This is my xaml:
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="InstagramCloneInterviewApp.MainPage"
x:Name="CurrentPage"
Title="Photos">
<ContentPage.Content>
<Grid>
<StackLayout>
<RefreshView IsRefreshing="{Binding IsRefreshing, Mode=OneWay}"
Command="{Binding LoadRefreshCommand}">
<CollectionView ItemsSource="{Binding Photos}" SelectionMode="Single" SelectedItem="{Binding SelectedPhoto}" RemainingItemsThreshold="{Binding CounterData}" RemainingItemsThresholdReachedCommand="{Binding LoadNewPhotosCommand}" >
<CollectionView.ItemTemplate>
<DataTemplate>
<Grid Padding="10">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="3*"/>
</Grid.ColumnDefinitions>
<Grid.GestureRecognizers>
<TapGestureRecognizer Command="{Binding Source={x:Reference CurrentPage}, Path=BindingContext.LoadSelectedPhotoCommand}" />
</Grid.GestureRecognizers>
<Image Aspect="AspectFit" HeightRequest="50" Source="{Binding Url}" Grid.Column="0"></Image>
<Label Text="{Binding Title}" Grid.Column="1"></Label>
</Grid>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
</RefreshView>
</StackLayout>
<StackLayout HorizontalOptions="CenterAndExpand" VerticalOptions="Center">
<Frame IsVisible="{Binding IsBusy}" BorderColor="#3498DB" HasShadow="False" BackgroundColor="#eeeeee">
<StackLayout>
<ActivityIndicator IsVisible="{Binding IsBusy}" IsRunning="{Binding IsBusy}" HorizontalOptions="Center" VerticalOptions="Center"></ActivityIndicator>
<Label TextColor="#3498DB" Text="Loading Data, Please Wait..." HorizontalTextAlignment="Center" VerticalTextAlignment="Center" HorizontalOptions="Center" VerticalOptions="Center" IsVisible="{Binding IsBusy}"/>
</StackLayout>
</Frame>
</StackLayout>
</Grid>
</ContentPage.Content>
</ContentPage>
This is SelectedPhoto object in the ViewModel:
public Photo SelectedPhoto
{
get { return selectedPhoto; }
set
{
if (selectedPhoto != value)
{
selectedPhoto = value;
SetProperty(ref selectedPhoto, value);
OnPropertyChanged("SelectedPhoto");
}
}
}
This is the task i get from Grid.TapGestureRecognizer and LoadSelectedPhotoCommand:
async Task ExecuteGetDetailsSelectedPhoto()
{
if (IsBusy)
return;
try
{
var test= SelectedPhoto;
}
catch (Exception ex)
{
Debug.WriteLine(ex);
var msg = ex.Message;
}
finally
{
IsBusy = false;
}
}
var test is always null.
It looks like item is not clicked. Does anyone have a similar experience or better idea to fix this?
The problem was Grid TapGesture override all space and SelectMode not working
Related
I am working on TabView control to create multiple tab page using "TabItemSource". In most of the sample provided in open source, the "TextColorSelected" property can be set in xct:TabViewItem. For my case, how can I set "TextColorSelected" property while using TabItemSource?
