how to get the size and type of images?

how to get the size and type of images?

• Ryan0788

  hi michael
  
  i wrote in vb and i wanted to convert your example to vb.
  but i don't know how to convert this :
  
   using (Image img = new Image(imageFile))
   
  i tried :
   imports(dim img as new image(imagefile))
  
  but it's not true
  
  

• VCPPUser

  Your best reference is the MSDN library.  It contains example code for this class along with most of the others.  If you want to do even more with this class then you should get a good book like Programming Windows Forms with C# by Charles Petzold.  It contains an entire chapter on the topic and is a really good reference.  As for your direct question here is some sample code that might help:
  
  using System.Drawing;
  
  public bool IsValidFormat ( string imageFile )
  {
     using (Image img = new Image(imageFile))
     {
        //Validate resolution (ensure it is 1024x768)
        if ((img.Width != 1024) || (img.Height != 768))
           return false;
  
        //Validate format (ensure it is a jpeg)
        if (img.RawFormat != ImageFormat.Jpeg)
           return false;
  
        //Must be valid
        return true;
     };
  }
  
  This function verifies the file is a jpeg of 1024x768 size.  Of course I would recommend that if the file isn't a proper format that you simply modify it to be valid and then send it.  You could prompt the user first.  Of course your requirements might not be this flexible but users may get annoyed if they have to open the image in Paint just to resize and resave it.
  
  Michael Taylor - 10/30/05
  
  

• Adam_C

  thank u for your reply
  
  would u please give me some refrences
  i don know how to use Image class
  

• mcarr

  You can load the image using the Image class.  On this class are properties to tell you the format and size of the picture.  You might consider making an enhancement to automatically convert images to the correct size and format.  You can do this through the same Image class. 
  
  Size - Size of image in pixels.
  RawFormat - Will be ImageFormat.Jpeg for JPEG.
  
  Image doesn't work with all image files so you'll want to wrap it in an exception handler.  You also need to make sure you dispose of the Image object otherwise you'll leak memory and the file will remain locked.
  
  Michael Taylor - 10/24/05
  
  

• Roman Hnatiuk

  thank u for yor reply
  
  would u please give me some references
  i don know how to use Image class
  
  
  
• how to get the size and type of images?