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Re: fetch jpeg image dimension without load it Luc Pattyn3-Jul-07 2:45 Luc Pattyn 3-Jul-07 2:45  I answered this question a couple of days ago right here.[^] Luc Pattyn [My Articles] [Forum Guidelines] Re: fetch jpeg image dimension without load it [modified] small_programmer3-Jul-07 2:57 small_programmer 3-Jul-07 2:57  thank you very much . can i trust it completely that it work correctly in any jpeg file? thank you again. Re: fetch jpeg image dimension without load it Dave Kreskowiak3-Jul-07 6:51 Dave Kreskowiak 3-Jul-07 6:51  Only if you test it to death. A guide to posting questions on CodeProject[^] Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic      2006, 2007 Re: fetch jpeg image dimension without load it small_programmer10-Jul-07 2:55 small_programmer 10-Jul-07 2:55  i dont understand what you say? Re: fetch jpeg image dimension without load it Dave Kreskowiak10-Jul-07 12:26 Dave Kreskowiak 10-Jul-07 12:26  What's not to understand??!! The only way YOU can "trust" any code you use is if YOU exhaustively test it! A guide to posting questions on CodeProject[^] Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic      2006, 2007 Re: fetch jpeg image dimension without load it Pete O'Hanlon3-Jul-07 2:50 Pete O'Hanlon 3-Jul-07 2:50  The site isn't intended to show you C# code. It's the jpeg format only. What you need to do is read in the file, a byte at a time until you read in the Xdensity and Ydensity bytes (each of which is two bytes). If you read in the first 18 bytes, the 14th will tell you the JPEG unit, the next two will be the X density and the last two will be the Y density. Please visit http://www.readytogiveup.com/ and do something special today. Deja View - the feeling that you've seen this post before. Re: fetch jpeg image dimension without load it small_programmer3-Jul-07 3:00 small_programmer 3-Jul-07 3:00  thank you . but can you offer a formula between density and unit that result in the height and width in pixel. if you do it i will thank you very much Re: fetch jpeg image dimension without load it Colin Angus Mackay3-Jul-07 3:43 Colin Angus Mackay 3-Jul-07 3:43  Well, according to the link. If units is zero then Xdensity and Ydensity are already in pixels. If it is 1 or 2 it is in dots per inch or cm respectively. You will then need to find out the dots per inch/cm on the output device and scale appropriately. For example, if the image is a photo at 300dpi and it is to be displayed on a screen at 96dpi then you need to reduce the number of pixels by source/destination or 300/96 (3.125) Upcoming events: * Glasgow: Mock Objects, SQL Server CLR Integration, Reporting Services, db4o, Dependency Injection with Spring ... "I wouldn't say boo to a goose. I'm not a coward, I just realise that it would be largely pointless." Ready to Give up - Your help will be much appreciated. My website Re: fetch jpeg image dimension without load it small_programmer3-Jul-07 4:09 small_programmer 3-Jul-07 4:09  thank you very much . Re: fetch jpeg image dimension without load it [modified] small_programmer3-Jul-07 4:50 small_programmer 3-Jul-07 4:50  it does not give me the height and width in pixel yet. i want only height and width. unit and density does not help me thank you again. How to save images into Access DataBase AR Reddy3-Jul-07 2:15 AR Reddy 3-Jul-07 2:15  Hi, I want to save the images into Access database in C#. Please give ne the sample piece of code if you have or give me the related links. Thanks in Advance, AR Reddy Re: How to save images into Access DataBase WhiteGirl233-Jul-07 2:34 WhiteGirl23 3-Jul-07 2:34  Hi, to save images in access first transform them in bytes and then insert them in access. Re: How to save images into Access DataBase Dave Kreskowiak3-Jul-07 6:46 Dave Kreskowiak 3-Jul-07 6:46  There's a bazillion examples out on the web. All you have to do is Google for "C# save image access database". A guide to posting questions on CodeProject[^] Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic      2006, 2007 Expanding on what Dave said... leckey3-Jul-07 8:10 leckey 3-Jul-07 8:10  I looked at some of your previous posts and many are considered 'generic' questions and several people have already told you to