WPF Image控件中的ImageSource与Bitmap的互相转换

最新推荐文章于 2024-09-27 16:32:01 发布

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最新推荐文章于 2024-09-27 16:32:01 发布

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原文链接：http://www.cnblogs.com/zp89850/archive/2011/10/27/2226039.html

本文详细介绍了如何在WPFImage控件中将Bitmap转换为ImageSource以及如何从ImageSource转换回Bitmap，包括从Icon到ImageSource的转换过程，并提供了相关代码示例。

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WPF Image控件中的ImageSource与Bitmap的互相转换

1.从bitmap转换成ImageSource

　　　[DllImport("gdi32.dll", SetLastError = true)]

private static extern bool DeleteObject(IntPtr hObject);

/// <summary>

/// 从bitmap转换成ImageSource

/// </summary>

/// <param name="icon"></param>

/// <returns></returns>

public static ImageSource ChangeBitmapToImageSource(Bitmap bitmap)

{

//Bitmap bitmap = icon.ToBitmap();

IntPtr hBitmap = bitmap.GetHbitmap();

ImageSource wpfBitmap = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(

hBitmap,

IntPtr.Zero,

Int32Rect.Empty,

BitmapSizeOptions.FromEmptyOptions());

if (!DeleteObject(hBitmap))

{

throw new System.ComponentModel.Win32Exception();

}

return wpfBitmap;

}

2.从Bitmap转换成BitmapSource

/// <summary>

/// 从Bitmap转换成BitmapSource

/// </summary>

/// <param name="bmp"></param>

/// <returns></returns>

public static BitmapSource ChangeBitmapToBitmapSource(this Bitmap bmp)

{

BitmapSource returnSource;

try

{

returnSource = Imaging.CreateBitmapSourceFromHBitmap(bmp.GetHbitmap(),IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());

}

catch

{

returnSource = null;

}

return returnSource;

}

3.从Icon到ImageSource的转换

/// <summary>

/// 从Icon到ImageSource的转换

/// </summary>

public ImageSource ChangeIconToImageSource( Icon icon)

{

ImageSource imageSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHIcon(

icon.Handle,

Int32Rect.Empty,

BitmapSizeOptions.FromEmptyOptions());

return imageSource;

}

4.从Icon到ImageSource的转换

internal static class IconUtilities
{
[DllImport("gdi32.dll", SetLastError = true)]
private static extern bool DeleteObject(IntPtr hObject);

public static ImageSource ToImageSource(this Icon icon)
{
Bitmap bitmap = icon.ToBitmap();
IntPtr hBitmap = bitmap.GetHbitmap();

ImageSource wpfBitmap = Imaging.CreateBitmapSourceFromHBitmap(
hBitmap,
IntPtr.Zero,
Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions());

if (!DeleteObject(hBitmap))
{
throw new Win32Exception();
}

return wpfBitmap;
}

　　// 这个是没有附加转换的，：）
　　public static ImageSource ToImageSource(this Icon icon)
    {
        ImageSource imageSource = Imaging.CreateBitmapSourceFromHIcon(
            icon.Handle,
            Int32Rect.Empty,
            BitmapSizeOptions.FromEmptyOptions());

        return imageSource;
    }

}

调用：ImageSource wpfBitmap = img.ToImageSource();
参考：http://stackoverflow.com/questions/1127647/convert-system-drawing-icon-to-system-media-imagesource

5.从ImageSource转换成Bitmap，是从ImageSource中取出UriSource.LocalPath，然后使用 new Bitmap(FileName)的方法获取。其他的方法我还没有找到，

// System.Windows.Controls.Image ImgUserHeadFaceCutEdit;

string str1 = ((BitmapImage)(ImgUserHeadFaceCutEdit.Source)).UriSource.AbsolutePath;// 此路径new Bitmap(str1)无法识别

string str2 = ((BitmapImage)(ImgUserHeadFaceCutEdit.Source)).UriSource.LocalPath ;

//Bitmap sourceImage = new Bitmap(sourceImageUri.ToString());

string str3 = strImgSourceFileName;

Console.WriteLine("AbsolutePath =" + str1);

Console.WriteLine("LocalPath =" + str2);

Console.WriteLine("srceFileName =" + str3);

这是运行结果：