Develop Reference

Why my ListView databinding to observable collection don't show correctly

this is my class TaskTodo and the method GetTask this method connect with sqlite and return a observable collection
using Microsoft.Data.Sqlite;
using System;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.IO;
using Windows.Storage;
namespace uwp_to_do_list
{
public class TaskTodo : INotifyPropertyChanged
{
public string NameTask { get; set; }
public DateTime Reminder { get; set; }
public string NameList { get; set; }
public DateTime Date { get; set; }
public string SubTask { get; set; }
public string Priority { get; set; }
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(string propertyName)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
public ObservableCollection<TaskTodo> GetTasks()
{
var Tasks = new ObservableCollection<TaskTodo>();
//get data from sqlite3
string dbpath = Path.Combine(ApplicationData.Current.LocalFolder.Path, "TasksSqlite.db");
using (SqliteConnection db =
new SqliteConnection($"Filename={dbpath}"))
{
db.Open();
SqliteCommand selectCommand = new SqliteCommand
("SELECT Name_task from Task", db);
SqliteDataReader query = selectCommand.ExecuteReader();
while (query.Read())
{
TaskTodo taskTodo = new TaskTodo();
taskTodo.NameTask = query.GetString(0);
Tasks.Add(taskTodo);
}
db.Close();
}
return Tasks;
}
so i put this observable collection as the itemsource of listview, but this just show the type of the object not the field NameTask.
public MainView()
{
this.InitializeComponent();
TaskTodo taskTodo = new TaskTodo();
task_list.ItemsSource = taskTodo.GetTasks()
Debug.WriteLine(taskTodo.GetTasks()[4].NameTask);
}
i think the problem is in the xaml code because went i tested if the observable collection is empty
Debug.WriteLine(taskTodo.GetTasks()[4].NameTask);
the outpuy was tasxk3
my xaml code
<Page
x:Class="uwp_to_do_list.MainView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:uwp_to_do_list"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-
compatibility/2006" xmlns:fa="using:FontAwesome.UWP"
mc:Ignorable="d"
Background="#08090A"
>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto"></ColumnDefinition>
<ColumnDefinition Width="auto"></ColumnDefinition>
<ColumnDefinition Width="auto"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"></RowDefinition>
<RowDefinition Height="auto"></RowDefinition>
</Grid.RowDefinitions>
<StackPanel Background="#04000E" Width="240"
Grid.Column="0"
Grid.Row="0" HorizontalAlignment="Left" >
<TextBlock Text="today" Foreground="White" FontSize="24"
HorizontalAlignment="Center" Margin="0,50,0,0">
</TextBlock>
<fa:FontAwesome Icon="CalendarCheckOutline" Height="40"
Width="40" FontSize="40" Foreground="Fuchsia"
HorizontalAlignment="Left" Margin="20,-35,0,0">
</fa:FontAwesome>
<TextBlock Text="Tomorrow" Foreground="White"
FontSize="24" HorizontalAlignment="Center"
Margin="0,20,0,0"></TextBlock>
<fa:FontAwesome Icon="CalendarOutline" Height="40"
Width="40" FontSize="40" Foreground="Fuchsia"
HorizontalAlignment="Left" Margin="20,-35,0,0">
</fa:FontAwesome>
<TextBlock Text="planning" Foreground="White"
FontSize="24" HorizontalAlignment="Center"
Margin="0,20,0,0"></TextBlock>
<fa:FontAwesome Icon="Calendar" Height="40" Width="40"
FontSize="40" Foreground="Fuchsia"
HorizontalAlignment="Left" Margin="20,-35,0,0">
</fa:FontAwesome>
<TextBlock Text="tasks" Foreground="White" FontSize="24"
HorizontalAlignment="Center" Margin="0,20,0,0">
</TextBlock>
<fa:FontAwesome Icon="Home" Height="40" Width="40"
FontSize="40" Foreground="Fuchsia"
HorizontalAlignment="Left" Margin="20,-35,0,0">
</fa:FontAwesome>
</StackPanel>
<TextBox Grid.Row="1" HorizontalAlignment="Left"
Grid.Column="0" Text="+ add a list " Background="#04000E"
Foreground="White" Height="50" Width="240" ></TextBox>
