ItemObservableCollection

rex64

I have an ItemObservableCollection called _MyChildren with a collection of clsChild. I am trying to get nonfictions when a clsChild.name string is changed. Error I am getting on MyChildren.ItemPropertyChanged:

Severity Code Description Project File Line Suppression State
Error CS1661 Cannot convert anonymous method to type 'EventHandler>' because the parameter types do not match the delegate parameter types C-Sharp-Tests C:\Users\Jeff\Documents\GitHub\C-Sharp-Tests\C-Sharp-Tests\C-Sharp-Tests\clsParent.cs 21 Active

clsParent:

using Countdown;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace C_Sharp_Tests
{
internal class clsParent : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;

    private ItemObservableCollection \_MyChildren;

    public clsParent()
    {
        \_MyChildren = new ItemObservableCollection();
        this.\_MyChildren.ItemPropertyChanged += delegate (object sender, PropertyChangedEventArgs e)
        {
            if (string.Equals("IsChanged", e.PropertyName, StringComparison.Ordinal))
            {
                this.RaisePropertyChanged("IsChanged");
            }
        };
    }
}

}

clsChild:

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace C_Sharp_Tests
{
internal class clsChild : INotifyPropertyChanged
{

    public event PropertyChangedEventHandler PropertyChanged;

    public string name { get; set; }


}

}

ItemObservableCollection:

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Countdown
{
/// /// You can use it like this:
/// var orders = new ItemObservableCollection();
/// orders.CollectionChanged += OnOrdersChanged;
/// orders.ItemPropertyChanged += OnOrderChanged;
///
/// The type
public sealed class ItemObservableCollection

Lost User

I don't see why you just didn't stick with ObservableCollection. It's concurrent for read only. You simply "subscribe / unsubscribe". As if you can predict what properties to refresh on the client side.

"Before entering on an understanding, I have meditated for a long time, and have foreseen what might happen. It is not genius which reveals to me suddenly, secretly, what I have to say or to do in a circumstance unexpected by other people; it is reflection, it is meditation." - Napoleon I