Managed C++/CLI Discussion Boards

Re: Hiding a serializable property

ian mariano9-Mar-04 9:16

ian mariano

9-Mar-04 9:16

[Browsable(false)]

Ian Mariano - http://www.ian-space.com/

"We are all wave equations in the information matrix of the universe" - me

Re: Hiding a serializable property

Hamzeh9-Mar-04 19:31

Hamzeh

9-Mar-04 19:31

Thank you but the attribute [Browsable(false)] hides the property from the property page only but what i want is to hide the property from being listed in the list of properties and methods in the "code behind" when writing code like this "Control1." then a list of properties and methods will appear and here is the place where i want to hide my property.

thank you...

Re: Hiding a serializable property

ian mariano10-Mar-04 5:37

ian mariano

10-Mar-04 5:37

Then you want:

[EditorBrowsable(EditorBrowsableState.Never)]

Ian Mariano - http://www.ian-space.com/

"We are all wave equations in the information matrix of the universe" - me

Re: Hiding a serializable property

Hamzeh10-Mar-04 21:55

Hamzeh

10-Mar-04 21:55

Thx for your quick response, I appreciate it, the attribute sounds pretty and straight forward, but I don’t know why it’s not working with me, am trying to investigate it further……

Reading text file to 2D arrays

kfresh8-Mar-04 8:56

kfresh

8-Mar-04 8:56

i need some help in getting data from a txt file to an array. i'm using C++ in visual studio .net. and yes i'm a newbie and this is a homework assignment so please be easy on me hahaha...

here's the txt file contents:
75 83 77 91 76
80 90 95 93 48
78 81 11 90 73
92 83 30 69 87
23 45 96 38 59
60 85 45 39 67
27 31 52 74 83
93 94 89 77 97
79 85 28 93 82
85 72 49 75 63

i need to use the numbers in the file for calculations. here's part of my code using StreamReader to get the data from the txt file.

Code:

<br />
int main() <br />
{ <br />
   double average = 0.0; <br />
   int rows = 0; <br />
   int cols = 0; <br />
    <br />
   //declare streamreader <br />
   IO::StreamReader *inData; <br />
   inData = IO::File::OpenText("InData.txt"); <br />
<br />
   //reading records <br />
   while (inData->Peek()) <br />
   { <br />
   } <br />
   inData->Close(); <br />

this is where i get tripped up.. i'm unsure what i need to add to get that data into an array to do calculations. I know i still need to declare the array. i just need to know what do to in the while loop to get the data from the txt file into an array to do calculations. so i guess the data from the files also need to be converted to integers i guess right?

K

Re: Reading text file to 2D arrays

Antti Keskinen16-Mar-04 23:49

Antti Keskinen

16-Mar-04 23:49

Consider the following aspects:

1. The file itself consists of characters, written sequentically. A line change is represented by a delimeter character, usually '\n'.
2. The above having said, all numbers in your text file are represented by characters.

For the CRT, there are routines that can convert a character string into a numeric variable, such as to an integer or to a float. Now, you should first piece up the reading into smaller parts. For example, instead of reading the entire file, try reading a single row (read until character equals '\n').

After this, parse the line you just read, considering that the line begins with a number, and all numbers are seperated by a white space. So, from start of the line, copy characters into a temporary buffer until you face a white space character (' '). Then run this temporary buffer through a char-to-number conversion routine, and save the converted integer into the array. Jump over the white space, and repeat.

This being a homework assignment, I won't give you a direct code example, but will guide you to the correct routines. For the numeric conversions, see _atoi in the MSDN. For the text file reading, how about copying the entire file into a HUGE buffer first, then parsing through the buffer line-by-line, and ultimately, each line by a number-by-number basis ?

You can run through a character string by using index numbers, for example, if char buffer[2000] then buffer[nIndex] would be a single character in the buffer.

Enjoy Smile | :)

-Antti Keskinen

----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.

