In my app i have the option of viewing a file that opens a window application (google earth).
In order to do that i wish to create a custom file server-side under a certain relative path (eg. "//Files") and then tell the server to execute it.
How can i do this?
Thank you
You would need to expose the relative paths to your clients and then have them link to that location. How you set it up will depend heavily on what type of server we are talking about (Windows or Linux, IIS or Apache, etc).
Related
I am working with a silverlight application, File.WriteAllText is giving File operation not permitted when trying to write to local desktop. Access to path exception.
This code always works on local desktop but, is giving error when code is deployed on server.
Silverlight does not have the access priveleges like u expect. If you want to add a file to your Silverlight Application at runtime, you will need to have Silverlight running Out of the Browser with Elevated priveleges. There are certain limitations to this too. You can only access files in Special Folders like My Documents, Pictures, Music etc. For more info, see this and this
I have a WPF application that is designed for a touchscreen kiosk. Users will not have access to a keyboard or mouse. The application runs fine when started normally from the program icon in windows. However, when it is set up to run automatically at startup (by replacing the Windows shell using a registry key), the application does not function properly.
The application reads an XML file that lists available videos, then displays buttons to show the videos. When run in "kiosk mode," it does not seem to have access to the files in its media directory (the XML file and presumably the videos as well). I suspect that because the application is running in place of the windows explorer, it is missing resources it needs for file access that are normally loaded by windows explorer.
I have not been able to find any info on this - there is plenty of info on how to get an app to run at startup, but not much on how to make sure it will actually function in that environment. The PC is running Windows 7 Professional.
Is my assumption about the problem correct, or is it likely something else (e.g. permissions - we checked the permissions, but maybe they operate differently when you replace the windows shell?) If it is because needed resources are not loaded, does anyone have pointers on how to make sure my app loads them?
Perhaps you have file access occurring via a file dialog? This might explain a bit further. What is the minimum functionality needed to create Shell Replacement for Windows?
because you have stopped windows default running explorer.exe , your program can not get access to default xml directory therefore you should specify the complete path for example like below:
stream = File.Open(#"C:\x86\Debug\xml.xml", FileMode.OpenOrCreate);
I've become familiar with the new concept of "out of browser" web applications, supported in the recent Silverlight, JavaFX, Adobe AIR etc.
Listening recently to a podcast on the subject by Scott Hanselman, I've become aware that one of the purposes behind these new architectures is to allow for "desktop-application-feel". Also, I understand some (or all) of these allow for some offline access to a sandbox of resources. This really sounds as if these frameworks could be an alternative to "real" desktop applications, as long as the application does not require messing with the user's machine (i.e. access to peripherals, certain file IO, etc).
I have a very specific question. My application needs to run at start-up. Is it possible to do so using such a framework without requiring the user to download and run a certain executable?
For example, I could always direct the user to download a small EXE that will put a .lnk file in the start-up directory, but I want to avoid such a patch.
To summarize: is it possible to have an out-of-browser web application setup itself to run at start-up without requiring file download?
To further clarify, this question does not come from an "evil" place, but rather from trying to decide whether "out-of-browser" frameworks are indeed a proper alternative to a desktop application, for my specific requirements.
The BkMark example here shows how to start an application on startup using Adobe Air. So, yes it is possible.
So, here's the deal: web apps in general will have a security context around them, and by default won't have access to write to the filesystem (outside of a temp files), access the registry, etc.
One way is, as you said, have the user run something or configure it so the lnk is executed on startup.
Another way, and I think, more in line of what you want, is that the user can run the program himself, click some button in the application, and it's configured.
I know with Java you could do this, but the user has to allow full access to their system, because your app would need to change System configuration. Then you could just configure it (by writing a lnk to your WebStart JNLP in the Startup folder)
For Internet Exploder, Javascript apps do have write access to the disk.
For other (better-secured) browsers you will either need to have a download, or Adobe AIR.