try to use Google. This forum is more for people who write their own code and then need help fixing it. ______________________ stuff + cats = awesome Drag and drop to the cursor Gene Arnold3-Jul-07 2:02 Gene Arnold 3-Jul-07 2:02  Has anyone got an example of how to drag and drop into a multi line textbox or rich textbox? I need to be able to drag an item from a listbox and drop that item on the box where the cursor is. Re: Drag and drop to the cursor originSH3-Jul-07 3:01 originSH 3-Jul-07 3:01  It's not specificly about the controls you want but it'll give you the general jist. http://www.codeproject.com/csharp/dandtutorial.asp[^] how can i save a C# form at run time ? B.A3-Jul-07 2:01 B.A 3-Jul-07 2:01  hi i create an application that user can change design forms at run time. how can i save a C# form at run time tanks Re: how can i save a C# form at run time ? Martin#3-Jul-07 2:17 Martin# 3-Jul-07 2:17  Hello, Search for Serialization, System.XML for example. All the best, Martin Re: how can i save a C# form at run time ? Vikram A Punathambekar3-Jul-07 2:18 Vikram A Punathambekar 3-Jul-07 2:18  B.A wrote: i create an application that user can change design forms at run time. how can i save a C# form at run time Are you saying you want the form's controls to have the same values the next time the user opens your app? You can save the data to a file or the registry when you exit, and simply read them when you start again. Cheers, Vıkram. After all is said and done, much is said and little is done. Problem with MemorySream wesch3-Jul-07 1:58 wesch 3-Jul-07 1:58  Why does the following code snippet MemoryStream stream = new MemoryStream(); XmlTextWriter writer = new XmlTextWriter(stream, Encoding.UTF8); writer.WriteStartDocument(); writer.WriteElementString("Test", "Test"); writer.WriteEndDocument(); writer.Flush(); stream.Seek(0, SeekOrigin.Begin); Console.WriteLine(Encoding.UTF8.GetString(stream.ToArray())); produce the following output: ?<test>Test The question mark at the beginning is meant. I've tried different encodings, it does not happen with Default and ASCII. When I use a StreamReader I can get it to work, but I will understand where the problem is. Re: Problem with MemorySream WillemM3-Jul-07 2:31 WillemM 3-Jul-07 2:31  Let me try that piece out... Looks interesting. It has something to do with the number of bytes in a character. The "old" ASCII uses 7 bits, while UTF8, you guessed it uses 8 bits. But it doesn't really explain why you get the weird character at the beginning. Have you tried looking up some info about text encoding on google? Re: Problem with MemorySream wesch3-Jul-07 2:37 wesch 3-Jul-07 2:37  Yes, I've tried to find some hints on Google but without success. Console.WriteLine(new StreamReader(stream).ReadToEnd()); works correct. Re: Problem with MemorySream Luc Pattyn3-Jul-07 2:42 Luc Pattyn 3-Jul-07 2:42  when you create a stream or file in UTF8 or in Unicode, it will start with a 2-byte indication of the encoding; in your case it is 0xFE 0xBB. Only then will appear the first "real" character (0x3C for <). If you write to file, then open the file in a text editor, both cases work just fine, because the editor consumes the optional 2-byte to understand how it needs to interpret the remainder. Your reading code however does not discover the encoding, it has that information baked into the code, so it treats the 0xFE oxBB as real characters and since they are not really printable (above 0x7E), it turns them into a single question mark. Luc Pattyn [My Articles] [Forum Guidelines] Magnification Algorithm free_soul4243-Jul-07 1:38 free_soul424 3-Jul-07 1:38  hi, i am trying to implement magnification just like ACDC. Any one can guide me about magnification algorithm. i will b thankful to you. regards, Re: Magnification Algorithm [modified] small_programmer3-Jul-07 3:19 small_programmer 3-Jul-07 3:19  it doesn't have any special algorithm. you can use .net methods (antialiasing enabled) to do it. simply create a panel and on paint event use e.Graphics.DrawImage() method to draw your image in your panel that larged according the zoom when e.i. + key pressed. -- modified at 10:32 Tuesday 3rd July, 2007 modified 8-Jan-14 3:11am.

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