find file size of a bitmap object?

Question

User-1438894470 posted

 Hey all.

I have an image file, which I load into my application, and create a bitmap object with it, but changing teh width/height. Is there anyway I can find out how much the filesize would be for this when it gets saved, without actually saving it at this point?

Basically, with resizing, I want to show the new width/height which is easy enough, but also what the filesize would be for saving teh image. Then if the user decides to save they can do so.

Thanks, Paul.

Answer 1

User-18289217 posted

 Can't you read the bytes of the new bitmap?

Answer 2

User-1438894470 posted

 whats the gbest way to do that?

When creating the file, I will be doing

 newBMP.Save(strFilename, ifExt)

 where ifEXT is the imageformat (i.e. .jpg or .gif etc etc), so any size I get to would need to mirror what that would save as.

Answer 3

User-196746684 posted

2 ways to do it

1) call a component like Leadtools

2)  System.Drawing.Image

				Dim _leadctrl As New LEADLib.LEAD
				_leadctrl.GetFileInfo(LocalPath, 0, 0)
				PicHeight = _leadctrl.InfoHeight
				PicWidth = _leadctrl.InfoWidth
				_leadctrl = Nothing



				'Dim fullSizeImg As System.Drawing.Image
				'fullSizeImg = System.Drawing.Image.FromFile(LocalPath)
				'PicHeight = fullSizeImg.Height
				'PicWidth = fullSizeImg.Width
				'fullSizeImg.Dispose()

 

Answer 4

User-1438894470 posted

 that code still only gets me the height and width which I already know. It doesnt get me the size. I need a way to get the size without saving. The reason for this is the user can resize the image using a scroll bar type button..which will constantly change the size as it goes.