Assuming you are building for Windows, launching an executable at startup can be done several ways.
For user session startup, you can achieve this either by putting a lnk file in the appropriate folder, or with a registry entry. For operating system startup, you can achieve this with a registry entry. There are several permutations:
run application once on boot (UI not allowed)
run application every boot (UI not allowed)
start service every boot according to policy set in registry
run application once on user session start
run application every user session
Since an out of browser application has UI I expect you mean run application every user session and in this case you may as well put an LNK file in the user's startup folder.
I just created a shortcut for an SL4 OOB application, and this was the Target of the shortcut:
"C:\Program Files (x86)\Microsoft Silverlight\sllauncher.exe" 2635882436.localhost
A search of my disk revealed that location 2635882436.localhost is a folder.
C:\Users\<mylogin>\AppData\LocalLow\Microsoft\Silverlight\OutOfBrowser\2635882436.localhost
I rather doubt an OOB app of any type could place a shortcut in the Startup folder unless you somehow obtained Full Trust.
I have started coding an FTP client application (for fun). I’m trying to represent remotely hosted files with icons. For example, let’s say I’m browsing the root folder of an FTP server (/) and want to display the Backup.zip file with the icon association from that client operating system. On some systems, this may be the windows compression icon and other operating systems this may be WinZip or WinRAR icons.
I have the client browsing local files with the SHGetFileInfo() function. This works great with files that are local, however, this function requires the physical file in order to retrieve the associated icon. So, this will not work with remotely hosted files. I have found some samples of loading icons given a file extension, and this is really where the question comes in... What would be the best strategy to get icons associated to remote files?
Go to the registry every time and look up extension to icon associations
Create 1 byte files with each extension and use the SHGetFileInfo() function for remote files (using local 1 byte files as association for remote files)
Other strategies???
What would a professional software company creating an FTP client do?
Thank you for your time.
-Jessy Houle
I suggest that you don't go to the registry every time: go if you need to, but if you've already been for a given filetype then remember/cache that result (within your program) and reuse it.
Use the procedure here from a previous Stack Overflow question on the same idea and uses the registry instead of an actual file.
How can I get the filetype icon that Windows Explorer shows?
I'm looking to build some functionality for a content management system for the editing of files stored on the server.
I'd like to provide users the ability to easily download files locally to their computer, open the file for editing, and save it back to the server. The process should be as seamless as possible.
Here's the steps today:
Click the link to download the file (say a PSD) in a web browser
Save it to disk
Find the file, open it for editing in Photoshop
Make changes, save the file
Go back to the browser,navigate to the file that was downloaded.
Click "replace file"
Find the file, upload it back to the server.
Here's what I want:
Click the link to open the PSD file
File is downloaded, Photoshop launches
Make changes, save the file
File is uploaded back to server, replacing the original file
Those who have used Sharepoint know that this works (using WebDAV) but only with the Office applications (PPT, DOC, XLS). I'd like it to work with all file types.
This will take some kind of software to be installed locally - perhaps a separatly installed application with a mime type registered, a signed java applet, or a firefox extension.
This seems like a problem that should have been solved. Has anyone seen this done before?
Windows client OS has a WebDAV redirector and has had for a long time, so
a) you shouldnt need a client piece and b) it's not specific to Office files.
The fun bit is the server end, implementing a WebDAV server.
WebDAV isnt supported on client OSs like Vista (IIS5.1 has support, 6.0 doesnt), only on Servers (2K3, 2K8...)
There is goo/examples/frameworks (cant recall which from when I researched it) available for implementing a WebDAV server, but it requires a server OS [so I had to discount it as the host in my case could potentially have been Vista/7, not server/XP).
The site WebDAV Resources includes a link to at least one open-source server implementation. I haven't used this software, I'm just citing the reference.
It appears that Apache has deprecated or dropped support for server-side WebDAV since the Jakarta Slide project has been retired.