<TextBox x:Name="add_Task_textbox" Grid.Row="1"
Grid.Column="1" KeyDown="add_Task_textbox_KeyDown"
HorizontalAlignment="Center" VerticalAlignment="Center"
Text="+ add a task" Background="#04000E" Foreground="White"
Height="40" Width="1000" Margin="20,0,-20,0" />
<ListView x:Name="task_list" Grid.Row="0" Grid.Column="1"
Background="Transparent">
<ListViewItem>
<DataTemplate x:DataType="local:TaskTodo">
<TextBlock Width="100" Foreground="White" Text="{x:Bind
NameTask}"></TextBlock>
</DataTemplate>
</ListViewItem>
</ListView>
</Grid>
</Page>
for more context my github repository

You should set the ItemTemplate property to your DataTemplate instead of adding a ListViewItem:
<ListView x:Name="task_list" Grid.Row="0" Grid.Column="1"
Background="Transparent">
<ListView.ItemTemplate>
<DataTemplate x:DataType="local:TaskTodo">
<TextBlock Width="100" Foreground="White"
Text="{x:Bind NameTask}" />
</DataTemplate>
<ListView.ItemTemplate>
</ListView>

Xamarin Forms Could Not Find DataContext

I am trying to bind properties of views in the view page to a class that I have in a carpet called ViewModel, and then from an instance of another class called Category (a model) in a carpet called Model I am trying to access to properties contained there, the problem is that it does not seem to work .Although there are no error codes in the codes, I cannot access the bindings when I run the application. The warning I get is:
Datacontext not found for binding SelectedCategory .CategoryName(I get the same warning in ProductItemByCategory binding)
Do you have any solution suggestions?
Thank You!!
I will explain it with more details in the code:
1.CategoryView.xaml
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:pancake="clr-namespace:Xamarin.Forms.PancakeView;assembly=Xamarin.Forms.PancakeView"
x:Class="DirencNetClone.Views.CategoryView">
<ContentPage.Content>
<ScrollView>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Label Grid.Row="1" Text="{Binding SelectedCategory.CategoryName}" FontSize="Body" Margin="25,-85,0,0" TextColor="Black" />
<ImageButton Source="logo.png" Grid.Row="0" HorizontalOptions="Start" Aspect="AspectFill" VerticalOptions="Start" Margin="10,30" Clicked="ImageButton_Clicked"/>
<pancake:PancakeView Grid.Row="2" BackgroundColor="Wheat" Margin="0,40">
<Grid Padding="25,30" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Label Grid.Row="0" Grid.Column="0" Text="{Binding TotalProductItems,StringFormat= '{0} Total Items'}" FontAttributes="Bold" FontSize="10" TextColor="Black"/>
<Image Grid.Row="0" Grid.Column="1" Source="info.png"/>
<CollectionView ItemsSource="{Binding ProductItemsByCategory}"
VerticalOptions="Start"
VerticalScrollBarVisibility="Never"
Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2"
SelectionMode="Single"
SelectionChanged="CollectionView_SelectionChanged">
<CollectionView.ItemTemplate>
<DataTemplate>
<StackLayout>
<Frame HasShadow="False" BackgroundColor="White" HeightRequest="90" Margin="0,10">
<Grid >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<pancake:PancakeView Grid.Column="0" Grid.Row="0" Grid.RowSpan="3" Margin="0,0,10,0 " >
<Image Source="{Binding ImageUrl}" HeightRequest="100" WidthRequest="95" Aspect="AspectFill"/>
</pancake:PancakeView>
<Label Grid.Row="0" Grid.Column="1" Grid.ColumnSpan="2" Text="{Binding Name}" FontSize="15" TextColor="Black"/>
<Label Grid.Row="0" Grid.Column="1" Grid.ColumnSpan="2" Text="{Binding Description}" FontSize="15" TextColor="Black"/>
<Label Grid.Row="2 " Grid.Column="1" Margin="30,0,0,0" VerticalOptions="Center" FontSize="15" >
<Label.FormattedText>
<FormattedString>
<Span Text="{Binding Rating}" FontAttributes="Bold" />
<Span Text="{Binding RatingDetail} " TextColor="Yellow"/>
</FormattedString>
</Label.FormattedText>
</Label>