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:xct="clr-namespace:Xamarin.CommunityToolkit.UI.Views;assembly=Xamarin.CommunityToolkit"
x:Class="MultiPosApp.Restaurant.Views.KitchenOrderTicketView"
xmlns:prism="http://prismlibrary.com"
prism:ViewModelLocator.AutowireViewModel="True"
x:Name="KitchenOrderTicketVM"
Title="Kitchen Order Ticket">
<xct:TabView TabItemsSource="{Binding KitchenOrderCollection}" TabStripPlacement="Top" TabStripBackgroundColor="AliceBlue" TabStripHeight="50" IsSwipeEnabled="False" TabIndicatorColor="Black"
AbsoluteLayout.LayoutBounds="0,0,1,1" AbsoluteLayout.LayoutFlags="All" SelectedIndex="{Binding SelectedIdx}">
<xct:TabView.TabViewItemDataTemplate>
<DataTemplate>
<StackLayout HorizontalOptions="FillAndExpand" VerticalOptions="CenterAndExpand">
<Label Text="{Binding Location}"
HorizontalOptions="Center"
VerticalOptions="CenterAndExpand"
HorizontalTextAlignment="Center"
VerticalTextAlignment="Center"
TextColor="Black"
FontAttributes="Bold"/>
</StackLayout>
</DataTemplate>
</xct:TabView.TabViewItemDataTemplate>
<xct:TabView.TabContentDataTemplate>
<DataTemplate>
<ScrollView>
<StackLayout BindableLayout.ItemsSource="{Binding TableOrderCollection}" Orientation="Vertical" Margin="3">
<BindableLayout.ItemTemplate>
<DataTemplate>
<Frame BorderColor="LightGray" Padding="10" BackgroundColor="GhostWhite" HasShadow="True" CornerRadius="10">
<StackLayout Orientation="Vertical">
<StackLayout Orientation="Horizontal" HorizontalOptions="CenterAndExpand">
<Label Text="TABLE " TextColor="Black" FontSize="Large" FontAttributes="Bold"/>
<Label Text="{Binding Table.TableNum}" TextColor="Black" FontSize="Large" FontAttributes="Bold"/>
</StackLayout>
<StackLayout BindableLayout.ItemsSource="{Binding MenuOrderCollection}" Orientation="Vertical">
<BindableLayout.ItemTemplate>
<DataTemplate>
<StackLayout Orientation="Horizontal" HorizontalOptions="FillAndExpand">
<Label Text="{Binding ItemName}" TextColor="Black" FontSize="Medium" VerticalOptions="Center"/>
<Label Text="{Binding ItemQuantity}" TextColor="Black" FontSize="Medium" HorizontalOptions="EndAndExpand" VerticalOptions="Center"/>
<CheckBox IsChecked="{Binding MenuStatus}" IsEnabled="{Binding CheckboxEnabled}" HorizontalOptions="End">
<CheckBox.Behaviors>
<prism:EventToCommandBehavior EventName="CheckedChanged" Command="{Binding Path=BindingContext.ChkboxChangedCommand, Source={x:Reference Name=KitchenOrderTicketVM}}" CommandParameter="{Binding}"/>
</CheckBox.Behaviors>
</CheckBox>
</StackLayout>
</DataTemplate>
</BindableLayout.ItemTemplate>
</StackLayout>
</StackLayout>
</Frame>
</DataTemplate>
</BindableLayout.ItemTemplate>
</StackLayout>
</ScrollView>
</DataTemplate>
</xct:TabView.TabContentDataTemplate>
</xct:TabView>
I didn't find a way to set the TextColorSelected property in TabViewItemDataTemplate.
For scenarios where you are not sure of the number of TabViewItems, you could try drawing the layout in code behind.
Something like:
public Page10()
{
InitializeComponent();
....
foreach (var item in tabview.TabItemsSource) //here the tabitemsource is a array of strings for test.
{
var tabViewItem = new TabViewItem
{
Text = (string)item,
TextColor = Color.White,
TextColorSelected = Color.Red,
};
var label = new Label
{
HorizontalOptions = LayoutOptions.Center,
VerticalOptions = LayoutOptions.Center,
Text = (string)item
};
tabViewItem.Content = label;
tabview.TabItems.Add(tabViewItem);
}
}
define a x:Name for TabView:
<xct:TabView x:Name="tabview" TabItemsSource="{Binding KitchenOrderCollection}" TabStripPlacement="Top" TabStripBackgroundColor="AliceBlue" TabStripHeight="50" IsSwipeEnabled="False" TabIndicatorColor="Black"
AbsoluteLayout.LayoutBounds="0,0,1,1" AbsoluteLayout.LayoutFlags="All" SelectedIndex="{Binding SelectedIdx}">
...
</xct:TabView>
In Xamarin forms with MVVM ; I'm using observable collection for listing my items in the listview. It worked fine. In my listview i have a Label and i need to change the Label value when the user click on that selected list item. It's also working fine. But the problem is, Selected list item Label value changed only after i scroll the listview.
I need to change the selected list item's Label value On time.
