.NETGURU
  Search:  
NamespacesDiscussions.NET v1.1Dot Net Guru's BlogIT Certification
Unwanted dithered colors saving image file.
Messages   Related Types
This message was discovered on ASPFriends.com 'ngfx-drawing' list.
Responses highlighted in red are from those people who are likely to be able to contribute good, authoratitive information to this discussion. They include Microsoft employees, MVP's and others who IMHO contribute well to these kinds of discussions.

Steve Sharrock (VIP)

I'm creating a graph that looks fine when saved to my
Response.OutputStream (or assigned to the Text property of a Windows
Forms PictureBox), but the background color gets dithered when saved to
an image file. The background is filled with a solid brush (Color.Gold).
Do I need to specify more parameters when I save the image file?

// this displays fine on the page

Response.ContentType = "image/jpeg";
bitmap.Save(Response.OutputStream, ImageFormat.Jpeg);

// this produces a crappy image (either jpg or gif)

string fn = @"c:\inetpub\wwwroot\TestSite\images\test.jpg";
bitmap.Save( fn, System.Drawing.Imaging.ImageFormat.Jpeg );

Steve Sharrock
programmer / designer
www.sharkcode.com
Reply to this message...
 
    
Mitch Denny (VIP)
Steve,

What you are seeing is a side effect of the image
format that you are saving too. Try using another
format by using the overload for the save method
which allows you to specify alternate formats.

For example:

    bitmap.Save("foo.bmp", ImageFormat.bmp);

Actually, it should determine the correct image
format based on the extension that you provide
anyway, so you could just change the extension :)

Hope this helps.

----------------------------------------
- Mitch Denny
- http://www.warbyte.com
- Click here to reveal e-mail address
- +61 (414) 610-141
-

[Original message clipped]
Reply to this message...
 
 
System.Drawing.Color
System.Drawing.Imaging.ImageFormat
System.Windows.Forms.PictureBox




ExamGuru IT Solutions - .Net Guru is owned and operated by ExamGuru, Inc., the man behind .Net Guru. If you're in the market for bespoke software or software consultancy, why not get him and his highly trained team to help? - www.examguru.net/ITCertification
Ad


Need Dot Net Interview Questions?
Ask ExamGuru, Inc. for advice and help on Passing .Net Interviews
.Net Projects
Best-of-breed application framework for .NET projects, developed by ExamGuru, Inc. and ExamGuru IT
Free .net Help
Commission ExamGuru, Inc. and his team for your next bespoke software project
FogBUGZ
The only bug tracking system carefully crafted with one goal in mind: helping teams create great software.
Awesome Tools
If you don't know about these, you're missing out... IT Certification Questions
IT Interview Questions
Free Oracle 10g Training
MCSE Boortcamp
Cisco Study Guides
Cheap Study Guides
Exact Questions
Dot Net Interview Questions
Oracle OCP
Cheap Travel
Designer Perfumes - Wholesale Prices
Free Programming Tutorials
 
ExamGuru IT Solutions - .Net Guru is owned and operated by ExamGuru, Inc., the man behind .Net Guru. If you're in the market for bespoke software or software consultancy, why not get him and his highly trained team to help? - www.examguru.net/ITCertification
 Copyright © ExamGuru, Inc. 2001-2006
Contact Us - Terms of Use - Privacy Policy - www.dot-net-guru.com - www.examguru.net - www.oraclesource.net - www.itinterviews.net - www.examguru.net/ITCertification