<Image Grid.Row="0" Grid.Column="2" Source="{Binding HomeSelected}" HeightRequest="15"/>
<Label Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2" Text="{Binding Price}" FontSize="15" TextColor="Black"/>
</Grid>
</Frame>
</StackLayout>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
</Grid>
</pancake:PancakeView>
</Grid>
</ScrollView>
</ContentPage.Content>
2.CategoryViewModel.cs
public class CategoryViewModel:BaseViewModel
{
private Category _SelectedCategory;
public Category SelectedCategory
{
set
{
_SelectedCategory = value;
OnPropertyChanged();
}
get
{
return _SelectedCategory;
}
}
public ObservableCollection<ProductItem> ProductItemsByCategory { get; set; }
private int _TotalProductItems;
public int TotalProductItems
{
set
{
this._TotalProductItems = value;
OnPropertyChanged();
}
get
{
return this._TotalProductItems;
}
}
public CategoryViewModel( Category category)
{
SelectedCategory = category;
ProductItemsByCategory = new ObservableCollection<ProductItem>();
GetProductItems(category.CategoryID);
}
async void GetProductItems(int categoryID)
{
var data = await new ProductItemService().GetProductItemsByCategoryAsync(categoryID);
ProductItemsByCategory.Clear();
foreach (var item in data)
{
ProductItemsByCategory.Add(item);
}
TotalProductItems = ProductItemsByCategory.Count;
}
}
3.Category.cs(Model)
public class Category
{
public int CategoryID { get; set; }
public string ImageUrl { get; set; }
public string CategoryName { get; set; }
}
4.CategoryView.cs
public partial class CategoryView : ContentPage
{
CategoryViewModel cvm;
public CategoryView(Category category )
{
InitializeComponent();
cvm = new CategoryViewModel(category);
this.BindingContext=cvm
;
}
async void ImageButton_Clicked(object sender, EventArgs e)
{
await Navigation.PopModalAsync();
}
async void CollectionView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var selectedProduct = e.CurrentSelection.FirstOrDefault() as ProductItem;
if (selectedProduct == null)
return;
await Navigation.PushModalAsync(new ProductsDetailsView(selectedProduct));
((CollectionView)sender).SelectedItem = null;
}
}
5.BaseViewModel
public class BaseViewModel: INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
public void OnPropertyChanged([CallerMemberName] string name = null) =>
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
}
6.ProductItem(Model)
public class ProductItem
{
public int ProductID { get; set; }
public int CategoryID { get; set; }
public string Rating { get; set;
}
public string Description { get; set;
}
public string RatingDetail { get; set; }
public string HomeSelected { get; set; }
public string ImageUrl { get; set; }
public string Name { get; set; }
public double Price { get; set; }
}
7.ProductView.xaml
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="DirencNetClone.Views.ProductsView"
xmlns:vm="clr-namespace:DirencNetClone.ViewModels"
xmlns:pancake ="clr-namespace:Xamarin.Forms.PancakeView;assembly=Xamarin.Forms.PancakeView"
>
<ContentPage.BindingContext>
<vm:ProductsViewModel/>
</ContentPage.BindingContext>
<ContentPage.Content>
<Grid Margin="20,0,0,0">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid Grid.Row="0">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Image Source="logo.png " Grid.Row="0" Grid.Column="0" HorizontalOptions="Center"/>
<Label Text="{Binding UserEmail} " Grid.Row="1" Grid.Column="0" FontSize="Body"/>
<ImageButton Grid.Row="0" Grid.Column="1" Grid.RowSpan="2" Source="ic_menu_categories.png" Margin="0,0,10,0" HorizontalOptions="End"/>
<Label Text="{Binding UserCartItemsCount}" FontSize="Subtitle" Grid.Row="0" Grid.Column="2" Grid.RowSpan="2" HorizontalTextAlignment="End" VerticalTextAlignment="Start"/>
<ImageButton Grid.Row="0" Grid.Column="1" Grid.RowSpan="2" Source="ic_menu_basket.png" Margin="0,0,10,0" HorizontalOptions="Center"