Here is my code:
Xaml
<ListView x:Name="Listitem" Grid.Row="2" Grid.ColumnSpan="2" ItemsSource="{Binding States,Mode=TwoWay}" SelectedItem="{Binding YourSelectedItem,Mode=TwoWay}" VerticalOptions="FillAndExpand" HasUnevenRows="true" CachingStrategy="RecycleElement" BackgroundColor="White" >
<ListView.Header>
<Grid BackgroundColor="{StaticResource Accent}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Label Grid.Column="0" Text="Country Code" HorizontalOptions="Center" VerticalOptions="Center" TextColor="{StaticResource Primary}" />
<Label Grid.Column="1" Text="Name" HorizontalOptions="Center" TextColor="{StaticResource Primary}" />
<Label Grid.Column="2" Text="Capital" HorizontalOptions="Center" TextColor="{StaticResource Primary}" />
</Grid>
</ListView.Header>
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<ViewCell.View>
<Grid VerticalOptions="Center">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="3*" />
<ColumnDefinition Width="3*" />
<ColumnDefinition Width="3*" />
<ColumnDefinition Width="1*" />
</Grid.ColumnDefinitions>
<Label Grid.Column="0" Text="{Binding abbr}" Margin="5" HorizontalOptions="Center" VerticalOptions="Center" FontSize="18" TextColor="{StaticResource Primary}" />
<Label Grid.Column="1" Text="{Binding name}" Margin="5" HorizontalTextAlignment="Start" VerticalOptions="Center" FontSize="18" LineBreakMode="WordWrap" TextColor="{StaticResource Primary}"/>
<Label Grid.Column="2" Text="{Binding capital}" Margin="5" HorizontalTextAlignment="Start" VerticalOptions="Center" FontSize="18" LineBreakMode="WordWrap" TextColor="{StaticResource Primary}"/>
<controls:CheckBox Grid.Column="3" Margin="0, 0, 0, 0" CheckedChanged="Handle_CheckedChanged" BindingContext="{Binding .}" BackgroundColor="Transparent" WidthRequest="40" HeightRequest="30" IsVisible="True" />
</Grid>
</ViewCell.View>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
And this is my View model for selected list item;
public TodoItem YourSelectedItem
{
get
{
return _yourSelectedItem;
}
set
{
_yourSelectedItem = value;
_yourSelectedItem.abbr = "Tapped";
OnPropertyChanged("YourSelectedItem");
}
}
Item source property;
private ObservableCollection<TodoItem> _States;
public ObservableCollection<TodoItem> States
{
get { return _States; }
set { _States = value; OnPropertyChanged("States"); }
}
The class TodoItem needs to implement the interface INotifyPropertyChanged and the property abbr needs to be implemented as something like blow:
public string abbr {
get
{
return _abbr;
}
set
{
if (_abbr != value) {
_abbr = value;
OnPropertyChanged("abbr");
}
}
}
Homepage showing products in a list according to the category selected.Initially showing products of first category. API response is null for first category but count is correct,showing only blank frames. After switching from other categories, products are shown correctly.Awaited the tasks. I think the problem is with async-await calls.Help need to rectify this..
