Question

我试图将缩略图添加到列表视图，但问题是没有任何内容显示。代码

System.Windows.Forms.OpenFileDialog open = new System.Windows.Forms.OpenFileDialog();
open.Filter = "Images (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|" + "All files (*.*)|*.*";
open.Title = "Add Slide Show Image";
open.ShowDialog();

BitmapImage logo = new BitmapImage();
logo.BeginInit();
logo.CacheOption = BitmapCacheOption.OnLoad;
logo.CreateOptions = BitmapCreateOptions.IgnoreImageCache;
logo.UriSource = new Uri(open.FileName);
logo.EndInit();


image.Add(logo);

listView1.ItemsSource = image;

listView1.Items.Refresh();

<ListView.ItemTemplate>
    <HierarchicalDataTemplate>
        <Border Padding="5,2,0,2">
            <StackPanel Width="289" Orientation="Horizontal"  >
                <Border CornerRadius="6" BorderThickness="4" Margin="0,0,4,0" Height="80" Width="80" Background="{x:Null}">
                    <Image  Stretch="Fill"  Source="{Binding image}" />
                    <Border.BorderBrush>
                        <LinearGradientBrush EndPoint="0.9,1" StartPoint="0.5,0">
                            <GradientStop Color="#FF00C4FF" Offset="1" />
                            <GradientStop Color="#FF093D5C" Offset="0.089" />
                        </LinearGradientBrush>
                    </Border.BorderBrush>
                </Border>
                <Border CornerRadius="6" BorderThickness="4" Margin="-85,0,4,0" Height="80" Width="80">
                    <Border.Background>
                        <LinearGradientBrush EndPoint="0.9,1.2" StartPoint="0.1,0">
                            <GradientStop Color="#4EFFFFFF" Offset="0" />
                            <GradientStop Color="#49FFFFFF" Offset="0.163" />
                            <GradientStop Color="Transparent" Offset="0.472" />
                            <GradientStop Color="#3DFFFFFF" Offset="0.457" />
                        </LinearGradientBrush>
                    </Border.Background>
                </Border>
                <CheckBox Content="{Binding Name}" IsChecked="{Binding IsChecked}" VerticalAlignment="Center" />
            </StackPanel>
        </Border>
    </HierarchicalDataTemplate>
</ListView.ItemTemplate>

A screenshot

Answer 1

如果image（在您的代码中）是一个集合，那么您已经创建了一个BitmapImage个对象的集合。您的模板会绑定到image，Name和IsChecked属性，这些属性都不是BitmapImage类的属性。

您可能想要在您的视图模型类中创建Image属性（具有Name和IsChecked属性的属性），设置{{ 1}}在每个对象上，然后将模板中的Image属性绑定到对象中的Source属性。

Answer 2

创建一个类

 class MyImages
    {
        public BitmapImage image {get;set;}
        public  String Name {get;set;}
        public bool IsChecked  {get;set;}
    }

现在创建一个List<MyImages> myImages = new List<MyImages>();

BitmapImage logo = new BitmapImage();
logo.BeginInit();
logo.CacheOption = BitmapCacheOption.OnLoad;
logo.CreateOptions = BitmapCreateOptions.IgnoreImageCache;
logo.UriSource = new Uri(open.FileName);
logo.EndInit();

myImages.Add(new MyImage(){image = logo, Name = "SomeName", IsChecked = true });

listView1.ItemsSource = myImages;
listView1.Items.Refresh();

将缩略图添加到列表视图

2 个答案: