Diagram Connection Source/Target Problem On Load

[kim]

I use diagram each Tab Item.

And I tried save & load diagram.

it worked. but, connection's Source/Target is null when I change the tab.

then I checked DeserializeLink in GraphSource.

'base.DeserializeLink(connection, info)' is not return Source/Target.

Help me,,,

 

in GraphSource.

public override void SerializeLink(Link link, SerializationInfo info)
        {
            this.ClearCache();
            base.SerializeLink(link, info);
        }
        public override Link DeserializeLink(IConnection connection, SerializationInfo info)
        {
            return base.DeserializeLink(connection, info);
        }

[Martin Ivanov]

Can you send over a runnable sample showing the complete setup? This way I can run it and see if I can come up with a solution.

[kim]

I made some sample.

In sample,  seems like linked. but, Source/Target's Content is null in GraphSource Link.

[Martin Ivanov]

Thank you for the project. I've tested it with the latest version of Telerik UI for WPF, but I wasn't able to reproduce the issue. On my side, the Source and Target properties of the connection are not null in the DeserializeLink() method. Here are the steps that I follow:

1. In the first tab, I create a copy of the shape using Ctrl+C and Ctrl+V.
2. Then, I connect the two shapes using the mouse, which creates a connection object.
3. I click the Save button and save an .xml file with the current diagram.
4. I open the second tab, and Load the previously saved .xml file. At this point everything works as expected.
5. I delete the diagrams from both tabs and use the Load button to load the saved .xml again. Everything works as expected in both tabs.

Please let me know if I am missing anything.

I also attached the test project that I've used.

[kim]

It looks like it's connected, but Source/Target is null in Graphsource links  property using tab_SelectionChanged Event on behind-code.

I Checked another Method in GraphSource. When I check the param of the method, Source/Target is null.

This is Method that I added in GraphSource.

public override void AddLink(Link link)
        {
            base.AddLink(link);
        }

[Martin Ivanov]

I am not sure that I understand your setup. Can you edit my project to recreate this and list the steps that should be executed?

[kim]

1. In the first tab, I create a copy of the shape using Ctrl+C and Ctrl+V.
2. Then, I connect the two shapes using the mouse, which creates a connection object.
3. I click the Save button and save an .xml file with the current diagram.
4. I open the second tab, and Load the previously saved .xml file. At this point everything works as expected.

this steps are correct.

Next, Set break point on tab_SelectionChanged in behind-code.

and graphsource's link info is somethig worng in diagram that loaded file.

 

[Martin Ivanov]

I've tested this, but on my side the link has both is Source and Target. Can you check the images and tell me if I am missing anything?

[kim]

sorry, I didn't explain well.

your image is correct Source and Target's Data is null.

if Diagram's datacontext is changed and return, that info cause error.

So, I want keep Source and Target's Info when Loaded.

[Martin Ivanov]

Can you record a video showing the issue? This will give me a better idea for the concrete situation.

[kim]

In your image, link's info is different.

I think link's info is same in diagram1 and diagram2.

 

In my project, I use diagram in tab to usercontrol.

so tab's selecteditem is changed to viewmodel.

if link's info in graphsource is different that diagram's link is different.

[Martin Ivanov]

I am afraid that without recreating this I cannot tell what exactly happens. If you can modify my project (from one of the previous replies here) to produce the same issue I will take a look.

[kim]

I found my mistake when recreating example.

Thanks a lot.