private async Task InitializeAsync()
{
await Get_categories(); //calling method
}
public Task Initialization { get; private set; }
public Grid_vm() //constructor
{
Initialization = InitializeAsync();
}
public async Task Get_categories()
{
var items = await restClient.Get_categories();
Categorylist = new List<Category_value>();
foreach (Category_data cat in items.data)
{
Category_value category = new Category_value();
if (cat.category_id=="6")
{
category.category_id = cat.category_id;
category.category_name = cat.category_name;
Categorylist.Add(category);
}
else
{
category.category_id = cat.category_id;
category.category_name = cat.category_name;
Categorylist.Add(category);
}
}
await Get_branch_products("6") ; // calling first category
}
public async Task Get_branch_products (string category_id)
{
RestClient restClient = new RestClient();
var items=await restClient.Get_branch_products2(category_id);//calling restAPI
Productlist = new List<Product_Value2>();//var items null initially
foreach (Product_Data p in items.data)
{
Product_Value2 val = new Product_Value2();
val.available_qty = p.available_qty;
if (p.status == "1")
{
val.visible = true ;
OnPropertyChanged("visible");
val.visibility = false;
OnPropertyChanged("visibility");
Productlist.Add(val);
}
else
{
val.visible = true ;
OnPropertyChanged("visible");
val.visibility = false;
OnPropertyChanged("visibility");
val.opacity = 0.25;
OnPropertyChanged("opacity");
Productlist.Add(val);
}
}
}
}
public async Task<ProductDetails> Get_branch_products2(string cat_id)
{
var formcontent = new FormUrlEncodedContent(new[]
{
new KeyValuePair<string,string>("category_id",cat_id)
});
var response = await client.PostAsync(base_url + "listbranchproduct", formcontent).ConfigureAwait(false);//execution returns null from here
var result = await response.Content.ReadAsStringAsync();//executed later
var status = JsonConvert.DeserializeObject<ProductDetails>(result);
return status;
}
<ListView x:Name="pdt_list" HasUnevenRows="True" SeparatorVisibility="None" ItemsSource="{Binding Productlist}" BackgroundColor="White" Margin="0,0,0,0">
<ListView.ItemTemplate>
<DataTemplate >
<ViewCell >
<ViewCell.View>
<Frame HasShadow="False" Margin=" 0,10,0,10" Padding="10,0,10,5" BackgroundColor="#f1f1f1" HeightRequest="80" HorizontalOptions="FillAndExpand" VerticalOptions="CenterAndExpand" >
<Grid Padding="0">
<!--<StackLayout HorizontalOptions="FillAndExpand" VerticalOptions="CenterAndExpand" Margin="0,10,0,10" >-->
<StackLayout VerticalOptions="FillAndExpand" Margin="0" Padding="10,0,0,0" Orientation="Horizontal" Opacity="{Binding opacity}">
<Image Source="{Binding image}" Aspect="AspectFill" WidthRequest="70" HeightRequest="180" VerticalOptions="FillAndExpand" />
<StackLayout HorizontalOptions="FillAndExpand" Orientation="Vertical" >
<Label Text="{Binding Name}" Font="Bold" VerticalTextAlignment="Center" FontSize="Small" TextColor="Black" FontFamily="opensans_light.ttf#opensans_light" Margin="10,20,0,0" />
<StackLayout Orientation="Horizontal" Margin="10,0,0,0" HorizontalOptions="Start" VerticalOptions="Start" >
<Label Text="{Binding sellingprice_default}" Font="Bold" HorizontalOptions="Start" Margin="0" TextColor="#FA2E27" VerticalTextAlignment="Start" FontSize="Small" FontFamily="opensans_light.ttf#opensans_light" />
<Label Text="QAR" TextColor="#FA2E27" HeightRequest="90" FontSize="Small" HorizontalOptions="Start" VerticalTextAlignment="Start" VerticalOptions="FillAndExpand" />
</StackLayout>
</StackLayout>
<ImageButton Source="carts.png" BackgroundColor="Transparent" IsVisible="{Binding visible}" HorizontalOptions="EndAndExpand" WidthRequest="40" HeightRequest="40" VerticalOptions="CenterAndExpand" Clicked="Add_cart_Clicked" Margin="0,20,0,0" Aspect="AspectFit">
</ImageButton>
<StackLayout Orientation="Horizontal" BackgroundColor="Transparent" IsVisible="{Binding visibility}" HorizontalOptions="EndAndExpand">
<ImageButton Source="minus.png" HorizontalOptions="End" VerticalOptions="Center" Aspect="Fill" BackgroundColor="Transparent" WidthRequest="20" HeightRequest="20" Clicked="Minus_Tapped" />
<Label Text="{Binding Number2}" VerticalTextAlignment="Center" HorizontalOptions="EndAndExpand" FontSize="Medium" TextColor="Black" FontFamily="opensans_light.ttf#opensans_light" Margin="0,0,0,0" />
<ImageButton Source="plus2.png" HorizontalOptions="End" Aspect="Fill" VerticalOptions="Center" BackgroundColor="Transparent" WidthRequest="20" HeightRequest="20" Clicked="Plus_Tapped" />
</StackLayout>
</StackLayout>
<StackLayout BackgroundColor="Black" HorizontalOptions="EndAndExpand" VerticalOptions="StartAndExpand" WidthRequest="100" HeightRequest="25" IsVisible="{Binding opaque}" Margin="0,0,0,0" >
<Label Text="Not Available" FontFamily="opensans_light.ttf#opensans_light" TextColor="White" FontAttributes="Bold" HorizontalOptions="Center" VerticalTextAlignment="Center" />
</StackLayout>
</Grid>
</Frame>
</ViewCell.View>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
opacity was provided inside the Get_branch_products (string category_id) method else block as 0.25.
