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Postback not firing on multi select

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Hans Roelants
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Hans Roelants asked on 13 Jul 2010, 12:28 PM
Hello,

I have a treeview with multipleselect = true and an event attached to the the NodeClick event. This gets fired when a user clicks a node but it doesn't when the user clicks for the second time using CTRL or SHIFT. How can I activate this 'autopostback' on multi-click events?

Many thx for your help

Hans

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Nikolay Tsenkov
Telerik team
answered on 15 Jul 2010, 02:04 PM
Hi Hans Roelants,

Could you, please be bit more specific about what exactly is the scenario you need to implement?


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Nikolay Tsenkov
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Hans Roelants
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answered on 20 Jul 2010, 04:43 PM

 

 

 

function OnClientNodeChecked(sender, eventArgs) {
           var node = eventArgs.get_node();
           // check parents
           if (node.get_checked()) {
               while (node.get_parent().set_checked != null) {
                   node.get_parent().check();
                   __doPostBack(???, ???); 
                   node = node.get_parent();
               }
           }


I changed my logic a bit to avoid the Multiselect and now I'm using checkboxes in the treeview.
I use the server-side NodeCheck event to call a webservice, which works fine.

I also wanted to implement logic that when you select a child-node, the parent nodes also get checked.
I found a nice code snippet on the forum that achieves this, however it seems that the .check() event does not cause a postback. I wanted to use the __doPostBack function here but can you tell me wich arguments I should use?

Many thx for your help

 

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Nikolay Tsenkov
Telerik team
answered on 23 Jul 2010, 03:29 PM
Hello Hans Roelants,

Well, we have NodeCheck event, firing server-side, which should work just as fine for you.
Triggering postback manually isn't something that we encourage our clients to do.
Also if you are going to perform some actions on the server, then probably you can move the parent checking there, too?

If you still want to check the parent on the client and then to do something separately on the server, then handle the ClientNodeChecking event (check the parent there) and it will happen before the post back for handling NodeCheck on the server.

Hope this is going to help you!


Regards,
Nikolay Tsenkov
the Telerik team
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Nikolay Tsenkov
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Hans Roelants
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