I have an object that may or may not exist on a page.  Therefore, I test for 
it.  But it doesn't seem to work if I do the following:

   if not HomeLink is nothing then 
HomeLink.NavigateUrl="http://www.staffingworkshop.com/"

I get the error message:
********************************************************************
Compilation Error
Description: An error occurred during the compilation of a resource required 
to service this request. Please review the following specific error details 
and modify your source code appropriately.

Compiler Error Message: BC30451: Name 'HomeLink' is not declared.

Source Error:

Line 40:  if not isPostBack then
Line 41:   if Session("SiteSourceCompany") is nothing then
Line 42:    if not HomeLink is nothing then 
HomeLink.NavigateUrl="http://www.stw.com/"  <-- error
Line 43:   end if
Line 44:   Dim OldStart = Session("start")      'Keep this as the clear will 
dump it
 ***********************************************************************

How do I test to see if an object exists or not?

Thanks,

Tom

What you probably want to do is to use FindControl to see if it exists or 
not, that will prevent the compile error. In this context 'this' is the 
current page.

HyperLink hl = this.FindControl("HomeLink");
if (hl != null) {
    hl.NavigateUrl="http://www.staffingworkshop.com/"
}

John
Nice Clean Examples
www.nicecleanexample.com

"tshad"  wrote in message 
news:erWS%23vR2HHA.5740@TK2MSFTNGP04.phx.gbl...


>I have an object that may or may not exist on a page.  Therefore, I test 
>for it.  But it doesn't seem to work if I do the following:
>
>   if not HomeLink is nothing then 
> HomeLink.NavigateUrl="http://www.staffingworkshop.com/"
>
> I get the error message:
> ********************************************************************
> Compilation Error
> Description: An error occurred during the compilation of a resource 
> required to service this request. Please review the following specific 
> error details and modify your source code appropriately.
>
> Compiler Error Message: BC30451: Name 'HomeLink' is not declared.
>
> Source Error:
>
> Line 40:  if not isPostBack then
> Line 41:   if Session("SiteSourceCompany") is nothing then
> Line 42:    if not HomeLink is nothing then 
> HomeLink.NavigateUrl="http://www.stw.com/"  <-- error
> Line 43:   end if
> Line 44:   Dim OldStart = Session("start")      'Keep this as the clear 
> will dump it
> ***********************************************************************
>
> How do I test to see if an object exists or not?
>
> Thanks,
>
> Tom
>
> 

On Aug 7, 12:54 pm, "tshad"  wrote:

> I have an object that may or may not exist on a page.  Therefore, I test for
> it.  But it doesn't seem to work if I do the following:
>
>    if not HomeLink is nothing then
> HomeLink.NavigateUrl="http://www.staffingworkshop.com/"
>
> I get the error message:
> ********************************************************************
> Compilation Error
> Description: An error occurred during the compilation of a resource required
> to service this request. Please review the following specific error details
> and modify your source code appropriately.
>
> Compiler Error Message: BC30451: Name 'HomeLink' is not declared.
>
> Source Error:
>
> Line 40:  if not isPostBack then
> Line 41:   if Session("SiteSourceCompany") is nothing then
> Line 42:    if not HomeLink is nothing then
> HomeLink.NavigateUrl="http://www.stw.com/"  <-- error
> Line 43:   end if
> Line 44:   Dim OldStart = Session("start")      'Keep this as the clear will
> dump it
>  ***********************************************************************
>
> How do I test to see if an object exists or not?
>
> Thanks,
>
> Tom


That should work, but you must declare HomeLink, which is why the
compiler is complaining. Once you have it declared in your code, you
can check if it exists or not.