Connecting to SQL Server LocalDB in Delphi -

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i have .mdf database file, want connect file adoconnection , sql server localdb provider

my connection string looks :

data source=(localdb)\v11.0;integrated security=sspi;attachdbfilename="mymdffileaddress";

but when try connect, error shown:

an attempt attach auto-named database file "mdf file" failed. database same name exists, or specified file

i have tried many ways, error above shown!

i have installed sqllocaldb , sql server native client 11.0

on machine can connect own created instance on localdb , database, when want connect file in machine , use default instance , attachdbfilename, error shown

i copied .mdf file default instance folder of localdb , tried connect, same error shown

i searched lot found no correct answer !

i'm using delphi xe 6

did try this?

data source=(localdb)\v11.0;integrated security=true;attachdbfilename=|datadirectory|\"mymdffileaddress.mdf";initial catalog=yourdatabasename;providername="system.data.sqlclient"

is there database instance (v11.0) in machine? open command prompt , type verify:

sqllocaldb info

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