Command="{Binding ViewCartCommand } "/>
<ImageButton Grid.Row="0" Grid.Column="3" Grid.RowSpan="2" Source="ic_menu_profile.png" Margin="0,0,10,0" HorizontalOptions="End" Command="{Binding LogoutCommand}"/>
</Grid>
<Grid Grid.Row="1" Grid.Column="0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<SearchBar Grid.Column="0" Placeholder="Ürün Ara" BackgroundColor="Transparent" HorizontalOptions="Fill"/>
</Grid>
<CollectionView ItemsSource="{Binding Categories} "
Margin="0,20"
HeightRequest="125"
VerticalOptions="FillAndExpand"
HorizontalScrollBarVisibility="Never"
ItemsLayout="HorizontalList"
SelectionChanged="CollectionView_SelectionChanged"
SelectionMode="Single"
Grid.Row="2">
<CollectionView.ItemTemplate>
<DataTemplate>
<StackLayout>
<Frame HeightRequest="50" HasShadow="False" BackgroundColor="White" CornerRadius="10">
<Image Source="{Binding ImageUrl}"/>
</Frame>
<Label Text="{Binding CategoryName} " HorizontalTextAlignment="Center"/>
</StackLayout>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
<Label Grid.Row="3" Text="Latest Items" FontSize="25" FontAttributes="Bold"/>
<CollectionView ItemsSource="{Binding LatestItems}" Margin="0,20,10,0" VerticalOptions="Start" VerticalScrollBarVisibility="Never" Grid.Row="4">
<CollectionView.ItemTemplate>
<DataTemplate>
<StackLayout>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto "/>
</Grid.RowDefinitions>
<pancake:PancakeView Grid.Row="0" Margin="0,0,10,0">
<Image Source="{Binding ImageUrl}" HeightRequest="220" Aspect="Fill"/>
</pancake:PancakeView>
<Frame Grid.Row="1" Margin="20,-80,20,70" BackgroundColor="Wheat" HorizontalOptions="End">
<Label Text="{Binding Price,StringFormat='{0:c}'}" FontSize="Medium" FontAttributes="Bold" TextColor="Black" HeightRequest="10"/>
</Frame>
<Label Grid.Row="1" Text="{Binding Name}" FontSize=" 22" FontAttributes="Bold" VerticalTextAlignment="Center" />
<Label Grid.Row="2" Margin="30,0,0,0" FontSize="15" VerticalOptions="Center" >
<Label.FormattedText>
<FormattedString>
<Span Text="{Binding Rating}" FontAttributes="Bold"/>
<Span Text="{Binding Description}" TextColor="White"/>
</FormattedString>
</Label.FormattedText>
</Label>
</Grid>
</StackLayout>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
</Grid>
</ContentPage.Content>
**8.ProductViewModel**
public class ProductsViewModel :BaseViewModel
{
private string _UserEMail;
public string UserEmail
{
set
{
this._UserEMail = value;
OnPropertyChanged();
}
get
{
return this._UserEMail;
}
}
public ObservableCollection<Category> Categories { get; set; }
public ObservableCollection<ProductItem> LatestItems { get; set; }
private int _UserCartItemsCount;
public int UserCartItemsCount
{
set
{
this._UserCartItemsCount = value;
OnPropertyChanged();
}
get
{
return this._UserCartItemsCount;
}
}
public Command ViewCartCommand { get; set; }
public Command LogoutCommand
{
get; set;
}
public ProductsViewModel()
{
var uemail = Preferences.Get("UserEmail", String.Empty);
if (String.IsNullOrEmpty(uemail))
UserEmail = "Guest";
else
UserEmail = uemail;
UserCartItemsCount = new CartItemService().GetUserCartCount();
Categories = new ObservableCollection<Category>();
LatestItems = new ObservableCollection<ProductItem>();
GetCategories();
GetLatestItems();
ViewCartCommand = new Command(async () => ViewCartAsync());
LogoutCommand = new Command(async () => await LogoutAsync());
}
async void GetLatestItems()
{
var data = await new ProductItemService().GetLatestProductItemsAsync();
LatestItems.Clear();
foreach(var item in data)
{
LatestItems.Add(item);
}
}
private async Task LogoutAsync()
{
await Application.Current.MainPage.Navigation.PushModalAsync(new LogoutVew());
}
private async void GetCategories()
{
var data = await new CategoryDataService().GetCategoriesAsync();
Categories.Clear();
