private void TapGestureRecognizer_Tapped(object sender, EventArgs e)
{
var image = (sender as Image);
var groupResult = image.BindingContext as GroupResult;
if (groupResult == null)
{
return;
}
var items = groupResult.Items.ToList <MusicInfo>().ToList();
if ((items.All(listItem => listItem.IsSelected == true)))
{
for (int i = 0; i < items.Count(); i++)
{
var item = items[i];
(item as MusicInfo).IsSelected = false;
}
}
else if ((items.All(listItem => listItem.IsSelected == false)))
{
for (int i = 0; i < items.Count(); i++)
{
var item = items[i];
(item as MusicInfo).IsSelected = true;
}
}
this.RefreshGroupHeader(groupResult);
ListView.RefreshView();
}
private void SearchBar_TextChanged(object sender, TextChangedEventArgs e)
{
if (ListView.DataSource != null)
{
ListView.DataSource.Filter = FilterContacts;
ListView.DataSource.RefreshFilter();
}
ListView.RefreshView();
}
private void SearchBar_TextChanged(object sender, TextChangedEventArgs e)
{
if (ListView.ItemsSource != null && (e.NewTextValue.Length >= 3 || e.NewTextValue.Length == 0))
{
ListView.DataSource.Filter = FilterContacts;
ListView.DataSource.RefreshFilter();
}
ListView.RefreshView();
}
//Method 1 : Get SfListView reference using Grid.ChildAdded Event
private void Grid_ChildAdded(object sender, ElementEventArgs e)
{
if (e.Element is SfListView)
{
listView = e.Element as SfListView;
listView.RefreshView();
}
if (e.Element is Button)
{
button = e.Element as Button;
button.Clicked += Button_Clicked;
}
}
private void AddButton_Clicked(object sender, EventArgs e)
{
var viewModel = (sender as Button).BindingContext as ContactsViewModel;
viewModel.ContactsInfo.Add(new Contacts()
{
ContactName = "John", ContactImage = ImageSource.FromResource("ListViewXamarin.Images.Image" + 5 + ".png"), ContactNumber = "721-821"
});
Device.BeginInvokeOnMainThread(() =>
{
var groupCount = ListView.DataSource.Groups.Count;
ListView.DataSource.Groups.MoveTo(groupCount - 1, 0);
ListView.RefreshView();
});
}