将位图显示为图像

时间:2014-07-26 19:41:34

标签: c# wpf

我有qrcode生成器(我使用ZXing.QrCode)

public Bitmap GenerateQR(int width, int height, string text)
    {
        var bw = new ZXing.BarcodeWriter();
        var encOptions = new ZXing.Common.EncodingOptions() { Width = width, Height = height, Margin = 0 };
        bw.Options = encOptions;
        bw.Format = ZXing.BarcodeFormat.QR_CODE;
        var result = new Bitmap(bw.Write(text));

        return result;
    }

现在我想在新窗口显示qr代码,所以我打电话给:

var window = new Zeszycik.View.show(GenerateQR(300,300,"some txt")); 
window.Show();

但我不知道如何在新窗口中显示qrcode

public show(Bitmap qrcode)
    {
        InitializeComponent();
        print(qrcode);
    }
    private void print(Bitmap img)
    {
       image.Source = img; //error
    }

1 个答案:

答案 0 :(得分:0)

图片来源属性的类型为 ImageSource ,但 Bitmap 并非来自ImageSource,因此您需要将其转换为实例ImageSource可以是 BitmapImage BitmapSource

现在,要将Bitmap转换为BitmapSource,您可以参考此链接here。为了完整答案,我将在此处的链接中发布答案:

[System.Runtime.InteropServices.DllImport("gdi32.dll")]
public static extern bool DeleteObject(IntPtr hObject);

private BitmapSource Bitmap2BitmapSource(Bitmap bitmap)
{
    IntPtr hBitmap = bitmap.GetHbitMap();
    BitmapSource retval;

    try
    {
        retval = Imaging.CreateBitmapSourceFromHBitmap(
                     hBitmap,
                     IntPtr.Zero,
                     Int32Rect.Empty,
                     BitmapSizeOptions.FromEmptyOptions());
    }
    finally
    {
        DeleteObject(hBitmap); //Necessary to avoid memory leak.
    }

    return retval;
}

现在您可以像这样设置图像源:

image.Source = Bitmap2BitmapSource(img);
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