Managed C++/CLI

Re: I have spy ware on this computer I tracked it......

13-Oct-15 8:03

Nothing whatsoever, but it is interesting to read OP's first and second comments.

Paul Conrad13-Oct-15 8:13

Paul Conrad

13-Oct-15 8:13

Yes, I saw the OP's comments Suspicious | :suss:

"I've seen more information on a frickin' sticky note!" - Dave Kreskowiak

Set a Byte Array to a SqlServer database on C++\Cli

betedesvosges24-Aug-15 3:40

betedesvosges

24-Aug-15 3:40

Hello,

I have a byte array that i want to set on a sqlserver database with ADO.NET.
I have an error message : Cannot convert 'signed char *' to 'System::Object ^'
What is wrong ?
Thanks in advance.

C++

// Connexion
SqlConnection ^connection = gcnew SqlConnection(connectString);
connection->Open();

// Requete
String ^ myRequete = "UPDATE COM_PKCS12 SET PKCS12 = @myPKCS12 WHERE ID = '" + System::Convert::ToString(id) + "'";

// Objet Command
SqlCommand ^command = gcnew SqlCommand( myRequete, connection);

//Datas
SByte * testByteArray = pkcs12Data->array;

// Parameters
command->Parameters->Add(gcnew SqlParameter("@myPKCS12", SqlDbType::VarBinary));
command->Parameters["@myPKCS12"]->Value = testByteArray;

// Execution
int affectedrows = command->ExecuteNonQuery();

// Fermeture connection
connection->Close();

Re: Set a Byte Array to a SqlServer database on C++\Cli

Richard Deeming24-Aug-15 5:08

Richard Deeming

24-Aug-15 5:08

Your code is vulnerable to SQL Injection[^].

NEVER use string concatenation to build a SQL query. ALWAYS use a parameterized query.

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

sending a opencv Mat to a shared library generated by matlab

Member 1156211423-Aug-15 9:35

Member 11562114

23-Aug-15 9:35

Hello everybody!
at first I apologize for my weak English!
I use a shared library generated by MATLAB 2012b in VC++ 2012.
In my shared libray I have a function that takes two arguments and calculates normxcorr2 between them and return maximum calculated value:

function max = Normed_CC(template, image)
....

Now I want to send two variables of type cv::Mat from my vc++ program to it.
My problem is when I convert cv::Mat to mxArray and then send these new objects to "Normed_CC", normxcorr2 in Matlab side arise an exception with this theme:
"template at least must have two item".
sorry I don't remember exactly now because I'm not in work now and don't have access to my code...!
please help me to resolve my issue.
thanks in advance.

can anyone help me it this

Alaa Radwan21-Aug-15 18:18

Alaa Radwan

21-Aug-15 18:18

i'm a beginner and want to learn but i have problem !!
"error c2679 binary '<< ' no operator found which takes a right-hand operand of type "
when i used "cin"
my code is a simple as i said i'm beginner
it's :
#include <string>
#include <iostream>
using namespace std ;
int main ()
{
int age,weight ;
float bmi , height ;
string name , z ;
//for name
cout<<"Enter your name "<<endl ;
="" cin="">>name>>endl ;
//for age
cout<<"Enter your age "<<endl ;
="" cin="">>age>>endl ;
//for weight
cout<<"Enter Your Weight "<<endl ;
="" cin="">>weight>>endl ;
// for height
cout<<"Enter your Height In Meters"<<endl ;
="" cin="">>height>>endl ;
bmi=weight/(height*height) ;
if (bmi<18.5)
z= "You Are Underweight" ;
else if ((bmi>18.5) && (bmi<24.9))
z= "You Are Normalweight" ;
else if ((bmi>24.9) && (bmi<29.9))
z= "You Are Overweight" ;
else z= "obesity " ;
cout<<"Your BMI "<<"is "<

Re: can anyone help me it this

Richard MacCutchan21-Aug-15 22:05

Updating my projects to retarget to .NET 4.6

21-Aug-15 22:05

Part of your error message is missing, and you forgot to show which line produces the error.

