XamlParseException - Image Pixels Manipulation with WPF C# / Kinect

Question

I want to use this code to access the image pixels to be used with my Kinect code.. so i can replace the depth bits with the Image bits, so i created a WPF application and As soon as i run my code, i get this exception (it doesnt happen on a Console application) but i need this to run as a WPF application since . . i intend to use it with Kinect

XamlParseException

'The invocation of the constructor on type 'pixelManipulation.MainWindow' that matches the specified binding constraints threw an exception.' Line number '3' and line position '9'.

Here is the code:

public partial class MainWindow : Window
    {

           System.Drawing.Bitmap b = new
                System.Drawing.Bitmap(@"autumn_scene.jpg");


        public MainWindow()
        {
            InitializeComponent();

            doSomethingWithBitmapFast(b);

        }

        public static void doSomethingWithBitmapFast(System.Drawing.Bitmap bmp)
        {
            Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);

            System.Drawing.Imaging.BitmapData bmpData =
                bmp.LockBits(rect,
                    System.Drawing.Imaging.ImageLockMode.ReadOnly,
                    bmp.PixelFormat);

            IntPtr ptr = bmpData.Scan0;

            int bytes = bmpData.Stride * bmp.Height;
            byte[] rgbValues = new byte[bytes];

            System.Runtime.InteropServices.Marshal.Copy(ptr,
                           rgbValues, 0, bytes);

            byte red = 0;
            byte green = 0;
            byte blue = 0;

            for (int x = 0; x < bmp.Width; x++)
            {
                for (int y = 0; y < bmp.Height; y++)
                {
                    //See the link above for an explanation 
                    //of this calculation (assumes 24bppRgb format)
                    int position = (y * bmpData.Stride) + (x * 3);
                    blue = rgbValues[position];
                    green = rgbValues[position + 1];
                    red = rgbValues[position + 2];
                    Console.WriteLine("Fast: " + red + " "
                                       + green + " " + blue);
                }
            }
            bmp.UnlockBits(bmpData);
        }
    }
}

Rafal · Answer 1 · 2012-07-19T12:26:27.907

1

The issue is in your xaml file not in your code. As exception states xaml parse exception. My guess is that you had some event handler / property declared in xaml to bind to something that no longer exists. Post xaml file content for more help.

Edit

So it is not what it seams to be. Xaml file is OK, But code is not. There is an exception thrown in constructor on line

System.Drawing.Bitmap b = new
            System.Drawing.Bitmap(@"autumn_scene.jpg");

I'm not sure why this call to bitmap constructor is invalid but changing it to:

System.Drawing.Bitmap b = new Bitmap(
            System.Drawing.Image.FromFile(@"autumn_scene.jpg"));

should work fine.

edited Jul 19 '12 at 12:26

answered Jul 19 '12 at 10:50

Rafal

12,391
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– Sweta Dwivedi Jul 19 '12 at 10:57
I see some semicolons after xmlns declarations. Remove them and it should run. – Rafal Jul 19 '12 at 11:08
There are no semi-colons . . i dont know why its showing here – Sweta Dwivedi Jul 19 '12 at 11:14
I can copy the whole exception file here ..I mean Details – Sweta Dwivedi Jul 19 '12 at 11:20
Have you tried to commenting out `doSomethingWithBitmapFast(b);` from constructor? I assume that xmlns statements also start with `http://` and it is not shown here? Is there an inner exception in your exception? – Rafal Jul 19 '12 at 11:22
Commenting out the doSomethingWithBitmapFast(b) doesnt stop the exception .. and the Inner Expection says {"Parameter is not valid."} – Sweta Dwivedi Jul 19 '12 at 11:27
You know what, I'm stunned. Try to crate new wpf windows project and just run it without modification. – Rafal Jul 19 '12 at 11:50
Another idea! comment the 'new System.Drawing.Bitmap(@"autumn_scene.jpg");' – Rafal Jul 19 '12 at 11:52
Yes this is it. Now I know to ask for stack trace :) – Rafal Jul 19 '12 at 11:55
Is your inner exception of type FileNotFoundException. – Rafal Jul 19 '12 at 12:38
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/14162/discussion-between-rafal-and-sweta-dwivedi) – Rafal Jul 20 '12 at 08:12

XamlParseException - Image Pixels Manipulation with WPF C# / Kinect

1 Answers1