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   Home » .NET 5.0 » Error : Object reference not set to an instance of an object.
       
Author Reply
Jagadeesh Velusamy
posted 2 posts
since Jul 01, 2010 
from

Error : Object reference not set to an instance of an object.

  Posted on: 27 Aug 2010       
Hi friends ,

          I got this error. This application is deleting multiple data using check box in grid view?.... 


Error :

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 164:            if (chkdelete != null)
Line 165:            {
Line 166:                chkall.Checked = array.Contains(grideviewsasmple.DataKeys[i].Value);
Line 167:
Line 168:                if (!chkdelete.Checked)

Source File: c:\Inetpub\wwwroot\AdditionUpdate\Default.aspx.cs    Line: 166

Shankey
posted  178 posts
since  Aug 05, 2010 
from 

 Re: Error : Object reference not set to an instance of an object.
  Posted on: 27 Aug 2010        0  
Hi jagadeesh,

I think this is your javascript error and check whether you are able to get you check box through javascript. like this document.getElementById('chkbox.ClientID')
If this post helped you, then tick the checkbox above "Do you like this Answer"
Shakey Shankey
Suthish Nair
posted  4906 posts
since  Jul 09, 2009 
from  India

 Re: Error : Object reference not set to an instance of an object.
  Posted on: 27 Aug 2010        0  

put a breakpoint on this line
array.Contains(grideviewsasmple.DataKeys[i].Value);
and check the values its getting..
 
Please Mark as Answer, if your post solved !
Sam Hobbs
posted  6490 posts
since  Sep 07, 2009 
from  Los Angeles, California, USA

 Re: Error : Object reference not set to an instance of an object.
  Posted on: 28 Aug 2010        0  
Do as Suthish Nair says. It is what you should do to diagnose problems such as this. To solve the problem, you could put code in your program to check if grideviewsasmple.DataKeys[i] is null. I think it will be null for the last row, which is the rows for new records. I think you can use the NewIndex (I am not sure what it is called) property to determine if a row is the row for a new row.
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