Best way to check if a page exist?

Johan Sjödahl

Vote:

Hi,

I just wounder, which is the best way to verify that a page really exist?
I dont want to use try catch, and catch the pagenotfound exception.

PageReference pr = new PageReference(PageId);

try
{
PageData pd = DataFactory.Instance.GetPage(pr);
}
catch
{
throw...
}

#38268

Apr 07, 2010 8:55

Vote:

This should be a safe way:

PageData pd;

PageReference pr = new PageReference(PageId);

if(!PageReference.IsNullOrEmpty(pr))

pd = DataFactory.Instance.GetPage(pr);

if (pd != null)

{

// Your page exists and you have access to it

}

PageData pd;
PageReference pr = new PageReference(PageId);
if(!PageReference.IsNullOrEmpty(pr))
   pd = DataFactory.Instance.GetPage(pr);

if (pd != null)
{
   // Your page exists and you have access to it
}

#38272

Edited, Apr 07, 2010 9:19

Johan Sjödahl

Vote:

Hi,
Thank you for your respond,
I think that new PageReference create a new PageReference even if the page dosent exist.
And that mean PageReference.IsNullOrEmpty is not going to be NullOrEmpty becase the Reference exist but is not a valid page.

if(PageReference.IsNullOrEmpty(pr))
return;

try
{

                    // I GOT A PAGE NOTFOUND exception here.
                    PageData pd = DataFactory.Instance.GetPage(pr);
                    pageList.Add(pd);
                }
                catch
                {
                }

#38276

Apr 07, 2010 10:13

Johan Sellberg Sellberg

Vote:

There is one way to do it without the try catch, but I am not sure how supported it is.

you can use:

if(PageCoreData.Load(PageRef) != null)

{

//The pageRef is ok and exists.

}

PageCoreData.Load returns null if you have a page ref that leads to a page that does not exist instead of throwing an exception. I have not investigated it much though.. Like if it is slow /cached, ..., ... so might be some issues in some cases im sure.

#38278

Apr 07, 2010 10:43