Re: Reading text file to 2D arrays

ravjak25-Mar-04 6:26

ravjak

25-Mar-04 6:26

Another way. Old C style Smile | :)

<br />
char buff[BUFF_SIZE];<br />
int read=0;<br />
FILE *pFile = fopen("data.txt","r");<br />
if(!pFile)<br />
 return 0;<br />
<br />
memset(buff,0,BUFF_SIZE-1);<br />
read=fread(buff,sizeof(char),BUFF_SIZE,pFile); //reading whole file content<br />
<br />
char *tmp_p=buff;<br />
char *tmp_n=buff;<br />
int a;<br />
while(tmp_n - buff<read-1) //we don't want segfaults<br />
{<br />
if(tmp_n[0]==' ' || tmp_n[0]=='\n')//read something about atoi <br />
	{	<br />
	a = atoi(tmp_p);<br />
	tmp_p=tmp_n+1;<br />
	printf("%d ",a);<br />
	if(tmp_n[0]=='\n')	//here you can detect that we will habve a new vector of data	<br />
	printf("\n");<br />
	}<br />
		<br />
	tmp_n++;<br />
}<br />

I used an int a as representation of decimal valuse probably you will use your 2D array here.

I've made an assumption that we can not have consecutive separators. If in your file for a new line \r\n is used, then some simple modifications are needed.

Pain is a weakness living the body

Sharing form controls between two forms

Devaraju .R8-Mar-04 3:23

Devaraju .R

8-Mar-04 3:23

Please help me to overcome from this issue.

I have to access the controls of Form1 in Form2, similarly i have to refer the controls and properties of form2 in In form1

How to achieve this.

In C# it is like this.
Code in form2
//just declare the form1 as a field in form2
Form1 frm1;

code in Form1;
//Create an instance of form2
Form2 frm2 = new Form2();
//add assign the current form
Form2.frm1 = this;

How to do this in managed C++.Net (VS.Net 2003)

Thanks a lot in Advance

Yours
Deva

devraj

Re: Sharing form controls between two forms

ian mariano10-Mar-04 5:45

ian mariano

10-Mar-04 5:45

You do it the same way...just using Managed C++ conventions:

//   our namespace is "test"
//   code in Form2.h
public __gc class  Form1;   //   forward declaration
 
//   inside Form2 class
private:
   Form1*   m_pForm1 = null;
 
public:
   __property Form1* get_Form1()   {   return m_pForm1;   }
   __property set_Form1(test::Form1* pForm)   {   m_pForm1 = pForm;   }
 
//   code in Form1.h
#include   "Form2.h"
 
//   inside Form1 method
Form2*   pForm2 = new Form2();

pForm2->Form1 = this;

Ian Mariano - http://www.ian-space.com/

"We are all wave equations in the information matrix of the universe" - me

Re: Sharing form controls between two forms

Anonymous12-Mar-04 14:01

Anonymous

12-Mar-04 14:01

In C++.Net initially it is not allowing the declaration of form1 in form2. Then how can i?

I have included the Form1.h in form2.h file. It gives the error : Storage class unspecified.

Re: Sharing form controls between two forms

ian mariano15-Mar-04 12:10

ian mariano

15-Mar-04 12:10

I've had no problem with it. Check the code carefully. Apply the __gc keyword where necessary as above.

Ian Mariano - http://www.ian-space.com/

"We are all wave equations in the information matrix of the universe" - me

how do i??

Anonymous8-Mar-04 3:14

Anonymous

8-Mar-04 3:14

I need to know how to run a script from another script in c++?

Re: how do i??

ian mariano9-Mar-04 9:22

ian mariano

9-Mar-04 9:22

See Microsoft Windows Script Interfaces-Introduction.

Ian Mariano - http://www.ian-space.com/

"We are all wave equations in the information matrix of the universe" - me

look ahead function in tic-tac-toe

kclei4-Mar-04 21:58

kclei

4-Mar-04 21:58

is that possible to use look ahaed fucntion in programming a tic-tac-toe c-program? what we need to initialize??beside, how to built a fuction to check which path is the best to move?

Re: look ahead function in tic-tac-toe

Shog⁹5-Mar-04 11:35

Shog⁹

5-Mar-04 11:35

kclei wrote:
is that possible to use look ahaed fucntion in programming a tic-tac-toe c-program?

Yes.

kclei wrote:
how to built a fuction to check which path is the best to move?

Consider the factors which make one potential action better/worse than others. Rank all potential actions based on these factors. Choose the highest-ranked action. Repeat.

That's one way, at least...

