BindableLayout cannot convert to 'System.Collections.IEnumerable'

Question

Hi,

I am trying to read the REST from:

https://documentation.onesignal.com/reference/view-notification

but getting:

cannot convert to 'System.Collections.IEnumerable'

I tried both:

Root data = JsonSerializer.Deserialize(result);

and:

Root data = (Root)JsonSerializer.Deserialize>(result);

This is my code:

var client = new HttpClient();

UriBuilder builder = new UriBuilder(string.Format("https://onesignal.com/api/v1/notifications/{0}", message_id));
builder.Query = "app_id=" + SecureStorage.GetAsync("AppID").Result;

client.DefaultRequestHeaders.Add("authorization", "Basic " + SecureStorage.GetAsync("AppAuthID").Result);

var response = await client.GetAsync(builder.Uri);

var result = await response.Content.ReadAsStringAsync();

// Root data = JsonSerializer.Deserialize(result);
Root data = (Root)JsonSerializer.Deserialize>(result);

BindableLayout.SetItemsSource(ScrollViewNotification, data);

Here is the Class:

public class Contents
{
    public string ar { get; set; }
    public string en { get; set; }
}

public class Data
{
}

public class Headings
{
}

public class ApnsAlert
{
}

public class Ios
{
    public int successful { get; set; }
    public int failed { get; set; }
    public int errored { get; set; }
    public int converted { get; set; }
    public int received { get; set; }
}

public class Android
{
    public int successful { get; set; }
    public int failed { get; set; }
    public int errored { get; set; }
    public int converted { get; set; }
    public int received { get; set; }
}

public class PlatformDeliveryStats
{
    public Ios ios { get; set; }
    public Android android { get; set; }
}

public class Root
{
    public object adm_big_picture { get; set; }
    public object adm_group { get; set; }
    public object adm_group_message { get; set; }
    public object adm_large_icon { get; set; }
    public object adm_small_icon { get; set; }
    public object adm_sound { get; set; }
    public object spoken_text { get; set; }
    public object alexa_ssml { get; set; }
    public object alexa_display_title { get; set; }
    public object amazon_background_data { get; set; }
    public object android_accent_color { get; set; }
    public object android_group { get; set; }
    public object android_group_message { get; set; }
    public object android_led_color { get; set; }
    public object android_sound { get; set; }
    public int android_visibility { get; set; }
    public string app_id { get; set; }
    public object big_picture { get; set; }
    public object buttons { get; set; }
    public bool canceled { get; set; }
    public object chrome_big_picture { get; set; }
    public object chrome_icon { get; set; }
    public object chrome_web_icon { get; set; }
    public object chrome_web_image { get; set; }
    public object chrome_web_badge { get; set; }
    public object content_available { get; set; }
    public Contents contents { get; set; }
    public int converted { get; set; }
    public Data data { get; set; }
    public object delayed_option { get; set; }
    public object delivery_time_of_day { get; set; }
    public int errored { get; set; }
    public List

Answer

Hello,

Welcome to our Microsoft Q&A platform!

I'm afraid you need to change the Root data = (Root)JsonSerializer.Deserialize>(result); to

 Root data = JsonConvert.DeserializeObject(result);

From the Txt file your provided, we can see this result is not a list, the json formart is {......}, so it cannot convert to System.Collections.IEnumerable , only this formart [......] can be converted .

In addition, android_visibility , ios_badgeCount, ios_relevance_score , isSMS , priority , ttl these fields are null in the Txt file your provided, however, they cannot be null. So, I change these Property Type to object in class Root.

public object android_visibility { get; set; }

For more information about IEnumerable Interface , you could refer to
https://learn.microsoft.com/en-us/dotnet/api/system.collections.ienumerable?view=net-6.0

------------update-----------
According to your StackLayout, if you use BindableLayout.SetItemsSource, the layout is a collection, you could set ItemTemplate, refer to the following code :

 var data = JsonConvert.DeserializeObject(json);  
 var bindObject = new Root[]  
                 {  
                    data,  
                 };  
 BindableLayout.SetItemsSource(StackLayoutNotification, bindObject);

Xaml

For more information, you could refer to https://learn.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/layouts/bindable-layouts

In addition, I noticed that there is only one object, you also could use MVVM and Data Binding to bind Root class.

Best Regards,
Wenyan Zhang

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BindableLayout cannot convert to 'System.Collections.IEnumerable'

1 answer