C# Calling a function but string is null

Question

I am trying to check a value of string.

However sometimes the string may contain a null value.

 Boolean checkValue =  segment.CheckStringValue(stringValue)

When this happens then I get the following error nullreferenceexception was unhandled

Is there a way to avoid this from happening?

I'm presuming either segment is null or stringValue is null.. Is the exception within the method CheckStringValue or not? — Dave Lawrence, May 29 '15 at 09:52

fubo · Answer 1 · 2015-05-29T09:53:02.767

2

replace

Boolean checkValue =  segment.CheckStringValue(stringValue);

with

Boolean checkValue =  segment.CheckStringValue(stringValue ?? String.Empty);

or handle a null value within your method if (value == null) ...

edited May 29 '15 at 09:53

answered May 29 '15 at 09:51

fubo

The method title `CheckStringValue` would lead me to believe it would be better to have a check inside the method, Not much to be gained by checking against a different string. (Throwing the error might actually be the better thing to do) – Sayse May 29 '15 at 09:58

score 0 · Answer 2 · answered May 29 '15 at 09:53

0

You can try doing this:

String stringCheck = "";
if(stringValue != null
  stringCheck=stringValue;
Boolean checkValue =  segment.CheckStringValue(stringCheck);

answered May 29 '15 at 09:53

Ofir

2 Answers2