Business Logic Set New Criteria

Question

0.00/5 (No votes)

See more:

I have a code that can add and update record into database.All the database and code had been done but there is a problem is i need to assign the

C#

row.gen_modifyUser = SYSTEM_USER_LOGIN.UserName;
row.gen_entryUser = SYSTEM_USER_LOGIN.UserName;

in business Logic layer with the code become not null.
Here is my business logic code:

C#

public static bool TMS_GET_PROXIMITY_VALID_TO_USE(string s_proximityNumber)
        {
            bool b_valid = true;
            using (TMPB_attn_DAL dalTMPB_attn = new TMPB_attn_DAL())
            {
               dalTMPB_attn.SetNewCriteria("gen_modifyUser", s_proximityNumber != null);
               dalTMPB_attn.SetNewCriteria("gen_entryUser", s_proximityNumber != null);
               return b_valid;
            }
        }

I had set the gen_modifyUser and gen_entryUser equal to not null but it doesn't work!!!It will pop out the error object reference not set to an instance of an object
can anyone help me figure out where i had done wrong?

Posted 12-Apr-15 21:43pm

Yuki Ling

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2015-04-12T22:05:00

So use the debugger.
Run your code in the debugger, and either wait until the exception happens - in which case the debugger will stop on the line causing the problem - or put a breakpoint at teh top of the relevant method and wait until the debugger hits it.

In either case, you can then examine your variables to find out which one is null and causing the problem (any attempt to access a property, field or method of a null value will give you this exception) and then look back through you code to work out why is does not have a valid value.

We can't do that for you: Remember that we can't see your screen, access your HDD, or read your mind, so we can;t run your code and find out what the problem is!