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我正在开发一个 Windows Phone 7.5 应用程序。我有一个在我的几个应用程序页面中使用的自定义标签栏。我为此标签栏创建了一个带有 3 个按钮的自定义控件。

  1. 我已经定义了 3 个 ImageSource 类型的 DependencyProperties 来从我实际使用 Tabbar 控件的主页设置按钮的背景。

  2. 这 3 个 DependencyProperties 绑定到我的自定义控件 xaml 中 3 个按钮的 ImageSource 属性

  3. 然后我从我完全使用底部标签栏控件的主页设置这些属性。

问题是图像可以在视觉工作室设计器上看到，但不能在模拟器上看到。模拟器显示黑色按钮。

下面是我的标签栏控件的 BottomTabBar.xaml：

<UserControl x:Class="SafeCell.Views.BottomTabBar"
    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"
    mc:Ignorable="d"             
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"    
    d:DesignHeight="100" d:DesignWidth="480">

    <Grid x:Name="BottomTabBarGrid" Width="{Binding DesignWidth}" Height="{Binding DesignHeight}" Background="Black">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="417*" />
            <ColumnDefinition Width="63*" />
        </Grid.ColumnDefinitions>
        <TextBlock Width="Auto" Text="{Binding Text}"></TextBlock>
        <Button Command="{Binding HomeButtoncommand}"   x:Name="home"  Height="125" Width="194"  HorizontalAlignment="Left" Margin="-11,-12,0,0" VerticalAlignment="Top">
            <Button.Background >
                <ImageBrush ImageSource="{Binding HomeButtonImage}" Stretch="Fill" />
            </Button.Background>
        </Button>
        <Button Command="{Binding TripButtoncommand}"  x:Name="trips" Width="172"  HorizontalAlignment="Right" Margin="0,-12,85,-13" >
            <Button.Background>
                <ImageBrush ImageSource="{Binding TripButtonImage}"  AlignmentX="Center" Stretch="Fill"/>
            </Button.Background>
        </Button>
        <Button Command="{Binding RulesButtoncommand}"   x:Name="rules" Width="183" HorizontalAlignment="Right" Grid.ColumnSpan="2" Margin="0,-12,-12,-13">
            <Button.Background>
                <ImageBrush ImageSource="{Binding RulesButtonImage}"  />
            </Button.Background>
        </Button>
    </Grid>
</UserControl>

下面是我的标签栏控件的 BottomTabBar.xaml.cs：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.ComponentModel;
using System.Windows.Data;
using System.Windows.Media.Imaging;

namespace SafeCell.Views
{
    public partial class BottomTabBar : UserControl,INotifyPropertyChanged
    {


        /// <summary>
        /// Command Dependency Property
        /// </summary>
        private static  DependencyProperty  mTripButtonImage=  DependencyProperty.Register("TripButtonImage", typeof(ImageSource), typeof(BottomTabBar),new PropertyMetadata(null));
        public  ImageSource TripButtonImage
        {
             get
            {

                return (ImageSource)GetValue(mTripButtonImage);
            }
             set
            {
                SetValue(mTripButtonImage, value);                
               NotifyPropertyChanged("TripButtonImage");
            }
        }

        /// <summary>
        /// Command Dependency Property
        /// </summary>
        private static DependencyProperty mHomeButtonImage = DependencyProperty.Register("HomeButtonImage", typeof(ImageSource), typeof(BottomTabBar), new PropertyMetadata(null));
        public ImageSource HomeButtonImage
        {
            get
            {

                return (ImageSource)GetValue(mHomeButtonImage);
            }
            set
            {
                SetValue(mHomeButtonImage, value);
                NotifyPropertyChanged("HomeButtonImage");
            }
        }

        /// <summary>
        /// Command Dependency Property
        /// </summary>
        private static DependencyProperty mRulesButtonImage = DependencyProperty.Register("RulesButtonImage", typeof(ImageSource), typeof(BottomTabBar), new PropertyMetadata(null));
        public ImageSource RulesButtonImage
        {
            get
            {

                return (ImageSource)GetValue(mRulesButtonImage);
            }
            set
            {
                SetValue(mRulesButtonImage, value);
                NotifyPropertyChanged("RulesButtonImage");
            }
        }


        /// <summary>
        /// Command Dependency Property
        /// </summary>
        public static readonly DependencyProperty mTripButtoncommand =
            DependencyProperty.Register("TripButtoncommand", typeof(ICommand), typeof(BottomTabBar),
                new PropertyMetadata(null));
        public ICommand TripButtoncommand
        {
            get
            {
                return (ICommand)GetValue(mTripButtoncommand);
            }
            private set
            {
                SetValue(mTripButtoncommand, value);
              //  NotifyPropertyChanged("TripButtoncommand");
            }
        }


