473,698 Members | 2,833 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Icon looses alpha channel in ListView and TreeView ImageList

According to KB article 822488


visual c# .net 2002 + 2003 has bug in rendering of alpha channel
information when displaying a 32-bit alpha-blended icon on a WinForm

According to the article a workaround exists (overriding the controls'
paint event handler) and an example is given for a Button control.

I really could use some help on achieving the workaround on a ListView
and TreeView control where I have an ImageList of 32-bit alpha-blended
Anyone, plz?
Nov 16 '05 #1
0 2558

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

by: Ian | last post by:
Hi, I've been trying to create a listview and treeview with icons. You would think it's a pretty straight forward task. API documentation states you simply assign an ImageList - that's been populated either using VS.NET (my method) or programatically. I assigned the imagelist to the small icons in the listview. Even VS.NET has been satisfied with what I'm doing as it shows the listitems/treenodes with icons. As soon as I build/run...
by: scoobydoo | last post by:
hi, I have a problem displaying icons at the right colour depthin a ListView. I've made an icon file, (using IconWorkshop 5), it has 3 icons within it. A 32x32 32bpp XP style icon, a 32x32 32bpp non-xp icon (no transparency), and a 16x16 version. I add these icons to an ImageList, which is then assigned to the LargeImageList property of the ListView.
by: yxq | last post by:
Hello The icons with the alpha channel are supported in WindowsXP. If use the System.Drawing.Bitmap.ToBitmap on the icon handle(ico.ToBitmap), the alpha channel won't be preserved, resulting in an ugly black border where the alpha area. But if the icons with the alpha channel must be show in a picuturebox, how to do? Picturebox1.Image=??? The article http://www.vbaccelerator.com/home/NET/Code/Libraries/Shell_Projects/Getting_
by: - HAL9000 | last post by:
Reference the visual basic power pack: http://msdn.microsoft.com/library/en-us/dv_vstechart/html/vbpowerpack.asp I have been using win32 SHGetFileInfoW to get icons for my "FileViewer" & "FolderViewer" as is done in the power pack code. What is unusual is that the icons are much darker than normal. You can see this in the folder icons of figure 7 on the web page - sort of a black lining.
by: techspirit | last post by:
Hi all, 1) I found out from the vb.net group that it is possible to get an associated icon for a file. My requirement is to display all programs from the Start Menu for the user along with the associated icons. While I am able to list the programs correctly, the icons that get displayed alongside are the ones for the folders. The form has listview and imagelist controls on it. I shall paste the code here. 2) I was also wondering why...
by: Vic.Dong | last post by:
Hello, all: How to draw a icon of alpha channel from CImagelist to listview control on Windows XP? B.R. VIC
by: Gardner Andersen | last post by:
I have an imagelist with 7 icons images in the collection. I am trying to assign the icons to the items in a listview. In the designer, the proper icons appear next to the listview items (a fixed collection). When I run the application, I am getting completely different icons! The icons I am getting are actually from an OLD imagelist that has been deleted and replaced by an imagelist with the same name (with new icons). I have tried...
by: giddy | last post by:
hi, I have a listview on a form, the View is set to Tile. I also have an image list tied to the *smallImageList property, i have one image in the image list, its a png : 32X32 When i do this, i dont see an icon and the SubItem text! lstvUsers.Columns.Add(Privilege");//added only so the tile detail is
by: =?Utf-8?B?QWRhbQ==?= | last post by:
I'm having a problem loading an Icon into an ImageList. When I load the icon directly it works fine, like this: Icon sourceIcon = << Get an icon from somewhere... >>; treeViewImageList.Images.Add("abc", sourceIcon); But when I first save the original icon to a stream and then try loading the
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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...
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...
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,...
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
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...
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.