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Get all points of Image to redraw c#

Based on this post - save a graphics object to a varbinary db column c#, I created a control where I allow the user to draw on the control, and I save the drawn image to a database varbinary column. My problem is when I need to reload the signature and allow user to continue editing. I don't have all the points of the original image, so when I redraw, I only retain the user's edits.
Can somebody pls assist?

I figured it out, I was able to set the image loaded as the image of my picture box control, I used a graphics image from that loaded image. problem solved

Image size in DB?

I made an application that stores Item picture (jpeg) on SQL Server DB, I am using pictures shot with my camera (file size ~ 2 M). I am checking if picture.Width > 800 or picture.Height > 600, then I resize the picture to 800x600.
If I export picture from DB, the file size is about 100k, and if I open the same picture in photoshop, the image size is shown 1.37M.
Now my questions are:
First, I want to know the space that this picture takes in my DB.
The reason I'm resizing the picture before storing it in my DB, is that I imagine it taking a huge space in my DB.
Second, How do I resize a picture to keep it's aspect ratio?

The size of the jpg file depends of the widht, height and the color dept. Check this link http://jan.ucc.nau.edu/lrm22/pixels2bytes/calculator.htm to calculate the image size.
to resize the picture size and keep the aspect ratio there is a lot of libraries and framewrok to complete the task. I do not recomend you to implement one unless
you have to (there is a lot of good libraries). check this post Image resizing algorithm.
Its not good idea to store image in DB check Storing Images in DB - Yea or Nay?

Put .Gif Image from Clipboard to PictureBox

I want to copy gif image from Browser and paste to PictureBox
Image cImage = Clipboard.GetImage();
pictureBox1.Image = (Image)cImage;
This put image, but its not animated.

The image on the clipboard isn't a GIF, it's a Bitmap or DIB (or both). Those are the formats that you would see, if you used the old XP Clipboard Viewer (clipbrd.exe), or if you enumerated the available clipboard formats within your program.
See the list of standard clipboard formats: http://msdn.microsoft.com/en-us/library/windows/desktop/ff729168(v=vs.85).aspx
GIF is not one of them.
Also, there is no JPG or PNG. When you copy those images, they're placed onto the clipboard as CF_BITMAP and/or CF_DIB. Basically, Bitmap is the universal image format that everything converts to/from.
As an alternative, you MAY be able to get CF_HTML from the clipboard, figure out where the image is, and then fetch it from the server (or maybe the browser cache), preserving the original GIF information.

Re-encoding of Jpeg Image in binary column when saving

I know there are similar questions, but I have a question concerning the storage of images in a binary-column.
I have a small windows forms app that loads an image into a picturebox control from a sql compact db using Linq2SQL. The user can drag any image (jpg,bmp,gif) on a picturebox. On the DragDrop-Event the image is loaded into the picturebox.
When I save the record following code is executed to store the image of the picturebox control:
MemoryStream imgStream = new MemoryStream();
pictureBox1.Image.Save(imgStream, System.Drawing.Imaging.ImageFormat.Jpeg);
myTable.MyImage = imgStream.ToArray();
I have checked the size of the byte array and it didn't change after saving the record.
Is the image re-encoded every time the Save-Method is called? It would be maybe then better to check if the image has changed at all.

JPEG images are decoded as a function of their being displayed by .NET (or really just about anything). So, if you pull a JPEG out as a binary, put it in a PictureBox (which will convert it to a raster format to display), then take that now-uncompressed raster Image and recompress it, you MAY end up making changes to that image.
I would keep the original bytestream for the displayed Image somewhere behind the scenes, and write that back to the DB when the user saves the data. This will not only help preserve the integrity of the image, it will boost performance by reducing the need to recompress the image every time.

If this code is called when you call Save then yes, the PictureBox will "export" itself as a JPEG every time. Are you noticing a performance issue because of this? If you want to avoid it, set a flag on application load and when the drag/drop event occurs raise the flag signaling that the Save method should update the image data.

c# picturebox bitmaps

I have a picturebox that upon request, I save the current display to a bitmap.
My question is, how do I then load that same bitmap to the picturebox?
Thanks.
EDIT:
The only relevant code is:
pictureBox1.DrawToBitmap(test1,pictureBox1.ClientRectangle);
The picture box contains graphics that I have written 'freehand' using the mouse. So you can use the mouse to write directly onto the screen when the left mouse is pressed.

You can assign any image to the picture box that you want during run-time. Just set the Image property of the picture box to the picture you want to be displayed.
For example, to display an image in a picture box from a file on your hard drive, you could use something like:
myPicBox.Image = Image.FromFile("C:\savedimage.bmp");
Or, your edit suggests that you have a bitmap object in memory that you want to display in the picture box. In that case, it's a simple matter of assigning that bitmap object to the Image property:
myPicBox.Image = test1; //(where test1 is your bitmap object in memory)
Edit: Just in case you want to save the bitmap object that you created in memory to disk so that you can reload and use it later, check out the Save method of the Bitmap object:
test1.Save("C:\savedimage.bmp", System.Drawing.Imaging.ImageFormat.Bmp);

If I'm not mistaken, the picturebox should have an Image property that you can simply use to assign the Bitmap to.