John Schroedl18-Aug-15 2:24

John Schroedl

18-Aug-15 2:24

Hi guys,

So VS 2015 has arrived and I'd like to retarget my /clr projects to build against .NET 4.6. The project Properties page shows ".NET Target Framework Version" => "v4.5.2". But this field is non-editable (Configuration Properties > General, Project Defaults, .NET Target Framework)

I updated the SDK targeting quite easily to target the Windows 10 SDK by selecting "10.0.10240.0" in the Target Platform Version combo. Why no similar combobox for .NET targeting? grr.

I feel like I'm missing something simple but MS has never really made it simple for us C++/CLI devs.

I think must resort to hand-editing the .vcxproj files directly? Surely not.

The Add Reference dialog isn't much help either but it does confirm that I'm targeting 4.5.2.

Have you upgraded your projects yet? Is there an easy way to switch them to targeting 4.6?

John

PS. The 'help' is worthless in the properties dialog. It takes me to a "Cannot find requested topic..." page. Help Viewer content and linking has really gotten worse in 2015 in my experience so far.

Re: Updating my projects to retarget to .NET 4.6

John Schroedl20-Aug-15 7:29

John Schroedl

20-Aug-15 7:29

Answering my own question for future visitors.

You must hand-edit the vcxproj but it's a pretty simple change.

Old:

XML

<TargetFrameworkVersion>v4.5</TargetFrameworkVersion>

New:

XML

<TargetFrameworkVersion>v4.6</TargetFrameworkVersion>

John

using 'mkdir' for creating new directory

Member 93502373-Aug-15 5:24

3-Aug-15 5:24

Hi Guys!,

I'm developing program which receives name from user and create a new directory, then I've to a file with different name to that directory..

Idea is something like this:

Name of directory to be created :
Name of file : this file need to be saved to the created directory

I came across the use of 'mkdir', but i dont know how to use it properly

Can someone help me on this?

Thank you

Richard MacCutchan3-Aug-15 5:50

3-Aug-15 5:50

Check the documentation[^]. See also https://msdn.microsoft.com/en-us/library/windows/desktop/aa363872(v=vs.85).aspx[^].

Member 93502374-Aug-15 4:26

4-Aug-15 4:26

That helps!. Thank you so much Smile | :)

Richard MacCutchan4-Aug-15 5:51

4-Aug-15 5:51

No problem. But please try and use the correct forum in future.

PIEBALDconsult3-Aug-15 6:16

PIEBALDconsult

3-Aug-15 6:16

You can call MKDIR from your code, but it would render your code non-portable.

http://www.tutorialspoint.com/c_standard_library/c_function_system.htm[^]

Wes Aday3-Aug-15 9:26

Wes Aday

3-Aug-15 9:26

What does "mkdir" have to do with C++ managed or otherwise?

You can lead a developer to CodeProject, but you can't make them think.
The Theory of Gravity was invented for the sole purpose of distracting you from investigating the scientific fact that the Earth sucks.

adding pointer arrays

Member 935023729-Jul-15 22:09

29-Jul-15 22:09

Hi Guys,

I have to make a single bool array combining four integer arrays as follows. I'm not supposed to do as

C++

connected = new bool [bl1 + bl2 + tr + ct];

because bl1, bl2,tr,ct are pointer to arrays. Can some one give a solution for this??

Here is my code:

C++

class Protocol{

    int baseline1[10],baseline2[10];
    int catcht[20];
    int training[120];

    bool *connected;

public: 
    Protocol(int[10],int[10],int[120],int[20]);  
};

C++

<h1>include "protocol.h"</h1>

<h1>include "math.h"</h1>

Protocol::Protocol(int bl1[10], int bl2[10], int tr[120], int ct[20]){

    int *baseline1 = bl1;
    int *baseline2 = bl2; 
    int *training  = tr;
    int *catcht    = ct;

    connected = new bool [bl1 + bl2 + tr + ct];

}

Thank you!

Richard Andrew x6430-Jul-15 9:29

Richard Andrew x64

30-Jul-15 9:29

You haven't explained what it means to "make a single bool array combining four integer arrays." Therefore, no one can help you yet.

