Object reference not set to an instance of an object - Error throwing when the list is empty

(0) Share

Report

Posted on by Adam123

534

Hi Guys,

When we get the list value has "null" in the contract class the process get stopped here and throwing the error as "object reference not set to an instance of an object"

code -

If (contract.parmlistId().elements())

Please help me to solve this.

I have the same question (0)

All responses (4)

Answers (2)

Sort by

Adam123 534 on at

Like
a
(0)

Report
Copy link

Link copied!

whenever the list is empty this validation is getting failed

Was this reply helpful? Yes No
Verified answer

huijij 19,813 on at

Like
a
(0)

Report
Copy link

Link copied!
Hi jenifer,

The error means that you are referring to an object the does not exist or was deleted or cleaned up. It's usually better to avoid a NullReferenceException than to handle it after it occurs. To prevent the error, objects that could be null should be tested for null before being used.

if (mClass != null) { // Go ahead and use mClass mClass.property = ... } else { // Attempting to use mClass here will result in NullReferenceException }

Was this reply helpful? Yes No
Suggested answer

Mohit Rampal 12,573 Moderator on at

Like
a
(0)

Report
Copy link

Link copied!

Hi Jennifer, This generic error occurs whenever there is null value in the object. Please provide more info on your code or debug your code where you are initializing ListId.

Also, check if contract is not null.

Was this reply helpful? Yes No
Verified answer

GirishS 27,843 Moderator on at

Like
a
(0)

Report
Copy link

Link copied!

Hi jenifer,

To check whether list is null or not you can use empty method and then get the elements.

if(!contract.parmListId().empty())

Thanks,

Girish S.

Was this reply helpful? Yes No