Realeasing file lock?

[snowbunny]

Hi,
I'm having a problem with releasing a file lock after a save. My code takes an image file uploaded via a form, and saves it to disk. That's fine, but I'm trying to add a new function which allows the user to choose to automatically create a thumbnail. At this stage, it throws a "System.OutOfMe moryException: Out of memory." Even if the files are small, I still get this, and I find that if I open up Windows Explorer and try to delete the large image, it's locked by the aspnet_wp process, so I'm guessing it's this lock that's causing the exception (which I know doesn't always mean it's actually out of memory!).
I have tried everything I can think of to release the lock (see the gubbins below!) but it's still not working. Any ideas?

public static Upload uploadFile(HtmlInputFile inputFile, string sSavePath, bool createThumb)
        {
            System.Web.HttpServerUtility Server=HttpContext.Current.Server;
 
            // If file field isn't empty
            if (inputFile.PostedFile.ContentLength > 0)
            {
 
                // Check file size (mustn't be 0)
                HttpPostedFile myFile = inputFile.PostedFile;
                int iFileLen = myFile.ContentLength;
 
                //<snip> do some checks to see if it's accepted file type etc </snip>
 
 
                // Read file into a data stream
                byte[] myData = new Byte[iFileLen];
                myFile.InputStream.Read(myData,0,iFileLen);
 
                // Save the stream to disk
                System.IO.FileStream newFile = new System.IO.FileStream(savepath, System.IO.FileMode.Create);
                try
                {
                    newFile.Write(myData,0, myData.Length);
                }
                catch{}
 
                //anything i can think of to clear the file lock
                inputFile.Dispose();
                newFile.Flush();
                newFile.Close();
                newFile = null;
                myFile = null;
                GC.Collect();
 
 
                if(createThumb)
                {
 
                    string[] pth = savepath.Split('.');
                    string thumbpath = "";
                    for(int i=0;i<pth.Length-1;i++)
                        thumbpath += pth[i];
                    thumbpath += "_thumb";
                    thumbpath += pth[pth.Length-1];
 
                    createThumbnail(savepath,thumbpath,150,150);
 
                }
            }
        }
 
 
 
 
        public static void createThumbnail(string FullImagePath, string thumbnailPath, int maxWidth, int maxHeight)
        {
            //read the full size image -- ***This is where the exception is thrown***
            System.Drawing.Image fullSizeImg = System.Drawing.Image.FromFile(FullImagePath);
 
            // check the sizes to see if we need to resize
            bool resize = false;
            int thumbWidth = fullSizeImg.Width;
            int thumbHeight = fullSizeImg.Height;
 
 
            //check to see if the width is too large, set new sizes if required
            if(thumbWidth > maxWidth)
            {
                resize = true;
                thumbWidth = maxWidth;
                thumbHeight = maxWidth/fullSizeImg.Width * fullSizeImg.Height;
            }
 
            // then we have to check to see if the height is within the constriants and try again
            if(thumbHeight > maxHeight)
            {
                resize = true;
                thumbHeight = maxHeight;
                thumbWidth = maxHeight/fullSizeImg.Height * fullSizeImg.Width;
            }
 
            if(resize)
            {
                System.Drawing.Image thumbNailImg = fullSizeImg.GetThumbnailImage(thumbWidth, thumbHeight, null, IntPtr.Zero);
                thumbNailImg.Save(thumbnailPath,ImageFormat.Jpeg);
 
                //Clean up / Dispose...
                thumbNailImg.Dispose();
            }
        }
 

[Plater]

Well I'm not sure I'm following what you're doing with htmlinputfile and htmlpostfile, but it looks like you're closing all your filehandles and everything correctly.
I guess I would say that when reading an image in, I recomend using the Bitmap class (even if it's a jpeg/gif/png/whatever don't worry about it) it might have a better ability to input the file?