Event handle problem in C# - C# Discussion Boards

Re: self starting windows service

30-Mar-06 4:16

Have you checked whether the service starts up correctly when doing it manually via control panel?

rakesh_nits30-Mar-06 19:22

rakesh_nits

30-Mar-06 19:22

Hi robert,
yes, i checked and it was starting perfectly.after being installed with installutil.any idea what is causing the problem.thanks in Advance.
Rakesh

Custom Property LOV???

FoxholeWilly30-Mar-06 2:46

FoxholeWilly

30-Mar-06 2:46

I made a user control class and added a property called "KeyboardColor" of type string to it. Currently the choices are black and white and the class will handle both, and if something else was entered post a message back saying black and white are acceptable values, then default to white.

The property can be set design time from the control's property tab, or run time with the usual control.property = "value" method.

Is there a way to make the property appear as an LOV in the property tab and/or the intellisense?

Re: Custom Property LOV???

Robert Rohde30-Mar-06 2:58

Re: Custom Property LOV???

30-Mar-06 2:58

Change the type of the property from string to something different.

If you really want only black and white then define an enum like this

public enum BOW {
Black,
White
}

Then set the return type of the property to BOW.

If you want to support all possible colors you could also set the type of the control to Color. This way the designer would show the same color picker gui as with the default ones (ForeColor/BackColor).

FoxholeWilly30-Mar-06 4:36

FoxholeWilly

30-Mar-06 4:36

Thanks a lot!

Took a little time to figure out how to use an enum, but it works great.

Setting gray background to treeview?

Dominik Reichl30-Mar-06 2:31

Dominik Reichl

30-Mar-06 2:31

Hello!

When disabling a treeview control, its background isn't set to gray automatically (in contrast to the listview control).

I want to set the color myself now (using the BackColor property of the treeview), but I don't know the color value of the "disabled" color. Any idea where to get it from?

I of course don't want to hardcode the value, it should be dependent on the current system colors...

Best regards
Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: Setting gray background to treeview?

Robert Rohde30-Mar-06 3:16

Event handle problem in C#

30-Mar-06 3:16

I'm not sure but shouldn't this simply be SystemColors.Control?

Phoen2530-Mar-06 2:16

Phoen25

30-Mar-06 2:16

Hello, may be some of you could help me. I have a winform with FormBorderStyle asigned to None (I need it in that way), and an AXWebBrowser with Dock asigned to Fill. My problem is that the MouseEnter event for the winform only work if I have a part of it visible, but in this case I must have the webbroser filling all the winform, so the event MouseEnter never work. And the webbrowser doen't have a MouseEnter event, so I can't call that event too. I need the event for enter and leaving.

I try:
((Control)this.browser).MouseEnter += new System.EventHandler(this.AlertWindow_MouseEnter);

But doesn't work !!!

Can any of your give an example of how can I implement my own mouse enter event jobs?

Any ideas??

Thanks a lot.

Picturebox scrolling from bottom to top

esumeyra30-Mar-06 2:03

esumeyra

30-Mar-06 2:03

how can i move pictureboxes on the screen vertically from bottom to top??

Sumeyra

Heeeeelp. I am novice in C# and AutoCAD

Noora :)30-Mar-06 1:59

Noora :)

30-Mar-06 1:59

hi there.
i have a project to be submited in the 20th of may.
i read many articles in this site they was good espacialy those about objectARX but for those how used AutoCAD before.
my project is small but need who knows to use these tools.

I am a new user to .net and AutoCAD 2006. I had a project that is required:
1. some 3D plans.
2. objects that are located in the plans should be linked to the databases.
3.it should run some codes if i clicked those objects and do some changes on them such as changing there colors.
4. view the plan through .net forms and deal with the objects through the viewers in the forms.

Those are the most important requirement in my project. Does AutoCAD help me to do this project????
Please help.. Cry | :((

And thanks alot.

-- modified at 8:26 Thursday 30th March, 2006

Re: Heeeeelp. I am novice in C# and AutoCAD

CWIZO30-Mar-06 10:09

CWIZO

30-Mar-06 10:09

I don't see the connection between .NET and AutoCAD...

--------------------------------------------------------
Q:What does the derived class in C# tell to it's parent?
A:All your base are belong to us!

Re: Heeeeelp. I am novice in C# and AutoCAD

Noora :)30-Mar-06 11:16

Noora :)

30-Mar-06 11:16

thanks for your replay.
but if you had read some of the articles that are uploaded to this site you will notice that there are a connection between them.
especially with autocad 2006

-- modified at 3:16 Friday 31st March, 2006

Explorer-like thumbnails

katatonius30-Mar-06 1:48

katatonius

30-Mar-06 1:48

Hi!

