C# 在WPF中显示绘图.图像

我有一个System.Drawing.Image的实例

如何在我的WPF应用程序中显示这一点

---

我尝试了

img.Source

，但没有成功

要将图像加载到WPF图像控件，您需要System.Windows.Media.ImageSource

您需要将图形。图像对象转换为ImageSource对象：

 public static BitmapSource GetImageStream(Image myImage)
    {
        var bitmap = new Bitmap(myImage);
        IntPtr bmpPt = bitmap.GetHbitmap();
        BitmapSource bitmapSource =
         System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
               bmpPt,
               IntPtr.Zero,
               Int32Rect.Empty,
               BitmapSizeOptions.FromEmptyOptions());

        //freeze bitmapSource and clear memory to avoid memory leaks
        bitmapSource.Freeze();
        DeleteObject(bmpPt);

        return bitmapSource;
    }

DeleteObject方法的声明

[DllImport("gdi32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
internal static extern bool DeleteObject(IntPtr value);

---

我有同样的问题，并通过结合几个答案来解决它

System.Drawing.Bitmap bmp;
Image image;
...
using (var ms = new MemoryStream())
{
    bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
    ms.Position = 0;

    var bi = new BitmapImage();
    bi.BeginInit();
    bi.CacheOption = BitmapCacheOption.OnLoad;
    bi.StreamSource = ms;
    bi.EndInit();
}

image.Source = bi;
//bmp.Dispose(); //if bmp is not used further. Thanks @Peter

---

从

如果使用转换器，您实际上可以绑定到

图像

对象。您只需创建一个

IValueConverter

，将

图像

转换为

位图源

我在转换器中使用了AlexDrenea的示例代码来完成真正的工作

[ValueConversion(typeof(Image), typeof(BitmapSource))]
public class ImageToBitmapSourceConverter : IValueConverter
{
    [DllImport("gdi32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    internal static extern bool DeleteObject(IntPtr value);

    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        if (value is null || !(value is Image myImage))
        {//ensure provided value is valid image.
            return null;
        }

        if (myImage.Height > Int16.MaxValue || myImage.Width > Int16.MaxValue)
        {//GetHbitmap will fail if either dimension is larger than max short value.
            //Throwing here to reduce cpu and resource usage when error can be detected early.
            throw new ArgumentException($"Cannot convert System.Drawing.Image with either dimension greater than {Int16.MaxValue} to BitmapImage.\nProvided image's dimensions: {myImage.Width}x{myImage.Height}", nameof(value));
        }

        using Bitmap bitmap = new Bitmap(myImage); //ensure Bitmap is disposed of after usefulness is fulfilled.
        IntPtr bmpPt = bitmap.GetHbitmap();
        try
        {
            BitmapSource bitmapSource =
             System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
                   bmpPt,
                   IntPtr.Zero,
                   Int32Rect.Empty,
                   BitmapSizeOptions.FromEmptyOptions());

            //freeze bitmapSource and clear memory to avoid memory leaks
            bitmapSource.Freeze();
            return bitmapSource;
        }
        finally
        { //done in a finally block to ensure this memory is not leaked regardless of exceptions.
            DeleteObject(bmpPt);
        }
    }

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

在XAML中，需要添加转换器

<utils:ImageToBitmapSourceConverter x:Key="ImageConverter"/>

<Image Source="{Binding ThumbSmall, Converter={StaticResource ImageConverter}}"
                   Stretch="None"/>

可能相关：自包含的可能重复。我喜欢它不要忘记处理

bmp

。bmp在本例中用于什么？@juagicre要在WPF window.bmp位图的System.Drawing.Image中显示的任何格式正确的System.Drawing.Bitmap都应该初始化，不是吗？嗯，我猜这是在代码的“…”部分完成的：）@juagicre是的，它应该。在“…”中，确切地说，或者它应该来自函数外部等。