The difficult we do right away...
...the impossible takes slightly longer.

Richard MacCutchan30-Jul-15 21:26

30-Jul-15 21:26

Member 9350237 wrote:

C++
connected = new bool [bl1 + bl2 + tr + ct];
because bl1, bl2,tr,ct are pointer to arrays.

That makes no sense, the value in brackets has to be the requested length of the array. So the new array needs to be long enough to contain the combined number of elements of the other arrays.

You also need to explain how you will convert from int to bool when you copy the elements of the arrays.

Member 935023730-Jul-15 21:51

30-Jul-15 21:51

Thanks for responding!.

Sorry about my poor explanation..

I think I conveyed it a wrong way. I'm still in a confusion!

Let me try to explain the scenario..

Ultimately I need to make a bool array of length 10+120+20=150.This will be combinations of zeros and ones..

Out of which first 10 and last 20 positions are filled with '0'.

120 positions are divided into 10 sets of 12 members..
out of 12 positions 10 are ones and two zeros have to be randomly placed into this 12 locations..

for exp: Following are 1st and last set of 12 positions..
{1,1,1,1,0,1,1,1,1,0,1,1,.....1,1,0,1,1,1,0,1,1,1,1,1}

I'm bit stuck implementing this bool array...

As I mentined before

C++

int baseline1[10], int baseline2[20]

are 1st 10 and last 20 positions of the bool array which is basically '0', {0}..

C++

int training[120]

is to be assigend with zeros and ones in such a way that..

C++

int catcht[20]

array of zeros to be combined with array [120] as I mentioned before..

Sorry if my explanation is vague!

Richard MacCutchan30-Jul-15 22:16

30-Jul-15 22:16

OK, so you know the length of the array, so you just allocate it as normal:

C++

int arraySize = 10+120+20;
bool* boolArray = new bool[arraySize];
memset(boolArray, 0, sizeof(bool) * arraySize);

gives you an array with all elements set to zero. You now just need to add the code to set the various other items as required.

C++

bool* pBool = boolArray + 10; // skip first 10 elements
for (int i = 0; i < 10; ++i) // loop round each set of 12 elements, i.e. 10 times
{
    // use the pBool pointer to set random values into the 12 elements
    // ...
    pBool += 12; // point to the next set, and repeat
}

Member 935023730-Jul-15 23:16

30-Jul-15 23:16

Thanks a lot!!,

I'm wondering how to set random zeros and ones to pBool pointer!

you mean

C++

pBool = rand()%2;

Still bit confused!

As I mentioned , for each set I have 12 numbers, out of which 10 numbers 'must' be 1 and 2 0s have to be put randomly into this block of ones, so total of 12: One set should be like this
{1,1,1,1,0,1,1,0,1,1,1,1,...} and in the 2nd set there must be 10 ones and 2 zeros , but position of zero will be different.

will be great if you can help me out on this!

Richard MacCutchan30-Jul-15 23:42

30-Jul-15 23:42

I would do something like:

C++

bool* pBool = boolArray + 10;     // skip first 10 elements
srand( (unsigned)time( NULL ) );  // set a random seed for the generator
for (int i = 0; i < 10; ++i)      // loop round each set of 12 elements, i.e. 10 times
{
    memset(pBool, 1, sizeof(bool) * 12); // set all 12 elements to 1s
    int rIndex = rand() % 12;            // get index in range [0 .. 11]
    pBool[rIndex] = 0;                   // set this one to zero
    do
    {
        int rIndex2 = rand() % 12; // get index in range [0 .. 11]
        pBool[rIndex2] = 0;        // set this one to zero
    } while (rIndex2 == rIndex);   // make sure they are different elements

    pBool += 12;                   // point to the next set, and repeat
}

I have not tested this so you need to try it a few times to make sure it produces the desired results.

Member 935023731-Jul-15 0:34

31-Jul-15 0:34

Thanks a lot!!

Now it's working fine Smile | :)

Many thanks again!!

Richard MacCutchan31-Jul-15 0:36