Object Reference Not Set To An Instance Of An Object

• Object Reference Not Set To An Instance Of An Object Excel
• Object Reference Not Set To An Instance Of An Object Vb.net
• Object Reference Not Set To An Instance Of An Object Mysql

As ryanb31 suggested, connection1.sqlcommand could be null, another possibility is connection1 to be null.Too bad you did not collect and share this information. Not to worry. This is one of the very easiest cases to detect and fix. It simply means that some member/variable of some reference type is dereferenced by using and of its instance (non-static) members, which requires this member/variable to be non-null, but in fact it appears to be null.

Object reference not set to an instance of an object. Exactly what it says, you are trying to use a null object as if it was a properly referenced object. Most of the time, when you try to assing value into object, and if the value is null, then this kind of exception occur. Re: object reference not set to an instance of an object while signing in. Thank you @v-qiuyu-msft for your response and follow up. Last night a Windows update took place and the problem was finally solved. I do not know what could have happened, but everything is ok now. The problem was not related to the account. Adobe reader 9 offline download.

Simply execute it under debugger, it will stop the execution where the exception is thrown. Put a break point on that line, restart the application and come to this point again. Evaluate all references involved in next line and see which one is null while it needs to be not null. After you figure this out, fix the code: either make sure the member/variable is properly initialized to a non-null reference, or check it for null and, in case of null, do something else.Please see also:.Sometimes, you cannot do it under debugger, by one or another reason.

One really nasty case is when the problem is only manifested if software is built when debug information is not available. In this case, you have to use the harder way. First, you need to make sure that you never block propagation of exceptions by handling them silently (this is a crime of developers against themselves, yet very usual).

Object Reference Not Set To An Instance Of An Object Excel

The you need to catch absolutely all exceptions on the very top stack frame of each thread. You can do it if you handle the exceptions of the type System.Exception.

Object Reference Not Set To An Instance Of An Object Vb.net

In the handler, you need to log all the exception information, especially the System.Exception.StackTrace:,.The stack trace is just a string showing the full path of exception propagation from the throw statement to the handler. By reading it, you can always find ends. For logging, it's the best (in most cases) to use the class System.Diagnostics.EventLog:.Good luck,—SA. When answering a question please:.

Read the question carefully. Understand that English isn't everyone's first language so be lenient of badspelling and grammar. If a question is poorly phrased then either ask for clarification, ignore it, oredit the question and fix the problem. Insults are not welcome.

Object Reference Not Set To An Instance Of An Object Mysql

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.