVal sender As
>Object, ByVal e As System.EventArg s) Handles
>RadioButtonLis t1.SelectedInde xChanged
> If RadioButtonList 1.SelectedValue = "yes" Then
> Label1.Visible = False
> FileUpLoad1.Sav eAs(Server.MapP ath("~/uploaddir/" &
>HiddenField1.V alue))
> Else
> RadioButtonList 1.Visible = False
> Label1.Visible = False
> End If
> End Sub
>End Class
>>
>>
>>

>
>