Difficulty Saving Image To MemoryStream

Question

I'm having some difficulty saving a stream of bytes from an image (in this case, a jpg) to a System.IO.MemoryStream object. The goal is to save the System.Drawing.Image to a MemoryStream, and then use the MemoryStream to write the image to an array of bytes (I ultimately need to insert it into a database). However, inspecting the variable data after the MemoryStream is closed shows that all of the bytes are zero... I'm pretty stumped and not sure where I'm doing wrong...

using (Image image = Image.FromFile(filename)) {     byte[] data;      using (MemoryStream m = new MemoryStream())     {         image.Save(m, image.RawFormat);         data = new byte[m.Length];         m.Write(data, 0, data.Length);     }      // Inspecting data here shows the array to be filled with zeros... } 

Any insights will be much appreciated!

Answer 1

To load data from a stream into an array, you read, not write (and you would need to rewind). But, more simply in this case, ToArray():

using (MemoryStream m = new MemoryStream()) {     image.Save(m, image.RawFormat);     data = m.ToArray(); }