Since a Windows service doesn't run within a user context, what is the "correct" place to put writable data? Is there such a location that is version-independent (I'm thinking Vista vs XP)?
A folder off the AppData folder - use SHGetFolderPath() and get the CSIDL_APPDATA path.
Actually - a service should use CSIDL_COMMON_APPDATA.
What kind of writable data?
Normally, an application would use either a database or a flat file for actual data. For error messages and the like, use the Event Log.
Related
I'm trying to set CommType in connection string for Advantage DataBase Server using Entity Framework 5 and Advantage Data Provider in a .NET Web Application.
Connection string is in properties.config file.
I trie to use ads.ini but I don't know where to put it (I try in wwwroot/site/bin but nothing happened)
I need to set this parameters:
RETRY_ADS_CONNECTS = 5
PACKET_SIZE=512
USE_TCP_IP = 1
I can do this whiteout errors, but not using properties.config file.
AdsConnection conn = new AdsConnection("data source=\\\\SERVER1\\DATA; ServerType=remote;TableType=CDX;CommType = TCP_IP");
Any clue about how to solve this? Using ADS.INI or properties.config file, same for me.
Thank you!
Gaston Brave.
You can use the ADS.INI file for this purpose. Where it needs to be located (or how to tell Advantage where to find it) depends on the OS you're using.
From the Advantage Help file topic ADS.INI:
Windows
In order for the ads.ini file to be used, it must be located in the application directory, the Windows directory, the Windows System directory, or the client's search path.
In addition, if an environment variable exists with the name adsini_path, that path will be used to locate the ads.ini file. This can be helpful when you do not want to modify the application’s search path, but still need the ads.ini file to exist in a directory multiple users have rights to (for example on Windows Vista installations). An application can often set the environment variable at run-time before calling any Advantage functions, which avoids the need to set a per-workstation environment variable.
Linux
In order for the ads.ini file to be used, it must be located in the application directory, a directory specified in an environment variable named ADSPATH, in the users home directory, or in the /etc directory. If located in the users home directory the ads.ini file should be named .ads.ini (note the initial "dot").
I have a file stream that I want to store in iOS under a subfolder under the SpecialFolder enum.
The FileStream constructor wants the subfolder structure to exist first and when I try to create it, I get UnauthorizedAccessException.
Suppose my intended location is
Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "/folder1/file1.xls";
which, in my session, resolves to
/var/mobile/Containers/Data/Application/035ECE7D-0E9F-4DF9-927B-B79FB31AEE01/Documents/folder1/file1.xls
Then I make sure the location exists
if (!Directory.Exists(filepath))
{
Directory.CreateDirectory(filepath);
}
which, according to Microsoft, should work
Instead of having the subfolder created and the file stream happily saving the file into it, the CreateDirectory method throws this:
{System.UnauthorizedAccessException: Access to the path "/var/mobile/Containers/Data/Application/035ECE7D-0E9F-4DF9-927B-B79FB31AEE01" is denied.
I thought MyDocuments was free to do stuff in? I've seen no documentation that says I have to apply for permission first. Where should I be creating folders?
If you code with Visual Studio, try to run the program in administrator (Visual Studio), after run your project. Maybe it’s the good solution.
You can try to create platform specific classes for working with saving files and use DependencyService for calling your methods. For iOS app I used this folder enum: Environment.SpecialFolder.Personal and that worked for me.
On my LAN I have 2 applications running in server/client mode developed with Delphi (but I don't think this is important).
On server PC (where run server application) there is a USB hard disk, this hard disk have many folder and subfolder shared on LAN.
Now I need to do this:
1. The server application must send to client application a shared folder (for example "d:\folder\subfolder\", then the client application must open this path to show the files (using explorer).
2. The user, using client application, must select a shared folder (for example "\SERVER\folder\subfolder\") and send this to server application, the server application must convert this path in local path (for example "d:\folder\subfolder\") and save it inside a database.
My problem is: is there a simple way to:
1. Convert the local path to remote path before send it to client se the client can open it easily?
2. Convert the remote path to local path before save it inside database.
NOTE: the main folder or main drive of shared hard disk can be change.
