How can I store List in local settings?

Question

Currently i am using the following method to store the data which compiles successfully

App.removalList.Add(new RemoveFavourites(App.user.auth_token, App.user.user_id, proid.ToString()));

ApplicationData.Current.LocalSettings.Values["Remove_fav_properties_list"] = App.removalList;

It compiles successfully however i am getting the following error at runtime:

WinRT information: Error trying to serialize the value to be written to the application data store.
Additional information: Data of this type is not supported.

Following is the RemoveFavourites Class:

public class RemoveFavourites
{

    public string auth_token { get; set; }

    public string user_id { get; set; }

    public string property_id { get; set; }

    public RemoveFavourites(string auth_token, string user_id, string property_id)
    {
        this.auth_token = auth_token;
        this.user_id = user_id;
        this.property_id = property_id;
    }
}

and the complete exception is

An exception of type 'System.Exception' occurred in mscorlib.ni.dll but was not handled in user code WinRT information: Error trying to serialize the value to be written to the application data store Additional information: Data of this type is not supported. Error trying to serialize the value to be written to the application data store If there is a handler for this exception, the program may be safely continued.

You should be able to get inner exception details to check which property `RemoveFavourites` class is not being serialized successfully. Some types, say `SolidColorBrush`, are not serializable. — Nikhil Vartak, Dec 16 '15 at 09:50
Please show the definition of the actual type for `T` which you are using; the problem might be causes by the specific type. Please show also the definition of the list in the configuration file. — Codor, Dec 16 '15 at 09:52
Thankyou nvartak and codor for your quick responses i have updated the question. — Bilal Amjad, Dec 16 '15 at 09:56

Hamid Pourjam · Answer 1 · 2015-12-16T10:13:51.423

4

You can not store complex objects in app settings. (reference)

Try to serialize the object (maybe using json or custom way of serializing you have implemented yourself) and then store the data.

edited Dec 16 '15 at 10:13

answered Dec 16 '15 at 10:07

Hamid Pourjam

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Are you totally sure that it is impossible or is ist just impossible to configure in the IDE of Visual Studio? – Codor Dec 16 '15 at 10:12
see the reference @Codor – Hamid Pourjam Dec 16 '15 at 10:13
1

Thanks for the hint; note that [this answer](http://stackoverflow.com/questions/8688724/how-to-store-a-list-of-objects-in-application-settings) suggests using custom formatting to store objects of user-defined types (which could be considered as 'shoe-horning' one mechanism into another). – Codor Dec 16 '15 at 10:14

How can I store List in local settings?

1 Answers1