Adapter.InsertCommand.Parameters.AddWithValue NullReferenceException

Ok, I have an issue that I cannot seem to grasp. As per the title of the post, I am receiving a NullReferenceException when I access a stored procedure from a DataGridView in a C# application. The line of code that keeps throwing the exception is:
this.spPullAssignedAssetsTableAdapter.Adapter.InsertCommand.Parameters.AddWithValue("@aUser", Variables.userName);

Open in new window

userName is coming from a class called variables. The call for that variable is:
public class Variables
        public static string userName;

Open in new window

The ultimate conclusion to this task is to pass the userName variable to the stored procedure connected in the data adapter.

I have no idea what I am doing wrong. Following the debugger, I can see that the variable is being passed through correctly, but i have no idea why the NullReferenceException is being thrown.

Thank you for your time and any help is greatly appreciated.
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

How is this.spPullAssignedAssetsTableAdapter.Adapter.InsertCommand? How are you setting it in your code?
SirjacksinurboxAuthor Commented:
Do you mean how is the above line of code being called?

If so, its being called in the frmAssetsAssigned.Designer.cs code.

Nothing I have (any variable associated with this line of code, including the variables in the stored procedure) have any null reference associated with them.

If I need to move it away from the Designer.cs , any direction would be greatly appreciated.

I mean you are appending parameter for this.spPullAssignedAssetsTableAdapter.Adapter.InsertCommand object but before that have you checked nullability of this object? In other words, this object (InsertCommand) for desired Adapter object should be set to some not null reference before we set its parameters.
10 Tips to Protect Your Business from Ransomware

Did you know that ransomware is the most widespread, destructive malware in the world today? It accounts for 39% of all security breaches, with ransomware gangsters projected to make $11.5B in profits from online extortion by 2019.

SirjacksinurboxAuthor Commented:
Oh, I see.

Forgive me for sounding like a complete novice (for which I pretty much am), but how do you set that variable to something else before you assign the variable to it? (Especially since it takes two parameters)

Also, would it make more sense to place this line of code in the form load method of that form, instead of the Designer.cs?
I would suggest check its nullability in your form load event like
if(this.spPullAssignedAssetsTableAdapter != null)
      if(this.spPullAssignedAssetsTableAdapter.Adapter != null)
            if(this.spPullAssignedAssetsTableAdapter.Adapter.InsertCommand == null)
                  this.spPullAssignedAssetsTableAdapter.Adapter.InsertCommand = <<Creation logic>>
            Next steps..

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
SirjacksinurboxAuthor Commented:
It wasn't exactly what I was looking for, but it gave me the idea to look to LINQ instead.

Thank you.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.