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C# and .NET

Estela Estela

14y1.6k.NET

how can i verificate if :" txtCitizenship.Text = GlobalBll.GetCitizenship().FirstOrDefault(c => c.CitizenshipId == tofess.CitizenshipId).CitizenshipName;" is NULL or not?

2 Replies

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Vulpes14y ago
You'll need to check whether the expression up to FirstOrDefault is null or not, because if it is, then you'll get an exception when you attempt to access the CitizenshipName property:

var v = GlobalBll.GetCitizenship().FirstOrDefault(c => c.CitizenshipId == tofess.CitizenshipId);

txtCitizenship.Text = (v != null) ? v.CitizenshipName : "";
Santhosh Kumar Jayaraman14y ago
if ( GlobalBll.GetCitizenship().FirstOrDefault(c => c.CitizenshipId == tofess.CitizenshipId).CitizenshipName!=null)
txtCitizenship.Text= (GlobalBll.GetCitizenship().FirstOrDefault(c => c.CitizenshipId == tofess.CitizenshipId).CitizenshipName;
else
txtCitizenship.Text='';