        /// <summary>
        /// Command Dependency Property
        /// </summary>
        public static readonly DependencyProperty mHomeButtoncommand =
            DependencyProperty.Register("HomeButtoncommand", typeof(ICommand), typeof(BottomTabBar),
                new PropertyMetadata(null));

        public ICommand HomeButtoncommand
        {
            get
            {
                return (ICommand)GetValue(mHomeButtoncommand);
            }
            private set
            {
                SetValue(mHomeButtoncommand, value);
               // NotifyPropertyChanged("HomeButtoncommand");
            }
        }

        /// <summary>
        /// Command Dependency Property
        /// </summary>
        public static readonly DependencyProperty mRulesButtoncommand =
            DependencyProperty.Register("RulesButtoncommand", typeof(ICommand), typeof(BottomTabBar),
                new PropertyMetadata(null));
        public ICommand RulesButtoncommand
        {
            get
            {
                return (ICommand)GetValue(mRulesButtoncommand);
            }
            private set
            {
                SetValue(mRulesButtoncommand, value);
               // NotifyPropertyChanged("RulesButtoncommand");
            }
        }

       // ImageBrush mTripActiveImage;
        //ImageBrush mTripInActiveImage;

        //ImageBrush mHomeActiveImage;
        ///ImageBrush mHomeInActiveImage;


        //ImageBrush mRulesActiveImage;
        //ImageBrush mRulesInActiveImage;

        public BottomTabBar()
        {
            try
            {
                InitializeComponent();
                BottomTabBarGrid.DataContext = this;

                //if (mTripActiveImage == null)
                //{
                //    mTripActiveImage = new ImageBrush();
                //    mTripInActiveImage = new ImageBrush();
                 //   mTripActiveImage.ImageSource = new BitmapImage(new Uri("/SafeCell;component/ImgResources/menu-my-trip-active.png", UriKind.RelativeOrAbsolute));
                //    mTripInActiveImage.ImageSource = new BitmapImage(new Uri("/SafeCell;component/ImgResources/menu-my-trip.png", UriKind.RelativeOrAbsolute));
                //}
                //if (mHomeActiveImage == null)
                //{
                //    mHomeActiveImage = new ImageBrush();
                //    mHomeInActiveImage = new ImageBrush();
                //    mHomeActiveImage.ImageSource = new BitmapImage(new Uri("/SafeCell;component/ImgResources/menu-home-active.png", UriKind.RelativeOrAbsolute));
                //    mHomeInActiveImage.ImageSource = new BitmapImage(new Uri("/SafeCell;component/ImgResources/menu-home.png", UriKind.RelativeOrAbsolute));
                //}
                //if (mRulesActiveImage == null)
                //{
                //    mRulesActiveImage = new ImageBrush();
                //    mRulesInActiveImage = new ImageBrush();
                //    mRulesActiveImage.ImageSource = new BitmapImage(new Uri("/SafeCell;component/ImgResources/menu-rules-active.png", UriKind.RelativeOrAbsolute));
                //    mRulesInActiveImage.ImageSource = new BitmapImage(new Uri("/SafeCell;component/ImgResources/menu-rules.png", UriKind.RelativeOrAbsolute));
                //}
                //ImageBrush imageBrush = new ImageBrush();
                //Uri uri = new Uri("/SafeCell;component/ImgResources/menu-my-trip-active.png", UriKind.RelativeOrAbsolute);
                //imageBrush.ImageSource = new BitmapImage(uri);
                //this.myTrip.Background = imageBrush;        

               // trips.Click += new RoutedEventHandler(trips_Click);
            }
            catch (Exception ex)
            {


            }

        }

        void trips_Click(object sender, RoutedEventArgs e)
        {
          //  trips.Background = mTripActiveImage;
           // home.Background = mHomeInActiveImage;
           // rules.Background = mRulesInActiveImage;

        }


        public event PropertyChangedEventHandler PropertyChanged;
        protected void NotifyPropertyChanged(String propertyName)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (null != handler)
            {
                handler(this, new PropertyChangedEventArgs(propertyName));
            }
        }

    }
}

...以下是我在页面中使用此控件的方式：

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="0,0,0,0" Background="White">
    <TextBlock Name="locationLabel"  Margin="0,0,0,0" FontSize="16" FontWeight="Black"  Text="Gurgaon,Haryana" Foreground="Black"></TextBlock>

    <TabBar:BottomTabBar HomeButtonImage ="/SafeCell;component/ImgResources/menu-home.png"  RulesButtonImage="/SafeCell;component/ImgResources/menu-rules.png"  TripButtonImage="/SafeCell;component/ImgResources/menu-my-trip.png" RulesButtoncommand="{Binding AppRulesTabCmd}"  HomeButtoncommand="{Binding AppHomeTabCmd}"  TripButtoncommand="{Binding AppTripsTabCmd}"  Height="76" VerticalAlignment="Bottom" ></TabBar:BottomTabBar>
</Grid>
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