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Re: byte array to image Vivek Vijayan8-Jul-09 2:25 Vivek Vijayan 8-Jul-09 2:25  sry i din undrstd ur question i m giving the code code and i m getting just "Exception".i cant understand wht exception is it.sometimes i m getting outofmemory exception.the line that throws exception is pictureBox1.Image = new Bitmap(File.Open("\\Program Files\\syswifi\\pic\\screen.Bmp",FileMode.Open,FileAccess.Read)); this line raises another exception too "the process cannot access the files \Program Files\\syswifi\\pic\\screen.jpg because it is used been used by another process" System.IO.MemoryStream ms = new System.IO.MemoryStream(data); try { FileStream fs = new FileStream("\\Program Files\\syswifi\\pic\\screen.Bmp", FileMode.Create); ms.WriteTo(fs); fs.Close(); ms.Flush(); ms.Close(); pictureBox1.Image = new Bitmap(File.Open("\\Program Files\\syswifi\\pic\\screen.Bmp",FileMode.Open,FileAccess.Read)) ; } catch(Exception ex) { MessageBox.Show("Failed to display" + ex.Message); } how can can i load an image in to a picture box in mobile application This code was posted by me... Re: byte array to image harold aptroot8-Jul-09 2:41 harold aptroot 8-Jul-09 2:41  My question is actually very important, if your data is "just pixels" then saving it in a BMP file will just give an invalid BMP file - when the Bitmap importer then tries to read it, it will read the width and height but they would be colors instead of the width and height and they will probably be very big, then it will try to allocate too much memory because it thinks the picture is that big (when of course it really isn't). So what is your data? Is it pixels? Or do you have a proper image header in there? If so, of what type? Re: byte array to image Vivek Vijayan8-Jul-09 4:08 Vivek Vijayan 8-Jul-09 4:08  my application is like this: windows appliaction send the image as bytes and the mobile device receives the bytes and then i send it to a memory stream and convert it back to picture.. i want to get image from that received byte array or memory stream.i m new to this mobile application development. so i still cant differentiate raw pixel or complete image. This code was posted by me... Re: byte array to image harold aptroot8-Jul-09 4:20 harold aptroot 8-Jul-09 4:20  How does it send the image as bytes? Re: byte array to image Vivek Vijayan8-Jul-09 4:27 Vivek Vijayan 8-Jul-09 4:27  i convert the image to bytes and send using socket.send() This code was posted by me... Re: byte array to image harold aptroot8-Jul-09 4:32 harold aptroot 8-Jul-09 4:32  Vivek Vijayan wrote: convert the image to bytes Well that is the most important part - How do you convert it? Re: byte array to image Vivek Vijayan8-Jul-09 5:01 Vivek Vijayan 8-Jul-09 5:01  here is the code Bitmap bmp = new Bitmap("D:\\screen.Bmp"); bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp); byte[] size = ms.ToArray(); sockt.Send(size); This code was posted by me... Re: byte array to image Vivek Vijayan8-Jul-09 5:09 Vivek Vijayan 8-Jul-09 5:09  and the receiving part code is byte[] data = new byte[1024]; data=receivefile(); System.IO.MemoryStream ms = new System.IO.MemoryStream(data); try { FileStream fs = new FileStream("\\Program Files\\syswifi\\pic\\screen.Bmp", FileMode.Create); ms.WriteTo(fs); ms.Flush(); fs.Close(); ms.Close(); i m getting "exception in this code" pictureBox1.Image = new Bitmap("\\Program Files\\pic\\screen.Bmp"); } catch(Exception ex) { MessageBox.Show("Failed to display" + ex.Message.ToString()); } i getting "Exception" in the last line it is not telling what is the exception its displaying just "Exception" This code was posted by me... Re: byte array to image Vivek Vijayan8-Jul-09 5:13 Vivek Vijayan 8-Jul-09 5:13  when i run applicn when it reaches this line "picturebox1.image=new Bitmap("\\Program Files\\pic\\screen.Bmp")" is