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Re: Add Reference

Not Active2-Dec-02 2:50

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2-Dec-02 2:50

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Re: Add Reference

Kannan Kalyanaraman2-Dec-02 2:58

Kannan Kalyanaraman

2-Dec-02 2:58

I think to make it com under the .net tab, the assembly has to be signed with a strong key and also there is a registry entry where you need to specify the location of the assembly. Anyway, I do not know the particulars.

Cheers
Kannan

Re: Add Reference

grv5752-Dec-02 14:01

grv575

2-Dec-02 14:01

Yeah it will appear under the com tab if you select the register for com interop configuration property but I can't find out how to do the same for .net interoperability. It can be done though since third party libraries appear under the .net tab.

Persisting Property of userdefined Collection type.

zorifila2-Dec-02 0:51

zorifila

2-Dec-02 0:51

Hi,

I have exposed a property in a UserControl.
The Property is of Collection type. ( Collection of my Userdefined type).
When I use this Control in a Form, the Forms Designer allows me to Edit the
property (MyValues) using the Default Collection Editor UI.
But the Changes made to the Collection are not persisted in the Form code
by the Forms Designer.

//------------------------------------
class MyControl : UserControl
{

MyTypeCollection m_values = new MyTypeCollection(); 

public MyTypeCollection MyValues
{
   get
   {
      return m_values ;
   }
   set
   {
      m_values  = value;
   }
}

}

//------------------------------------

class MyTypeCollection : CollectionBase
{
Add(){...}
Remove(){...}
}

//------------------------------------

class MyType
{
int i;
bool b;

public int XXX
{
   get
   {
      return i;
   }
   set
   {
      i= value;
   }
}

public bool YYY
{
   get
   {
      return b;
   }
   set
   {
      b= value;
   }
}

}

How can I make the Forms Designer generate code for the Collection Modified at Design time.
Please someone Help me...

Zor

Re: Persisting Property of userdefined Collection type.

xicoloko2-Dec-02 4:26

xicoloko

2-Dec-02 4:26

Zor,

Try to add the following attribute to your property:

[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]

Cheers,
- xico -

Image into MS-Access Database

shokisingh1-Dec-02 23:18

shokisingh

1-Dec-02 23:18

Can anybody help in :
1) inserting a bitmap image into ms-access database
2) setting a picture box with a image from the database.

Please help me, i have been hitting on this for 2 days. Confused | :confused:

Ashok Singh
Real Programmer's do not comment their code, if it is hard to write then it should hard to understand

Re: Image into MS-Access Database

Mazdak2-Dec-02 0:40

Mazdak

2-Dec-02 0:40

There is an article about do this with SQLServer,access is the same:

C# Photo Album Viewer

Mazy

"And the carpet needs a haircut, and the spotlight looks like a prison break
And the telephone's out of cigarettes, and the balcony is on the make
And the piano has been drinking, the piano has been drinking...not me...not me-Tom Waits

Creating a new process

suresh_sathya1-Dec-02 20:55

suresh_sathya

1-Dec-02 20:55

how to create a new process in program like createprocess api in vb,or vc++

Re: Creating a new process

James T. Johnson1-Dec-02 21:17

James T. Johnson

1-Dec-02 21:17

Lookup the System.Diagnostics.Process class in MSDN, should give you the info you need.

James

- out of order -

Anyone get CreateControl() to work?

Jeff J1-Dec-02 18:19

Jeff J

1-Dec-02 18:19

No matter what I've tried, calling CreateControl() on a form or ctrl, does not force the creation of a handle, as the docs say. The only thing I found that does, is the usual Show() (or ShowDialog) method. The problem is, I need to modify some things before the form becomes visible, which are not callable until a handle is created (understandably).

Could someone please prove Microsoft right, and make me eat my words? Or at least verify my findings?

Cheers

Image edit

Smitha Nishant30-Nov-02 23:54

Smitha Nishant

30-Nov-02 23:54

Hello,

I am trying to do an image editing app.
It requires opening and displaying an image and then selecting a portion of the image for crop. I also want to rotate the image.

(1)How will I implement "area selection" [click and drag to mark an area] for an image ?
(2)Which will be the best control to display the image, for edit operations?

Thanks,
Tweety

It's easy to sit there and say you'd like to have more money. And I guess that's what I like about it. It's easy. Just sitting there, rocking back and forth, wanting that money.

Re: Image edit

Christian Graus1-Dec-02 16:22

Christian Graus

1-Dec-02 16:22

Tweety wrote:
How will I implement "area selection" [click and drag to mark an area] for an image ?

