I'm making an App where I need to create CSV files with data I need to load in a software in a Windows machine. I want to connect an Android Device via USB to a computer and get the file from there. Is there any way I can create a file that's visible for a computer?
From what I've found you can only create cache files and files only visible to the app (neither my PC or the File Manager on the phone can see them).
I thought about creating a service in the network and send the data to that and create the file in the server but that would add more failing points and of course is more work, besides sometimes the app could be running in parts where the Wifi doesn't get to it and would mean I would have to do a temporal file and somehow upload it when it connects back, so not practical at all.
Of course you can create files and folders on external storage of the android device, which is publicly accessible. Refer to this guide.
Note: You need to get permission WRITE_EXTERNAL_STORAGE to write and READ_EXTERNAL_STORAGE to read from device's external storage.
I need to integrate with some older software that will transfer files to our server via FTP. There is no other way to receive these files other than FTP.
As files are uploaded I would like to perform some logic.
I have no way of knowing in advance when new files will be uploaded (they are not uploaded at regular intervals).
I've created a simple Windows Service that uses the FileSystemWatcher class to monitor the root directory of an FTP site and send me an email when new files are created (email is just for demo purposes, production version will probably POST the file to our web api or something). While this works, it has a lot of "moving parks" and requires that the service be installed and running, and it doesn't seem like FileSystemWatcher is all that reliable.
Is there a way to have an ASP.Net site accept FTP uploads?
Does anyone have a better idea for handing incoming files over FTP?
The software sending the files over FTP does not need to read anything on our server, it exclusively writes files.
1) I am developing a desktop application that connects to a access database to store some information. This access database is on a server. I can get to that server using FTP sequence. The server also has the capability to establish connection to access database. Right now, my application downloads the database file into a folder on the computer edits it and puts it back on the server. I would really love to know if its possible to connect to the access database, make changes to it all without downloading it so that I can save time.
2) If its not possible to do what I was asking for in question 1. Say, I share my application with my colleges and I want them to be able to do the same with the database editing. after I make an .exe file out of my project and send it to them. Do they need to install ACE.oledb.12 on every computer that I want to run it on?
As Access is a file based system rather than a dedicated database server, "remote connections" don't exactly exist as all data processing has to be done locally. However as long as you are able to setup either a VPN to the server where the Access file is stored, or even better map the path as a network drive then you should be able to access it without having to download the file first. If you only have FTP access though then it wouldn't be possible.
If all you are using is Jet/ACE, the database that Access normally uses, the other users will at least have to have the drivers, which are free, or if you are working within Access itself, you will need the runtime, also free.
Actually, your terminology you using is wrong. You don't connect to a word file. You don't connect to a power point file.
So you have to keep in mind here you are not really connecting to some text file or mdb file that just happens to be sitting on a hard drive.
You are thus simply opening a file.
I mean it is silly to say we connect to a word file, or we connect to a Power point file. So in the case of the office suite and those basic simple files that resides on the disk drive?
We are talking about plane Jane windows file.
A horse is a horse is a horse.
A file is a file is a file.
So you don't connect to the jpg file sitting on the hard drive, you OPEN the jpg file. So if you talking about your current setup it best to use the correct terminology here. You are not connecting to that Access accDB file, but are in fact opening a PLANE JANE windows file. If you look close at your connection string, it will ALWAYS have a fully qualified windows path name in it that resolves to a file sitting on a folder.
So if you place that file on some server, say web server, then then you still faced with having to open that windows file. This is NOT ANY different than wanting to open a power point file. That means if you going to connect over the internet then you need to EXTEND the windows file system (this means you will need some kind of VPN). At the end of the day, if you cannot use windows networking to browse and open the folder where that file resides, then you cannot open that file with Access (or more specific in your case the JET data engine).
So for example, if the server where the file resides is a non windows box, say Linux, then you need to "add or use" or "install" the windows file and networking system on that box. A common choice in Linux is to install and run Samba on that computer.
Keep in mind that in the case of using SQL server, then you are connecting to a SERVICE running ON THAT server. In this case then you not opening a file on the remote box, but are simply are using a socket (TCP/IP) connection to some service. So you not just opening a silly old windows file that happens to be an accdb file on that system in this case.
So as such when you use FTP or http, these are not real "windows" networking systems that allow you to open + use a plane Jane windows file.
FTP will require the WHOLE FILE to be downloaded local.
PROBLEM!
If the web site or web server has the accDB file open, then how are you going to have the web server CLOSE the file BEFORE you upload and OVERWRITE the file? In other words, if that file is open by the web server, then you should NOT be making a copy and even downloading a copy via FTP until the SERVER AND WEB SITE CLOSES THE FILE! This means you NEED permission to STOP the web server while you do this!
