199 Lotus blogs updated hourly. Who will post next? Home | Blogs | Search | About 
 
Latest 7 Posts
XPages Tip: Adding a Bootstrap Class to All Labels via the Theme (Redux)
Wed, Jul 20th 2016 10
XPages Tip: Overriding, Concatenating, and Conditionally Adding Control Properties via a Theme
Wed, Jul 20th 2016 6
XPages Tip: Displaying Bootstrap Applications Properly on Mobile Devices
Tue, May 31st 2016 8
Efficiently Keeping an XPages Session Alive with JSON RPC
Wed, May 25th 2016 4
Browser Session Lifespan – Idle Session Timeout vs LTPA Token Expiration
Tue, May 24th 2016 5
XPages Tip: Passing an Array to a Custom Control Property
Tue, Apr 12th 2016 3
XPages Tip: Beware Server-Side code in Multiple onClientLoad Events
Thu, Apr 7th 2016 5
Top 10
XPages Tip: Adding a Bootstrap Class to All Labels via the Theme (Redux)
Wed, Jul 20th 2016 10
Dojo in XPages – 26: Combining Badge with LightboxNano
Wed, May 21st 2014 8
Gridx in XPages – 15: Adding QuickFilter for Full-Text Searching
Tue, Dec 9th 2014 8
XPages Tip: Displaying Bootstrap Applications Properly on Mobile Devices
Tue, May 31st 2016 8
Dojo in XPages – 7: Selecting DOM Elements with dojo.query
Mon, Feb 24th 2014 7
Dojo in XPages – 14: Custom Animations
Tue, Mar 18th 2014 7
Dojo in XPages – 6: Selecting a DOM Element with dojo.byId()
Thu, Feb 20th 2014 6
Adding Event Handlers to Font Awesome Icons in XPages
Wed, Apr 9th 2014 6
Dojo in XPages – 22: Displaying an Image Gallery of Attachments
Thu, May 8th 2014 6
XPages Tip: Filtering a View Data Source with URL Parameters
Mon, Jul 7th 2014 6


Passing Parameters to SSJS from a Client-side partialRefreshGet()
Twitter Google+ Facebook LinkedIn Addthis Email Gmail Flipboard Reddit Tumblr WhatsApp StumbleUpon Yammer Evernote Delicious
Brad Balassaitis    

partialRefreshGet() is a handy method of the client-side XSP object that can be used to trigger a partial refresh from client-side JavaScript. In this post, I’ll show how you can pass parameters for SSJS to read during the refresh, which allows you to send information to the server-side code without submitting a less efficient POST request.

This is an interesting tip that I picked up from the Mastering XPages book. I’ve used partialRefreshGet() numerous times, but I wasn’t familiar with the params property previously.

Here’s an example of a normal partialRefreshGet() call:

XSP.partialRefreshGet("#{id:myComputedText}", {});

The first parameter is the target for the partial refresh. This is client-side JavaScript, so it needs to use the #{id: } syntax to compute the client-side ID of the refresh target.

The second parameter is an object that have up to 4 properties: onStart, onError, onComplete, and params. Here’s an example of the structure when using all of the options (although none are required):

XSP.partialRefreshGet("#{id:myComputedText}",
 {
    params: paramObject,
    onStart: startHandler,
    onError: errorHandler,
    onComplete: completeHandler

 });

The params Property and the param Object

The params property takes an object with parameters to send with the AJAX call. The Mastering XPages book says that the params property “gets expanded, encoded, and appended to the GET request URI that is invoked by the underlying AJAX handler.”

This gives you an easy way to pass information from client-side JS to SSJS and then access it via the param object in SSJS, which provides access to all URL parameters.

The SSJS that’s intended to read the parameters passed by a partialRefreshGet much be within the specified refresh target in order to read the parameters during the refresh.

Simple Example

If I have a computedText component with this value:

if (param.containsKey('parameter1')) {
  return param.parameter1 + ' ' + param.parameter2;
}

It will not return anything when the page first loads.

If I add a button with this client-side JavaScript…

XSP.partialRefreshGet("#{id:computedField2}", 
  {
    params:{"parameter1":"1", "parameter2":"2"}
  });

… it will display 12 after I click the button, because it is the refresh target and it can read URL parameters sent during the refresh.

This is a very efficient way to send data to a server-side script.

Note: If you pass a parameter that already exists in the URL, it does not overwrite the URL parameter value — it turns the value into a string separated by a comma and a space between the values.




---------------------
http://xcellerant.net/2014/07/14/passing-parameters-to-ssjs-from-a-client-side-partialrefreshget/
Jul 14, 2014
4 hits



Recent Blog Posts




Created and Maintained by Yancy Lent - About - Planet Lotus Blog - Advertising - Mobile Edition