Checking if a user uploaded a file

[NightStalker-DNS]

Hey guys

Im fairly new to asp.net 2.0, but i know asp.net 1.1 pretty well. This is my question:

I have an <asp:FileUpload> control for a user to upload a file.

But now b4 i run the upload code, i wana check if the user did select a file or not:

if (file.PostedFile.FileName != "")
{
//upload code
}

Thats wat id do in 1.1, but in 2.0 it gives me the object ref not set to an instance of an object error.

I aslo tried this:

if (file.PostedFile != null)
{

}

then it doesnt give me errors, but never runs the code. Any ideas?

Thanks

[NightStalker-DNS]

I dnt no wat is going on with this thing.

It also gives me "Object Reference not set to and instance of an object" wen I do this:

string filesName = file.PostedFile.FileName;


And is does the same thing whether I use the asp server side control or the <input type="file"> html control.

Anything I can check to sort this problem out?

Thanks

[wwb_99]

Is the form enctype set correctly?

[dhtmlgod]

Or there is the .HasFile property, which might help a little

http://msdn2.microsoft.com/en-us/lib...d.hasfile.aspx

[NightStalker-DNS]

Hey. Thanks for the replies.

@ wwb. I have not set the form encryption as i dnt think its important using the asp:FileUpload control and I never used it b4 and it still worked fine.

@dhtml god. I used this: bool fileName = file.HasFile;

then i put a break point in and step thru the code. Its still coming back as false no matter if I upload a file or not.

Any ideas why its doing that?

[NightStalker-DNS]

Has it maybe got something to do with the fact that the <form> tag is in the master page and the FileUpload controls or on a content page?

[wwb_99]

Not encryption, encoding type. Needs to be multipart/form-data.

[NightStalker-DNS]

Hey wwb.

Where do I set the encoding?

[wwb_99]

In the form tag on your MasterPage.

[NightStalker-DNS]

This is how the form looks on the master page:

<form runat="server" id="Form1" name="Form1" enctype="multipart/form-data">

Is there anything wrong with it?

Thanks for all the help guys

[NightStalker-DNS]

Hey guys.

I found the problem! Its coz it was in an atlas update panel. As soon as I took it out the update panel, it worked fine.

Is there a was to get around this? Coz I need to put it in an update panel.

Any ideas?

Thanks

[dhtmlgod]

Oh dear... I'm wanting to have a file upload in an update panel... I'll have a little look at it and tell you how I get on. Have you got the latest releases? All the links and a lovely post by our endearing .NET blogger can be found here: http://www.sitepoint.com/blogs/2006/...ta-1-released/

Off Topic:

There you go Wyatt, no need for some self promotion :P

[dhtmlgod]

It appears that it isn't possible to do a file upload with "Atlas" and the UpdatePanel...

[NightStalker-DNS]

. Stupid Atlas. hehehe

[dhtmlgod]

This might be of use: https://secure.codeproject.com/aspnet/FlashUpload.asp

[wwb_99]

IIRC, there is a file upload widget in the atlas control toolkit. That might work for you.

[dhtmlgod]

As far as I can see, there isn't one http://ajax.asp.net/default.aspx?tabid=47&subtabid=477 unless I'm overlooking something...

[wwb_99]

Yeah, I guess I did not quite recall correctly.

[dhtmlgod]

Damn Guess I'll have a little peck at the Extender projects and see if I can write one...

[NightStalker-DNS]

That is a pitty about this upload thing. dhtmlgod. If u manage to write one.... plz send it to me. .

ill also look into that flash uploaded.

Thanks for all the help guys.