catch an event of node deletion

[Administrator]

Hi,
How can I know when a node was deleted?
i am using version 5.1.1.19.
When the node is deleted the following event is invoked :
private void EventSink_NodeCollectionChanged(CollectionExEventArgs e)

But,the value of e.ChangeType is not
CollectionExChangeType.Remove.
Istead ,it is : CollectionExChangeType.Clear.

[J.Nagarajan]

Hi Shimon ,

Sorry for the delay in getting back to you. When removing a node from the diagram model, it will fire NodeCollectionChanged event and the ChangeType of "Remove works fine in v5.1.1.39. Please refer to my test sample and the attached video clip.

Video: www2.syncfusion.com/Samples/Video_73721.zip

Sample: www2.syncfusion.com/Samples/GroupNodeSelection.zip

Is it possible for you to upload us a minimal sample or modify the attached sample to reproduce the issue here? This will help us to analyse the issue further.

Thanks for using Syncfusion product.

Regards,
Nagaraj

[Administrator]

Hi,
Thanks for your reply,but the links which you inserted were brokenlinks.
In addition.You wrote that "ChangeType of 'Remove' works fine in v5.1.1.39" ,
but i use v5.1.1.19.
I solved this problem by using the event of Diagram.Model.EventSink.NodeCollectionChanging
instead.

I have another question :
I use the Symbol Designer v5.2.0.0 to create a pallet.I added an image symbol,and set the Tag property in the "Properties" area.I then saved the pallet(to edp file),but when i loaded the edp file,i saw that the Tag property was not saved.

Thanks,

Shimon.

[J.Nagarajan]

Hi Shimon ,

Tag field is NotSerialized property. We can use tag property for one session and we cannot save it in file (It is done for security reasons).Because you can insert in tag some custom type and in future you would not be able to deserialize it without custom type definition.

Please let me know if you have any questions.

Regards,
Nagaraj

[Administrator]

Hi Nagaraj,

So - what is the 'tag' built\used for?
How can we pass a value (specific for each symbol) when creating new instance on the diagram?

Thanks,
-Bracha

[J.Nagarajan]

Hi Bracha ,

Sorry for the inconvenience caused. We have already requested our developers to implement the serializing functionality for the nodes. This feature has been implemented in our latest source and this is available in v6.3.0.6 and the later releases. We would recommend you to download our latest version from the following page.

http://www.syncfusion.com/downloads/product/build.aspx

Unlock key:

If your Essential Studio license is current,you will be able to obtain the key to install this version from your account in DirectTrac. Otherwise, please contact your Syncfusion Sales Representative or e-mail [e-mail].

Please let me know if you have any problem in our latest version.

Thanks,
Nagaraj