i have some questions about databases and remote connections..
i've made an application that connects to sql server db on local machine then i published the app. and installed it on other machine..
was very bad when i realised that the application won't work except that there are sql server instance on that machine.. :/
am thinking now to use access db instead of Sql Server..
but i don't know if i had to install access on every machine to make the app. work ?? or just the access db file "mdb" is enough to connect and react with data on that db ??
and if i had to install access on the pc that hold the database, do i had to install it on client mashines too in order to access the db on server with remote connection ??
answering these question will rly help me too much.
thx in advance.
No you don't have to install Access. ADO.Net will take care of connection.
Also you can use SQL Server Compact Edition. With adding some Dlls to your project, you don't need sql server installed on client machine as well.
Related
I have made a C# application MySql Database attached I am going to use the Application on a different Computer. According to my Logic. The Mysql database is running on the localhost server of my first PC and I think that the localhost of the other PC will be different. So,My application Won't connect to the server - It's my Idea which may be wrong.
I have the following Questions :-
1.
How do I make a Mysql local server that will even work on another PC.
2.
Do I have to Install MySql on other PC ? If yes How can i include mysql setup in the Setup Wizard of my app.
3.
Do I have to make changes In the Code (Connection or anything).
Please Give any extra suggestion if you have about this.
You do not need to install mySQL on the computer that will have the app. that defeats the purpose of having a SQL Server
You will only need to change the connection string so instead of connecting to Localhost or 127.0.0.1 you will use the ip address of the machine that has the server installed. Connection Strings
I suggest you do some reading about networking, design patterns, and SQL or you risk building a very insecure application.
I am looking into using the new SQL Server Express LocalDB (I think it is code named "Denali") for a desktop application.
It is currently running with SQL Compact, but the user is wanting to share the database between multiple PCs on a network. Unfortunately this is not something that SQL Compact can do, so I am investigating other solutions.
The client requires the ability to send database files easily to other sites or to back them up to a flash disk, so I am avoiding going to SQL Express because there is quite a bit of "administrator" knowledge required to backup and restore.
So, my questions is, does the new SQL Express LocalDB support remote connections to the database over a network and/or through a shared network folder with the mdf file in it?
LocalDB does support supplying a path for an attached local DB in it's connect string (AttachDbFileName) hence the shared network folder option.
NOTE: This question pertains to "LocalDB" the new version of SQL Express 'Denali' and not to SQL Server Express 2008 or prior.
See article here announcing LocalDB's release: http://blogs.msdn.com/b/sqlexpress/archive/2011/07/12/introducing-localdb-a-better-sql-express.aspx
No, SQL Server Express LocalDB doesn't accept remote connections.
The idea with shared network folder might work, but only if you are able to make sure the LocalDB instance is shutdown before you try to copy the file. Also keep in mind that only one LocalDB instance can have any given database file open at the same time. and don't forget about the log files!
Additional security warning: unlike SQL Server Compact databases, SQL Server Express databases (including LocalDB ones) are not designed as secure data exchange format. For instance, they can contain malicious code in .NET assemblies embedded in them. So you should never open databases from untrusted source.
Maybe providing the customer with a simple tool that automates the backup process would be a better idea?
This isn't a fresh thread, but I would like to share my experience with SQL Server Express database LocalDB.
I have a WPF C# project using SQL database with LocalDb Engine. It is working fine no problem, I can use the database with the WPF app. I wanted this app to work on network with more PCs.
On the network another PC can use the database from my PC using UNC path in the connection string.
It seemed to me the remote connection is working. However when the remote PC is connected, I am not able to use the database with my local WPF app. If I run my app first the remote PC could not connect. So this tells me that the remote connection is working, but the multiple connection is not allowed.
OK, I didn't give up and I run the app from my PC twice and I saw it is working which tells me that the same SQL LocalDB engine can handle multiple connections locally only.
I hope this experience will help someone. Thanks.
In short, yes it can. Here is a tutorial on how to configure it.
Also, here is another post with a potential issue that might occur.
Both explain how to configure SQL Server Express to accept Remote Connections.
I have created a CRUD application that is running really well. It connects to SQL on the same machine. I want to publish my C# app and install it on another PC does not have SQL.
Is it possible to run it on that PC, without installing SQL Server on it? If so, how do I do this?
Is it possible to run it on that PC?
Without a database your application is "dead".
You have two options.
Install a sql server it this PC.
Connect to a sql server isntalled in another PC.
It's your choice.
If your project is a small one and the database is less than 4GB and you are not going to install SQL Server on every machine and your client do not have access to a Server with SQL Server then you may want to use SQL Server compact
In this case your database would be an single sdf file and you will connect to it using its path on the machine. Then the connection string would be like this:
Data Source=MyData.sdf;Max Database Size=256;Persist Security Info=False;
For more on connection string see this.
Here is the download link
I am working on windows forms application using c#.net. i have developed an application(3-tier) that uses sql database as backend. i need to deploy the database on server and my app. on client machine. but how could my application communicate with database on server. please guide me.
you need a connection string that works fine during development. On your development machine if the application is connecting fine to the database server, chances are that on your client machine, it would work as well. Sometimes, the problem occurs with the credentials that you use, that might work on the development machine but on the client it wont connect due to the lack of access rights. so you need to make sure that you give proper credentials to connect to the SQL server
You don't need to do any rocket science for this. All you need to do is on the client side use the proper connection string that can connect to a remotely installed SQL Server.
Use EntityFramework for your sql server connection for updating, inserting and deleting.
Use storedprocedures for the insert/update/delete functions.
I am creating a window application that need to use sql server database.
I want to install this application to client machine without installing sql server so that my application can still connect to a database i.e mdf file that i will be providing at client system.
How can i connect to a database(mdf) on client machine through my window application without installing sql server. ?
I dont know is it possible or not.
If possible what will be the connection string in that case. Database need not be used in network.
Client mahine dont need any installation. Every thing needs to be run through pen drive
.mdf files are SQL Server database files. No other application can understand, read or update those files. If you need to open and mdf, you need a SQL instance. That instance can be local, can be an Express edition, or can be a remote one, doesn't matter. If your application needs a local SQL instance for it's own use then it can install SQL Server Express Edition when deployed.
You can try Sql Compact Edition or SqlLite. I think these are just a file based solution.
In that case you must have a server machine where your database files are stored. For that reason you have to use SQL Express Edition 2005 or 2008 in one machine and SQL server management studio to manage your database. Those are all free from Microsoft. The client machines will be connected through the connection string. Those machines don't need SQL instance or SQL server installed.
Regards..
You can search your MS-VS CD for SQLEXPRESS (please note the capital letters) and include it in your software when you create the set-up and your problem will be solved.
You don't have any other way except to use another database like access.
This database doesn't need its software.