发布桌面应用程序在我的系统上可以正常工作，但是当我将设置发送给某人时，它不起作用

Question

I have developed a desktop c# application with localdb . While publishing the application, I have selected .net framework and localdb as a prerequisite. The published setup works fine on my system but when I send the complete setup files to any other system it doesn't work.

Here is my connection string

SqlConnection(@"Data Source=(localdb)\mssqllocaldb;AttachDbFilename=|DataDirectory|\StadiumDatabase.mdf;Integrated Security=True")

Here is what I am selecting in prerequisite

The error that I am getting on other systems.

I have gone through so many blogs and articles regarding this and none of the solutions provided is working.

Answer 1

It looks like you have different versions of LocalDb installed on your development machine, and the installation machine. The default instance MSSQLLocalDB used to be named by version in older versions of LocalDb, v11.0 for example. Microsoft changed that to MSSQLLocalDB in a later version of LocalDB.

The fact that you say (localdb)\\mssqllocaldb works on your machine, leads me to believe that you are using that newer version. Your screenshot shows that you have selected LocalDB from SQL 2012, which uses the default instance name v11.0 . This means you will need a different connection string remotely vs during development. Unfortunately, I don't know of a good way to detect the instance name to adjust the connection string.

Running different versions of LocalDB on your development machine, and installing a different version on the remote computer, will probably cause you a lot of headaches, like this one. I recommend either installing whatever localDb version you are developing against on the remote machine, or installing 2012 on your development machine, so that everyone has the same version.

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Based on comments you made, your development machine is running Sql 2016 (db version 852). You either need to install Sql 2012 on your development machine, or install 2016 as the prerequisite.