C# 能否将System.Windows.Control.Image转换为System.Drawing.Icon？

问题的标题大致说明了问题所在。有可能吗？

几个月前我们遇到了这个问题，我们找到了这个解决方案

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我很高兴我们在评论中提到了我们发现的东西。我更喜欢将此文件发送给您，而不是我的代码，因为它与get multiple zipped文件合并，这会使您真正想要的内容变得复杂。

我修改了中的一个示例。这似乎很有效

    public static Icon Convert(BitmapImage bitmapImage)
    {
        System.Drawing.Bitmap bitmap = null;
        var width = bitmapImage.PixelWidth;
        var height = bitmapImage.PixelHeight;
        var stride = width * ((bitmapImage.Format.BitsPerPixel + 7) / 8);

        var bits = new byte[height * stride];

        bitmapImage.CopyPixels(bits, stride, 0);

        unsafe
        {
            fixed (byte* pB = bits)
            {
                var ptr = new IntPtr(pB);

                bitmap = new System.Drawing.Bitmap(width, height, stride,
                                                System.Drawing.Imaging.PixelFormat.Format32bppPArgb,
                                                ptr);
            }

        }

        return Icon.FromHandle(bitmap.GetHicon());
    }

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作为替代方案，我使用了发现的提示：

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我根据您的代码创建了一个WPF XAML IValueConverter类，该类将带有图像的byte（）数组转换为图标，代码如下：

Public Class ByteArrayToIconConverter
Implements IValueConverter

' Define the Convert method to change a byte[] to icon.
Public Function Convert(ByVal value As Object, _
    ByVal targetType As Type, ByVal parameter As Object, _
    ByVal culture As System.Globalization.CultureInfo) As Object _
    Implements System.Windows.Data.IValueConverter.Convert

    If Not value Is Nothing Then
        ' value is the data from the source object.
        Dim data() As Byte = CType(value, Byte())
        Dim ms1 As MemoryStream = New MemoryStream(data)
        Dim ms2 As MemoryStream = New MemoryStream()

        Dim img As New BitmapImage()

        img.BeginInit()
        img.StreamSource = ms1
        img.EndInit()

        Dim encoder As New PngBitmapEncoder()  
        encoder.Frames.Add(BitmapFrame.Create(img))
        encoder.Save(ms2)

        Dim bmp As New Bitmap(ms2)
        Dim newIcon As Icon = Icon.FromHandle(bmp.GetHicon())

        Return newIcon

    End If


End Function

' ConvertBack is not implemented for a OneWay binding.
Public Function ConvertBack(ByVal value As Object, _
    ByVal targetType As Type, ByVal parameter As Object, _
    ByVal culture As System.Globalization.CultureInfo) As Object _
    Implements System.Windows.Data.IValueConverter.ConvertBack

    Throw New NotImplementedException

End Function
End Class

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这会将System.Drawing.Image转换为System.Drawing.Icon。我正在尝试将System.Windows.Control.Image转换为System.Drawing.Icon。谢谢！这个答案对我帮助很大。但当我将图像分配给picturebox，然后调整框的大小时，我发现了一个问题。我的解决方案是将图像重新绘制成一个新的位图，这样我就不再需要不安全的数组了。这泄露了Hicon把手这泄露了Hicon把手。

Public Class ByteArrayToIconConverter
Implements IValueConverter

' Define the Convert method to change a byte[] to icon.
Public Function Convert(ByVal value As Object, _
    ByVal targetType As Type, ByVal parameter As Object, _
    ByVal culture As System.Globalization.CultureInfo) As Object _
    Implements System.Windows.Data.IValueConverter.Convert

    If Not value Is Nothing Then
        ' value is the data from the source object.
        Dim data() As Byte = CType(value, Byte())
        Dim ms1 As MemoryStream = New MemoryStream(data)
        Dim ms2 As MemoryStream = New MemoryStream()

        Dim img As New BitmapImage()

        img.BeginInit()
        img.StreamSource = ms1
        img.EndInit()

        Dim encoder As New PngBitmapEncoder()  
        encoder.Frames.Add(BitmapFrame.Create(img))
        encoder.Save(ms2)

        Dim bmp As New Bitmap(ms2)
        Dim newIcon As Icon = Icon.FromHandle(bmp.GetHicon())

        Return newIcon

    End If


End Function

' ConvertBack is not implemented for a OneWay binding.
Public Function ConvertBack(ByVal value As Object, _
    ByVal targetType As Type, ByVal parameter As Object, _
    ByVal culture As System.Globalization.CultureInfo) As Object _
    Implements System.Windows.Data.IValueConverter.ConvertBack

    Throw New NotImplementedException

End Function
End Class