How to Resolve \'This type of CollectionView does not support changes to its SourceCollection from a thread different from the Dispatcher thread\'?

Error: "This type of CollectionView does not support changes to its SourceCollection from a thread different from the Dispatcher thread"

Problem:

The error occurs when modifying an ObservableCollection on a thread other than the UI thread.

Solution:

1. Using Dispatcher.Invoke:

To update the ObservableCollection from a different thread, invoke the changes on the UI thread using Dispatcher.Invoke.

public void Load()
{
    matchList = new List<GetMatchDetailsDC>();
    matchList = proxy.GetMatch().ToList();

    foreach (EfesBet.DataContract.GetMatchDetailsDC match in matchList)
    {
        App.Current.Dispatcher.Invoke((Action)delegate
        {
            _matchObsCollection.Add(match);
        });
    }
}

2. Using async/await:

Alternatively, you can use async/await to execute the Load method asynchronously on the UI thread.

public void LoadAsync()
{
    Task.Run(async () =>
    {
        matchList = new List<GetMatchDetailsDC>();
        matchList = await proxy.GetMatchAsync();

        await Dispatcher.InvokeAsync(() =>
        {
            foreach (EfesBet.DataContract.GetMatchDetailsDC match in matchList)
            {
                _matchObsCollection.Add(match);
            }
        });
    });
}

DataGrid Binding and Refreshing:

Binding:

<DataGrid ItemsSource="{Binding MatchObsCollection}"/>

Refreshing Asynchronously:

To refresh the DataGrid asynchronously, call the Refresh method on the dispatcher in a delegate.

public void RefreshDataGridAsync()
{
    Task.Run(() =>
    {
        Dispatcher.InvokeAsync(() =>
        {
            dataGridParent.ItemsSource = null;
            dataGridParent.ItemsSource = MatchObsCollection;
        });
    });
}

The above is the detailed content of How to Resolve \'This type of CollectionView does not support changes to its SourceCollection from a thread different from the Dispatcher thread\'?. For more information, please follow other related articles on the PHP Chinese website!