After creating the setup file in c#.net WPF application, couldnot connect with the sqlserver 2005 MDF file.
The setup file is including the sqlserver MDF file.
plz tell me, what is connection problem?
Just a wild guess (see comments on your question): You're trying to use the "user instance" feature that was introduced in SQL Server 2005? Then the SQL Server 2005 needs to be installed on the target machine as well - maybe only the Express edition. As long as you don't install the SQL Server there's no way you get a connection to your shipped MDF file.
Related
I'm creating an application with C# using SQL Server. I would like to know if it's possible to run the app on a computer which has no SQL Server. My database extension is .mdf
Using a .mdf file on PC without installing SQL Server or SQL Server Express is not possible. LocalDB version also requires LocalDB deployment.
However, you can use .sdf file but it does not support stored procedures. For this, you need to supply necessary dll files in the app folder.
I'm trying to understanding LocalDB by reading MSDN: SQL Server 2016 Express LocalDB and MSDN: SQL Server Express LocalDB and SQL Server Express and a number of SO posts including confusion about SQL Server Express and localdb, I still cannot understand what is LocalDB. I understand and have used SQL Server Express and SQL Server CE.
Questions:
LocalDB...the necessary SQL Server infrastructure is automatically
created and started
My understanding is that, if using LocalDB to handle an application's database, neither the developer nor the client machine where the application is deployed needs to install the heavy SQL Server Express, but just need to install the lighter LocalDB. How, then, without SQL Server Express install can localDB "create(d) and start(ed)" SQL Server? If localDB
... once installed, LocalDB is an instance of SQL Server Express that can create and open SQL Server databases. The system database files for the database are stored in the users' local AppData path which is normally hidden.
If developer or client can use localDB without installing SQL Server, how can localDB be an instance of something that is not installed? Or is localDB an incomplete version of SQL Server Express that just does not need to click..click..click.. to configure. Essentially localDB works like SQL Server CE where localDB use some hidden "files" in AppData to create database while SQL Server CE use the dll to generate the database?
SqlLocalDB.msi program to install the necessary files on the computer
If client still needs to install localDB (which is not really portable along with the application like SQL Server CE), then why not just install SQL Server Express? Either localDB or SQL Server Express is above 100MB+ anyway and need separate installation, what is the point of using localDB anyway?
LocalDB is a programmer-oriented version of SQL Server Express that needs to be installed just like SQL Server Express.
Unlike SQL Server Express, it's not installed as a Windows Service that starts up with your Windows OS - but it only starts up as needed (when your application starts up, or when you start it manually with the SqlLocalDb command line tool).
But LocalDB IS SQL Server Express (not Compact Edition). It uses the same .mdf and .ldf database files like and desktop/server version of SQL Server, not SQL Server CE's .sdf file format.
We used localdb on a project where we had agents in the field using laptops.
The functionality of localdb was better than SQL Server CE (I don't remember exactly what CE was missing, but it was important to the project), you should review the functional differences.
Another advantage was the db was stored in the user folder which makes it impossible for other non-admin users of the laptop to see. This allowed us to reuse and even share laptops between users without mixing data - a nice feature.
Finally, the dbs (with a little effort) can be copied to the dev/support side and restored/attached for troubleshooting. They are full .mdf/.ldf database files.
You do have to create the instances using a command line (sqllocaldb utility), after the product is installed. This was just part of our install app.
I am using Visual Studio 2012 working on a web application, a registration page. I have installed SQL Server 2008 Express and done the configuration but still when when I try to add a SQL Server database file in the project, I get an error
Connection to SQL Server Database file (.mdf) requires SQL Server 2005 or SQL Server 2008 Express to be installed and running on you local computer
Please help I am stuck here.
You need to install the LocalDB or to change your connection string to use the SQL server you have installed, it seems like you are trying to use a MDF file.
I installed Sql Server Express 2008 R2, and created a database file in Sql Server management Studio. Now From Visual Studio 2008 I try to connect, but it fails with error:
Unable to open the physical file
"C:.....mdf". Operating system error
32: "32(The process cannot access the
file because it is being used by
another process.)". An attempt to
attach an auto-named database for file
C:....mdf failed. A database with the
same name exists, or specified file
cannot be opened, or it is located on
UNC share.
...This is first time I use Express. I only used Sql Compact Edition before. Are there some settings here I need to figure out? It's not a duplicate name of other connection, and I have closed management studio completely. Still this error. What am I missing..?
If there are some settings, please give a little detail how I access them, as I'm not used to dealing with databases.
SQL CE is a file based database - SQL Express isn't.
It is a SQL Server - you can add it using the Server Explorer in Visual Studio.
The instance name is normally .\SqlExpress.
I faced the same issue today, and guess what daemon tools was the reason for this problem, so if you have installed daemon tools uninstall it and then try again.
Hope it solves your problem too.
You do not want to be connecting using the mdf. What you want to do is Open a SqlClient.SqlConnection and then using the SqlClient.SqlCommand execute queries on the database, and then read the information using the SqlClient.DataReader, just like you would with A SqlCE database.
If you are trying to add it to the Server Explorer you just need to connect to the database just like you would in SSMS (Management Studio) and then you can use it in your project.
If you created a database in SQL Server, you probably have it attached. In Visual Studio you cannot access this database as a file. You have to access it as an attached database (i.e. by its name).
Generally you can use database in files as well in Express edition. If you for some reason want to use file directly, then go to Management studio, right click on your database and detach it. Then you can connect to it from Visual Studio on file basis.
I have written c# application that uses mdf file for database.when i make setup of that project and runs on other computer having dotnetframework and sql server compact 3.5 then id dose not runs and exception is shown saying something sql server not found or not ready for connection something like that what should i do
mdf is not for sql server compact edition, it is for the real sql server. You need to deploy it to Sql Server Express edition or higher.
Edit:
You can install SQL server express edition or if you want to use the sql compact server you need to create a "local database" in visual studio.
When adding a mdf-database to your visual studio project is is attached to your local sql express database server behind the scenes when you start your project.