"Object reference not set to an instance of an object" in Linq statement

Asked Jul 06 '21 at 05:49

Active Jul 06 '21 at 05:49

Viewed 39 times

var surveyResultItem = _mcniDbContext.SurveyResultsLines.Where(e => e.SurveyOptionId == deleteOption.SurveyOptionId).ToList();

Where my Dbmodel is _mcniDbContext and SurveyResultsLines is my classin it. I have checked that value is not null for deleteOption and SurveyOptionId is present in both of them. There no red line in my code but while running it. it gives error:

Error Message: Object reference not set to an instance of an object.

Exception Trace: System.NullReferenceException: Object reference not set to an instance of an > object. at MCNIDev.Processor.Services.SurveyProcessor.CheckSurveyResultsLines(SurveyQuestions deleteQuestion, SurveyOptions deleteOption) in D:\Projects\mcninew\MCNIDev\MCNIDev\Processor\Services\SurveyProcessor.cs:line 383

asked Jul 06 '21 at 05:49

Anirudh Singh Rawat

1

"*I have checked that value is not null*" -- what exactly have you checked – TheGeneral Jul 06 '21 at 05:51
By applying break points. and i have this statement before it " if (deleteOption != null)". I also passes this code but still shows the error – Anirudh Singh Rawat Jul 06 '21 at 05:53
3

@AnirudhRawat What if `_mcniDbContext` is `null`, or `SurveyResultsLines` is `null`, or an element (represented by `e`) in that list is `null`? – ProgrammingLlama Jul 06 '21 at 05:54

"Object reference not set to an instance of an object" in Linq statement

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