NOTE2: I'd like use IP address and not windows pc name if possible because it can be change.
I hope I explained.
Thanks
If I understand you correctly you want to acces some files that are inside some shared folder. Right?
If that is true then go and acces to these files unsing the network path which is formed in this manner
\\Networkedcomputer\SharedFolderName\Subfolder\...
where:
NetworkComputer is either a name of computer that is sharing that folder or its IP adress. I asume you are interested in using of IP adresses since you already have acces to that information from your other networked components.
SharedFolderName is the network name that was chosen when specific filder was set to be shared on the network. This name doesen't even have to be the same as the name of actual folder
Subolder can be any subfolder of the share folder
In order to get networked path to your shared folder you do need to know network name of the shared folder.
Perhaps you could even retrieve this information from SelectDirectory method which shows special dialog for selecting of directory, but I'm not sure if it does support networked folders. If not you could make use of OpenDialog.
NOTE: In any case when selecting the shared folder either with the use of SelectDirectory or OpenDialog you would need to go to that folder through Network Places (Network -> MyComputerName) and not directly through MyComputer.
But if you need to aquire the shared name for any local folder programatically I think you would have to go and read that information from registry as I'm not sure there is a specific API call for this.
EDIT: The answer on SO question below refers to several Delphi components that can be used for managing of Shared network resources. So I guess you could use to retrieve the network path for a shared local folder but I haven't tried them out.
How do I remotely obtain a system's network shares and connections?
Where exactly is the IsolatedStorage on the android devices. I would have expected it to be in the /mnt/sdcard/Android/data/[packagename]/ location, but it is not. I used the File Explorer (from eclipse) to try and find it, but I can't.
If I can somehow load a html page into the WebView or play a video from IsolatedStorage, then I won't need this actual path. But, I don't want to copy the movie to a temporary location in order to play it, I might as well just store it on the SD Card.
The reason I am using IsolatedStorage is to minimize the custom code across the platforms, I am developing for the Windows Phone, which only allows for IsolatedStorage.
To determine the directory in which your "isolated storage" aka internal storage is kept, use the GetFilesDir() method. This method is part of the Activity base class. It is to be used for files you do not want other applications to have access to.
Other useful methods
GetFilesDir():
Gets the absolute path to the filesystem directory where your internal files are saved.
GetDir():
Creates (or opens an existing) directory within your internal storage space.
DeleteFile():
Deletes a file saved on the internal storage.
FileList():
Returns an array of files currently saved by your application.
See the android developers documentation for more details
I found that IsolatedStorageFile points towards internal memory only.
I used the Context.GetFilesDir() and the Context.GetExternalFilesDir() depending on the user's selection.
I'm having problems with deciding where to store files uploaded by user in my asp.net mvc application.
I've been using asp classic for about 10 years now, and always stored my files on disc at the site, and storing filename and folders in database.
How would you guys approach this problem?
Having them in database, and might get performance issues there? or leave it the way I always done it, and might get problems with "sync" filesystem and db?
I must have some sort of relational info in the database, so I cant store them just on disc
I'm using sql 2005 atm, and I read somewhere that sql 2008 has some sort of datacolumn now that just stores a "pointer" (like the text-datatype) to a file on disc, is that the way to go?
In some way, database is called a database for some reason, so not sure why invent wheel again? :)
Any pointers or ideas would be appreciated, I guess I'm just wondering about problems I might run into if I go with the database-approach
/M
You could use the special App_Data folder to put uploaded files and store the path into the database. If you go with SQL Server 2008 then you could take a look at the FILESTREAM type.
I'm not sure if your web application is load balanced or not, for the file management systems I've built in the past, I have always stored my files on a SAN or a network shared drive so they are accessible to all web/app servers. In addition, rather than storing the files as is, I always change the file name and type before I persist them on the file system (I typically use a GUID as the file name and a random file extension). Lastly, I would store the original file information in the database the files can be moved or copied logically rather than physically.