Check of URL Parameters are set

Question

I was wondering if people knew how to check if a URL parameter is set?

For instance, I have an application that may or may not have a query attached to the URL. Something like this:

...salesforce.com/apex/project?id=##################

I understand to grab that ID in Apex it would look something like:

public String id = apexpages.currentpage().getparameters().get('id');

What I want to do is check if that's been set.

In PHP, I know you can check for things like this:

<?php
  if (isset($_GET['id'])) {
    // Do something...
  }
?>

I'm just looking for the Apex equivilant.

Hope I've been clear enough,

Thanks!

Davin Casey · Accepted Answer · 2015-07-23 08:30:17Z

4

If I understand your question correctly it should simply be a case of:

    public String idParam = apexpages.currentpage().getparameters().get('id');

    if (idParam != null) {
      doSomething();
    }

You could also go a step further and check that it is an actual Id, not some other value such as a string:

if (idParam != null && idParam instanceOf Id)

I think Id is a reserved keyword in Apex so I've changed your param to 'idParam'.

answered Jul 22, 2015 at 11:37

Davin Casey

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Sergej Utko · Accepted Answer · 2015-07-22 11:42:11Z

1

I am checking it this way:

Example:

if(ApexPages.currentPage().getParameters().containsKey('param1') && ApexPages.currentPage().getParameters().get('param1') != '')
{
....
}

answered Jul 22, 2015 at 11:42

Sergej Utko

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2 Answers 2