Displaying a 32bit bitmap with Alpha channel transparency - C# Discussion Boards

AndyInUK9-Feb-12 3:14

9-Feb-12 3:14

Is there anyway to create a executable file that support mac ?

I know there are few third party softwares that can help running exe files on mac. But is there any direct way?

Thanks

Re: executable file

BobJanova9-Feb-12 3:53

BobJanova

9-Feb-12 3:53

Do you count Mono? That's the only way to get C#/.Net applications to run on Unix variants (which includes Mac OS).

Message Removed

9-Feb-12 5:29

N_tro_P

9-Feb-12 5:29

Message Removed

Re: executable file

raven198529-Feb-12 13:11

raven19852

9-Feb-12 13:11

mono though does not cover all the things that .net does. So bare in mind you might have to do some things on your own whereas at .net its already been done.

Δημιουργία websites, web εφαρμογών και εφαρμογών ηλεκτρονικού υπολογιστή. http://www.remiakstudio.gr

Re: executable file

BobJanova9-Feb-12 22:04

BobJanova

9-Feb-12 22:04

Mono covers pretty much anything you'd actually want to use. (See here[^].) The only major omissions are WPF and Entity Framework.

how to reverse string on column - datagridview

goldsoft9-Feb-12 2:22

goldsoft

9-Feb-12 2:22

hi
i have this code:

private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
 {
  if (e.Value != null)
  {
   string l_value = e.Value.ToString();
   char[] l_array = l_value.ToCharArray();
   Array.Reverse(l_array);
   e.Value = new string(l_array);
  }
 }

it reverse all of the datagridview
i need only column 2 that be reverse

how to change this code ?
thanks in advance

Re: how to reverse string on column - datagridview

_AnsHUMAN_ 9-Feb-12 2:32

_AnsHUMAN_

9-Feb-12 2:32

This because you are doing it in a function that would be called for every cell and hence the reversal on all values for all columns

You talk about Being HUMAN. I have it in my name
AnsHUMAN

Displaying a 32bit bitmap with Alpha channel transparency

__John_9-Feb-12 2:14

__John_

9-Feb-12 2:14

Hi,

I want to display(on a Form) a 32bit bitmap with Alpha channel transparency, so thet the transparency is honoured.

I have tried a Picture control but it ignores the Alpha channel.

Any ideas?

Thanks - John

“If I had asked people what they wanted, they would have said faster horses.”
― Henry Ford

Re: Displaying a 32bit bitmap with Alpha channel transparency

Pete O'Hanlon9-Feb-12 2:59

Pete O'Hanlon

9-Feb-12 2:59

What format is the image? As far as I'm aware a bitmap doesn't support the alpha channel in Windows, but you would rather manage it using a chroma key (that's where you choose one colour as being transparent). If it is a bitmap, then you might want to try out the code sample here[^]

If you are using a PNG (for instance), then just set the appropriate PixelFormat, i.e. PixelFormat.Format32bppArgb;

*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility

Re: Displaying a 32bit bitmap with Alpha channel transparency

__John_9-Feb-12 4:07

__John_

9-Feb-12 4:07

Thanks Pete,

The image format is 32bit bmp. But I could easly change it to png using Gimp.
Where does PixelFormat come from?
I checked Image.PixelFormat on msdn...
http://msdn.microsoft.com/query/dev10.query?appId=Dev10IDEF1&l=EN-US&k=k(SYSTEM.DRAWING.IMAGE.PIXELFORMAT);k(TargetFrameworkMoniker-%22.NETFRAMEWORK%2cVERSION%3dV4.0%22);k(DevLang-CSHARP)&rd=true[^]

All it does is show how to call ToString() on it (why do they bother).

Thanks - John

“If I had asked people what they wanted, they would have said faster horses.”
― Henry Ford

Re: Displaying a 32bit bitmap with Alpha channel transparency

Pete O'Hanlon9-Feb-12 4:24

Pete O'Hanlon

9-Feb-12 4:24

PixelFormat is an enumeration[^].

*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility

Re: Displaying a 32bit bitmap with Alpha channel transparency

__John_9-Feb-12 4:46

__John_

9-Feb-12 4:46

Image.PixelFormat

Has no Set method it can only be read.

“If I had asked people what they wanted, they would have said faster horses.”
― Henry Ford

Re: Displaying a 32bit bitmap with Alpha channel transparency

harold aptroot9-Feb-12 4:26

harold aptroot

9-Feb-12 4:26

Just FYI, 32bit BMP is almost universally unsupported. Even by image manipulation programs.

