C# 位图帧解码为图像 最近，我决定玩Windows演示文稿基金会，并创建一个棋棋。整个事情已经完成了（我相信），但现在已经很长时间了，因为我找不到一种方法将我的PNG文件设置为图像控件。这是受问题影响的示例类： public class Field { public Image Image { get; set; } public Image GetImage(String keyName) { ResourceDictionary imagesDictionary = new ResourceDictionary(); imagesDictionary.Source = new Uri("file:/[...]/ImagesDictionary.xaml"); var var = imagesDictionary[keyName]; Image image = (Image) imagesDictionary[keyName]; return image; } public void RefreshImage() { if (Unit.Subclass.CompareTo("Bishop").Equals(0)) { if (Unit.Player.IsWhite) { this.Image = this.GetImage("WhiteBishop"); } ... } }

My ImagesDictionary.xaml文件：

<ResourceDictionary>
    <ImageSource x:Key="BlackBishop">BlackBishop.png</ImageSource>
    <ImageSource x:Key="WhiteBishop">WhiteBishop.png</ImageSource>
    ...
</ResourceDictionary>

blackishop.png
WhiteBishop.png
...

问题是我不知道如何转换GetImage的输出

（System.Windows.Media.Imaging.BitmapFrameDecode）

进入

（System.Windows.Controls.Image）

---

有什么想法吗？

System.Windows.Media.Imaging.BitmapFrame源自ImageSource

您应该能够做到这一点：

this.Image = new Image();
this.Image.Source = this.GetImage("WhiteBishop");

或

如果BitmapFrameDecode确实来自System.Windows.Imaging.Image，而不是来自ImageSource

---

-Jesse

好的，下面是一个改进的GetImageSource（更改名称以反映其真正用途）

Drawing.Image

案例将处理BMP、PNG、JPG、GIF等，即使我使用了

BmpBitmapDecoder

。但是请注意，XAML图像的拉伸非常漂亮，但是

Drawing.Image

-Jesse

将img设置为新位图图像
使用mem作为新的System.IO.MemoryStream（）使用
img.BeginInit（）
img.StreamSource=mem
img.EndInit（）
终端使用
返回img

它以一种没有错误的方式工作。。。但是，即使设置了源代码集，图像控件也不会显示任何内容。。。但是谢谢，我还需要调试一些Szymon遇到了一个可能是问题所在的弱点。如果您正在更新的图像恰好是一个UI元素，并且您将其设置为null，则其与其父级的链接将丢失。始终设置mage.Source，以便上面的对象关系不会丢失。@Szymon您有机会尝试此

Drawing.Image

转换代码吗？

this.Image.Source = this.GetImage("WhiteBishop").Source;

    /// <summary>
    /// Get an ImageSource from the ResourceDictionary  referred to by the
    ///     <paramref name="uriDictionary"/>.
    /// </summary>
    /// <param name="keyName">The ResourceDictionary key of the ImageSource
    ///     to retrieve.</param>
    /// <param name="uriDictionary">The Uri to the XAML file that holds
    ///     the ResourceDictionary.</param>
    /// <returns><c>null</c> on failure, the requested <c>ImageSource</c>
    ///     on success.</returns>
    /// <remarks>If the requested resource is an <c>Image</c> instead of
    ///     an <c>ImageSource</c>,
    /// then the <c>image.Source</c> is returned.</remarks>
    public static ImageSource GetImageSource(String keyName, Uri uriDictionary)
    {
        if (String.IsNullOrEmpty(keyName))
            throw new ArgumentNullException("keyName");
        if (null == uriDictionary)
            throw new ArgumentNullException("uriDictionary");

        ResourceDictionary imagesDictionary = new ResourceDictionary();
        imagesDictionary.Source = uriDictionary;
        var var = imagesDictionary[keyName];
        Object blob = imagesDictionary[keyName];
        Debug.WriteLine(String.Format(
            "error: GetImageSource( '{0}', '{1}' )"
            + " value is: {2}",
            keyName,
            uriDictionary,
            (null == blob) ? "null" : blob.GetType().FullName));
        if (null != blob)
        {
            if (blob is ImageSource)
            {
                return blob as ImageSource;
            }
            if (blob is Image)
            {
                Image image = blob as Image;
                return image.Source;
            }
            if (blob is System.Drawing.Image)
            {
                System.Drawing.Image dImage = blob as System.Drawing.Image;
                MemoryStream mem = new MemoryStream();
                dImage.Save(mem, System.Drawing.Imaging.ImageFormat.MemoryBmp);
                mem.Position = 0;
                BitmapDecoder decode = new BmpBitmapDecoder(
                    mem,
                    BitmapCreateOptions.None,
                    BitmapCacheOption.None);
                return decode.Frames[0];
            }
            Debug.WriteLine(String.Format(
                "error: GetImageSource( '{0}', '{1}' )"
                + " can't handle type: {2}",
                keyName,
                uriDictionary,
                blob.GetType().FullName));
        }
        return null;
    }

String packText = String.Format("pack://application:,,,/{0};component/{1}",
    Assembly.GetEntryAssembly().FullName,
    "ImageDictionary.xaml");
Uri imageUri = new Uri(packText);
// or if you prefer:
// Uri imageUri = new Uri("file:///.../ImageDictionary.xaml");
//

ImageSource source = GetImageSource(imageKey, imageUri);

if (null != source)
{
    this.Image.Source = source;
}
else
{
    // bail ...
}

Dim img As New BitmapImage

Using mem As New System.IO.MemoryStream(<InputArrayHere>)
    img.BeginInit()
    img.StreamSource = mem
    img.EndInit()
End Using

return img