Re: Docx contains 0 byte image if Imagepart feedata uses memorystream

Hello all,

I'm not sure if this is the right spot but it seems the most active forum so here goes..

I have created a test program in C# and .NET 3.5 which takes an image from a database (in the form of a byte array) and inserts the image into a word document. When I add a new image part to a word document and call imagepart.FeedData(ms) where ms is a MemoryStream loaded from a byte array, the final document contains a 0 byte image and the image appears as a red x in word. If I take the same byte array, write it to a file, and then read it to a file stream and pass it to the FeedData method, the image appears correctly in the word document.

Here is the code I`m currently using....

public void InsertAPicture(string document, byte[] bytImage)

using (WordprocessingDocument wordprocessingDocument = WordprocessingDocument.Open(document, true))

{

// Load the Image into memory stream

MemoryStream msImage = new MemoryStream();

msImage.Write(bytImage, 0, bytImage.Length);

msImage.Seek(0, SeekOrigin.Begin); //set to begin of image.

//Load image to image object

System.Drawing.Image objImage = System.Drawing.Image.FromStream(ms);

//Add Image to document

MainDocumentPart mainPart = wordprocessingDocument.MainDocumentPart;

ImagePart imagePart = mainPart.AddImagePart(ImagePartType.Jpeg);

imagePart.FeedData(msImage); //

 

// Display its Height and Width

string strId = mainPart.GetIdOfPart(imagePart);

AddImageToBody(wordprocessingDocument, strId, new Size(objImage.Width, objImage.Height));

wordprocessingDocument.Package.Close();

}

Does anyone have any idea why this might be happening? Thanks.

Well, I've been unable to find a reason as to why the memorystream doesn't work and the filestream does. Luckily saving the files to a temp directory with filestream and rereading it will work as well.

stackoverflow.com/.../writing-bitmap-to-openxml-imagepart-via-memorystream

There is the solution.

add:

ms.Position = 0;

That line should be added between the Save and FeedData calls.