I am going through a tutorial that is adding a simple local database to a C# console application but when adding a new item to the solution I cannot find the Local Database to insert a .sdf database file. I have tried to download SQL Server Compact 4.0 but upon installation it says that SQL Server Compact 4.0 is already installed on the computer. Below is a screenshot of the available data resources I can add.
How would I be able to add a local database file to my solution?
You should use the ADO.NET Entity Data Model and use Entity Framework to generate models from your database. You can select your local database there.
Eventually found this question that has already been answered that solved my problem
How to connect to LocalDB in Visual Studio Server Explorer?
Related
Good day!
I'm trying to create a standalone C# project with a SQL Server database attached so I only need to install a SQL Server Compact Edition.
I managed to connect to the said database and do some basic display, add and delete.
What I'm trying to do now is to have an option for the users to backup and restore the database.
Upon checking the files of the project, the tables and stored procs are in script format. Is it possible for it to be backed-up the same as how .mdf database files are backed-up and restored?
I am also open to suggestions on ways on how to easily have a standalone project be developed. So far this is only what I got. Thanks in advance guys!
I'm new to C#, ado.net and visual studio 2012, just to make that clear from the beginning.
I'm trying to connect an ADO.NET Entity Data Model to a postgresql database.
I tell VS to 'generate mdoel from database' and click to make a new connection. Postgresql is not listed as an alternative data source (I can only see different microsoft mysql sources).
I did download the npsql .dlls and put them in the projects\ folder. I then added them by PROJECT->Add Reference->browse, check them and press ok.
Postgresql does still not appear as an alternative when I try to make a new connection.
In advance, thanks!
I created a project a while ago and transferred it to my other computer, and now it's stopped working. I can't manage to fill the grid with the data from the .mdf.
I have struggled a while with this problem and I can't manage to solve it. I would appreciate if someone here could download the .rar and help me solve this problem.
http://www.filefactory.com/file/3wabxfsyxign/n/CDapplikation_uppgift_rar
.mdf are SQL Server data files; for working with those files, you must have some version (other than Compact Edition) of SQL Server installed
So to get this data out:
check to see what version of SQL Server you have installed
fire up the management tool, e.g. SQL Server Management Studio (possibly the Express version which you can find by searching on Google or Bing and download for free from Microsoft)
attach the .mdf file to the SQL Server under a logical name, so that you can use it
now you can access it using raw ADO.NET or Entity Framework or whatever other data access technology you wish to use
Error -
mdf file can not be opened because it is version 655, this version
support 612 or earlier
Note :
I am created this database file using SQL Server 2005 and later that file is opened in SQL Server 2008 then automatically change version from 612 to 655.
But I currently want to open that file in SQL Server 2005.
Any solution is possible then help me.
Upgrading an mdf is a one-way process. You'll have to go back to a backup, an earlier version of the file or recreate it.
I'm guessing you don't have backups or an earlier version of the file (nobody posting "how do I get something back" on these sites knows what a backup is).
As far as recreating goes, you can attach the database to a SQL Server 2008 instance (or later) and then use SQL Server Management Studio to export the database into a blank database on an '05 instance.
From within Management Studio use the Generate Scripts Wizard. You can use this wizard to build queries that will reconstruct the database. Make sure you choose to script Schema and Data and set the destination server version as SQL Server 2005.
Alternatively, you can use the SQL Server Import and Export Wizard although it may not bring all your database objects across.
I am trying to add a SQL Server data source to a C# console app.
When I try and add a new connection to my .dbml file the only Data Source available is Microsoft SQL Server Database File (sqlclient) whereas I need Microsoft SQL Server (sqlclient).
The change button is grayed out, so I can't change it.
How do I change this?
(I wondered if it was a bug, so tried uninstalling/reinstalling Visual Studio - but still no joy.)
This is actually a limitation of the Express product and you can get around it with a modification of your SQL Server connection string manually. For more information have a look at this SO Post.
I got this working by using the workaround from the post above:
Workaround:
1.Open your solution in Visual Web Developer Express. It will not load some of the projects in the solution but it is ok.
2.Make a new connection in Database Explorer to the required database from SQL Server.
3.Add a new class library project.
4.Add a LINQ to SQL Classes item and link it to your database.
5.Close the solution.
6.Open the solution in Visual C# Express.
Now you have a LINQ to SQL classes library that is linked to your SQL
Server database in Visual C# Express.