WPF - 将位图转换为 ImageSource-C#/.NET问题

WPF - converting Bitmap to ImageSource(WPF - 将位图转换为 ImageSource)

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问题描述

我需要将 System.Drawing.Bitmap 转换为 System.Windows.Media.ImageSource 类，以便将其绑定到 WizardPage 的 HeaderImage 控件(扩展WPF 工具包).位图被设置为我编写的程序集的资源.它被这样引用:

I need to convert a System.Drawing.Bitmap into System.Windows.Media.ImageSource class in order to bind it into a HeaderImage control of a WizardPage (Extended WPF toolkit). The bitmap is set as a resource of the assembly I write. It is being referenced like that:

public Bitmap GetBitmap
{
   get
   {
      Bitmap bitmap = new Bitmap(Resources.my_banner);
      return bitmap;
   }
}

public ImageSource HeaderBitmap
{
   get
   {
      ImageSourceConverter c = new ImageSourceConverter();
      return (ImageSource)c.ConvertFrom(GetBitmap);
   }
}

转换器是我在此处找到的.我在

return (ImageSource) c.ConvertFrom(Resources.my_banner);

如何初始化 ImageSource 以避免此异常?或者还有其他方法吗?我想在之后使用它:

How can I initialize ImageSource in order to avoid this exception? Or is there another way? I want to use it afterwards like:

<xctk:WizardPage x:Name="StartPage" Height="500" Width="700"
                 HeaderImage="{Binding HeaderBitmap}" 
                 Enter="StartPage_OnEnter"

提前感谢您的回答.

推荐答案

对于其他人，这有效:

    //If you get 'dllimport unknown'-, then add 'using System.Runtime.InteropServices;'
    [DllImport("gdi32.dll", EntryPoint = "DeleteObject")]
    [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool DeleteObject([In] IntPtr hObject);

    public ImageSource ImageSourceFromBitmap(Bitmap bmp)
    {
        var handle = bmp.GetHbitmap();
        try
        {
            return Imaging.CreateBitmapSourceFromHBitmap(handle, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
        }
        finally { DeleteObject(handle); }               
    }

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