Object reference not set

[Guest]

I have a real stumper. I added a server side table to a home page that has
two other server side tables on it that have been working great. In Visual
Studio everything works great. When I put the page on the production server,
the first time in the page works great. If I navigate to any other page on
the site and then try to return to the home page the control I added throws
the following:

Server Error in '/' Application.
--------------------------------------------------------------------------------

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:

An unhandled exception was generated during the execution of the current web
request. Information regarding the origin and location of the exception can
be identified using the exception stack trace below.

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an
object.]
MAFE.home.LoadBWOM()
MAFE.home.Page_Load(Object sender, EventArgs e)
System.Web.UI.Control.OnLoad(EventArgs e) +67
System.Web.UI.Control.LoadRecursive() +35
System.Web.UI.Page.ProcessRequestMain() +761

If I comment out the line of code where I store a row in the new table, all
works just fine. Anyone have any ideas?

 

[Karl Seguin [MVP]]

can you show us the line of code that you comment out to make it work, and
all relevant lines of code? Clearly something's null. It's easy to debug if
you step through it and add a breakpoint on that line...

Karl

 

[Bob Barrows [MVP]]

Charlie, you may wish to read the reply I made to your original post - I
crossposted it to this group so it still has the original subject: "Re:
ASP.NET Problem with return to home page".
The conversation about this topic should, of course, continue in this
thread. I just wanted to draw your attention to what I said.

Bob Barrows

 

[Guest]

Here is the line of code:

tdBWOM.InnerHtml = sb1.ToString();

In an attempt to isolate what is happening, I changed the html file to use a
html table instead of an asp:Table. I get the same result.

I cannot get this to fail on my test system, only on the production server.
When the page first displays, the text I put in the cell displays perfectly.
There is no error. Only when I navigate to another page on the site and then
navigate back to this page do I get the error. If you want to see the aspx
page after it is generated, go to www.mafe.org. It is the home page for the
site (default.aspx) that I am having the problem with. I currently have the
line of code above commented out in the code behind file.
--
Charlie Jursch
Patotech Software, Inc.
Danville, CA

can you show us the line of code that you comment out to make it work, and
all relevant lines of code? Clearly something's null. It's easy to debug if
you step through it and add a breakpoint on that line...

Karl

--
http://www.openmymind.net/
http://www.fuelindustries.com/

I have a real stumper. I added a server side table to a home page that has
two other server side tables on it that have been working great. In
Visual
Studio everything works great. When I put the page on the production
server,
the first time in the page works great. If I navigate to any other page
on
the site and then try to return to the home page the control I added
throws
the following:

Server Error in '/' Application.
--------------------------------------------------------------------------------

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:

An unhandled exception was generated during the execution of the current
web
request. Information regarding the origin and location of the exception
can
be identified using the exception stack trace below.

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an
object.]
MAFE.home.LoadBWOM()
MAFE.home.Page_Load(Object sender, EventArgs e)
System.Web.UI.Control.OnLoad(EventArgs e) +67
System.Web.UI.Control.LoadRecursive() +35
System.Web.UI.Page.ProcessRequestMain() +761

If I comment out the line of code where I store a row in the new table,
all
works just fine. Anyone have any ideas?

 

[Guest]

Bob,

Thanks for your input. I have updated the web.config accordingly.

 

[Bob Barrows [MVP]]

You still have not shown enough code to enable us to see what's happening.
All I can say is that you should determine which object it is complaining
about: tdBWOM or sb1. Insert some code to verify that both of these
variables are set to the appropriate objects.
You should do this before posting more code.

Bob Barrows

Here is the line of code:

tdBWOM.InnerHtml = sb1.ToString();

In an attempt to isolate what is happening, I changed the html file
to use a html table instead of an asp:Table. I get the same result.

I cannot get this to fail on my test system, only on the production
server. When the page first displays, the text I put in the cell
displays perfectly. There is no error. Only when I navigate to
another page on the site and then navigate back to this page do I get
the error. If you want to see the aspx page after it is generated,
go to www.mafe.org. It is the home page for the site (default.aspx)
that I am having the problem with. I currently have the line of code
above commented out in the code behind file. --
Charlie Jursch
Patotech Software, Inc.
Danville, CA

can you show us the line of code that you comment out to make it
work, and all relevant lines of code? Clearly something's null.
It's easy to debug if you step through it and add a breakpoint on
that line...

Karl

--
http://www.openmymind.net/
http://www.fuelindustries.com/

I have a real stumper. I added a server side table to a home page
that has two other server side tables on it that have been working
great. In Visual
Studio everything works great. When I put the page on the
production server,
the first time in the page works great. If I navigate to any other
page on
the site and then try to return to the home page the control I added
throws
the following:

Server Error in '/' Application.
------------------------------------------------------------------------ --------

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:

An unhandled exception was generated during the execution of the
current web
request. Information regarding the origin and location of the
exception can
be identified using the exception stack trace below.

Stack Trace:


[NullReferenceException: Object reference not set to an instance of
an object.]
MAFE.home.LoadBWOM()
MAFE.home.Page_Load(Object sender, EventArgs e)
System.Web.UI.Control.OnLoad(EventArgs e) +67
System.Web.UI.Control.LoadRecursive() +35
System.Web.UI.Page.ProcessRequestMain() +761

If I comment out the line of code where I store a row in the new
table, all
works just fine. Anyone have any ideas?

 

[Karl Seguin [MVP]]

agreed.