foreach (var item in data)
{
Categories.Add(item);
}
}
private async Task ViewCartAsync()
{
await Application.Current.MainPage.Navigation.PushModalAsync(new CartView());
}

WPF: Creating the same grid for every object

I have a grid of one player that looks like this: image
and here is the code:
<Grid HorizontalAlignment="Left" VerticalAlignment="Top" Margin="5" Background="AliceBlue">
<Grid.ColumnDefinitions>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
</Grid.RowDefinitions>
<Label Grid.Column="4" Grid.Row="0" FontWeight="Bold">Pool</Label>
<Label Grid.Column="5" Grid.Row="0" FontWeight="Bold">Edge</Label>
<Label Grid.ColumnSpan="2" Grid.Row="0" HorizontalAlignment="Center" FontWeight="Bold">Felix</Label>
<Label Grid.Column="0" Grid.Row="1">Might</Label>
<Button x:Name="btMightP1" Margin="3" Grid.Column="1" Grid.Row="1" HorizontalAlignment="Center" VerticalAlignment="Center" Padding="3, 0, 3, 0" Click="btMightP1_Click">+</Button>
<TextBox x:Name="tbMight1" HorizontalAlignment="Center" VerticalAlignment="Center" Padding="2" Grid.Column="2" Grid.Row="1" MinWidth="40">10</TextBox>
<Button x:Name="btMightM1" Margin="3" Grid.Column="3" Grid.Row="1" HorizontalAlignment="Center" VerticalAlignment="Center" Padding="4, 0, 4, 0" Click="btMightM1_Click">-</Button>
<TextBox Name="lbMightPool1" Grid.Row="1" Grid.Column="4" HorizontalAlignment="Center">0</TextBox>
<TextBox Name="lbMightEdge1" Grid.Row="1" Grid.Column="5" HorizontalAlignment="Center">0</TextBox>
<Label Grid.Column="0" Grid.Row="2">Speed</Label>
<Button x:Name="btSpeedP1" Margin="3" Grid.Column="1" Grid.Row="2" HorizontalAlignment="Center" VerticalAlignment="Center" Padding="3, 0, 3, 0" Click="btSpeedP1_Click">+</Button>
<TextBox x:Name="tbSpeed1" HorizontalAlignment="Center" VerticalAlignment="Center" Padding="2" Grid.Column="2" Grid.Row="2" MinWidth="40">10</TextBox>
<Button x:Name="btSpeedM1" Margin="3" Grid.Column="3" Grid.Row="2" HorizontalAlignment="Center" VerticalAlignment="Center" Padding="4, 0, 4, 0" Click="btSpeedM1_Click">-</Button>
<TextBox Name="lbSpeedPool1" Grid.Row="2" Grid.Column="4" HorizontalAlignment="Center">0</TextBox>
<TextBox Name="lbSpeedEdge1" Grid.Row="2" Grid.Column="5" HorizontalAlignment="Center">0</TextBox>
<Label Grid.Column="0" Grid.Row="3">Intellect</Label>
<Button x:Name="btIntellectP1" Margin="3" Grid.Column="1" Grid.Row="3" HorizontalAlignment="Center" VerticalAlignment="Center" Padding="3, 0, 3, 0" Click="btIntellectP1_Click">+</Button>
<TextBox x:Name="tbIntellect1" HorizontalAlignment="Center" VerticalAlignment="Center" Padding="2" Grid.Column="2" Grid.Row="3" MinWidth="40">10</TextBox>
<Button x:Name="btIntellectM1" Margin="3" Grid.Column="3" Grid.Row="3" HorizontalAlignment="Center" VerticalAlignment="Center" Padding="4, 0, 4, 0" Click="btIntellectM1_Click">-</Button>
<TextBox Name="lbIntellectPool1" Grid.Row="3" Grid.Column="4" HorizontalAlignment="Center">0</TextBox>
<TextBox Name="lbIntellectEdge1" Grid.Row="3" Grid.Column="5" HorizontalAlignment="Center">0</TextBox>
</Grid>
code for Player class:
public class Player
{
public DataClass Might { get; set; }
public DataClass Speed { get; set; }
public DataClass Intellect { get; set; }
public string Name { get; set; }
public Player()
{
Might = new DataClass();
Speed = new DataClass();
Intellect = new DataClass();
}
and DataClass:
public class DataClass
{
public string Current { get; set; }
public string Pool { get; set; }
public string Edge { get; set; }
public DataClass()
{
Current = "0";
Pool = "0";
Edge = "0";
}
}
My question is how can I create identical grid every time I create an object of Player and tie the TextBoxes with newly created object's properties? Is this achievable only using data binding? I've tried to use it but I don't quite understand how the binding works.