val.opacity = 1;
OnPropertyChanged("opacity");
was not given inside if block adding it there solved the issue.
After press, the return button on-screen keyboard the listview hide from the iOS screen. The same code is running perfectly on Android. I have create the 30 second video that will help you understand the problem.
The code file and Video can be download from here https://drive.google.com/drive/folders/1Q4O1KexIHvrCX79AR3CesRXJRWM1o2JR?usp=sharing
<ListView x:Name="listViewOrder" ItemTapped="OnActivitySelected" HasUnevenRows="True">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Frame HasShadow="True" OutlineColor="Silver" Padding="3">
<Grid BackgroundColor="{Binding RowColour}" ColumnSpacing="2" Padding="2">
<StackLayout Orientation="Horizontal" HeightRequest="35" BackgroundColor="{Binding RowColour}" Padding="10">
<StackLayout Spacing="0" BackgroundColor="{Binding RowColour}" Orientation="Horizontal" HorizontalOptions="Start">
<Label FontSize="Medium" TextColor="#707070" Text="{Binding GFIELD3}" HorizontalOptions="StartAndExpand" VerticalOptions="Center"/>
</StackLayout>
<StackLayout Spacing="0" BackgroundColor="{Binding RowColour}" Orientation="Horizontal" HorizontalOptions="EndAndExpand">
<Image Aspect="AspectFit" Source = "{Binding ImageStatus}" HorizontalOptions="StartAndExpand" VerticalOptions="Center" HeightRequest = "20" WidthRequest="20" />
</StackLayout>
</StackLayout>
</Grid>
</Frame>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<StackLayout x:Name="layoutForBluetooth" HeightRequest="200" Padding="5, 5, 5, 5" BackgroundColor="#5DCBEE" Orientation="Horizontal" HorizontalOptions="FillAndExpand">
<Frame Padding="5,5,5,5" HorizontalOptions="FillAndExpand" OutlineColor="Black" HasShadow="True">
<Grid>
<Label Text="Scan Your Barcode" x:Name="lblDriverNumber" TextColor="Black" FontSize="Medium" HorizontalOptions="FillAndExpand" Margin="0,10" />
<Entry x:Name="txtentry" FontSize="Medium" TextColor="Black" WidthRequest="400" HorizontalOptions="FillAndExpand" VerticalOptions="CenterAndExpand" />
</Grid>
</Frame>
async void Txtentry_Completed(object sender, EventArgs e)
{
BiendListview(orderID);
}
public void BiendListview(int OID)
{
try
{
List<GenericFields> GN = new List<GenericFields>();
GN = GetDeliveryOrderItems(OID);
if (GN != null)
{
// listViewOrder.BeginRefresh();
listViewOrder.ItemsSource = GN;
// listViewOrder.EndRefresh();
}
}
catch (Exception ex)
{
}
}
Please make a breakpoint to debug your GN's value. From your code:
if (GN != null)
{
// listViewOrder.BeginRefresh();
listViewOrder.ItemsSource = GN;
// listViewOrder.EndRefresh();
}
This if statement will always be true, since you have construct the GN by List<GenericFields> GN = new List<GenericFields>();. It will never be null.
