How to overcome the Object reference error?

6 Replies

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Guest User9y ago
Accepted answer
1. last = res.LastOrDefault();
2. string[] final = last == null ? new string[0] : last.Split(new char[] { '(' }).ToArray();
LastOrDefault can return null. Check and return an empty array when true, or your split when false.
Dinesh Santhalingam9y ago
Thanks for your valuable time.@
pritaeas
Guest User9y ago
Hard to say without the code. What line exactly fails? Show your updated code.

What exactly are you running in a scheduler, and which scheduler are you using?

Can you show a stack trace?
Dinesh Santhalingam9y ago
The program runs fine.When i put into a scheduler then the error repeat.@
pritaeas
Guest User9y ago
If res is indeed null, I recommend the following over catching and ignoring any exceptions:
last = res?.LastOrDefault();
string[] final = last == null ? new string[0] : last.Split(new char[] { '(' }).ToArray();
Rafnas T P9y ago
I think in res array doesnt have value please check wha value are you getting in res by putting breakpoint

if you want to externally ignore this error then you can use try catch on thes linse
try
{
    last = res.LastOrDefault();//get the last string of res array
    string[] final = last.Split(new char[] { '(' }).ToArray();
}
catch{}