private void ListView_SelectionChanging(object sender, ItemSelectionChangingEventArgs e)
{
if (e.AddedItems.Count > 0 && (e.AddedItems[0] as Contacts).Category == "Non-Selectable items")
{
e.Cancel = true;
}
}
protected override void WndProc(ref Message m)
{
if (m.Msg == 0x2000 + 0x004E) // [reflected] WM_NOTIFY
{
uint nmhdrCode = (uint)Marshal.ReadInt32(m.LParam, NmHdrCodeOffset);
if (nmhdrCode == LVN_ITEMCHANGING)
{
NMLISTVIEW nmlv = (NMLISTVIEW)Marshal.PtrToStructure(m.LParam, typeof(NMLISTVIEW));
if ((nmlv.uChanged & LVIF_STATE) != 0)
{
bool currentSel = (nmlv.uOldState & LVIS_SELECTED) == LVIS_SELECTED;
bool newSel = (nmlv.uNewState & LVIS_SELECTED) == LVIS_SELECTED;
if (newSel != currentSel)
{
ItemSelectionChangingEventArgs e = new ItemSelectionChangingEventArgs(nmlv.iItem, newSel, currentSel);
OnItemSelectionChanging(e);
m.Result = e.Cancel ? (IntPtr)1 : IntPtr.Zero;
return;
}
}
}
}
base.WndProc(ref m);
}
private void ListView_SelectionChanging(object sender, ItemSelectionChangingEventArgs e)
{
GroupResult actualGroup = null;
object key = null;
var selectedItems = listView.SelectedItems;
//To Cancel the Deselection
if (e.RemovedItems.Count > 0 && selectedItems.Contains(e.RemovedItems[0]))
{
e.Cancel = true;
return;
}
//To return when SelectedItems is zero
if (e.AddedItems.Count <= 0)
{
return;
}
var itemData = (e.AddedItems[0] as Contacts);
var descriptor = listView.DataSource.GroupDescriptors[0];
if (descriptor.KeySelector == null)
{
var pbCollection = new PropertyInfoCollection(itemData.GetType());
key = pbCollection.GetValue(itemData, descriptor.PropertyName);
}
else
{
key = descriptor.KeySelector(itemData);
}
for (int i = 0; i < listView.DataSource.Groups.Count; i++)
{
var group = listView.DataSource.Groups[i];
if ((group.Key != null && group.Key.Equals(key)) || group.Key == key)
{
actualGroup = group;
break;
}
}
if (selectedItems.Count > 0)
{
foreach (var item in actualGroup.Items)
{
var groupItem = item;
if (selectedItems.Contains(groupItem))
{
listView.SelectedItems.Remove(groupItem);
break;
}
}
}
}
private void ListView_SelectionChanging(object sender, ItemSelectionChangingEventArgs e)
{
var M = (MilestonesInfo)e.AddedItems[0];
//if (e.AddeItems.Count > 0 && e.AddedItems[0] == ViewModel.Items[0])
// e.Cancel = true;
Navigation.PushAsync(new MilestonesInfoView(M, CurrentChild));
}
private void OnSelectionChanging(ItemSelectionChangingEventArgs obj)
{
var eventArgs = obj as ItemSelectionChangingEventArgs;
if (eventArgs.AddedItems.Count > 0 && eventArgs.AddedItems[0] == this.BookInfoCollection[0])
{
eventArgs.Cancel = true;
}
}
protected virtual void OnItemSelectionChanging(ItemSelectionChangingEventArgs e)
{
EventHandler <ItemSelectionChangingEventArgs> handler =
(EventHandler <ItemSelectionChangingEventArgs>)Events[ItemSelectionChangingEvent];
if (handler != null)
{
handler(this, e);
}
}
/// <summary>
/// Triggers while list view selection was changing
/// </summary>
/// <param name="sender">ListView_SelectionChanging event sender</param>
/// <param name="e">ListView_SelectionChanging event args e</param>
private void ListView_SelectionChanging(object sender, ItemSelectionChangingEventArgs e)
{
if (e.AddedItems.Count > 0)
{
this.viewModel.Data = e.AddedItems[0] as WeatherData;
this.UpdateData(this.viewModel.Data.Temperature);
}
else if (e.AddedItems.Count == 0)
{
e.Cancel = true;
}
}
private async void ListView_SelectionChanging(object sender, ItemSelectionChangingEventArgs e)
{
ProductUnit needItem = (ProductUnit)e.AddedItems[0];
if (e.AddedItems.Count > 0 && e.AddedItems[0] == ProductUnits[0])
{
e.Cancel = true;
}
var regionPageContent = GetRegionPageContent(needItem.Unit_id);
await Navigation.PushAsync(new RegionListPage(regionPageContent));
}
private void ListView_SelectionChanging(object sender, ItemSelectionChangingEventArgs e)
{
for (int i = 0; i < e.AddedItems.Count; i++)
{
var item = e.AddedItems[i] as Contacts;
item.IsSelected = true;
}
for (int i = 0; i < e.RemovedItems.Count; i++)
{
var item = e.RemovedItems[i] as Contacts;
item.IsSelected = false;
}
}
private void ListView_SelectionChanging(object sender, ItemSelectionChangingEventArgs e)
{
if (listView.SelectionMode == Syncfusion.ListView.XForms.SelectionMode.Single)
{
if (e.AddedItems.Count > 0)
{
var item = e.AddedItems[0] as Contacts;
item.LabelTextColor = Color.Red;
}
if (e.RemovedItems.Count > 0)
{
var item = e.RemovedItems[0] as Contacts;
item.LabelTextColor = Color.Black;
}
}
}
private async void ListView_SelectionChanging(object sender, ItemSelectionChangingEventArgs e)
{
if (scanPage != null && scanPage.scanner != null && scanPage.scanner.Result != null)
{
ProductRegion needItem = (ProductRegion)e.AddedItems[0];
if (e.AddedItems.Count > 0 && e.AddedItems[0] == Regions[0])
{
e.Cancel = true;
}
bool result = await DisplayAlert("Подтвердить действие", "Добавить изделие?", "Да", "Нет");
if (result)
{
string statusRequest = RestApi.NewProductEvent(scanPage.scanner.Result.Text, needItem.Region_id);
Message(statusRequest);
}
}
}
private void ListView_SelectionChanging(object sender, ItemSelectionChangingEventArgs e)
{
}
void ListView_SelectionChanging(object sender, ItemSelectionChangingEventArgs e)
{
DisplayAlert("Kobe", "PIPPO", "OK");
}