You can try to modify it to:
if (GN.Count != 0)
{
// listViewOrder.BeginRefresh();
listViewOrder.ItemsSource = GN;
// listViewOrder.EndRefresh();
}
I am currently working on a Xamarin CrossPlatform project and have implemented a Listview bound to an ObservableCollection. Everything works out fine until I remove an Item from the ListView. The images in the follow up items within the ListView disappear randomly - not all of them and a different amount of them every time. I guess it has something to do with the MemoryStream, but what do I have to change? Here´s the relevant part of my Model that is bound to the ListView:
public string ImageBase64
{
get
{
return imagebase64;
}
set
{
if (imagebase64 != value)
{
imagebase64 = value;
OnPropertyChanged(nameof(ImageBase64));
OnPropertyChanged(nameof(ImageSource));
}
}
}
public ImageSource ImageSource
{
get
{
if (!string.IsNullOrEmpty(imagebase64))
{
return ImageSource.FromStream(() => new MemoryStream(Convert.FromBase64String(imagebase64)));
}
else
{
return null;
}
}
}
Here´s the relevant XAML:
<ListView x:Name="listView" Margin="20" ItemsSource="{Binding}" ItemSelected="OnListItemSelected" HasUnevenRows="True" SeparatorColor="{StaticResource primaryGreen}" SeparatorVisibility="Default">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Grid Margin="0,5,0,5">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="auto" />
<RowDefinition Height="auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="65" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="45" />
</Grid.ColumnDefinitions>
<Image Grid.Column="0" Grid.RowSpan="3" Margin="-2,-2,-2,-2" Source="{Binding ImageSource}" HorizontalOptions="Start" VerticalOptions="Center" Aspect="AspectFill"/> <!-- This is the displayed Image -->
<Label Margin="10,0,0,0" Grid.Column="1" Grid.Row="0" FontAttributes="Bold" FontSize="18" TextColor="{StaticResource primaryGreen}" Text="{Binding VorNachname}" VerticalTextAlignment="Start" HorizontalTextAlignment="Start"/>
<Label Margin="10,0,0,0" Grid.Column="1" Grid.Row="1" Text="{Binding MediumSelected.Wert, StringFormat='via {0}'}" HorizontalOptions="FillAndExpand" VerticalTextAlignment="Start" HorizontalTextAlignment="Start"/>
<StackLayout Margin="10,0,0,0" Grid.Column="1" Grid.Row="2" Orientation="Horizontal" HorizontalOptions="FillAndExpand">
<Label Text="{Binding Alter,StringFormat='Alter: {0}'}" VerticalTextAlignment="Start" HorizontalTextAlignment="Start" HorizontalOptions="Start"/>
</StackLayout>
<StackLayout Margin="0,0,0,-5" Grid.Column="2" Grid.RowSpan="3" Orientation="Vertical" HorizontalOptions="End" VerticalOptions="End">
<Button WidthRequest="40" HeightRequest="40" BackgroundColor="White" BorderWidth="0" BorderColor="White" Image="socialmedia_18.png" Clicked="OnChangeClicked" CommandParameter ="{Binding}" VerticalOptions="EndAndExpand" />
<Button Margin="0,-15,0,0" WidthRequest="40" HeightRequest="40" BackgroundColor="White" BorderColor="White" Image="cancel_18.png" Clicked="OnDeleteClicked" CommandParameter ="{Binding}" VerticalOptions="End" />
</StackLayout>
</Grid>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
...and the Code behind:
async void OnDeleteClicked(object sender, EventArgs e)
{
Helper.TrackEvent("PeopleList_OnDeleteClicked");
//Get selected Person
Person person = (Person)((Button)sender).CommandParameter;
//Remove from Model
DBHelper.DBModel.People.Remove(person);
//Update database
App.Database.UpdateWithChildren(DBHelper.DBModel);
}
EDIT:
Resizing the images does not help, same problem. I tried it by binding a testvariable ImageSourceThumb to the ListViewItemImage:
public ImageSource ImageSourceThumb
{
get
{
if (!string.IsNullOrEmpty(imagebase64))
{
return ImageSource.FromStream(() => new MemoryStream(ImageResizer.ResizeImage(Convert.FromBase64String(imagebase64), 64, 64)));
}
else
{
return null;
}
}
}
I had a similar problem. When I loaded or updated my listview not all the images showed up.
I fixed my problem resizing the images. Huge images gived me a outofmemory exception. Resizing those images to a smaller resolution fixed these problems.