How to connect to LocalDb

Question

I installed LocalDb using the SqlLocalDb msi package and I can connect to it using SSMS using the server name  LocalDb  v11 0  So far so good  The problem is that when I try to connect to it via a  NET 4 5 application I get the error      The server was not found or was not accessible    I started with the connection string Data Source  LocalDb  v11 0 and then added many things to no avail  integrated security true sspi  attaching a db  using instances  etc

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I think you hit the same issue as discussed in this post  You forgot to escape your   character

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To locate a DB from SQL Server management studio can be done through browse - in the connect to database screen enter image description here Also make sure a local database is installed during installation  enter image description here

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lt add name  Default  connectionString  Data Source  LocalDb  MSSqlLocalDB  Initial Catalog CRM Default v1  Integrated Security True        providerName  System Data SqlClient   gt       your web config files in visual studio under connectiionString   or Go to View   SQL Server Object Viewer   Add Sql Server  add your server there

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Your Connection string should be like   Data Source  localdb  ProjectsV13 Initial Catalog master Integrated Security True Connect Timeout 30 Encrypt False TrustServerCertificate False ApplicationIntent ReadWrite MultiSubnetFailover False

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I am totally unable to connect to localdb with any tool including MSSMA  sqlcmd  etc   You would think Microsoft would document this  but I find nothing on MSDN   I have v12 and tried  localdb  v12 0 and that didn t work  Issuing the command sqllocaldb i MSSQLLocalDB shows that the local instance is running  but there is no way to connect to it   c   gt  sqllocaldb i MSSQLLocalDB Name                MSSQLLocalDB Version             12 0 2000 8 Shared name  Owner               CWOLF-PC cwolf Auto-create         Yes State               Running Last start time     6 12 2014 8 34 11 AM Instance pipe name  np     pipe LOCALDB C86052DD tsql query c   gt  c   gt  sqlcmd -L  Servers       UID Login ID   PWD Password   Trusted Connection Use Integrated Security     APP AppName    WSID WorkStation ID      I finally figured it out    the connect string is  localdb  MSSQLLocalDB  e g      sqlcmd -S   localdb    MSSQLLocalDB 1 gt  select  hello   2 gt  go  ------ hello    1 rows affected

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You can connect with MSSMS to LocalDB  Type only in SERVER NAME   localdb  v11 0 and leave it by Windows Authentication and it connects to your LocalDB server and shows you the databases in it

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Suppose  SqlConnection connectionObj   new SqlConnection    for   connectionObj ConnectionString -  use server name    localdb   MSSQLLocalDB   Note  Double back slash  for   App config -  use server name    localdb  MSSQLLocalDB  Note  Single back slash

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I was able to connect from SSMS using   LocalDb  Projects   That s the way it appears in VS2012 as well

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Use  localdb  MSSQLLocalDBwith Windows Auth

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Use  localdb  MSSQLLocalDB  That is the LocalDB instance intended for applications  independent of Visual Studio version     Disregard my original answer   With SQL Server 2014 Express LocalDB  use  localdb  ProjectsV12  This works in both Visual Studio 2013 and SQL Server 2014 Management Studio   While ProjectsV12 will indeed give you a LocalDB instance  it s the wrong one  intended for use by SQL Server Data Tools

[ssms] How to connect to LocalDb

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