Ensure event handlers are unhooked - Visual webpart

Hi ,
I have a visual webpart which has buttons and Images.
On click of these images and button an event handler is initiated to execute some function.
Now how and where should i dispose these event handlers.
I want the event handler to be hooked untill the user is viewing that webpart in that page.Once the user closes or moves to another page i want to unhook the event.
Where should i use the logic of unhooking event.
I have User control class which is loded in the webpart class.
Thanks in Advance.
Pallavi

Hi,
Once a Visual Web Part is inserted into a page, we will be able to use it after the page loaded, the buttons or other controls can be clicked at that time.
When we close the page, the Visual Web Part will also be gone, the controls in it will also be inaccessible, then the functions written in the click event of these controls will
also can be executed.
If this is not you really mean, more details about your requirement would be welcome.
Best regards,
Patrick
Patrick Liang
TechNet Community Support

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Event Handlers OIM 11g

Hi Folks ,
I am very new to OIM 11g , Could you please help me on below :
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OimWannaBe wrote:
Thanks i will go through the links .., just one more question :
In 11g , creating normal process task adapters /scheduled tasks , does it involve all the plugins stuff etc .., or they are like 10 g and plugins comes in to picture when we create event handlers .No, process task adapters are the same old way, just that you need to upload the jar into the db rather than copying them. Other than that everything else needs plugins atleast.
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Preeti.Edited by: Bikash Bagaria on Dec 29, 2011 10:39 PM

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Hi
I have developed the code for post process event handler using OIM 11 G API. The OIM not invoking the EventHandlers while updating the users attribute or creating the users attribute.
I have done the following task to develop and deploy the OIM 11g Event handlers. They are
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Sample Class
public class SamplePostProcessEventHandler implements PostProcessHandler {
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Sample File
<?xml version="1.0" encoding="UTF-8"?>
<oimplugins>
<plugins pluginpoint="oracle.iam.platform.kernel.spi.EventHandler">
<plugin pluginclass="test.eventhandlers.SamplePostProcessEventHandler" version="1.0" name="SamplePostProcessEventHandler">
</plugin>
</plugins>
</oimplugins>
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5) Creating the Zip file with the following directory structure.
plugin.xml
lib/SamplePostProcessEventHandler.jar
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ant -f pluginregistration.xml register
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<?xml version='1.0' encoding='UTF-8'?>
<eventhandlers>
<action-handler class="test.eventhandlers.SamplePostProcessEventHandler" entity-type="User" operation="CREATE" name="SamplePostProcessEventHandler" stage="postprocess" order="LAST" sync="TRUE"/>
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</eventhandlers>
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/home/oracle/eventhandler/db/EventHandlers.xml
weblogic.properties file parameters
wls_servername=oim_server1
application_name=oim
metadata_from_loc=/home/oracle/eventhandler
9) Finnally Running the PurgeCache.sh All
10) Restarted the OIM Server.
11) Testing
I have logged into the OIM Admin Console >> Search the User > Update the First Name. The event handlers are not invoked any create or update operation. I am not able to see the log entries into the log file.
My Log Entry Configuration.
log File Configuration :
/u01/app/wl-10.3.5.0/Oracle/Middleware/user_projects/domains/oim_domain/config/fmwconfig/servers/oim_server1/logging.xml
<log_handler name='test-handler' level='FINEST' class='oracle.core.ojdl.logging.ODLHandlerFactory'>
<property name='logreader:' value='off'/>
<property name='path' value='/u01/app/wl-10.3.5.0/Oracle/Middleware/user_projects/domains/oim_domain/servers/oim_server1/logs/test-event.log'/>
<property name='format' value='ODL-Text'/>
<property name='useThreadName' value='true'/>
<property name='locale' value='en'/>
<property name='maxFileSize' value='5242880'/>
<property name='maxLogSize' value='52428800'/>
<property name='encoding' value='UTF-8'/>
<logger name="TEST-LOGGER" level="FINEST" useParentHandlers="false">
<handler name="test-handler"/>
<handler name="console-handler"/>
</logger>
Is there anything is missing while deploying the event handlers.
Help is Greatly appreciated.