Use listbox or ItemsControl.
<Listbox ItemSource="{Binding YourListOfPlayers}">
<Listbox.ItemTemplate>
<DataTemplate>
<Put your common grid here/>
</DataTemplate>
</Listbox.ItemTemplate>
</Listbox>

Listview not displaying data but showing namespace plus datamodel

I am using the folloowing class but its not allowing me to display show_times in my xaml its just comming up
popcornpk.datamodel.fetchtiming
public class FetchTiming
{
public string id { get; set; }
public string theater_name { get; set; }
public string address { get; set; }
public List<string> show_times { get; set; }
public string screen_id { get; set; }
public string title { get; set; }
}
public class MovieDetail
{
public MovieDetails movie_details { get; set; }
public List<FetchTiming> fetch_timing { get; set; }
}
My Class call
public async Task<MovieDetail> GetMovieShowtimesAsync()
{
string jsonresult = await WCFRESTServiceCall("GET", "movie_details");
var jarray = JsonConvert.DeserializeObject<MovieDetail>(jsonresult);
return jarray;
}
This is my xamlmethod call I hav eno idea what is going on the data is being returned ok but I just cant seem to dispaly it
private async void listViewShowtimes_Loaded(object sender, RoutedEventArgs e)
{
popcornpk_Dal _dal = new popcornpk_Dal();
MovieDetail _showTimes = await _dal.GetMovieShowtimesAsync();
var listView = (ListView)sender;
listView.ItemsSource = _showTimes.fetch_timing.ToList();
}
Xaml Of DataTemplate
<PivotItem x:Name="pvtShowTimes" Header="showtimes">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<ListView x:Name="listViewShowtimes" ItemsSource="{Binding}" Loaded="listViewShowtimes_Loaded">
<DataTemplate>
<StackPanel Height="505">
<TextBlock FontSize="13" x:Name="txtshowtime" Text="{Binding theater_name}" HorizontalAlignment="Left" Margin="19,223,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="212" Foreground="White" Height="29" SelectionChanged="txtTtile_SelectionChanged"/>
<TextBlock FontSize="13" x:Name="txtshow_times" Text="{Binding address}" HorizontalAlignment="Left" Margin="19,223,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="212" Foreground="White" Height="29" SelectionChanged="txtTtile_SelectionChanged"/>
</StackPanel>
</DataTemplate>
</ListView>
</Grid>
</PivotItem>
Below is a screen shot of the app running on the device any help be greatly apreciated.
Ok So i have it at least displaying the thertre name which is good on the show times screen but its still not allowing me to display the show_times field.