Re: Displaying a 32bit bitmap with Alpha channel transparency

__John_9-Feb-12 4:53

__John_

9-Feb-12 4:53

Yeh, I see what you mean.
You would think by now that there would be a standard way of handling transparency, but ther isn't. its all over the place, Alpha channels, transparency masks of every posible value ever known, what a can of worms it is.

“If I had asked people what they wanted, they would have said faster horses.”
― Henry Ford

Re: Displaying a 32bit bitmap with Alpha channel transparency

harold aptroot9-Feb-12 5:08

harold aptroot

9-Feb-12 5:08

Transparency is a lot easier in WPF than in Windows Forms, would it be possible to convert the program to WPF?

Re: Displaying a 32bit bitmap with Alpha channel transparency

BillWoodruff9-Feb-12 20:28

BillWoodruff

9-Feb-12 20:28

__John_ wrote:
You would think by now that there would be a standard way of handling transparency

I'm glad to see there are optimists still afloat ! Smile | :)

imho, using PNG's with transparency has become a standard: they work in .NET, they work on the web.

best, Bill

"The first principle is that you must not fool yourself, and you are the easiest person to fool." Richard Feynman

Re: Displaying a 32bit bitmap with Alpha channel transparency

SledgeHammer019-Feb-12 5:13

SledgeHammer01

9-Feb-12 5:13

Pete O'Hanlon wrote:
As far as I'm aware a bitmap doesn't support the alpha channel in Windows

Since when? Bitmaps (BMP) have supported the alpha channel for probably close to a decade or more.

Re: Displaying a 32bit bitmap with Alpha channel transparency

Pete O'Hanlon9-Feb-12 5:22

Pete O'Hanlon

9-Feb-12 5:22

Note the careful use of Windows here - it's not the problem with Bitmaps, it's a problem with Windows.

*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility

How to get value from Reorder List Ajax control?

Manish_Kumar_Nayak9-Feb-12 2:10

Manish_Kumar_Nayak

9-Feb-12 2:10

How to get value from Reorder List Ajax control?
I am using link Button to Bind and display ID field and wants to get that ID when I m going to click on link Button.
It doesn't give any response by clicking on it.
please help me..... Frown | :(

How to get value from Reorder List Ajax control?

Manish_Kumar_Nayak9-Feb-12 18:40

Manish_Kumar_Nayak

9-Feb-12 18:40

pls some body help.......

Start any Application(Say Skype) on remote machine using c# language .

Ashish payghan8-Feb-12 22:34

Ashish payghan

8-Feb-12 22:34

Hi,
I want code in c# language that start application on remote machine.
Please suggest me for c# not vbScript.

Thanks
Ashish

Re: Start any Application(Say Skype) on remote machine using c# language .

Pete O'Hanlon8-Feb-12 23:29

Pete O'Hanlon

8-Feb-12 23:29

One way to do this is to use WMI, which involves adding a reference to System.Management. This is what your code might look like:

public void StartRemoteProcess(string address, string processName, string userName, string password)
{
  object[] processes = { processName };
  ConnectionOptions connection = new ConnectionOptions{ Username = userName, Password = password };
  ManagementScope scope = new ManagementScope(string.Format(@"\\{0}\root\cimv2", address), connection);
  using (ManagementClass mc = new ManagementClass(scope, new ManagementPath("Win32_Process"),
    new ObjectGetOptions()))
  {
    mc.InvokeMethod("Create", processes);
  }
}

*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

My blog | My articles | MoXAML PowerToys | Mole 2010 - debugging made easier - my favourite utility

Re: Start any Application(Say Skype) on remote machine using c# language .

Dave Kreskowiak9-Feb-12 2:07

Dave Kreskowiak

9-Feb-12 2:07

You cannot launch an interactive process on a remote machine. This is for security reasons. Think about it.

The process will launch, IF you have admin rights to the target machine, but the user on the remote machine will not be able to see or use it.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak

Re: Start any Application(Say Skype) on remote machine using c# language .

PIEBALDconsult9-Feb-12 2:17

PIEBALDconsult

9-Feb-12 2:17

I suspect he wanted to launch a video app to spy on the other end. Suspicious | :suss:

Re: Start any Application(Say Skype) on remote machine using c# language .

BillWoodruff9-Feb-12 20:31

BillWoodruff

9-Feb-12 20:31

+5 for the assumption of guilt, which doesn't waste the time it would take to examine the facts, or require ridiculous ceremonies like trial-by-jury, or absurd philosophies like "presumption of innocence."

Smile | :)

best, Bill

"The first principle is that you must not fool yourself, and you are the easiest person to fool." Richard Feynman

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