So as such, just keep in mind the concept here that you are NOT connecting to some file, but you are just going to OPEN the file. You need to be able to OPEN the file, and you need to be using the windows networking system to do this open file in the case of Access. I mean, you don't have to install Access(JET) on the target computer. You don't have to install Power Point on the target computer to open a power point file.
You don't have to install word on that system to open a word file.
You don't have to install Excel on that system to open an Excel file.
So you are ONLY opening a file that just happens to be on some other computer.
So the Access database engine and software MUST be installed on your computer (no .exe possible here). You can most certainly package up your application as an installable windows application that then can be installed on each computer. So a free edition of the Access runtime is available, but you still going to have to install that free version of Access on computers that use Access, even if it is the free runtime edition. However, these days, I not really aware of any popular development system that produces just .exe files without requiring a runtime of some kind, be it .net, VB6, Java, or in this case Access – so some kind of support and runtime files are quite much a common requirement in most systems in use today.
So, just keep in mind you are opening a plane Jane windows file.
As such, your path name of http, or FTP is not a allowed windows path name and is not a windows file/networking system. As such a path name has nothing to do with windows networking and opening of a simple file sitting on the hard disk. So HTTP or FTP etc. are not based on windows networking and file system.
I don’t think this basic concept is too hard to grasp, but at the end of the day the concept you need to grasp and learn is that when you open a windows file sitting in a folder on the hard drive, then then will you need the windows file system to open such files. The idea and concept of opening a file in a folder might be new to you, but it is a basic requirement and understanding you need to solve this issue.
As noted, you can consider a VPN, but I explain why such a setup is not going to work in this article:
Using a wan with ms-access? How fast, how far?
http://www.kallal.ca/Wan/Wans.html
(do read the above – as it explains that you CAN open such files over the internet, but ALSO explains that such connections are WAY TOO SLOW! – remember high speed internet is WAY TOO SLOW here for this use!).
I suppose another possibility would be to consider the new web publishing ability that Access has. In the following video note how I switch to running the Access application 100% in the browser. The resulting application does not need any ActiveX or Silverlight. So the web pages run + work fine on my smartphone and even my iPad.
http://www.youtube.com/watch?v=AU4mH0jPntI
So you can use the new web publishing feature, and that would allow one to use http: to use the application
I have a website that occasionally needs to have a handful of the tables in its database updated. The updates come from another system that exports to comma delimited text files. I can then either FTP the text files to the web server, send them in through an admin upload page, or manually log in to Remote Desktop to download the text files. I have all my C# code written to parse the files, check the database contents, and decide what to do.
Should I code the sync logic to be part of a file upload page, protected in the admin section of the site or should I create a Windows Service that constantly looks for files to process in a particular directory that I can drop files in through FTP?
I have used Windows Services in the past and they have worked great, but if I ever have to make a change to the code it can take longer than it would if I just had to modify an ASPX.
Are their security benefits one way or another?
Performance benefits?
ASPX page wins the "ease of maintenance" category.
I would create a Windows Service to watch a secure folder and use a directory watcher to look for new files. Since the files are coming from another system, it is asynchronous in nature, and it is much more performant to have a Windows Service running separately to watch for updates as they happen. It can also parse the files and update the database for you.
Depending on who maintains the remote system, the easiest way is to grant permission to the service to access the files on a secure, shared folder. Then you won't need to do anything manually.
I have a web application in asp.net and C# that must access a remote server to copy some files. The web application basically deploys other web applications.
Let us say that the web app runs on a "developement" server and needs to interact with a "production" server. From the user's point of view they are both remote machines. He accesses the application (running on the "developement" machine) on his browser and does not see the code and the access credentials to the "production" machine.
At some point, it needs to copy .ascx, .aspx, .cs files from the developement to the production machine. I hope this is clear ^___^
Can anyone tell me what is the best way to do the file transfer?
Thanks!!!
Sep
If the machines are on the same network, a simple File.Copy using UNC paths (\\myserver\sharename\folder\file.ext) will do the trick.
If they are further apart, you could use FTP (FtpWebRequest on MSDN) to send files to a remote FTP server (assuming there is one) - or host an FTP server on your development machine (IIS can do that) and have the production machine download from it; regular HTTP would work in that instance too.
Finally if there are firewalls and god-knows-what-else in the way, you could write a web service/request handler on your deployment server that will serve files to the remote machine, which downloads them.
Unless you have LAN/UNC network access to the remote machine, there will almost certainly need to be a component installed on the remote machine to facilitate the copy.
To set up the application (copying files won't necessarily do it; you might need configuration too) you can use WMI, to script IIS actions - or you can use the System.Management classes to do this straight from .NET:
http://learn.iis.net/page.aspx/163/managing-applications-and-application-pools-on-iis-70-with-wmi/
Hope that helps, or at least gives some food for thought..