<ListView x:Name="listViewShowtimes" ItemsSource="{Binding}" Loaded="listViewShowtimes_Loaded">
<ListView.ItemTemplate>
<DataTemplate>
<Grid Grid.Row="0">
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition />
</Grid.ColumnDefinitions>
<TextBlock FontSize="13" Grid.Row="0" Grid.Column="0" x:Name="txtshowtime" Text="{Binding theater_name}" HorizontalAlignment="Left" TextWrapping="Wrap" VerticalAlignment="Top" Width="212" Foreground="White" Height="29" />
<TextBlock FontSize="13" Grid.Row="1" Grid.Column="0" x:Name="txtshow_times" Text="{Binding show_times}" HorizontalAlignment="Left" TextWrapping="Wrap" VerticalAlignment="Top" Width="212" Foreground="White" Height="29" />
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
I think what i need to no is how to bind a list of strings through xaml Problem I have i need the show times to appear below the cinema name you see their

You have Text="{Binding show_times}" so In your class FetchTiming,
public List<string> show_times { get; set; }
is a list so if you bind it to a TextBlock, it will simply do ToString(). You have to add inside the template another ListView like:
<TextBlock FontSize="13" Grid.Row="0" Grid.Column="0" x:Name="txtshowtime" Text="{Binding theater_name}" HorizontalAlignment="Left" TextWrapping="Wrap" VerticalAlignment="Top" Width="212" Foreground="White" Height="29" />
<ListView ItemsSource={Binding show_times} />
And will do the trick.

Binding ListView with DataTemplates containing UserControls to ViewModels in MVVM

I'm pretty new to MVVM so bear with me.
I'm working on an application that contains a contacts list. I've defined a contact user control with the following model:
public class Client
{
public string FirstName { get; set; }
public string MiddleName { get; set; }
public string LastName { get; set; }
public string PhoneNumber { get; set; }
public string Address1 { get; set; }
public string Address2 { get; set; }
public string City { get; set; }
public string State { get; set; }
public string ZipCode { get; set; }
public int CustomerID { get; set; }
public string FullName
{
get
{
string result = FirstName;
if (string.IsNullOrEmpty(result))
result = MiddleName;
else if(!string.IsNullOrEmpty(MiddleName))
result += string.Format(" {0}", MiddleName);
if (string.IsNullOrEmpty(result))
result = LastName;
else if (!string.IsNullOrEmpty(LastName))
result += string.Format(" {0}", LastName);
if (string.IsNullOrEmpty(result))
result = "";
return result;
}
}
}
And the following ViewModel:
public class ClientViewModel : ObservableObject
{
public Client Customer
{
get
{
return _customer;
}
set
{
_customer = value;
RaisePropertyChangedEvent("Customer");
}
}
public string FullName { get { return _customer.FullName; } }
public string PhoneNumber { get { return _customer.PhoneNumber; } }
public string Address1 { get { return _customer.Address1; } }
public string Address2 { get { return _customer.Address2; } }
public string City { get { return _customer.City; } }
public string State { get { return _customer.State; } }
public string ZipCode { get { return _customer.ZipCode; } }
Client _customer = new Client();
}
And the following View:
<UserControl x:Class="LawnCareManager.Views.ClientView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:LawnCareManager.ViewModels"
mc:Ignorable="d"
d:DesignHeight="180" d:DesignWidth="300">
<UserControl.DataContext>
<local:ClientViewModel/>
</UserControl.DataContext>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="1*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
</Grid.RowDefinitions>
<Label Grid.Row="0"
Grid.Column="0"
VerticalAlignment="Center"
HorizontalAlignment="Right"
Margin="10,0,0,0"
Content="Name: "/>
<Label Grid.Row="0"
Grid.Column="1"
VerticalAlignment="Center"
HorizontalAlignment="Left"
Margin="10,0,0,0"
Content="{Binding FullName}"/>
<Label Grid.Row="1"
Grid.Column="0"
VerticalAlignment="Center"
HorizontalAlignment="Right"
Margin="10,0,0,0"
Content="Phone Number: "/>
<Label Grid.Row="1"
Grid.Column="1"
VerticalAlignment="Center"