null This code was posted by me... Re: byte array to image harold aptroot8-Jul-09 5:15 harold aptroot 8-Jul-09 5:15  Maybe it's bigger than 1024 bytes? Also, why do you use the memorystream .. for nothing? You could write the array directly to the stream (or if File.WriteAllBytes is available, that's even easier) Re: byte array to image Vivek Vijayan8-Jul-09 5:23 Vivek Vijayan 8-Jul-09 5:23  how do i get byte array from the an image with out using memory stream This code was posted by me... Re: byte array to image harold aptroot8-Jul-09 5:26 harold aptroot 8-Jul-09 5:26  Scanning the pixels, but I was referring to the receiving code, which doesn't use the memory stream for anything other than the WriteTo method Re: byte array to image Vivek Vijayan8-Jul-09 5:49 Vivek Vijayan 8-Jul-09 5:49  what is the other way...but i m not able to open the image using the code pictureBox1.Image =new Bitmap("\\Program Files\\pic\\screen.Bmp"); and pictureBox1.Image =File.Open("\\Program Files\\pic\\screen.Bmp", FileMode.Open, FileAccess.Read));its raising exception "Exception" This code was posted by me... Re: byte array to image harold aptroot8-Jul-09 6:01 harold aptroot 8-Jul-09 6:01  Well if you have that filestream you can just fs.Write(buffer, 0, 1024) Assigning a stream to the Image property should not even compile though Re: byte array to image Vivek Vijayan8-Jul-09 6:09 Vivek Vijayan 8-Jul-09 6:09  i m getting exception when i load to picture box This code was posted by me... Re: byte array to image harold aptroot8-Jul-09 6:20 harold aptroot 8-Jul-09 6:20  Are you sure? Maybe you are getting it when you load the bitmap? You'd have to put it on 2 lines to know that. Re: byte array to image Vivek Vijayan8-Jul-09 6:32 Vivek Vijayan 8-Jul-09 6:32  exception "Exception" is caught on loading the image. why it is happening?? and wht type of exception is this This code was posted by me... Re: byte array to image Vivek Vijayan8-Jul-09 6:49 Vivek Vijayan 8-Jul-09 6:49  sorry the exception is not cought on loading its in ht eline picturebox1.image=new Bitmap(fs) where fs is file stream This code was posted by me... Re: byte array to image Vivek Vijayan8-Jul-09 7:00 Vivek Vijayan 8-Jul-09 7:00  NullReferenceException is caught in the line fs=File.Open("\\Program Files\\pic\\screen.Bmp", FileMode.Open, FileAccess.Read); pictureBox1.Image =new Bitmap(fs); This code was posted by me... Re: byte array to image harold aptroot8-Jul-09 7:07 harold aptroot 8-Jul-09 7:07  So.. fs is null? AFAIK that can never happen, it would have to give an other exception as detailed here: File.Open on MSDN[^] I don't know what else? Re: byte array to image Vivek Vijayan8-Jul-09 8:16 Vivek Vijayan 8-Jul-09 8:16  i don knwo wht is happening,The file is created. that i can see when when i browse the folder. but null reference exception is shown when i run applcn. This code was posted by me... Re: byte array to image harold aptroot8-Jul-09 8:42 harold aptroot 8-Jul-09 8:42  Is the file ok? does it open in, say, paint without error? Re: byte array to image Vivek Vijayan8-Jul-09 10:07 Vivek Vijayan 8-Jul-09 10:07  no there is error in opening its telling something like invalid data....how firts i need to convert byte array or memory stream to image....thats the problem persisting............. This code was posted by me... Re: byte array to image Vivek Vijayan8-Jul-09 18:34 Vivek Vijayan 8-Jul-09 18:34  i got it correct!!!! the error was in writing to file thanks!!! This code was posted by me... Re: byte array to image harold aptroot8-Jul-09 3:18 harold aptroot 8-Jul-09 3:18  You know, it's actually easier if it's "just pixels". Then you can just make an empty bitmap and write the pixels to it yourself. But you had best find out, because it really is a very important difference..

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