My understanding of the BCL guidelines was that hashtables/dictionaries should throw when the item is not present. The .NET Framework 1.0 design (which returned null, not throw) was deemed inferior. I don't maintain DTF but the "optimized pattern" for your scenario was to use the "bool TryXxx(out value)" pattern. Does DTF have that?
-----Original Message----- From: vexilar [mailto:s...@sorna.com] Sent: Tuesday, January 20, 2009 12:19 To: wix-users@lists.sourceforge.net Subject: [WiX-users] Expected behavior of customActionData["nonExistentKey"] I ended up writing a method to obtain values from CustomActionData instances: private static string getCustomActionDataValue(CustomActionData customActionData, string key) { try { return customActionData[key]; } catch { return String.Empty; } } So that when I want to do something based on whether key in customActionData is populated or not I can just say if (getCustomActionDataValue(customActionData, "key") != "") { doSomething; } I modeled this after how session["nonExistentKey"] works. Is there a reason why customActionData["nonExistentKey"] doesn't work this way (instead it throws an exception)? -- View this message in context: http://n2.nabble.com/Expected-behavior-of-customActionData-%22nonExistentKey%22--tp2188585p2188585.html Sent from the wix-users mailing list archive at Nabble.com. ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users