Change as per the following :
1. Put the event hander in the /home/oracle/eventhandler /metadata/metadata directory and
2. Change the following in the weblogic properties
application_name=OIMMetadata
metadata_from_loc to =/home/oracle/eventhandler/metadata
This will work.

Event handlers in a template file in uix

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I would probably remove the destination field and let the java program called by the event decide the destination.
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Thanks, Steve

Sorry, Steve, but event handlers are not supported in templates.
- Ryan

Sharepoint 2010 Custom Visual Webpart button click event firing on page refresh

I have developed a Visual Webpart to create a list in SP using vs2010 and the button click event I have written the list create method. If I click the button list is created successfully. And I refresh the page again list is creating(Again button
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protected void Button1_Click(object sender,
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SPView viewname = list.Views["All Items"];
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Label4.Text =
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TextBox1.Text =
string.Empty;
// Label4.Text = string.Empty;

Hi,
This is because the request is sent to the server when you refresh the page.
A workaround for this is that we can “provide a refresh link that redirects to the same page (or if you have some action causing the refresh programmatically, you could just
redirect to the page after that, with Response.Redirect)
so that page is requested by the browser (with GET method, default with hyperlinks)”.
More information:
http://social.msdn.microsoft.com/Forums/sharepoint/en-US/45648b39-1229-405c-ac9e-60eb82905982/click-event-getting-fired-on-page-refresh
Or we can use the Session to save a value which used as a flag for us to check whether it is a page refresh and perform accordingly.
http://www.codeproject.com/Articles/28099/Refresh-Page-Issue-in-ASP-Net
http://www.codeproject.com/Articles/10240/Detecting-Page-Refresh
Thanks
Patrick Liang
TechNet Community Support

How to change the default text "There are no items to show in this view" in the visual webpart

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http://www.idubbs.com/blog/2015/jslink-csr-to-override-there-are-no-items-to-show-in-this-view/ .
But as said, since you're doing a visual web part, keep your stuff in the visual web part and check for the count of items before adding the rendered data to your div.
Mohamed Derhalli
SharePoint Consultant
Blog: SharePoint Thoughts
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How to send asynchronous updates to Visual Webpart?

Hi Guys,
I have a visual webpart which does set of tasks on a single button is click event. So at the end of each task I need to update the status of that task back to the UI. How to do this?
Thanks in advance.
nasayoo

Hi nasayoo,
I suggest you can use asynchronous web part to achieve this.
Here are some demos for your reference:
More information about Asynchronous web part:
http://blogs.msdn.com/b/pavankumar/archive/2009/02/16/code-sample-for-a-asynchronous-webpart.aspx
http://sadomovalex.blogspot.com/2012/07/create-asynchronous-web-parts-for.html
Best regards,
Zhengyu Guo
Forum Support
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you
have feedback for TechNet Subscriber Support, contact [email protected]
Zhengyu Guo
TechNet Community Support

Do I need to worry about these event handlers in a grid from a memory leak perspective?

I'm pretty new to Flex and coudn't figure out how to add event handlers to inline item renderer components from the containing file script so I attached the listnerers simply as part of the components themselves (eg <mx:Checkbox ... chnage="outerDocument.doSomething(event)"../>):
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This grid is part of a view that will get destroyed and recreated potentially many times during a user's session within the application (there's a large dynamic nature to the app and views are created at run-time.) By destroyed I mean that the view that holds the above datagrid will no longer be referenced under certain circumstances and an entire new view object is created (meaning the old datagrid is no longer refernced and a new one is created.)
I heard you should clean up event handlers when they are no longer used, and I know at what point the view is destroyed, but I don't know how to clean up the event handlers added to the item renderer components? Is it something that the Flex garbage collector will handle efficiently?
Also, on a somewhat related note, how could I push the item renderer to an external component since in my event handlers for the item renderer buttons I need a reference to the datagrid.selectedIndex which, as an external item renderer I wouldn't have access to this containing grid?

