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https://github.com/karenpayneoregon/localdb-samples

Learn to create SQL-Server LocalDb in code and more
https://github.com/karenpayneoregon/localdb-samples

csharp-core localdb sql sql-server

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Learn to create SQL-Server LocalDb in code and more

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README 

        
![img](assets/csharpSqlServer.png)



# Working with SQL-Server Express-LocalDb



This repository has code samples for working with SQL-Server [LocalDb](https://docs.microsoft.com/en-us/sql/database-engine/configure-windows/sql-server-express-localdb?view=sql-server-ver15) databases using C# 9 (or higher), .NET Core 5 (or higher). Each code sample will have a readme file explaining purpose and details on how to use plus any caveats.



# Recommended



Expected developer experience level, has a decent understanding for working with SQL and Entity Framework Core.



---



Microsoft SQL Server Express LocalDB is a feature of SQL Server Express targeted to developers. 



> LocalDB is a special, low impact version of the SQL Server engine, that is not installed as a Windows Service, but launched (made to run) on demand by the ADO.NET client opening a connection to it. It is intended for single user scenarios, and not for any production use - for production you should use SQL Server Express (or higher)



[ErikEJ](http://erikej.blogspot.com/2011/01/comparison-of-sql-server-compact-4-and.html)



![image](assets/screen1.png)



- **12/05/2021** Only one code sample, how to create a localDb in code. 

- **12/14/2021** Added code in LocalDbLibraryConsoleApp to create a LocalDb version of NorthWind database

- **12/14/2021** Added Entity Framework Core 5 class project which relies on LocalDbLibraryConsoleApp to first create the database.

 



| Project  | Description

| :--- | :--- |

| LocalDbLibrary | Code to create a localDb in code |

| NorthWindLibrary | Uses NorthWind database created in project LocalDbLibraryConsoleApp |

| LocalDbLibraryConsoleApp | Test project for LocalDbLibrary |



# Special note



Creating the database in the console app then attempting to in the windows form app or reverse will cause a runtime exception as the database can not be duplicated. So after running one of the projects and want to run the other detach/delete the first database which is easy in SSMS.



# Requires



- SQL Server Express [LocalDB](https://docs.microsoft.com/en-us/sql/database-engine/configure-windows/sql-server-express-localdb?view=sql-server-ver15) installed

- Visual Studio 2019 or higher

- In some cases proper permissions to SQL-Server

 

# Recommendations



Have [SSMS](https://docs.microsoft.com/en-us/sql/ssms/download-sql-server-management-studio-ssms?view=sql-server-ver15) (SQL-Server Management Studio) installed



#### See also



[SqlLocalDB Utility](https://docs.microsoft.com/en-us/sql/tools/sqllocaldb-utility?view=sql-server-ver15)



[Command-Line Management Tool: SqlLocalDB.exe](https://docs.microsoft.com/en-us/sql/relational-databases/express-localdb-instance-apis/command-line-management-tool-sqllocaldb-exe?view=sql-server-ver15)



SqlLocalDB.exe is a simple tool that enables the user to easily manage LocalDB instances from the command line. It is implemented as a simple wrapper around the LocalDB instance API. As in many similar SQL Server tools (for example, SQLCMD), parameters are passed to SqlLocalDB as command-line arguments and output is sent to the console.



Use the **SqlLocalDB utility** to create an instance of MicrosoftSQL Server 2016 Express **LocalDB**. The SqlLocalDB utility (SqlLocalDB.exe) is a simple command line tool to enable users and developers to create and manage an instance of SQL Server Express LocalDB. For information about how to use LocalDB.



[Create a SQL Server Database programmatically by using ADO.NET and Visual C# .NET](https://docs.microsoft.com/en-us/troubleshoot/dotnet/csharp/create-sql-server-database-programmatically)



This article describes how to create a SQL Server Database programmatically by using ADO.NET and Visual C# .NET. Which is from Microsoft which is good but lacks details and options found in LocalDbLibrary.Classes.[DataOperations](https://github.com/karenpayneoregon/localdb-samples/blob/master/LocalDbLibrary/Classes/DataOperations.cs)



[Creating a Connection String and Working with SQL Server LocalDB](https://docs.microsoft.com/en-us/aspnet/mvc/overview/getting-started/introduction/creating-a-connection-string)



# Version details



From a command prompt `sqllocaldb.exe i` to get instances on a machince then to get information for a speccific instance `sqllocaldb.exe i "MSSQllocalDB"`.



![img](assets/localDbInfo.png)