БЛОГ НА HUSL


Не отображаются данные WPF

Автор вопроса: Dima

Есть окно приложения, где используется MVVM, но данные не отображаются. Выглядит это так: HomeViewModel DViewModel Подскажите, пожалуйста, почему данные не отображаются во вкладках?

Структура: App.xaml

<Application x:Class="ohb.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:ohb"
         xmlns:viewModel="clr-namespace:ohb.MVVM.ViewModel"
             xmlns:view="clr-namespace:ohb.MVVM.View"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
         <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="Theme/MenuButtonTheme.xaml"/>
                    <ResourceDictionary Source="Theme/TextBoxTheme.xaml"/>
        </ResourceDictionary.MergedDictionaries>

            <DataTemplate DataType="{x:Type viewModel:HomeViewModel}">
                <view:HomeView/>
            </DataTemplate>
        </ResourceDictionary>
    </Application.Resources>
</Application>

MainWindow.xaml

<Window x:Class="ohb.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:ohb"
    xmlns:viewModel="clr-namespace:ohb.MVVM.ViewModel"
        xmlns:view="clr-namespace:ohb.MVVM.View"
        mc:Ignorable="d"
        Height="600" Width="920"
    WindowStyle="None"
    ResizeMode="NoResize"
    Background="Transparent"
    AllowsTransparency="True"
    MouseMove="WindowMouseMoving">


<Window.DataContext>
        <viewModel:MainViewModel/>
</Window.DataContext>
          
    <Border Background="#2f4f4f"
        CornerRadius="30">
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="200"/>
                <ColumnDefinition/>
            </Grid.ColumnDefinitions>

            <Grid.RowDefinitions>
                <RowDefinition Height="75"/>
                <RowDefinition/>
            </Grid.RowDefinitions>

        <TextBlock Text="Application"
            VerticalAlignment="Center"
            HorizontalAlignment="Left"
            Foreground="White"
            FontSize="22"
            Margin="20,0,0,0"/>

        <StackPanel Grid.Row="1">


            <RadioButton Content="Home"
                Height="50"
                Foreground="White"
                FontSize="14"
                Style="{StaticResource MenuButtonTheme}"
                IsChecked="True"
                Command="{Binding HomeViewCommand}"/>

            <RadioButton Content="Menu"
                Height="50"
                Foreground="White"
                FontSize="14"
                Style="{StaticResource MenuButtonTheme}"
                Command="{Binding DViewCommand}"/>

            <RadioButton Content="Settings"
                Height="50"
                Foreground="White"
                FontSize="14"
                Style="{StaticResource MenuButtonTheme}"/>

            <RadioButton Content="Exit"
                Click="CloseButtonClick"
                Height="50"
                Foreground="White"
                FontSize="14"
                        Style="{StaticResource MenuButtonTheme}"/>

        </StackPanel>

            <TextBox Width="250"
                 Height="40"
                 VerticalContentAlignment="Center"
                 HorizontalAlignment="Left"
                 Margin="5"
                 Grid.Column="1"
                 Style="{StaticResource TextBoxTheme}"/>

            <ContentControl Grid.Row="1"
                    Grid.Column="1"
                    Margin="10"
                    Content="{Binding CurrentView}"/>

        </Grid>
    </Border>
</Window>

MainWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using ohb.MVVM.ViewModel;

namespace ohb
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
 
        }


    // Moveable window
        private void WindowMouseMoving(object sender, MouseEventArgs e)
        {
            if (e.LeftButton == MouseButtonState.Pressed)
            {
                this.DragMove();
            }
        }
  
    // Exit button
    private void CloseButtonClick(object sender, RoutedEventArgs e)
    {
            Close();
    }
    }
}

\Core

ObservableObject.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.ComponentModel;
using System.Runtime.CompilerServices;

namespace ohb.Core
{

    class ObservableObject : INotifyPropertyChanged

    {
public event PropertyChangedEventHandler PropertyChanged;

protected void OnPropertyChanged([CallerMemberName] string name = null)
        
        {
            if (PropertyChanged != null)
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));

        } 


    }

}

RelayCommand.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;

namespace ohb.Core
{
    public class RelayCommand : ICommand
    {
        private Action<object> execute;
        private Func<object, bool> canExecute;
 
        public event EventHandler CanExecuteChanged
        {
            add { CommandManager.RequerySuggested += value; }
            remove { CommandManager.RequerySuggested -= value; }
        }
 
        public RelayCommand(Action<object> execute, Func<object, bool> canExecute = null)
        {
            this.execute = execute;
            this.canExecute = canExecute;
        }
 
        public bool CanExecute(object parameter)
        {
            return this.canExecute == null || this.canExecute(parameter);
        }
 
        public void Execute(object parameter)
        {
            this.execute(parameter);
        }
    }
}

\MVVM\ViewModel

MainViewModel.cs

using System;
using ohb.Core;

namespace ohb.MVVM.ViewModel
{
    class MainViewModel : ObservableObject
    {
        
        public RelayCommand HomeViewCommand { get; set; }
        public RelayCommand DViewCommand { get; set; }


        public HomeViewModel HomeVM { get; set; }
        public DViewModel DVM { get; set; }

              
        private object _currentView;

        public object CurrentView 
        {
            get { return _currentView; } 
            set
            {
                _currentView = value;
                OnPropertyChanged();
            }
        }
        

        public MainViewModel()
        {
            HomeVM = new HomeViewModel();
            DVM = new DViewModel();
            