No. You don't need explicit cleanup in this case: if your outerDocument is going away, you have nothing to worry about. The event handler leak can happen in sort of the reverse situation: suppose you have a long-lived MyView that contains a custom DataGrid like the one below. Now suppose that MyView frequently destroys and re-creates the grid. And suppose that on its creationComplete event, the grid registers a listener for outerDocument's (MyView's) enterFrame Event. Unless you explicitly remove this listener, MyView will still have a reference to it even after the grid that registered the listener is destroyed (and garbage collected).
This is a pretty contrived example, but it sort of illustrates the potential for leaks: a certain component is elligible for garbage collection, but some longer-lived component holds a reference to it (or part of it, such as a listener function). If the longer-lived component is elligible for GC as well, you don't really need to worry about proper cleanup. That's what you're paying the GC processor cycles for.

SharePoint DatePicker is not working in Visual webpart

Hi,
The sharepoint date picker is not working for Visual webparts created in VS 2012 (SP 2013).
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<script type="text/javascript" src="/_layouts/15/datepicker.js"></script>
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Error: The name InitializeControl does not exist in the current context.
I have checked this:
http://developmentsimplyput.blogspot.in/2013/04/sharepoint-datetimecontrol-issue-when.html
http://sharepoint.stackexchange.com/questions/57092/sharepointdatetimecontrol-crashes-in-sp2013-webpart
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Thanks

hi
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How to expose and code the event handlers of a base class?

I have created a class that inherits NumericUpDown. When I instantiate an object from that class, I can make it visible and have it appear on my form just like any other NUD. How can I get that instantiated object to expose the event handlers of its base
class, the NUD in this case, so that, for example, I can tell the client what action to take when the value of the instantiated object changes?
Thanks for your help.

I am not sure exactly what you mean. Are you adding your NUD controls to the Form at design time from the toolbox or adding them in code at run time? If you are adding them to the form from the toolbox then you access the events the same way
you would a standart NUD control. If it is at runtime and you have a fixed amount of them you are going to add then you can declare them Class Scoped using the
WithEvents keyword which will let you access all their events.
Public Class Form1
Private WithEvents Nud1 As New NUD
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Say I have an InDesign document with a text frame that is linked to an InCopy story. Can I use an "afterImport" event listener on the text frame to perform some action any time the link to the InCopy story gets updated? And will the event handler have access to both the story that is imported, and the pathname of the InCopy file?
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Thank you, Kasyan.
Both of those are good solutions.
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Richard

Help with Event Handlers with Scope

I have a question of how I must implement the event handlers with scope, I have problems in the execution of processes BPEL (they are generating exceptions in the dehydration)
I have two models for event handlers and I need to know which is the best way to implement event handlers.
Another question is, in what it influences the "variableAccessSerializable" attribute.
Thanks!
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<sequence name="Sequence_1">
</sequence>
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2) Event Handler with PartnerLink invocation INSIDE scope
<scope name="Scope_1" variableAccessSerializable="yes">
<eventHandlers>
<onMessage partnerLink="PartnerLink1"/>
<onAlarm/>
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<invoke name="Invoke_1" partnerLink="PartnerLink1"/>
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</scope>

Thanks -- indeed a crucial call might be missing. I was doing
this until 3 yesterday morning.
Would this be the correct sample code to use? :
http://livedocs.macromedia.com/flash/mx2004/main_7_2/wwhelp/wwhimpl/common/html/wwhelp.htm ?context=Flash_MX_2004&file=00000846.html
It seems to work (although someone cautions in the page
comments that it doesn't).
Part of my trouble in working with AS 2.0 is that I feel I
shouldn't have to do such complicated things (Delegate classes,
etc) in order to get simple things done (loading XML files). This
is not a complaint per se -- rather I feel that I must be missing
something, that it is my inexperience that is causing me to bend
through so many hoops: programming "should" be elegant and simple.
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ASP Gridviews in Sharepoint Visual WebPart

