C# Discussion Boards - CodeProject

ListView with Windows Control Library

22-Feb-04 11:19

fd97207 wrote:
how to find out how much graphics card memory and how much RAM I have?

I think you can find it here:

http://www.codeproject.com/csharp/wmi.asp[^]

Mazy

"A bank is a place that will lend you money if you can prove that you don't need it." - Bob Hope

Snowjim22-Feb-04 6:51

Snowjim

22-Feb-04 6:51

Hej

Is it posible to have a Windows Control Library(controller) in a listview like an item?

ex
I whant to make a ListView that can show all the tabels that you could play the boardgame at. So if i make a controller that shows whos playing on this board(table) and what game thay are playing(by icons) and then i whant this controller to be in the ListView.

I will need about 50 controls in the ListView, do i have to make my own ListView control or do the original ListView control be abled to contain this controllers?? and if so, where can i find information about this?

//Jimmy

Working with pixels and palette

Stephane David22-Feb-04 5:24

22-Feb-04 5:24

Hello,

I'm trying to program a "clone" of civilization III, using only C# and GDI+ (kind of exercice to learn).

I've manage to make a functional map and map editor, and I'm trying to animate the sprites.

It works, except for two things : shadows and player color.

My animation are 256 colors storyboard. I know that the last 20 indexes are used for shadows.

Question 1: how can I know with C# and GDI+ what is the index in the palette of a pixel?
The GetPixel function gives the color, not the index.

Question 2 : How can I use an alphablending effect, but only on some indexes of the palette? Is it possible?

Question 3 : for player color, how can I replace the 10th index color in the palette by another color? Supposing player color is the 10th index of course.

Thanks

Heath Stewart23-Feb-04 9:29

Heath Stewart

23-Feb-04 9:29

If you want alpha blending, you'll need to use 32-bit color where the high 8 bits is the alpha channel. These are per-pixel.

If you want to get the palette index for a color, first get the Color as you're doing. Then you'll need iterate through the ColorPalette.Entries for the Image.Palette:

Color pixel = bmp.GetPixel(0, 0);
ColorPalette palette = bmp.Palette;
for (int i=0; i<palette.Entries.Length; i++)
  if (palette.Entries[i].Equals(pixel)) return i;
return -1;

Microsoft MVP, Visual C#
My Articles

Stephane David23-Feb-04 19:48

23-Feb-04 19:48

Thanks for the answer, but it won't work.

I know that in the palette the last index is the transparency color, whatever the actual color. It is usually magenta, but it could be something else. And if it is Magenta, but the first color is also magenta, then only some pixels (last index) must be transparent, the other one (first index) must remain magenta.

That's why I'd like to get the actual index, and not only the color

Stephane David23-Feb-04 21:55

23-Feb-04 21:55

I've found a solution to one of my problem.

Bitmap.Palette return a copy of the palette.

So I need to do

ColroPalette palette = bmp.Palette;
palette.Entries[0] = Color.FromArgb(150,255,255,255);
bmp.Palette = palette;

And then it works, even for the alphablending, and the picture is 8bpp indexed, it doesn't need to the 32-bit color.

However, your solution to get the index of a pixel will not work, as I can have several indexes in the palette with the same color, but they must be processed differently.

For instance, the last index is the background color and must be 100% transparent. But if it is magenta, and the 76th index is also magenta, then only the background must become transparent, and the 76th inndex must remain magenta

Heath Stewart24-Feb-04 3:03

Heath Stewart

24-Feb-04 3:03

Sorry, but in most cases it will work. Palettes don't usually contain the same color more than once. Sure, I suppose they could - but it's atypical. All the graphics programs I've worked with - and quite a bit - like Photoshop (last 4 versions), GiMP, and a handful of lesser-known programs consolidate the palette for space and because it's usually pointless to have more of the same color in a palette. So, just because it doesn't work for your atypical example, don't say it doesn't work.

Microsoft MVP, Visual C#
My Articles

Stephane David24-Feb-04 3:40

24-Feb-04 3:40

Sorry if I was a bit offensive. Your solution works, but not in my particular case, because it is quite likely that the palette contains several identical colors, and there should be used as different color by the software.

Eject DVD-drive

Stefan Troschuetz22-Feb-04 4:53

Stefan Troschuetz

22-Feb-04 4:53

Hi!

I'm looking for a method which i can use to eject my DVD-drive. If C# doesn't provide this functionality, maybe someone knows an API-call.

THX

Re: Eject DVD-drive

Mazdak22-Feb-04 5:03

[COM]DrCOM-Monitor Tool and more?[COM]

22-Feb-04 5:03

There is a sample code in C++ in MSDN,youu can use thos API,search this topic in MSDN:

HOWTO: Ejecting Removable Media in Windows NT/Windows 2000

Mazy

"A bank is a place that will lend you money if you can prove that you don't need it." - Bob Hope

kenokabe22-Feb-04 3:17

kenokabe

22-Feb-04 3:17

Hi,

My first post here...

DrCOM Monitor tool
http://www.ddevel.com/DrCOM/DrCOMMonitor.asp

I found this somewhat useful.

Let me tell you what I'm strugling now.
I'm a system trader. I currently connect my C# application to a broker trading application which has API. However, since I found another good broker/trading platform, I'm considering to switch for it. The problem is this trading application of the broker does not have API.
The target software is 100% COM based. All of the component is accessible. The whole software part is built on COM servers/dll.
At first, I tried to study the COM classes which I can browse in VS.net2003 object browser, but it's way too complicated and needs a security key in proccess, so I gave up to build from zero. Instead, I had changed the approach to hooking COM while the existing target software is working normally.

I found DrCOM and ran the target software, then I could 'INVOKE' a command such as Object.SendLogout(). The software actually had logged out from the server, and that is controled by the external tool. Wonderful, I felt.

However, I still cannot figure out the detail between COM and the target application.
DrCOM shows which Object/Class responses, but does not show which Ojbect/Class-method is called from the target app.
Plus, I don't know how to build C# app invoking the object command/picking the object event.

I have read these 2 extraordinary articles expecting they would help me

http://www.codeproject.com/system/hooksys.asp
http://www.codeproject.com/com/automatingwindowsapps.asp

however, the both are on Win32 API and a little different from what I need.

Well, I've been doing this for 2 weeks straight, but almost give up.
Anyone can suggest me a better tool than DrCOM, or how I can create such invoking capability by C#, or any good resources?

Thank you very much. Any comments are wecome Hmmm | :|

Ken

PS. I tried TracePlus software already.

Mazdak22-Feb-04 4:11

22-Feb-04 4:11

kenokabe wrote:
http://www.codeproject.com/system/hooksys.asp

C# version:

http://www.codeproject.com/csharp/NetWin32Hooks.asp[^]

Mazy

"A bank is a place that will lend you money if you can prove that you don't need it." - Bob Hope

kenokabe22-Feb-04 14:18

kenokabe

22-Feb-04 14:18

Thank you Mazy,

This is still tweaking some Win32 level, I still don't know how to interact to COM.
Oh well, I may be going to wait thier API reliease.

Ken

Mazdak22-Feb-04 19:01

22-Feb-04 19:01

kenokabe wrote:
I still don't know how to interact to COM

To use COM dll in your class,write click you reference and select COM tab and select your dll fromm it,it create a wrapper for you to use you dll in .net.

Mazy

"A bank is a place that will lend you money if you can prove that you don't need it." - Bob Hope