How to dynamically add or remove properties

[Jackey]

Hi team,

Say class A has a property which is a collection of Class B. Now i want to design a UI attached. 

So I wonder if propertygrid has such a built support, if not, how am i gonna do this? A self defined a data template for the property?

[Maya]

Hello Jingfei,

Generally, RadPropertyGrid will generate a CollectionEditor for a property of type collection. If you want to modify the behavior, you can work in an unbound mode and specify the bindings on your own. The article for "Unbound Mode" will be probably a useful resource in this case. 
Still, let us know in case you need further assistance. 


Regards,
Maya
Telerik

 

 

[Jackey]

Hi Maya,
Thanks for your reply. Now i realize i need to use RadDataForm to edit a collection of objects of A, and for each object of A, i stil have the requirements as above. Then how do i do? And the property is a virtual as requried by Entity frameork. And i found RadDataForm can't recoginze them.

[Maya]

Hello Jingfei,

If RadDataForm is a more appropriate control, you can follow its documentation for a reference on how to define custom fields. I guess the "Customized Fields"  and "Defining Custom DataFields" articles will be quite helpful.

Regards,
Maya
Telerik

 

 

[Jackey]

Hi Maya,

I followed customized fields, however, it didn't work. It shown nothing for one object A. it worked for auto-generated fields.

Could you give me an example? I mean a complete solutions(VS)

Thanks,
jingfei

[Maya]

Hello Jingfei,


You can find an example in our SDK repository. The one I think will be most helpful is DefiningCustomDataFields.

Regards,
Maya
Telerik

 

 

[Jackey]

Hi Maya,
Thanks for the github project. It helped a lot. However, in my implementation, when i clicked the new item symbol of data form controls, all the data fields were not blank, they seemed to inherit values from the previous shown ones. And when i clicked ok, in my backend, it would save to db. However, the db's values are all null for string, 0 for integers. It very confuses me a lot. I expect the new item would give a blank data field for me to input something. 

Thanks,
Jingfei

[Maya]

Hello Jingfei,

This sounds a bit strange. Will it be possible to update the project from the github so that it illustrates your scenario and reproduces the behavior and send it back to me ? In that way I will be able to debug it on my side and suggest a solution.

Regards,
Maya
Telerik

 

 

[Jackey]

Hello Maya,

Before repro that issue, can I make a wild guess is it because i use a DB<Set> to bind to the DataForm control?

Thanks,
Jingfei

[Jackey]

One thing to add, when I wrap the DBSet with ObservableCollection, then the problem is gone. So DBSet is to be blamed

[Maya]

Hi Jingfei,

I am happy to see that you resolved the issue you had. Let us know in case we can be of any further assistance.

Regards,
Maya
Telerik