ASP.NET 2.0 FileUpload - Is it possible to set wildcards?

[ronc85]

I'm using ASP.NET 2.0 and C#. With the FileUpload control is it
possible to set Wildcards (e.g., *.xls and *.doc) so that when the
user clicks the Browse button it defaults to Excel and/or Word files?

Thanks,
Sal

[Masudur]

On Apr 6, 11:27 am, [e-mail] m wrote:

I'm using ASP.NET 2.0 and C#. With the FileUpload control is it
possible to set Wildcards (e.g., *.xls and *.doc) so that when the
user clicks the Browse button it defaults to Excel and/or Word files?

Thanks,
Sal

<asp:FileUplo ad ID="FileUpload1 " runat="server" /><br />
<br />
<asp:Button ID="Button1" runat="server" OnClick="Button 1_Click"
Text="Upload File" />&nbsp;<br />
<br />
<asp:Label ID="Label1" runat="server"> </asp:Label>
<asp:RegularExp ressionValidato r
id="RegularExpr essionValidator 1" runat="server"
ErrorMessage="O nly mp3, m3u or mpeg files are allowed!"
ValidationExpre ssion="^(([a-zA-Z]:)|(\\{2}\w+)\$ ?)(\\(\w[\w].*))
+(.mp3|.MP3|.mp eg|.MPEG|.m3u|. M3U)$"
ControlToValida te="FileUpload1 "></asp:RegularExpr essionValidator >
<br />
<asp:RequiredFi eldValidator
id="RequiredFie ldValidator1" runat="server"
ErrorMessage="T his is a required field!"
ControlToValida te="FileUpload1 "></asp:RequiredFie ldValidator>

[Ben Rush]

Hi Sal,

I'm actually unaware of a way to do this. The only property of the file
upload control that makes sense would be the Accept property of the HTML
element itself
(http://www.htmlhelp.org/reference/ht...#contenttypes).
Unfortunately I can't seem to get IE to really pay attention to it, and
neither does FF from what I can see.

Perhaps someone else knows....

--
~~~~~~~~~~~
Ben Rush
http://www.ben-rush.net/blog
<ro****@gmail.c omwrote in message
news:11******** **************@ n59g2000hsh.goo glegroups.com.. .

I'm using ASP.NET 2.0 and C#. With the FileUpload control is it
possible to set Wildcards (e.g., *.xls and *.doc) so that when the
user clicks the Browse button it defaults to Excel and/or Word files?

Thanks,
Sal

[David Longnecker]

Sal-

Here's a post that discusses your concern:

http://groups.google.com/group/micro...46302931d090b2

It appears that, since the Browse window is controled by the host OS, that
it's not something you can manipulate (as you could on a WinForms application).

For a workaround, I'd agree with Ben that the content type is probably the
easiest to check since it's a bit more reliable than checking file extensions.
You can do this by accessing the object's ContentType property.

Pseudo-code:

if (FileUpload1.Po stedFile.Conten tType != "image/jpeg")
{
// logic here
}

If you have a list of valid content types, you can build a list and iterate
through it. For example:

1. Create a generic list of your valid content types.

private static List<StringVali dContentTypes()
{
List<Stringvali dContentTypes = new List<String>();
validContentTyp es.Clear();
validContentTyp es.Add("image/gif");
validContentTyp es.Add("image/jpeg");
validContentTyp es.Add("image/pjpeg");
validContentTyp es.Add("image/png");
return validContentTyp es;
}

2. And then for your .PostedFile.Con tentType:

List<String_con tentTypes = ValidContentTyp es();

if (_contentTypes. Exists(delegate (string t) { return FileUpload1.Pos tedFile.Content Type
== t; }))
{

// Logic here

}

HTH.

-dl

---
David R. Longnecker
Web Developer
http://blog.tiredstudent.com

Hi Sal,

I'm actually unaware of a way to do this. The only property of the
file upload control that makes sense would be the Accept property of
the HTML element itself
(http://www.htmlhelp.org/reference/ht...#contenttypes).
Unfortunately I can't seem to get IE to really pay attention to it,
and neither does FF from what I can see.

Perhaps someone else knows....

<ro****@gmail.c omwrote in message
news:11******** **************@ n59g2000hsh.goo glegroups.com.. .

>I'm using ASP.NET 2.0 and C#. With the FileUpload control is it
possible to set Wildcards (e.g., *.xls and *.doc) so that when the
user clicks the Browse button it defaults to Excel and/or Word files?

Thanks,
Sal

[SalP]

Thanks for the responses. I didn't think it was possible.

Sal