Get full path of a file with FileUpload Control

asp.netfile upload

I am working on a web application which uses the FileUpload control. I have an xls file in the full filepath 'C:\Mailid.xls' that I am attempting to upload.

When I use the command

FileUpload1.PostedFile.FileName

I cannot get the full filepath from my system. However, when I use the above command in another system it works fine.

I also tried the following commands with no success:

   System.IO.Path.GetFullPath(FileUpload1.PostedFile.FileName);
   Path.GetFileName(FileUpload1.PostedFile.FileName);
   System.IO.Path.GetDirectoryName(FileUpload1.PostedFile.FileName).ToString();
   Convert.ToString(System.IO.Directory.GetParent(FileUpload1.PostedFile.FileName));

How can I get full path?

Best Answer

It's currently true that "when you upload a file the browser will only send the source filename and not the full path" - it makes perfect sense that the server has no business knowing whether the file was in "C:\WINDOWS\" or "F:\SOMEDIR\OTHERDIR\PERSONALINFO\". The filename is always sent, and is useful both to help the user 'recognise' the content and possibly to interrogate the file extension to help determine the file type.

However I know from experience that Internet Explorer definitely used to (in older versions) send the entire path. It's difficult to find an authoritative confirmation (except this apache fileupload control doco)

Internet Explorer provides the entire path to the uploaded file and not just the base file name

Regardless, you should not use nor expect the full path to be sent by any 'modern' browser.

Related Solutions

R – How to get FullName with path info in FireFox using asp.net upload control

You can't. This is a deliberate security measure.

In fact you can't really rely on any given browser giving you anything reasonable as a file name, so it's a good idea to prompt the user for a name to use in a separate input control. You can use some JavaScript to make it default to the filename where available, by reading the file upload field's value onchange, and copying the last segment post '/' or '\' if there is one to the name field.

example added re comment:

<input type="text" name="filename" id="filename" />
<input type="file" name="upload" id="upload" />
<script type="text/javascript">
    document.getElementById('upload').onchange= function() {
        var leafname= this.value.split('/').pop().split('\\').pop();
        if (leafname!='')
            document.getElementById('filename').value= leafname;
    };
</script>

Remain path of FileUpload control after postback

The FileUpload will only keep it's value if you take it out of the UpdatePanel. That way you can still do everything with the DropDownList and its AutoPostBack but the ajax-postback won't refresh the FileUpload causing it to become empty. This way you don't need the postbacktriggers any more.

Put the UpdatePanel only around the DropDownList and any controls the postback has to change. If these controls are not next to each other you can use multiple UpdatePanels, the AutoPostBack will refresh all of them (default behavior, you can even change that).

Best Answer

Related Solutions

R – How to get FullName with path info in FireFox using asp.net upload control

Remain path of FileUpload control after postback

Related Topic