Global variables (ish) in C#

Global variables (ish) in C#

• PRSDeveloper

  Javawag,

  It might seem to work now, but it may not in the future. RegistryKeys are not designed to be used as static fields. I would really recommend that you go down the road of creating the RegistryKey each time, like I suggest above.

  
  
  

• KyleLewis

  ok, so how would I declare that, and where

  Thanks,
  -Javawag

  
  

• SanooD

  Javawag,

  That's right, but wrap the registry key usage in a using like I did above, so that Registry Key is closed.

  As per the second question, start up a thread and post in the Windows Forms forum.

  
  
  

• bslim

  hi,

  you can do something like this

  read the value of your key from the registry

  string bestTime = (string)Application.CommonAppDataRegistry.GetValue(myKey);

  change the value of the key in the registry

  Application.CommonAppDataRegistry.SetValue(myKey, Value );

  or you can save your variables in xml, or you can use static fields something like that

  class Program

  {

  static void Main(string[] args)

  {

  GlobalVars.MyfirstVar = "Any string";

  Console.WriteLine(GlobalVars.MyfirstVar);

  }

  }

  class GlobalVars

  {

  private static string myVar;

  public static string MyfirstVar

  {

  get { return myVar; }

  set { myVar = value; }

  }

  }

  hope this helps

  
  
  

• racka4279

  Ok so is this alright :

  Declaration:
  public static Microsoft.Win32.RegistryKey key()
  {
  return Microsoft.Win32.Registry.CurrentUser.CreateSubKey("software\RockGem");
  }

  Usage:
  Microsoft.Win32.RegistryKey key = global.key();
  key.SetValue("test","test.");

  One last thing, how do you go about closing the first form of an application without the whole app closing I want to close the first form and then open a second form without the application closing completely.

  Thanks,
  -Javawag

  
  

• nguyen_van

  you may use static fileds
  
  
  

• Niels A-J

  sorry, i didn't red your post to deeply.
  indeed it is not a good idea to use registry keys this way. first of all you should rethink this. what for do you need registry keys in of all your forms coyldn't you read them once you lunch your app and then update them while closing the app
  
  
  

• jerv_it

  Thanks !

  In the end I added a new public static class called global and declared the registry key there which seems to work ok and also in the future I can put other methods and variables in this global class and access them more easily!

  Thanks so much,
  -Javawag

  
  

• CMR12963

  You can make use of static fields, see the following post:

  http://forums.microsoft.com/MSDN/ShowPost.aspx PostID=84781&SiteID=1

  However, be aware that I wouldn't make a RegistryKey as a static variable, these objects should only be created on demand and closed when finished. Also static fields need to be thread-safe if you are running multiple threads (for example, by using the BackgroundWorker component)

  Instead I would use a method that simply returned a new copy of the Registry key.

  public static class RegistryKeys { public static RegistryKey CreateKey() { return Microsoft.Win32.Registry.CurrentUser.CreateSubKey("Software\RockGem"); } }

  You can then do this:

  using (RegistryKey key = RegistryKeys.CreateKey()) { // Do something }

  Hope that helps

  David

  
  
  
• Global variables (ish) in C#