predifined array of structures in C#? - C# Discussion Boards

iqueiroz22-Feb-07 23:15

22-Feb-07 23:15

I writing a component designer and I need to get all Namespaces in my Solution, or all assemblys.
The keyword global have all namespaces, exists any method or property to get this list?

Thanks!

Recognize sounds from midi

sharpiesharpie22-Feb-07 23:12

sharpiesharpie

22-Feb-07 23:12

how can i recognize the sounds from a midi file with C#? like, the frequency etc.? is there a way to do it?

Re: Recognize sounds from midi

Christian Graus23-Feb-07 0:00

Christian Graus

23-Feb-07 0:00

C# has no MIDI support that I know of. DirectSound does. Given that a MIDI file is not a wave, you can surely get the pitch out of it, it's encoded in there. Your sound card decides what the notes sound like, the MIDI file contains their values and durations.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Re: Recognize sounds from midi

Leslie Sanford24-Feb-07 9:28

Leslie Sanford

24-Feb-07 9:28

sharpiesharpie wrote:
how can i recognize the sounds from a midi file with C#? like, the frequency etc.? is there a way to do it?

I have a MIDI toolkit[^] in C# that might help. There's a class in there somewhere for converting to and from frequencies based on the MIDI note. As far as recognizing sounds, most MIDI file tracks have a program change message at the beginning of the track to indicate which instrument to use.

Search binary string?

Monk11122-Feb-07 22:45

Monk111

22-Feb-07 22:45

I want to search a binary number and take a certain action whenever I come across a 1. How do I iterate through the binary number? Do I need to convert it into some kind of array first?

Thanks,

Monk

Re: Search binary string?

Stefan Troschuetz22-Feb-07 23:08

Stefan Troschuetz

22-Feb-07 23:08

Monk111 wrote:
How do I iterate through the binary number? Do I need to convert it into some kind of array first?

Of which data type is the binary number? [edit]Forget that question. Should have read the subject more thoroughly.[/edit] If it's a string, you can use simple array syntax to iterate over the single chars:

String binary = "00101011100";
for (int i = 0; i < binary.length; i++)
{
  if (binary[i] == '1')
  {
    // Take your certain action.
  }
}

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook

www.troschuetz.de

Re: Search binary string?

Christian Graus22-Feb-07 23:11

Christian Graus

22-Feb-07 23:11

If it's a string, then use the search functions build in to the string class to find the index of the 1s.

If it's a number, then it's just a number, but you want to use it as a bit mask. Use the && operator. If x && 1 = true, then the first bit is set, x && 2 checks the second, x && 4, x && 8, etc.

predifined array of structures in C#?

bouli22-Feb-07 22:22

bouli

22-Feb-07 22:22

Hello gurus,

I'd like to know how is it possible to declare a predefined array of structure in C#?

The C declaration is like this:

typedef struct st_move_def {<br />
	int byte;<br />
	int bit;<br />
} MOVE_DEF ;<br />
<br />
static MOVE_DEF move_tab [8][8] = {<br />
	{ {5, 8}, {3, 4}, {7, 6}, {4, 7}, {6, 3}, {2, 8}, {1, 5}, {8, 3} },	/*1*/<br />
	{ {8, 4}, {4, 5}, {2, 4}, {7, 8}, {1, 3}, {6, 5}, {5, 1}, {3, 2} },	/*2*/<br />
	{ {4, 1}, {2, 2}, {3, 3}, {1, 7}, {5, 2}, {7, 7}, {8, 6}, {6, 6} },	/*3*/<br />
	{ {7, 5}, {5, 6}, {1, 4}, {8, 2}, {2, 7}, {6, 1}, {4, 8}, {3, 1} },	/*4*/<br />
	{ {8, 8}, {1, 6}, {2, 1}, {6, 7}, {4, 2}, {7, 1}, {3, 5}, {5, 4} },	/*5*/<br />
	{ {3, 7}, {5, 7}, {6, 2}, {1, 2}, {7, 3}, {2, 6}, {4, 6}, {8, 1} },	/*6*/<br />
	{ {6, 4}, {8, 5}, {7, 2}, {5, 3}, {1, 1}, {3, 8}, {2, 5}, {4, 4} },	/*7*/<br />
	{ {3, 6}, {4, 3}, {6, 8}, {2, 3}, {8, 7}, {1, 8}, {5, 5}, {7, 4} }	/*8*/<br />
};

and I need to translate it into C#.

How can I do this please?

Best regards.

Fred.

There is no spoon.

Re: predifined array of structures in C#?

Christian Graus22-Feb-07 22:27

Christian Graus

22-Feb-07 22:27

I think you need to do this:

{ new MOVE_DEF(5,8), new MOVE_DEF (7,6, etc

Re: predifined array of structures in C#?

bouli22-Feb-07 22:45

bouli

22-Feb-07 22:45

Hi,

Thanks for your answer.

Is there a "static" way to initialize the members like in C/C++?

Best regards.

There is no spoon.

Re: predifined array of structures in C#?

Christian Graus22-Feb-07 23:38

Christian Graus

22-Feb-07 23:38

Not that I know of

Re: predifined array of structures in C#?

bouli22-Feb-07 23:39

bouli

22-Feb-07 23:39

ok,
thanks.

I have done a class and made some "new" on it. it seems to work Smile | :)

Best regards.

There is no spoon.

Re: predifined array of structures in C#?

Luc Pattyn23-Feb-07 10:13

Luc Pattyn

23-Feb-07 10:13

Hi,

you can have a "static constructor" containing code to initialize static members (including
const).

