Exception details: system.nullreferenceexception: object reference not set to an instance of an object.

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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.

What I have tried:

  {
Line 29: 
Line 30:             CDT = Cadapter.SELECT_SEARCH_COMPANY(Session["JOBCATE"].ToString(), Session["QUALI"].ToString(), Session["skill"].ToString());
Line 31:             Session["CID"] = CDT.Rows[0]["CID"].ToString();
Line 32:             if (CDT.Rows.Count == 0)

Posted 25-Jul-17 7:12am

sommr0

Updated 25-Jul-17 7:18am

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F-ES Sitecore 26-Jul-17 4:47am

This question is asked every day so google the error message because the answer and the advice never changes. We can't fix this for you, *you* have to check exactly what is null in your code and then decide the proper way to handle that null.

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Sheila Pontes · Answer 1 · 2017-07-25T07:18:00

Solution 1

Hi,

This error occurs when the datatable is not referenced.
In your code, the error occurred because the datatable CDT is null and you tried to read it.

C#

Session["CID"] = CDT.Rows[0]["CID"].ToString();

To fix this error.

C#

 CDT = Cadapter.SELECT_SEARCH_COMPANY(Session["JOBCATE"].ToString(),Session["QUALI"].ToString(), Session["skill"].ToString());
if(CDT != null)
{
   if(CDT.Rows.Count > 0)
   {
       Session["CID"] = CDT.Rows[0]["CID"].ToString();
   }
   else 
   {
       //your code
   }
}

Posted 25-Jul-17 7:18am

Sheila Pontes

Updated 25-Jul-17 7:47am

v2

Comments

sommr0 25-Jul-17 13:29pm

How to fixed it??
Sheila Pontes

Sheila Pontes 25-Jul-17 13:48pm

I added the above correction.

sommr0 25-Jul-17 13:55pm

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

Source Error:

Line 22: protected void Page_Load(object sender, EventArgs e)
Line 23: {
Line 24: CDT = Cadapter.SELECT_SEARCH_COMPANY(Session["JOBCATE"].ToString(), Session["QUALI"].ToString(), Session["skill"].ToString());
Line 25: if (CDT != null)
Line 26: {

sommr0 25-Jul-17 13:56pm

Same issue.. i paste your code..

sommr0 25-Jul-17 13:59pm

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

Source Error:

Line 28: {
Line 29:
Line 30: CDT = Cadapter.SELECT_SEARCH_COMPANY(Session["JOBCATE"].ToString(),Session["QUALI"].ToString(), Session["skill"].ToString());
Line 31: if (CDT != null)
Line 32: {

Sheila Pontes 25-Jul-17 15:13pm

If the error continues, the problem is with Cadapter or its SELECT_SEARCH_COMPANY.
Add a breakpoint on line 30 and debug the code.
Somewhere, there is a null object.