SQL server management studio local database connection error in windows 7

Question

I\'m running SQL Server 2012 Management Studio Express in windows 7, i am having issues connecting to the local db. i tried all the above mentioned solutions, didnt work. pl

Answer 1

Try this code:

RegistryKey rKey;
string InstanceName;

//use this string for database connection
string ConString;
string regPath = @"Software\Microsoft\Microsoft SQL Server\UserInstances";
rKey = Registry.CurrentUser.OpenSubKey(regPath);

if (rKey.GetSubKeyNames().Length != 0)
{
    regPath += @"\" + rKey.GetSubKeyNames()[0];
    rKey = Registry.CurrentUser.OpenSubKey(regPath);
    InstanceName = rKey.GetValue("InstanceName").ToString();
    ConString = @"Server=np:\\.\pipe\" + InstanceName +
        @"\tsql\query;Initial Catalog=RahBord;Trusted_Connection=True";
}
else
{
    Process.Start(@"C:\Program Files\Microsoft SQL Server\110\Tools\Binn\SqlLocalDB.exe", "c amirLOCALDB -s");
    regPath += @"\" + rKey.GetSubKeyNames()[0];
    rKey = Registry.CurrentUser.OpenSubKey(regPath);
    InstanceName = rKey.GetValue("InstanceName").ToString();
    ConString = @"Server=np:\\.\pipe\" + InstanceName + @"\tsql\query;Initial Catalog=RahBord;Trusted_Connection=True";
}

If your instance stopped go to this address:

C:\Program Files\Microsoft SQL Server\110\Tools\Binn\ 

and use this command

SqlLocalDB.exe s yourInstance