Value check return emtpy even if the value exists

tobias.gladh@elmia.se

Vote:

I use this code to check if a value exists and has a value

string showNewsFA = StartPage["NewsFocusArea"] as string ?? string.Empty;

The problem I'm having with some of these is that they return an empty string even though the property exists and has a value. How can that be?

In this case I'm checking for a property of type checkbox if that has anything to do with the problem?

#19630

Apr 22, 2008 11:11

Vote:

You're trying to convert the property value into a string, if that fails (which it will to for a checkbox property), an empty string is returned. Try something similar to this:

bool showNewsFA = StartPage["NewsFocusArea"] != null 
      ? (bool)StartPage["NewsFocusArea"] : false;

#19633

Apr 22, 2008 13:16

tobias.gladh@elmia.se

Vote:

I tried some different ways and I got this to work also

bool showNewsFA = StartPage["NewsFocusArea"] as bool? ?? false;

#19636

Apr 22, 2008 14:14

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Value check return emtpy even if the value exists