I've got a problem (obviously)...

Here's the thing I wanna do:

I have a directory with a lot of images (from 10 up to about 1000).
All I want is, to see the thumbnails of the pictures and, in case of a double-click, open it.

Thats it...
Shouldn't be that hard - or so I thought.

.NET doesn't have any control that can do it; at least I didn't find anything appropriate.

I tried to implement an IE browser and set the URL to "C:/example/pictures".
It works fine, but I don't see the thumbnails - just the filenames.
I can change the View to thumbnails manually, but that's not what I want.
As soon as I set a directory, it should show the thumbnails.
Is there a way to tell the browser he should show me the thumbs and not the detailed list?

I also looked for custom controls which are able to show thumbnails.
I found three kinds of websites.
There are the sites which have awesome looking controls (altough I don't know about the performance), but you have to pay for them.
Then there are the custom control tutorials, but I didn't find anything helpful.
At last (but not least), there are some free controls, but they aren't capable to do the thing i need to.

And now I'm out of ideas...

Do you guys have helpful tutorials, hints, links or ideas about how to solve this problem?

Thanks!!
katatonius

Re: Explorer-like thumbnails

Robert Rohde30-Mar-06 3:20

Re: Explorer-like thumbnails

30-Mar-06 3:20

Probably this[^] helps.

katatonius2-Apr-06 23:34

katatonius

2-Apr-06 23:34

Hi!

Thanks for the help!

I tried to implement it, but it seems harder than I thought.
Also, the demo-project uses over 100MB of memory if I add about 500 small pictures.

Isn't there a way to just change the "View" (I think it's called view, as I work with the german version) of a webbrowser-control to Thumbnails???

Thanks,
Manfred

Encryption/Decryption of files instantly

zorro.tmh30-Mar-06 1:28

30-Mar-06 1:28

Hello...

I'm working on a project that requires encrypting some files and deliver them to users that uses an application that I developed to decrypt them, read them and then when the user exits the application those decrypted files are deleted.

The problem here is that the application that decrypts data stores the decrypted files on the user's hard disk... if the users figures out the path of the decrypted files he can copy them and I don't want him to do that Sniff | :^)

The Question is:
Is there any way to do that decryption process without storing the decrypted files on user's hard disk?!!

Thanks in advance. Smile | :)

Le centriste30-Mar-06 3:59

Le centriste

30-Mar-06 3:59

Do you have sample code that produces the decrypted file on disk?

--------

"I say no to drugs, but they don't listen."
- Marilyn Manson

zorro.tmh30-Mar-06 8:05

30-Mar-06 8:05

I'm using the code from http://www.codeproject.com/csharp/cryptosafe.asp

Le centriste30-Mar-06 8:13

Le centriste

30-Mar-06 8:13

There is a part that says:

fout = new FileStream(outName, FileMode.Create, FileAccess.Write);

Replace it with:

MemoryStream mout = new MemoryStream();

And also, replace:

//Read from the encrypted file and write dercypted data
        while(true)
        {
            len = decStream.Read(bin,0,bufLen);
            if (len == 0)
                break;
            fout.Write(bin,0,len);
            rdlen += len;
            fireMessage(inName,(int)totlen,(int)rdlen);
        }

with:

//Read from the encrypted file and write dercypted data
        while(true)
        {
            len = decStream.Read(bin,0,bufLen);
            if (len == 0)
                break;
            mout.Write(bin,0,len);
            rdlen += len;
            fireMessage(inName,(int)totlen,(int)rdlen);
        }

Remember to carry the variable mout around to have access to the decrypted data. I also suggest that you set all mout bytes to zero, so when the program exits, the decrypted data does not stick in memory:

<code>
mout.Position = 0;
for (int i = 0; i < mout.Length; ++i) mout.WriteByte((byte)0);

--------

"I say no to drugs, but they don't listen."
- Marilyn Manson

zorro.tmh31-Mar-06 22:06

31-Mar-06 22:06

Dear Michel,

Thank you very much. I'll try this up and will inform you with the results Big Grin | :-D

Thank you again.

zorro.tmh1-Apr-06 23:00

1-Apr-06 23:00

Dear Michel,

How can open the retuned MemoryStream Object ? in my case this object is a video file and I want to play it in media player .. the media player needs a path .. how can I get the path ?

Thanks in advance .