C# 如何使用C中的WPF从多个导入的图像制作图像拼贴？

我需要导入多个图像，并在一个图像中处理它们，就像拼贴一样。我只需要简单的工具，如翻译图像、旋转图像等

Im在学习mvvm的过程中，大部分视图都是做出来的。我不知道如何将导入的图像添加到一个画布。是否有某种内置的图像类可以使用？或者我可以从哪个图书馆开始

现在我可以将图像导入列表。

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我的目标是能够将所选图像添加到画布上，并在画布上操作该图像，然后导出/保存该图像。

然而，您看到的内容太广泛，无法回答，但这里有一个小示例

xaml

代码隐藏

    private void canvas_MouseDown(object sender, MouseButtonEventArgs e)
    {
        Random rand = new Random(DateTime.Now.Millisecond);
        var uriSource = new Uri(@"desert.jpg", UriKind.Relative);
        for (int i = 0; i < 10; i++)
        {
            Image img = new Image();
            img.Width = rand.NextDouble() * 200;
            img.Height = rand.NextDouble() * 200;
            img.Stretch= Stretch.UniformToFill;
            img.Source = new BitmapImage(uriSource);
            img.RenderTransform = new RotateTransform(rand.NextDouble() * 360);
            Canvas.SetLeft(img, (rand.NextDouble() * canvas.ActualWidth));
            Canvas.SetTop(img, (rand.NextDouble() * canvas.ActualHeight));
            canvas.Children.Add(img);
        }
    }

结果

以上内容也可以通过MVVM的方式完成，如果您也希望看到，请告诉我

MVVM方法

下面是通过MVVM对上述代码的复制

xaml

通过向模板添加更多细节，我增强了视图

视图模型、模型和转换器类

namespace CSharpWPF
{
    class ViewModel : DependencyObject
    {
        public ViewModel()
        {
            Images = new ObservableCollection<CollageImage>();
            GenerateCollage();
        }
        public ObservableCollection<CollageImage> Images { get; private set; }

        public void GenerateCollage()
        {
            Random rand = new Random(DateTime.Now.Millisecond);
            var uriSource = new Uri(@"desert.jpg", UriKind.Relative);
            for (int i = 0; i < 10; i++)
            {
                CollageImage img = new CollageImage();
                img.Left = (0.2 + rand.NextDouble()) % 0.8;
                img.Top = (0.2 + rand.NextDouble()) % 0.8;
                img.Width = 100 + rand.NextDouble() * 100;
                img.Height = 100 + rand.NextDouble() * 100;
                img.Image = "desert.jpg";
                img.Angle = rand.NextDouble() * 360;
                Images.Add(img);
            }
        }
    }

    class CollageImage
    {
        public string Image { get; set; }
        public double Left { get; set; }
        public double Top { get; set; }
        public double Width { get; set; }
        public double Height { get; set; }
        public double Angle { get; set; }
    }

    class ImageLocationConverter : IMultiValueConverter
    {
        public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            double value = (double)values[0];
            double max = (double)values[1];

            return value * max;
        }

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}

结果

---

正是我要找的。了解您的mvvm方法将非常有帮助。

<Grid>
    <Grid.Resources>
        <l:ViewModel x:Key="viewModel" />
        <l:ImageLocationConverter x:Key="ImageLocationConverter" />
        <Style TargetType="ContentPresenter">
            <Setter Property="Canvas.Left">
                <Setter.Value>
                    <MultiBinding Converter="{StaticResource ImageLocationConverter}">
                        <Binding Path="Left" />
                        <Binding Path="ActualWidth"
                                 RelativeSource="{RelativeSource FindAncestor,AncestorType=Canvas}" />
                    </MultiBinding>
                </Setter.Value>
            </Setter>
            <Setter Property="Canvas.Top">
                <Setter.Value>
                    <MultiBinding Converter="{StaticResource ImageLocationConverter}">
                        <Binding Path="Top" />
                        <Binding Path="ActualHeight"
                                 RelativeSource="{RelativeSource FindAncestor,AncestorType=Canvas}" />
                    </MultiBinding>
                </Setter.Value>
            </Setter>
        </Style>
    </Grid.Resources>
    <ItemsControl ItemsSource="{Binding Images,Source={StaticResource viewModel}}">
        <ItemsControl.ItemsPanel>
            <ItemsPanelTemplate>
                <Canvas />
            </ItemsPanelTemplate>
        </ItemsControl.ItemsPanel>
        <ItemsControl.ItemTemplate>
            <DataTemplate>
                <Grid>
                    <Border BorderBrush="White"
                            BorderThickness="5">
                        <Image Source="{Binding Image}"
                               Width="{Binding Width}"
                               Height="{Binding Height}"
                               Stretch="UniformToFill">
                        </Image>
                        <Border.RenderTransform>
                            <RotateTransform Angle="{Binding Angle}" />
                        </Border.RenderTransform>
                    </Border>
                    <Grid.Effect>
                        <DropShadowEffect Opacity=".5"
                                          BlurRadius="10" />
                    </Grid.Effect>
                </Grid>
            </DataTemplate>
        </ItemsControl.ItemTemplate>
    </ItemsControl>
</Grid>

namespace CSharpWPF
{
    class ViewModel : DependencyObject
    {
        public ViewModel()
        {
            Images = new ObservableCollection<CollageImage>();
            GenerateCollage();
        }
        public ObservableCollection<CollageImage> Images { get; private set; }

        public void GenerateCollage()
        {
            Random rand = new Random(DateTime.Now.Millisecond);
            var uriSource = new Uri(@"desert.jpg", UriKind.Relative);
            for (int i = 0; i < 10; i++)
            {
                CollageImage img = new CollageImage();
                img.Left = (0.2 + rand.NextDouble()) % 0.8;
                img.Top = (0.2 + rand.NextDouble()) % 0.8;
                img.Width = 100 + rand.NextDouble() * 100;
                img.Height = 100 + rand.NextDouble() * 100;
                img.Image = "desert.jpg";
                img.Angle = rand.NextDouble() * 360;
                Images.Add(img);
            }
        }
    }

    class CollageImage
    {
        public string Image { get; set; }
        public double Left { get; set; }
        public double Top { get; set; }
        public double Width { get; set; }
        public double Height { get; set; }
        public double Angle { get; set; }
    }

    class ImageLocationConverter : IMultiValueConverter
    {
        public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            double value = (double)values[0];
            double max = (double)values[1];

            return value * max;
        }

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}