Draw the image, store the co-ordinates you've dragged, and draw them onto the window ( not onto the image ), so they are lost with every refresh and do not affect the image.

Tweety wrote:
Which will be the best control to display the image, for edit operations?

Just whack it right onto your window.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Re: Image edit

Smitha Nishant2-Dec-02 18:01

Smitha Nishant

2-Dec-02 18:01

Thanks CG for the help.

Christian Graus wrote:
Just whack it right onto your window.

Isn't there any image control that will scroll and show the original image ?

Tweety.

It's easy to sit there and say you'd like to have more money. And I guess that's what I like about it. It's easy. Just sitting there, rocking back and forth, wanting that money.

sscanf equivalent in C#?

roybrew30-Nov-02 16:18

roybrew

30-Nov-02 16:18

Does anyone know of a sscanf (Old C-runtime function) equivalent in C#?

Regards,

Roy

_____________
Roy H. Berger
roybrew@att.net

Re: sscanf equivalent in C#?

David Stone30-Nov-02 18:22

David Stone

30-Nov-02 18:22

Use the System.Convert class. There's a bunch of stuff in there that will let you convert from one data type to another.

I don't know whether it's just the light but I swear the database server gives me dirty looks everytime I wander past.
-Chris Maunder

Microsoft has reinvented the wheel, this time they made it round.
-Peterchen on VS.NET

Re: sscanf equivalent in C#?

Nick Parker30-Nov-02 18:37

Nick Parker

30-Nov-02 18:37

roybrew wrote:
Does anyone know of a sscanf (Old C-runtime function) equivalent in C#?

As David said you can use the Convert class however sscanf provided more of a parsing technique than what you will probably find with Convert. You may wish to look into the RegEx (regular expressions) class as that's where the power will come from (;P). Here is a quick article to read up on if you are new to regular expressions.
C# Regular Expressions [^]

Nick Parker

Re: sscanf equivalent in C#?

David Stone30-Nov-02 19:13

David Stone

30-Nov-02 19:13

Nick Parker wrote:
sscanf provided more of a parsing technique than what you will probably find with Convert

Forgive me for not brushing up on my C libraries.;P

Re: sscanf equivalent in C#?

roybrew1-Dec-02 5:24

roybrew

1-Dec-02 5:24

I'll look at RegEx. The parsing is what I am looking for. I've looked at Convert. Maybe a combination of both ?? Basically, I'm parsing comma delimited data (text, numeric, date, etc.).

Thanks for the suggestions.

Regards,

Roy

_____________
Roy H. Berger
roybrew@att.net

Re: sscanf equivalent in C#?

Shaun Wilde2-Dec-02 4:24

Shaun Wilde

2-Dec-02 4:24

try the Split method on string to break it up into little strings

Stupidity dies.
The end of future offspring.
Evolution wins.
- A Darwin Awards Haiku

Net Send

Bugoy29-Nov-02 19:03

Bugoy

29-Nov-02 19:03

Does anybody know how to do "NET SEND" using C#?

Re: Net Send

Tomtomm29-Nov-02 23:39

Tomtomm

29-Nov-02 23:39

[DllImport("Netapi32.dll", CharSet=CharSet.Auto)]<br />
private static extern int NetMessageBufferSend(string servername,string<br />
msgname,string fromname,string buf,int buflen);<br />
<br />
string msg = "My text";<br />
NetMessageBufferSend(null,"remotePC",null,msg,msg.Length*2+2);

Hope this helps !

Tomtom

About threads and forms...

GriffonRL29-Nov-02 6:16

GriffonRL

29-Nov-02 6:16

Hello,

I wrote a program who is not UI dependent. I have all my program logic in a class and I raise some events for any potential frontend.
I can then create a console application or a Windows form application using the same program logic.
The frontend just run a thread using the run() function of my main class (UI independent) which do all the job.
This main class also creates internally several threads performing various tasks in parallel. Since all this threads are just pure computation I have no problems.
But I recently wanted to create forms in some of these internal threads running in parallel and I have been unsuccessful for far Frown | :(

What happens is that forms get created but are not responsive at all and the internal threads get stuck. How can I create these forms and make them run independently in each thread ?

Here is schema:

Frontend (Console or Form, main thread)
|
|
Main class (running in a thread)
| | | | |
| | | | |
Child threads (computation)
x x x x x <-- child threads can not work with forms
x x x x x <-- how to call functions in those forms ?
Child threads forms

Any idea ?

R. LOPES
Just programmer.

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