Transparency, ASP.NET, and GDI+ - Page 3

Nathan Sokalski

I am trying to create graphics with GDI+ that include transparency. However,
the transparency never seems to show up, even though my colors have an alpha
value of 0. How can I generate a graphic that is completely transparent in
certain areas (so that the web page background shows through)? I save my
graphics as gif files. I would appreciate, if possible, a simple example so
that I can see the code. Thanks.
--
Nathan Sokalski
nj********@hotm ail.com
http://www.nathansokalski.com/

Aug 11 '05

Subscribe Reply

4525

Martyn

You should ckeck out this article. It helped me a lot in over coming
problems with keeping transparency in GIF's.

http://msdn.microsoft.com/library/de...colorquant.asp

Martyn
"Nathan Sokalski" wrote:

I am trying to create graphics with GDI+ that include transparency. However,
the transparency never seems to show up, even though my colors have an alpha
value of 0. How can I generate a graphic that is completely transparent in
certain areas (so that the web page background shows through)? I save my
graphics as gif files. I would appreciate, if possible, a simple example so
that I can see the code. Thanks.
--
Nathan Sokalski
nj********@hotm ail.com
http://www.nathansokalski.com/

Aug 24 '05 #21

Similar topics

1486

Transparency, ASP.NET, and GDI+

by: Nathan Sokalski | last post by:

I am trying to create graphics with GDI+ that include transparency. However, the transparency never seems to show up, even though my colors have an alpha value of 0. How can I generate a graphic that is completely transparent in certain areas (so that the web page background shows through)? I save my graphics as gif files. I would appreciate, if possible, a simple example so that I can see the code. Thanks. -- Nathan Sokalski...

ASP.NET

3655

CODE to Test ALPHA Transparency

by: tommaso.gastaldi | last post by:

In a previous post I have been asking about a way to test Alpha Transparency. Bob and Michael have kindly provided some ideas. Here I would like to share the function I have prepared, for the purpose to improve it. Frankly, I am not clear about the exact meaning of some pixel format (max, gdi, etc.) and I hope I have put them under the right "case". I have made only some superficial test and it seems to work. Note that the purpose is...

Visual Basic .NET

9663

What is ONU?

by: marktang | last post by:

ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...

General

10404

Problem With Comparison Operator <=> in G++

by: Oralloy | last post by:

Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...

C / C++

10193

Maximizing Business Potential: The Nexus of Website Design and Digital Marketing

by: jinu1996 | last post by:

In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...

Online Marketing

10136

The easy way to turn off automatic updates for Windows 10/11

by: Hystou | last post by:

Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...

Windows Server

9979

Discussion: How does Zigbee compare with other wireless protocols in smart home applications?

by: tracyyun | last post by:

Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...

General

6761

Couldn’t get equations in html when convert word .docx file to html file in C#.

by: conductexam | last post by:

I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...

C# / C Sharp

5415

Trying to create a lan-to-lan vpn between two differents networks

by: TSSRALBI | last post by:

Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...

Networking - Hardware / Configuration

5548

Windows Forms - .Net 8.0

by: adsilva | last post by:

A Windows Forms form does not have the event Unload, like VB6. What one acts like?

Visual Basic .NET

4089

transfer the data from one system to another through ip address

by: 6302768590 | last post by:

Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system

C# / C Sharp