確定是否安裝了SqlLocalDB

Question

我正在尋找一種方法來確定在WiX中是否安裝了SQLLocalDB。我怎樣才能做到這一點？ - 我可以檢查註冊表項嗎？ - 當是，哪個鍵？

Answer 1

一個RegistrySearch應該這樣做：

<Property Id="LOCALDB"> 
    <RegistrySearch Id="SearchForLocalDB" Root="HKLM" 
        Key="SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL11E.LOCALDB\MSSQLServer\CurrentVersion" 
        Name="CurrentVersion" 
        Type="raw" /> 
</Property> 

這將讓你的版本。

Answer 2

從註冊表中檢查可能無法一直工作，因爲如果用戶卸載localDb，則註冊表項可能仍然存在。

這裏是我使用來識別命令行中的LocalDB安裝的功能 -

internal static bool IsLocalDBInstalled() 
    { 
     // Start the child process. 
     Process p = new Process(); 
     // Redirect the output stream of the child process. 
     p.StartInfo.UseShellExecute = false; 
     p.StartInfo.RedirectStandardOutput = true; 
     p.StartInfo.FileName = "cmd.exe"; 
     p.StartInfo.Arguments = "/C sqllocaldb info"; 
     p.StartInfo.CreateNoWindow = true; 
     p.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden; 
     p.Start(); 
     // Do not wait for the child process to exit before 
     // reading to the end of its redirected stream. 
     // p.WaitForExit(); 
     // Read the output stream first and then wait. 
     string sOutput = p.StandardOutput.ReadToEnd(); 
     p.WaitForExit(); 

     //If LocalDb is not installed then it will return that 'sqllocaldb' is not recognized as an internal or external command operable program or batch file. 
     if (sOutput == null || sOutput.Trim().Length == 0 || sOutput.Contains("not recognized")) 
      return false; 
     if (sOutput.ToLower().Contains("mssqllocaldb")) //This is a defualt instance in local DB 
      return true; 
     return false; 
    }