If you know the local path and file name of the file you want the end user to upload (via browser). Then is it possible to pre-set these properties for the HTML file input element (or any upload control)? So when the user clicks 'browse' to select the file to upload, then the dialog has preselected the filename.
Btw, assume that this is for an intranet where the necessary directory/file do exist locally.
Unless it is a custom upload control, this cannot be done for security reasons.
If a html page could set the file to be uploaded using javascript, for instance, an arbitrary html page could upload any file from the client computer (form submission can be triggered via javascript)
This type of interaction with file-upload controls is disabled for security reasons.
Related
I am using Fileupload control to upload file. I am displaying the selected file icon(with achor tag) with file name. if click the icon i want to open the selected file in a new window.
How to take the selected file path from the fileupload control.
Nathiya,
Do you want to open the file BEFORE it is uploaded to the server?
If the file was already uploaded to the server, then you know the file's path since you passed it to the FileUpload1.SaveAs() method.
If you want it before (e.g. someone clicked on the browse button and choose a file but did not upload it to the server) - Then this is not possible as the file is still on the user's local computer (you can't show files that are on the user's computer, only files that are on your server).
What i came to know from the search is it is not possible
As it leads to privacy breach and security breach
Please check this Get Full File path
FileUpload1.FileName will give you the name of a file on a client.
EDIT : As per the comment. You should first upload the file to your server. Then use the path (the url to the file) to set as the href value of an achor tag.
I have build a Silverlight 5 application that allows users to drag and drop an item onto a selected area and upload them to a particular URL. Its an HTML page that references the xap file (that contains the Silverlight code) inside a div through the object tag. The purpose is that when the user drags an element into that div, the element should be uploaded to the server specified.
The problem is that for uploading the dragged item, I need to call FileInfo's getFullName() method and it requires the user to be trusted. Since the Silverlight application will run inside the div of the HTML page, I am assuming that its a case of in-browser access, and according to this article, it would require a change in the end user's IE settings. Asking the user to change his registry keys for uploading files is obviously not an option.
Is there any way out of the situation (that is, if I have understood the situation correctly) ?
You don't need to call FileInfo.getFullName() to be able to upload the file to the server. Instead, you call the FileInfo.OpenRead() method, which returns a stream that reads the file's data.
An example of using drag-and-drop with user-supplied files can be found here.
In an application I'm working on, the users are prompted for the path of a file. This path will always point to a network drive, which the server has access to.
Currently, we use an asp:FileUpload control to accomplish this, drawing the path from the FileUpload's PostedFile.FileName property.
The problem is that the files the user is selecting from are locked down pretty severely. While the server has full access to them, the user only has permission to view the directory contents... They can't even open the files. This has worked fine up until now... But Windows 7 won't display these files in the file picker generated by FileUpload, so we need an alternative.
Notes:
Looking for a way to get UI similar to the file open dialog already in place.
The ability to view the client's local files (including the shared network drives) is a bonus, although listing the files through the server is acceptable.
I think the problem is the permissions on these files. If the users can't even open them, how can their terminal possibly upload them to a website?
I'm surprised this has ever worked.
If the user is simply supplying a path and not actually uploading the file you could have the server display the contents of the folder (in a list or whatever) and the user selects from that.
So how about creating a file browser in a window, such that a user clicks "Pick File" which opens a new window showing the root contents of the network drive. The user can then navigate round the directories to the file they want, finally clicking the file to "upload".
Use System.IO Directory.GetFiles to get the files in a directory.
I think you need to separate out the two things. Here's an example prompt to convey the idea:
Select a (file from your computer) OR (file from the server)
Client Files
You can use the standard file-upload control, that is fine.
Server Files
No user should be selecting files from your sever with the upload-file dialog. (Keep in mind that these dialog boxes allow right-click menus delete, copy, properties, etc and locked down or not, the user should not think they have this ability).
I don't think there are any controls that will "do-it-all" for you in this manner. I think your best bet is to make your own interface here.
VS 2008
How to fetch the Full File path for the File Uploaded in asp.net ??
Either HTML or ASP.Net Server Control, i need to use File Upload - Browse feature and need to fetch the Complete file path.
My guess is Due to security reasons, ASP.Net does not support asp:FileUpload to deliver the Full File Path ..!
What would be the best way to get the file path ?
You can't do what you want by design (at least on modern browsers). This would be a security issue if you could.
You can read more about this here.
Snipit:
Historically, the HTML File Upload
Control () has been
the source of a significant number of
information disclosure
vulnerabilities. To resolve these
issues, two changes were made to the
behavior of the control.
To block attacks that rely on
“stealing” keystrokes to
surreptitiously trick the user into
typing a local file path into the
control, the File Path edit box is now
read-only. The user must explicitly
select a file for upload using the
File Browse dialog.
IE8 read-only File Path box
Additionally, the “Include local
directory path when uploading files”
URLAction has been set to "Disable"
for the Internet Zone. This change
prevents leakage of potentially
sensitive local file-system
information to the Internet. For
instance, rather than submitting the
full path
C:\users\ericlaw\documents\secret\image.png,
Internet Explorer 8 will now submit
only the filename image.png.
I'm working on an ASP.NET web application for our corporate intranet users. I have a form where a user should provide a path to the file on the local network (something like "\localServer\someFolder\someFile.ext") without uploading the actual file. The issue is that users don't want to type the whole file path and want to use some kind of visual browse dialog.
The standard HTML <input type=file> element allows to browse for a file, but most of the browsers (except for IE) don't allow to access file's full path, so I think it should be done by some external component like Silverlight, Flash, Java applet etc.
I tried to do it with Silverlight, but I'm getting a SecurityException when trying to access file's full path using Silverlight's OpenFileDialog class.
This java applet http://jumploader.com/demo_images.html seems to do something similar to what I'm looking for, but it's focused on uploading files - I only need to be able to get file's full path and pass it to the server as a string.
Any suggestions would be appreciated.
Telerik ASP.NET AJAX RadFileExplorer has the functionality you're looking for:
http://www.telerik.com/products/aspnet-ajax/fileexplorer.aspx
You can use their Custom File Content Provider to hook the GUI to your server's file system.
http://demos.telerik.com/aspnet-ajax/fileexplorer/examples/server-sideapi/dbfilebrowsercontentprovider/defaultcs.aspx
This should be possible with Flash's uploading capabilities. SWFUpload has an API that you may be able to access from JavaScript to extract the selected file name without actually uploading anything. See docs here, for example getFile():
getFile is used to retrieve a File Object from the queue. The file retrieved by passing in a file id (the id property from a file object) or a file index (the index property from a file object).