How do you move in a world of fog, That's always changing things? Makes me wish that i could be a dog, When i see the price that you pay.

Re: look ahead function in tic-tac-toe

Nick Parker6-Mar-04 8:34

Nick Parker

6-Mar-04 8:34

Shog9 wrote:
Consider the factors which make one potential action better/worse than others. Rank all potential actions based on these factors. Choose the highest-ranked action. Repeat.

Wow, don't just give it away! Poke tongue | ;-P

- Nick Parker
My Blog

Re: look ahead function in tic-tac-toe

kclei11-Mar-04 3:53

kclei

11-Mar-04 3:53

thanks for ur advice, i wil try my best on it..

Instantiating unmanaged class from managed code

xcvbxcvbxcv4-Mar-04 4:48

xcvbxcvbxcv

4-Mar-04 4:48

I am wrapping an managed class around and unmanaged dll. I am then building the managed class as a dll and using it in c#.
The comes when I try to instantiate the unmanaged classes from the managed constructor; I get a stackoverflowexception and do not know why. Also, when I run my managed class dll as a console app and test it, it works fine. Any help. The code is listed below.

#include "unmanaged_dll.h"
#using <mscorlib.dll>
#include <vcclr.h>

_nogc UnmanagedDll class
{
public:

// 'unmanaged_dll' is the name of the class in the unmanaged dll
unmanagedd_dll d;
};

namespace ManagedDll
{
public:

extern "C" public __ gc class ManagedWrapper
{
ManagedWrapper()
{d = new UnManagedDll();:
}

private:
UnmanagedDll *u;

};

Re: Instantiating unmanaged class from managed code

ian mariano4-Mar-04 11:04

ian mariano

4-Mar-04 11:04

Check out Interoperating with Unmanaged Code.

If you're trying to access a class in the DLL, you'll need to expose it as a COM object and follow the steps in Exposing COM Components to the .NET Framework, otherwise, you can export the functions you need from the DLL, and use the steps in Consuming Unmanaged DLL Functions.

Ian Mariano - http://www.ian-space.com/

"We are all wave equations in the information matrix of the universe" - me

Re: Instantiating unmanaged class from managed code

xcvbxcvbxcv10-Mar-04 5:35

xcvbxcvbxcv

10-Mar-04 5:35

Thanking. I found out what my problem was and that part of the code works fine. If you look at my latest post above. It will provide you with the answer.

Thanks

C++Builder5 TListBox to char

kjetilh4-Mar-04 2:22

kjetilh

4-Mar-04 2:22

Hi...

I am using two TListBoxes ang need to get the informasjon out of the ListBox and into char.
If someone can help me I be very Big Grin | :-D

.
Thanks

Helmet

regsvr32 utility

adarsh_sebiz3-Mar-04 18:55

adarsh_sebiz

3-Mar-04 18:55

Hi.

I have built a Win32 DLL (MyProject.dll), and i am trying to register this DLL using regsvr32 utility, but this is giving me following error:

"MyProject.dll was loaded, but the DLLRegisterServer entry point was not found"

I am working in VC++ .NET and my OS is Win2000 Professional.

Can somebody provide me the solution for registering the Win32 DLL?

Thanks in advance.

Regards,
ADARSH

Re: regsvr32 utility

Dudi Avramov4-Mar-04 1:59

Dudi Avramov

4-Mar-04 1:59

Well, i;m not familiar with .NET but in CV++ 6 you should define:

<br />
STDAPI DllRegisterServer(void)<br />
{<br />
   // Add you code here<br />
}<br />
<br />
STDAPI DllUnregisterServer(void)<br />
{<br />
   // Add you code here<br />
}<br />

and in the project def file add the following 2 lines:

<br />
EXPORTS<br />
      DllRegisterServer		@1 PRIVATE<br />
      DllUnregisterServer	@2 PRIVATE<br />

Re: regsvr32 utility

Steve S11-Mar-04 1:56

Steve S

11-Mar-04 1:56

Why do you need to register it?
Is it a COM DLL, or a regular DLL?

Steve S

Re: regsvr32 utility

Anonymous11-Mar-04 17:11

Anonymous

11-Mar-04 17:11

Hi Steve,

Thanks for replying..

It is a regular DLL..

Thanx.

Regards,
ADARSH

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