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?