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Im developing this desktop app for study reasons
but im using SQL Server for database management so reading around the web i find some articles on this and why it is bad practice, i cannot move my entire project to another PC without installing SQL Server. then i find this:
Save and load inventory
So i don't know what method of saving and loading information I need for this project, I think in SQL Lite or maybe I can use a simple file to save all the information like the mentioned post.
Im using a DB with relationships and i dont know if i can made it with a data persistence file. What should I do? what is the best practice?
PD: Sorry for my bad english
Usually your SQL Server would be hosted on a remote computer when used outside development, but it depends on exactly what your application is supposed to do.
If it's a requirement for you to be able to switch computers, and not host your database on a remote server, I'd say using SQLite is a good choice.
Alternatively, you could have 1 big file that has all your data instead of a relational database, although I wouldn't really recommend it. It's good for quick prototyping of things, but all your data would be denormalized, which can end up being more effort to work with than SQL. This is what the inventory example you linked does.
If you are planing to move your application on different computers and don't want to install any database management system there then SQLite is the best option.
All of your data will be stored in one file and you can freely move your application an other PC without installing any database management system there.
Here is good article explaining that in which scenarios SQLite is good choice.
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I have created a web system to display a timetable of teachers.
Teachers have a desktop application (used C#) in their laptops with the same system as web system.
THE CASE IS;
- When the teachers connect to Internet they can fetch the timetables allocated for them.
- Teachers are allowed edit the timetable using their desktop application.
- They must have the ability to sync it to the web system when Internet connection is there.
PROBLEMS:
- I have no idea about how to sync these updated data to the online database.
- How can I temporarily store the fetched , and (or) edited data in the desktop application without creating a temporary database?
- Is there any technology/ plugin to do this task easily?
IMHO, the best option would be to have a local store that can store the application data and sync up with the server whenever the internet connection is working.
The mode would be a database, however, a secure file system also sounds fine.
There is a great deal of thought process involved with using the offline sync model. There should be a conflict check with the server before any data gets overridden to the db. Also, the client app should not loose data between restarts.
I would suggest that you decide on the right approach to sync data, prepare and review the process and consider Various algorithm's for the sync. In case of any specific questions, please post your questions here.
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I need to develop a standalone windows application that will work offline. I have decided to implement it using C# and WPF.
However because the application database should be able to run without having to install Sql Server on the client's desktop, am not sure what's the best approach.
The concept is that i will develop the application give the executable to the client, install and run the application without any complexity of connecting database.
So far i am considering to use SQLite.
My question is what's the best solution to connect a database within the application.
SqlLite is the best option to go so as to have both the sql features
and also a offline db.
If the data is very, very simple, and you need
it to be readable by other applications or users (with appropriate
permissions), I would probably choose to store it in an XML file or
even a plain-text file inside the user's Application Data folder,
which would be obtained via Environment.GetFolderPath.
If you want to store files such as images,etc then you should go for
IsolatedStorage.
Use EntityFramework to connect to SQLite, my preference is always to use the code-first database so everythings managed from your C# code, I believe EF can be modified to implement INotifyPropertyChanged on your behalf which will help setting up your bindings in WPF.
XML shouldn't be used for anything except for configuration IMHO, it will soon be deprecated in favour of JSON, I'm sure of it, not that that really affects you.
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I'm trying to create a simple multiplayer game. As I understand the main principle is to make clients communicate ether directly to each other or to the server. Since I want some game data to be available online on my website, I'm inclined to create database that users will be connected to.
Is this valid?
Is SQL/MySQL good idea to use in such scenario?
Would windows azure be any help?
Please help me. I really need some guidance here.
If you want to store game data for use on a web site, you will definitely want to store it in some sort of database. Just so you know, SQL is a querying language for databases, MySQL is a DBMS (Database Management system) that you use SQL to "talk" to.
However, you certainly don't want to store ALL of your game interaction in a database, as database operations tend to take a long time (at least as far as a computer is concerned). Your server should have some sort of socket (probably TCP) that is talking to all the clients, passing messages and so forth.
The class reading from this socket would raise events or otherwise update the database for the information you want to be displayed on your website. Windows Azure would be a perfectly valid hosting platform for the website/server app, and so would pretty much any other web hosting solution. Some of the socket code could be easier going through Azure, so that may give it an advantage when choosing your host.
Please let me know if I can provide any more information.
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I am not a very experienced programmer. And I am facing technical issues in database servers.
I have developed a small standalone C# Application which is already in use.
It uses SQLite database. The database usage is not very heavy. Only a few form needs to be read and write to the database.
Now there is a requirement that it should be used on LAN.
I know that SQLite is not a good database option for client/server.
But keeping these points in mind should I change the database or not..
The application is already using SQLite and this is not a project from start.
The database usage is not very heavy. Only a few forms will be filled and data is written on the database.
At most 1-4 Pc's will be using the application simultaneously.
I had tried to install MS SQL server on my customers PC but then I am facing so many technical issues and it is taking a lot of time.
So I am thinking to stick with SQLite only.
Any suggestions will be greatly appreciated.
So is your question "Can I share a SQLite database between multiple workstations", or "How to install SQL Server"?
I'd say go with the last. SQLite even promotes the use of a client-server DMBS if you require multiple processes accessing the same database.
Installing MS SQL server can be pain; you have to ensure .NET framework is installed, windows service pack is installed and MSI has correct version. Still I would prefer going that way, because of robustness and reliability it promotes and rather write some robust installer to "make it happen".
You can of course, keep your current solution and write web service that will lock access to database to one-client & one-query at time only and rewrite your app to use this service instead of accessing db directly.
Btw. - Microsoft SQL Server Compact Edition is working similar to SQLLite (in the terms ease of install), and it allows multiple connection to the same database (.sdf file)
http://technet.microsoft.com/en-us/library/bb380177%28SQL.90%29.aspx
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I am working on a C# windows forms project with a friend and we are using TFS for our source control. The program we have written scrapes data off a couple of webpages at regular time intervals and this is updated to the UI.
However, we would like to be able to store this data for future reference. We will be gathering around 1000 bits of data every few seconds for several hours a day.
I'm relatively new to programming and know very little about databases and couldn't find anything on the internet about how to use them with team foundation server. What's the best way to store this data so it is accessible to both me and my colleague?
So far, we've used local XML files but as I say we need somewhere to centrally store the data.
Sorry if there's any information you need that I've missed off - this is the first question I've asked on a forum - but let me know and I'll provide any info I can.
I look forward to your help,
There is nothing specific about TFS that would keep you from using databases.
If you have installed Visual Studio as your IDE to work with TFS as your source control you probably have a copy of SQL Server Express installed. I would look into how to utilize that. You may want to look at Linq to SQL or ADO.Net to provide your connectivity to your database from your applcation. You will likely get a great deal more flexibility and performance depending on how much data you are collecting if you keep it there vs files.
ADO.Net Tutorial
Linq to SQL Tutorials
Entity Framework
Create a .txt file and every time the service runs append a new line to the text file.
How to add new line into txt file