HorizontalAlignment="Left"
Margin="10,0,0,0"
Content="{Binding PhoneNumber}"/>
<Label Grid.Row="2"
Grid.Column="0"
VerticalAlignment="Center"
HorizontalAlignment="Right"
Margin="10,0,0,0"
Content="Address 1: "/>
<Label Grid.Row="2"
Grid.Column="1"
VerticalAlignment="Center"
HorizontalAlignment="Left"
Margin="10,0,0,0"
Content="{Binding Address1}"/>
<Label Grid.Row="3"
Grid.Column="0"
VerticalAlignment="Center"
HorizontalAlignment="Right"
Margin="10,0,0,0"
Content="Address 2: "/>
<Label Grid.Row="3"
Grid.Column="1"
VerticalAlignment="Center"
HorizontalAlignment="Left"
Margin="10,0,0,0"
Content="{Binding Address2}"/>
<Label Grid.Row="4"
Grid.Column="0"
VerticalAlignment="Center"
HorizontalAlignment="Right"
Margin="10,0,0,0"
Content="City: "/>
<Label Grid.Row="4"
Grid.Column="1"
VerticalAlignment="Center"
HorizontalAlignment="Left"
Margin="10,0,0,0"
Content="{Binding City}"/>
<Label Grid.Row="5"
Grid.Column="0"
VerticalAlignment="Center"
HorizontalAlignment="Right"
Margin="10,0,0,0"
Content="State: "/>
<Label Grid.Row="5"
Grid.Column="1"
VerticalAlignment="Center"
HorizontalAlignment="Left"
Margin="10,0,0,0"
Content="{Binding State}"/>
<Label Grid.Row="6"
Grid.Column="0"
VerticalAlignment="Center"
HorizontalAlignment="Right"
Margin="10,0,0,0"
Content="Zip Code: "/>
<Label Grid.Row="6"
Grid.Column="1"
VerticalAlignment="Center"
HorizontalAlignment="Left"
Margin="10,0,0,0"
Content="{Binding ZipCode}"/>
</Grid>
</UserControl>
Now, I want to create a user control that contains a list of contacts defined in the ViewModel below:
public class ClientsListViewModel : ObservableObject
{
public ObservableCollection<ClientViewModel> Clients
{
get { return _clients; }
set { _clients = value; }
}
ObservableCollection<ClientViewModel> _clients = new ObservableCollection<ClientViewModel>();
public ClientsListViewModel()
{
ClientViewModel client = new ClientViewModel();
client.Customer.FirstName = "John";
client.Customer.LastName = "Doe";
client.Customer.PhoneNumber = "555-555-5555";
client.Customer.Address1 = "1234 Fake Street";
client.Customer.City = "Springfield";
_clients.Add(client);
}
}
And the View below:
<UserControl x:Class="LawnCareManager.Views.ClientsListView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:LawnCareManager.ViewModels"
xmlns:views="clr-namespace:LawnCareManager.Views"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<UserControl.DataContext>
<local:ClientsListViewModel/>
</UserControl.DataContext>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="1*"/>
</Grid.RowDefinitions>
<Label Content="Contacts"
Grid.Row="0"
Grid.Column="0"/>
<ListView Grid.Column="1" Grid.Row="2" Grid.ColumnSpan="2" ItemsSource="{Binding Clients}" x:Name="listView">
<ListView.ItemTemplate>
<DataTemplate>
<views:ClientView DataContext="{Binding}"/>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</Grid>
</UserControl>
The problem is that the ClientView ListViewItems in the ClientsListView are not binding correctly to the ObservableCollection of ClientViewModels. The correct number of ClientViews shows up in the list if I add more ClientViewModels, but none of the labels in the ClientView are populating.
Could somebody tell me what I'm doing wrong? Any feedback is greatly appreciated!

The issue here is that you are constructing the data context for client view within the InitializeComponent method. That's due to the static declaration in your Xaml. You can prove this empirically by adding this line of code to the ClientView constructor...
var dc = this.DataContext;
and observe that it gets created with null values at the "Wrong time".
If you change these lines in your ClientView.xaml...
<UserControl.DataContext>
<genericMvvm1:ClientViewModel/>
</UserControl.DataContext>
to this...
<!--<UserControl.DataContext>
<genericMvvm1:ClientViewModel/>
</UserControl.DataContext>-->
You will see your clients getting populated and displayed the way you were expecting. You'll need to change your design strategy to take account of the way InitializeComponent behaves, but this answer gets you 'unstuck'.