Question

My Code:

 ObservableCollection<SampleCheckedData> interestrates = new ObservableCollection<SampleCheckedData>();
 XDocument xmlDocu = XDocument.Load(new MemoryStream(System.Text.UTF8Encoding.UTF8.GetBytes(result)));

                interestrates = (from rts in xmlDocu.Descendants("Friend")

                                 select new SampleCheckedData
                                 {

                                     Id = (string)rts.Element("userid"),
                                     Name = (string)rts.Element("name"),
                                     Icon = (string)rts.Element("imageurl"),
                                     VisibleStatus = (string)rts.Element("visiblestatus"),
                                     AppStatus = (string)rts.Element("loginstatus"),

                                     imgBubble =bitmapRed,
                                 }).ToList<SampleCheckedData>();

Then Getting Error as can’t implicitly convert system.collection.generic.list to system.collection.observablecollection like that.How to bind listbox items using observable collection?

EDIT:

Button b = sender as Button;
                    var res = interestrates.Where(a => a.Id.Equals(((System.Windows.FrameworkElement)(e.OriginalSource)).Tag)).ToList();
                    if (res.Count == 1)
                        interestrates.Remove(res.First());
                    interestrates = new ObservableCollection<SampleCheckedData>();
                    lstFriendRequuest.ItemsSource = "";
                    bindGetFriends();

Here successfully deleting item from list but after calling bindGetFriends() in that binding the items newly then i am not getting new items getting old items.why the service returning old items list?

Answer 1

Use this extension:

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;

public static class Extensions
{
    public static ObservableCollection<T> ToObservableCollection<T>(this IEnumerable<T> collection)
    {
        var observableCollection = new ObservableCollection<T>();
        foreach (var item in collection) observableCollection.Add(item);
        return observableCollection;
    }
}

Usage:

interestrates = (from rts in xmlDocu.Descendants("Friend") 
    select new SampleCheckedData
    {    
        Id = (string)rts.Element("userid"),
        Name = (string)rts.Element("name"),
        Icon = (string)rts.Element("imageurl"),
        VisibleStatus = (string)rts.Element("visiblestatus"),
        AppStatus = (string)rts.Element("loginstatus"),    
        imgBubble =bitmapRed,
    }).ToObservableCollection<SampleCheckedData>();