AFAIK you must be careful when a static constructor calls onto another class that also
has a static constructor, I think there is some unwanted behavior then. But it works well
in simple cases.

Smile | :)

Luc Pattyn

[My Articles]

Referencing a dll or ActiveX Control in .net

salon22-Feb-07 22:06

salon

22-Feb-07 22:06

I have to make an ActiveX control so tht I can use it in other applications.I referred following link

http://www.c-sharpcorner.com/UploadFile/dsandor/ActiveXInNet11102005040748AM/ActiveXInNet.aspx

Followed exactly same steps.
i made a class library and referenced its dll in another webform where i m using the members of
the class library through Javascript.but the members are not accessible in Javascript.i.e.

function doScript()
{
myControl1.UserText = Form1.txt.value;
}
in this javascript function the UserText member is not getting called.
What's the mistake i m making?

Re: Referencing a dll or ActiveX Control in .net

Christian Graus22-Feb-07 22:30

Christian Graus

22-Feb-07 22:30

If you have to use ActiveX ( for VB6 or something ), you should use C++. Using C# means you still need .NET, what's the point in that ?

Re: Referencing a dll or ActiveX Control in .net

salon22-Feb-07 22:38

salon

22-Feb-07 22:38

actually my aim is to make an ActiveX control which have a listbox and some command buttons.I have done it in both C# and VB6.0
for C# i referred
http://www.c-sharpcorner.com/UploadFile/dsandor/ActiveXInNet11102005040748AM/ActiveXInNet.aspx
and for VB6.0 i referred
http://cuinl.tripod.com/tutorials/ocx-11.htm
and followed the same steps.
My application should work like this:
ActiveXcontrol1(Listbox and Refernce to ActiveXcontrol2 as a command button)-> Click CommandButton1 (let's say "open File") ->Goto ActiveXcontrol2->Click CommandButton Cancel->Return to ActiveXcontrol1

or

ActiveXcontrol1-> CommandButton1->ActiveXcontrol2->OK->Perform some action

When I include the .ocx file of ActiveXcontrol2 through Project->Components and the control appears in toolbox and drag the control and place it on the ActiveXcontrol1 and click on the commandbutton to display the ActiveX control2 i.e. the control with some stuff and OK and Cancel button, this is not getting displayed.

i.e. not calling the ActiveX Control2.
Language is not a problem! i can make it in C# or in VB6.0.But i m not able to do tht!

Hex to binary?

Monk11122-Feb-07 21:24

Monk111

22-Feb-07 21:24

Is there a standard function to convert a hex to a binary value?

Thanks,

Monk

Re: Hex to binary?

Sylvester george22-Feb-07 22:16

Sylvester george

22-Feb-07 22:16

These are the links

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

http://www.codeproject.com/useritems/HexConversion.asp[^]

Regards,
Sylvester G
Senior Software Engineer
Xoriant Solutions
sylvester_g_m@yahoo.com

Re: Hex to binary?

blackjack215022-Feb-07 22:16

blackjack2150

22-Feb-07 22:16

I don't know if there's a .NET function for this, but if you can't find any, it's very easy to convert from hex to binary "by hand".

Here's how to do it. As you should know, the hexadecimal system has 16 digits: 0,1,...,9,A,B,..,F, therefor 4 bits are necessary to convert each hex digits.

So:
Hex Binary
0 0000
1 0001
2 0010
3 0011
. .
. .
. .
F 1111

In order to covert an array from hex to binary, you just read each hex digit one by one and replace it with the 4 bits which correspond to it. Of course, the resulting binary array will be 4 times longer than the original hex array.

Hope that helps.

Re: Hex to binary?

Christian Graus22-Feb-07 22:26

Christian Graus

22-Feb-07 22:26

If it's hex, it must be a string ( otherwise it would just be a number ). So, I'm not sure if int.Parse will take hex, you may have to write something. To convert a number to it's binary representation, string.Format will be just fine ( that is, there are format strings for that ).

There is finish painting event?

aukh22-Feb-07 21:17

aukh

22-Feb-07 21:17

I have a user control that contains a lot of controls,
while the printing of these controls didn't finish yet, the program starts the on_paint() and do it again after finishing the paint...

I want to catch the finish painting or other way to do it

aukh

Re: There is finish painting event?

Christian Graus22-Feb-07 23:39

Christian Graus

22-Feb-07 23:39

There is no such event. If you're doing your own painting, you can obviously add one.

Re: There is finish painting event?

Luc Pattyn23-Feb-07 10:20

Luc Pattyn

23-Feb-07 10:20

Hi,

I'm not sure what your problem would be, normally all painting is (or should be) done
by the UI thread. So the paint methods dont have to be re-entrant.

Of course, if your form, drawing, whatever, changes a lot, then the CPU would be
repainting it most of the time, unless you tell it not to, e.g. by calling the
Control.SuspendLayout() and ResumeLayout() methods which I strongly recommend when you
plan on massively populating/updating big controls such as a list view.

Hope this helps.

Smile | :)

Luc Pattyn

[My Articles]

textbox cairrage return

V.22-Feb-07 21:01

22-Feb-07 21:01

Guys,

I have a multiline textbox. When I send a hardcoded string line1\r\nline2 to it. All is OK. When I use that same string in my resources it shows the \r\n as characters instead.
Is there a way around this?

thanks !

V.
I found a living worth working for, but haven't found work worth living for.

Re: textbox cairrage return

Christian Graus22-Feb-07 23:57

Christian Graus

22-Feb-07 23:57

You should never use \r\n. Use Environment.NewLine instead.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.