Object reference not set to an instance of an object.?

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SQL-Server-2005

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hi am getting error in this line..can anyone tell me wat type of error that i can solve this..?am using dynamic in my project.

C#

protected void Page_Init(object sender, EventArgs e)
    {
      objDyn.GenerateTabControls("FM_FactoryMaster", out dynDiv, out gListDynamicControls, true, false, false);

}

thanks

Posted 14-May-12 22:59pm

ythisbug

Updated 15-May-12 0:49am

Wes Aday

v3

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sjelen 15-May-12 12:37pm

objDyn is probably null. What is it? A control? Some custom class? Where do you initialize it?

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Maciej Los · Answer 1 · 2012-05-14T23:02:00

Solution 1

Take a look here[^]

Posted 14-May-12 23:02pm

Maciej Los

Comments

VJ Reddy 16-May-12 10:43am

Useful reference for common questions. 5!

Maciej Los 16-May-12 10:56am

Thank you, VJ ;)

Sandeep Mewara · Answer 2 · 2012-05-14T23:17:00

Solution 2

This error happens when you try to use a property or call a method of an object that is null. More details: here[^]

A simple use of Visual studio DEBUGGER can tell you the object because of which it is happening. Just look at the stack trace and put a debugger on that line. Check the objects of that line and see if any one is null and you are trying to use that objects property. Handle the same.

Above, looks like objDyn is NULL ~~or one of the parameters passed~~ assuming error is not raised in GenerateTabControls method.

Posted 14-May-12 23:17pm

Sandeep Mewara

Updated 15-May-12 5:35am

v3

Comments

ythisbug 15-May-12 5:29am

gListDynamicControls this value is showing 0..

ythisbug 15-May-12 5:31am

and in objDyna dt=null and dr also null..wat it means.so wat changes have to do??u have any idea..

Sandeep Mewara 15-May-12 11:50am

What do you mean by 'coming null', have not these implemented/defined/written by you?

As Bernhard said, out params can be null. Step through and check the line where it bombs. Use F11.

Technoses 15-May-12 12:08pm

write it on page_load event

ythisbug 15-May-12 5:38am

hi sandeep
dynDiv is coming null.i put breakpoint and checkd..

Bernhard Hiller 15-May-12 8:48am

C'mon, those are the OUT parameters - they can be null when you call the function. In case you get the error really exactly in the line shown, objDyn is null. Where is that instatiated?
But I am not sure if you have checked that the error was not raised in GenerateTabControls function...

Sandeep Mewara 15-May-12 11:33am

Thanks for correcting me. Yes, only objDyn looks potential culprit. (Assuming error is not raised in the method!)

Technoses · Answer 3 · 2012-05-15T06:08:00

Solution 3

write this code on page_load in place page_init

Posted 15-May-12 6:08am

Technoses