c# - provider: SQL Network Interfaces,error:50-Local Database Runtime Error occurred. he specified LocalDB instance does not exist

Question

I create an c# windows form application .for database i used sqlserver localDB. after creating setup file of project it run correctly in my pc.but when i installed it in another pc i had this error:

"An error occurred: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The serer was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections.(provider: SQL Network Interfaces,error:50-Local Database Runtime Error occurred. he specified LocalDB instance does not exist.)"

i searched much for fixing this error and just found something like (being sure that Microsoft sql server express LocalDB vX installed) but this didn't work.

my connection string:

Data source=LocalDB)MSSQLLocalDB;AttachDbFilename=D:Daneshdesk1ackFINALLpypropyproappDB.mdf;Integrated Security=True

in my pc and another pc ( Microsoft sql server express LocalDB 2012) installed.

i used some prerequisites in setup file properties like(sql server express LocalDB 2012 and .NET framework 4.7) .these are installed in my pc and another one.

Answer 1

等待大神答复