Issue in Fortify Null Deference while using substring in C#

Question

We use Fortify to scan the code for our application. In one particular code as shown below

dr["test"] = GetTest(temp.Type!.Substring(0, 1));

Fortify throws null Deference error. So, I changed the code as shown below

dr["test"] = GetTest(temp.Type.Length > 0 ? temp.Type!.Substring(0, 1) : temp.Type);

though I am getting the same Null Deference error. I googled some codes related to null deference but I did not get the exact solution.

Does this answer your question? [What is a NullReferenceException, and how do I fix it?](https://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it) — madreflection, Mar 29 '21 at 18:54

score 1 · Answer 1 · answered Mar 29 '21 at 19:26

1

If the problem is in temp.Type, you could try validating with IsNullOrEmpty. link

answered Mar 29 '21 at 19:26

Juan Ozuna

ya i have checked with isnullorempty. but it still shows same error – Zia Zee Mar 30 '21 at 07:42

1 Answers1