            CurrentView = HomeVM;
            

            HomeViewCommand = new RelayCommand(o =>
            {
                CurrentView = HomeVM;
            });

            DViewCommand = new RelayCommand(o =>
            {
                CurrentView = DVM;
            });
            
        }
    }
}

HomeViewModel.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ohb.Core;

namespace ohb.MVVM.ViewModel
{
    class HomeViewModel
    {

    }
}

DViewModel.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ohb.Core;
using ohb.MVVM.ViewModel;

namespace ohb.MVVM.ViewModel
{
    class DViewModel
    {

    }
}

\MVVM\View

DView.xaml

<UserControl x:Class="ohb.MVVM.View.DView"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:viewModel="clr-namespace:ohb.MVVM.ViewModel"
        xmlns:view="clr-namespace:ohb.MVVM.View"
    mc:Ignorable="d"
    d:DesignHeight="400" d:DesignWidth="400">

<StackPanel>
    <TextBlock Text="Discovery"/>
</StackPanel>
</UserControl>

HomeView.xaml

<UserControl x:Class="ohb.MVVM.View.HomeView"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:viewModel="clr-namespace:ohb.MVVM.ViewModel"
        xmlns:view="clr-namespace:ohb.MVVM.View"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="300">

<StackPanel>
    <TextBlock Text="Discover"
    Foreground="White"
    FontSize="28"
    HorizontalAlignment="Left"
    Margin="0,0,0,20"/>

    <StackPanel Orientation="Horizontal">
        <Border Width="100"
            Height="150">

        <Border.Background>
            <LinearGradientBrush StartPoint="0,0" EndPoint="1,2">
            <GradientStop Color="#5bc3ff" Offset="0"/>
            <GradientStop Color="#3aa0ff" Offset="1"/>
            </LinearGradientBrush>
        </Border.Background>

        <Border.Clip>
            <RectangleGeometry RadiusX="10"
                       RadiusY="10"
                       Rect="0,0,400,200"/>
        </Border.Clip>

        <Grid>
            <StackPanel>
            <TextBlock Text="World leader&#x0a;in global"
                   Foreground="White"
                   FontSize="28"
                   Margin="20,10,10,0"/>

            <TextBlock Text="Get started"
                   Foreground="White"
                   FontSize="18"
                   Margin="20,10,10,0"/>
            </StackPanel>

            <Image Width="80"
               Height="80"
               Source="/Images/animal.png"
               HorizontalAlignment="Right"
               VerticalAlignment="Bottom" Margin="5">
            </Image>


        </Grid>

        </Border>   

<Border Width="100" 
    Height="100"
    CornerRadius="10"
    Margin="45,0,0,0">

        <Border.Background>
            <LinearGradientBrush StartPoint="0,0" EndPoint="1,2">
            <GradientStop Color="#5bc3ff" Offset="0"/>
            <GradientStop Color="#3aa0ff" Offset="1"/>
            </LinearGradientBrush>
        </Border.Background>

</Border>

    </StackPanel>
</StackPanel>
</UserControl>

\Theme

MenuButtonTheme.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Style BasedOn="{StaticResource {x:Type ToggleButton}}"
           TargetType="{x:Type RadioButton}"
           x:Key="MenuButtonTheme"> 
        <Style.Setters> 
            <Setter Property="Template">
                <Setter.Value>
                  
                    <ControlTemplate TargetType="RadioButton">
                        <Grid VerticalAlignment="Stretch"
                              HorizontalAlignment="Stretch"
                              Background="{TemplateBinding Background}">

              
                            <TextBlock Text="{TemplateBinding Property=Content}"
                                       VerticalAlignment="Center"
                                       Margin="50,0,0,0"/>
                        </Grid>
                        </ControlTemplate>
                </Setter.Value>
            </Setter>

                  <Setter Property="Background" Value="Transparent"/>
            <Setter Property="BorderThickness" Value="0"/>
        </Style.Setters>
        
        <Style.Triggers>
            <Trigger Property="IsChecked" Value="True">
                <Setter Property="Background" Value="#3b6363"/>
            </Trigger>
        </Style.Triggers>

    </Style>
</ResourceDictionary>

TextBoxTheme.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Style TargetType="{x:Type TextBox}"
           x:Key="TextBoxTheme">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type TextBox}">
                    <Border CornerRadius="10"
                Background="#3b6363"
                Width="200" Height="40">

                        <Grid>
                <Rectangle StrokeThickness="1"/>
                            <TextBox Margin="1"
                     BorderThickness="0"
                                     Background="Transparent"
                                     VerticalContentAlignment="Center"
                                     Padding="5"
                                     Foreground="White"
                     x:Name="SearchBox"/>

                <TextBlock IsHitTestVisible="False"
                Text="Search"
                VerticalAlignment="Center"
                HorizontalAlignment="Left"
                Margin="10,0,0,0"
                Foreground="DarkGray"
                Grid.Column="1"
                FontSize="12">

                <TextBlock.Style>
                    <Style TargetType="{x:Type TextBlock}">
                    <Style.Triggers>
                <DataTrigger Binding="{Binding Text, ElementName=SearchBox}" Value="">
                    <Setter Property="Visibility" Value="Visible"/>
                </DataTrigger>
                    </Style.Triggers>
                    <Setter Property="Visibility" Value="Hidden"/>
                    </Style>
                </TextBlock.Style>

                </TextBlock>

                        </Grid>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>

Источник

Ответы (0 шт):

licensed under cc by-sa 3.0 with attribution.