If that's the line, it's clear that either sb is null or tdBWOM is null.

Karl

--
http://www.openmymind.net/
http://www.fuelindustries.com/

You still have not shown enough code to enable us to see what's happening.
All I can say is that you should determine which object it is complaining
about: tdBWOM or sb1. Insert some code to verify that both of these
variables are set to the appropriate objects.
You should do this before posting more code.

Bob Barrows

Here is the line of code:

tdBWOM.InnerHtml = sb1.ToString();

In an attempt to isolate what is happening, I changed the html file
to use a html table instead of an asp:Table. I get the same result.

I cannot get this to fail on my test system, only on the production
server. When the page first displays, the text I put in the cell
displays perfectly. There is no error. Only when I navigate to
another page on the site and then navigate back to this page do I get
the error. If you want to see the aspx page after it is generated,
go to www.mafe.org. It is the home page for the site (default.aspx)
that I am having the problem with. I currently have the line of code
above commented out in the code behind file. --
Charlie Jursch
Patotech Software, Inc.
Danville, CA

can you show us the line of code that you comment out to make it
work, and all relevant lines of code? Clearly something's null.
It's easy to debug if you step through it and add a breakpoint on
that line...

Karl

--
http://www.openmymind.net/
http://www.fuelindustries.com/


I have a real stumper. I added a server side table to a home page
that has two other server side tables on it that have been working
great. In Visual
Studio everything works great. When I put the page on the
production server,
the first time in the page works great. If I navigate to any other
page on
the site and then try to return to the home page the control I added
throws
the following:

Server Error in '/' Application.
------------------------------------------------------------------------ --------

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:

An unhandled exception was generated during the execution of the
current web
request. Information regarding the origin and location of the
exception can
be identified using the exception stack trace below.

Stack Trace:


[NullReferenceException: Object reference not set to an instance of
an object.]
MAFE.home.LoadBWOM()
MAFE.home.Page_Load(Object sender, EventArgs e)
System.Web.UI.Control.OnLoad(EventArgs e) +67
System.Web.UI.Control.LoadRecursive() +35
System.Web.UI.Page.ProcessRequestMain() +761

If I comment out the line of code where I store a row in the new
table, all
works just fine. Anyone have any ideas?

--
Microsoft MVP -- ASP/ASP.NET
Please reply to the newsgroup. The email account listed in my From
header is my spam trap, so I don't check it very often. You will get a
quicker response by posting to the newsgroup.

 

[Bob Barrows [MVP]]

.... which leaves unanswered the question of why one of them is null, which
can best be answered by stepping through the code (not recommended in a
production environment, but a duplicate app could be created for testing, I
suppose). If stepping is not an option, then you have to manually backtrace
the lines of code leading up to this line and see if you can identify the
failure to instantiate the object.

agreed.

If that's the line, it's clear that either sb is null or tdBWOM is
null.

Karl

--
http://www.openmymind.net/
http://www.fuelindustries.com/

You still have not shown enough code to enable us to see what's
happening. All I can say is that you should determine which object
it is complaining about: tdBWOM or sb1. Insert some code to verify
that both of these variables are set to the appropriate objects.
You should do this before posting more code.

Bob Barrows

Here is the line of code:

tdBWOM.InnerHtml = sb1.ToString();

In an attempt to isolate what is happening, I changed the html file
to use a html table instead of an asp:Table. I get the same result.

I cannot get this to fail on my test system, only on the production
server. When the page first displays, the text I put in the cell
displays perfectly. There is no error. Only when I navigate to
another page on the site and then navigate back to this page do I
get the error. If you want to see the aspx page after it is
generated, go to www.mafe.org. It is the home page for the site
(default.aspx) that I am having the problem with. I currently have
the line of code above commented out in the code behind file. --
Charlie Jursch
Patotech Software, Inc.
Danville, CA


:

can you show us the line of code that you comment out to make it
work, and all relevant lines of code? Clearly something's null.
It's easy to debug if you step through it and add a breakpoint on
that line...

Karl

--
http://www.openmymind.net/
http://www.fuelindustries.com/


I have a real stumper. I added a server side table to a home page
that has two other server side tables on it that have been working
great. In Visual
Studio everything works great. When I put the page on the
production server,
the first time in the page works great. If I navigate to any
other page on
the site and then try to return to the home page the control I
added throws
the following:

Server Error in '/' Application.
---------------------------------------------------------------------- --
--------

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:

An unhandled exception was generated during the execution of the
current web
request. Information regarding the origin and location of the
exception can
be identified using the exception stack trace below.

Stack Trace:


[NullReferenceException: Object reference not set to an instance
of an object.]
MAFE.home.LoadBWOM()
MAFE.home.Page_Load(Object sender, EventArgs e)
System.Web.UI.Control.OnLoad(EventArgs e) +67
System.Web.UI.Control.LoadRecursive() +35
System.Web.UI.Page.ProcessRequestMain() +761

If I comment out the line of code where I store a row in the new
table, all
works just fine. Anyone have any ideas?

--
Microsoft MVP -- ASP/ASP.NET
Please reply to the newsgroup. The email account listed in my From
header is my spam trap, so I don't check it very often. You will get
a quicker response by posting to the newsgroup.

 

[Guest]

I resolved this issue by upgrading the application to APS.NET 2.0. This all
started to happen right after I had installed 2.0 on the servers. I cannot
explain why it was happening, only that after I converted the application to
2.0 everything started to work normally.

Thanks for your assistance.