[C#]取得Windows .NET Framework版本資訊(Query registry)

2016-06-09

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.NET

因為佈署前要確定客戶生產環境上幾台機器的.NET Framework版本，上一次筆記查詢.NET Framework Command line、PowerShell方法，這一次來筆記用c#取Registry來判讀。

上一次筆記

[PowerShell]取得Windows .NET Framework版本資訊

1.程式using Microsoft.Win32

using Microsoft.Win32;

2.依Release Number來判讀版本

private static void Get45or451FromRegistry()
{
     using (RegistryKey ndpKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32).OpenSubKey("SOFTWARE\\Microsoft\\NET Framework Setup\\NDP\\v4\\Full\\"))
     {
         if (ndpKey != null && ndpKey.GetValue("Release") != null)
         {
             Console.WriteLine("Version: " + CheckFor45DotVersion((int)ndpKey.GetValue("Release")));
         }
         else {
             Console.WriteLine("Version 4.5 or later is not detected.");
         }
     }
}

private static string CheckFor45DotVersion(int releaseKey)
{
     if (releaseKey >= 393295)
     {
         return string.Format("4.6 or later ,releaseKey = {0}", releaseKey);
     }
     if ((releaseKey >= 379893))
     {
         return string.Format("4.5.2 or later ,releaseKey = {0}", releaseKey);
     }
     if ((releaseKey >= 378675))
     {
         return string.Format("4.5.1 or later ,releaseKey = {0}", releaseKey);
     }
     if ((releaseKey >= 378389))
     {
         return string.Format("4.5 or later ,releaseKey = {0}", releaseKey);
     }
     // This line should never execute. A non-null release key should mean
     // that 4.5 or later is installed.
     return string.Format("No 4.5 or later version detected,releaseKey = {0}", releaseKey);
}

3.測試MBP