Hi all,
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Hi Vivek,
I am using that code logic previously, when I am opening very first time it is showing "No Results found" text but in my Case there is a drop down list in footer that needs to the data from server so "autopost back"
property is true for drop down list
While I am changing drop down the grid view automatically adding an empty row without showing any text and also it is showing edit and delete button.
Please Help me.
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Problems with .chart-plot-background and event handlers

Hello. I'm trying to add event handlers to my chart so that the user can be allowed click within the chart itself to perform certain actions like dragging, zooming, etc. To avoid having to deal with handling mouse clicks that lie outside the chart itself (for example on the axes), I've found that:
.chart-plot-background
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To me, this feels like an oversight in how the regions of the chart are defined. Why can I not get a listener to work on the whole chart and nothing else? Currently the only workaround seems to be to take the Region:
.chart-content
instead, and compute the difference between this region and the .chart-plot-background in order to manually suppress mouse clicks that lie outside .chart-plot-background.
Anyone have suggestions? Is this worth issuing on the JavaFX Jira?

Hello,
I'm not an expert on controls, but here is my guess based on your description: when you register an event handler on a "background" node, it is called only when the mouse hovers over the background node - I suppose the light gray is the background with the light gray cells being transparent and dark grey cells being filled. So the behavior seems correct - you can't expect the events to be delivered to background when it is covered by other nodes. I think you really should register the handler on the entire chart and filter out the events you don't want to handle. This however should not require much of computing the difference between the regions, it should be possible to do just something like
if (!background.contains(event.getX(), event.getY())) {
return;
Provided that the background doesn't reach under the axes as well. Note that if there are any different transforms between the background and the node with the handler registered on it, you may need to recompute the coordinates by
background.sceneToLocal(event.getSceneX(), event.getSceneY());
And use the contains method on that.

Multiple event handlers registered for the same event and error when adding users to sec groups

Project Server 2013 CU April (May) 2014
I've created and installed two event handlers (separate dll:s) and both are triggering on Project Published - initially, both are working fine.
After an IISReset, trying to create a new security group (or add a user to an existing group) will result in an error on the page and a corresponding error in the ULS log - the latter indicating an error in the method security.creategroups, and specifically
a problem 'An item with the same key has already been added.'
An SQL trace reveals a break in execution after executing the proc 'pub.MSP_ADMIN_ReadEventReceivers' which returns all registered event handlers.
In my case, the result of that proc execution shows that there are two event handlers registered with an EVENT_ID of 53 (Project Published) and with ORDER_FIRED set to 1 and 2 respectively.
I tried removing one of the event receivers using the Central Admin PWA interface and then everything worked just fine - I added the event receiver back again, and everything STILL worked! IISReset and I got the error back again. :-(
Since there's obviously some problem with reading multiple entries from that table regardless of the ORDER_FIRED differentiation, I tried temporarily modifying one of the '53' entries in the table directly and then the sec group was created just fine!
I would like to know if anyone else has seen this? I've seen this on three separate installations now after deploying a second event listener onto those systems.
/Lars Hammarberg
//Lars Hammarberg www.connecta.se

Hi Lars,
yes I have seen the same issue. It is not related to April CU. I had the error before with SP1.
It is not only an issue with the security groups. At least in our case nothing worked at all. No custom field editing, all Queue Jobs failing.
For your case I suggest you consolidate your code in one eventhandler.
Theory says that you can have more than 1 (up to 999) eventhandlers for one Event (http://msdn.microsoft.com/en-us/library/ms481079(v=office.12).aspx) but that seems not to
work. Not sure, if it worked in earlier versions.
Kind regards
Christoph
Christoph Muelder | Senior Consultant, MCTS, MCSE, MCT | SOLVIN information management GmbH, Germany

Ensure event handlers are unhooked - Visual webpart

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