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Dear Sir,
I use Visual c++ Net with Sql server 2000.
I need to make a connection string so that i can use it every where I need to open database.
how can I at the starting of my program to initialise a String variable and to use it every where ; at any forms?
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Dear Sir,
I use Visual c++ Net with Sql server 2000.
I need to make a connection string so that i can use it every where I need to open database.
how can I at the starting of my program to initialise a String variable and to use it every where ; at any forms?
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Store connection string in config file and read it in a string when your program starts
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This connection string is in a text file, I read it when I need to connect to a data base.
Now I ask if it is not a means to read one time at the starting programme and use it every where without read many times. Another precision I need, the starting of program is in what file and what procedure or part.
I learn my self
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Hey all...
I'm trying to call an exe i.e (PING) with argument ("www.yahoo.com")
and want output in my textBox instead of console...
I manage to redirect output to my textBox and also manage to hide the console window but in synchronous way... i.e the output comes after ping get fully executed... I need the output in asynchronous way..The way it shows in console window(Line by Line)..
I know i've to use BeginOutputreadLine() but couldn't manage to write exact code..Can anyone help mr out..
Following is my code ..
Process^ a = gcnew Process;
ProcessStartInfo^ b = gcnew ProcessStartInfo;
b->FileName = "ping.exe";
b->Arguments = "www.yahoo.com";
b->UseShellExecute = false;
b->RedirectStandardOutput = true;
b->CreateNoWindow = true;
a->StartInfo = myProcessStartInfo;
a->Start();
StreamReader^ myStreamReader = a->StandardOutput;
textBox1->Text = myStreamReader->ReadToEnd();
a->Close();
Ash..
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Ashish Chauhan wrote: I know i've to use BeginOutputreadLine() but couldn't manage to write exact code..Can anyone help mr out..
The documentation for BeginOutputReadLine() contains example code. Perhaps you could explain specifically what you are having a problem with?
led mike
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Thnks for ur reply...
But i believe i need to add event handler for tht..I mean for BeginOutputReadLine()... but whenever i try to write code for DataRecievedHandler i.e whenever i try to define object of DataRecievedHandler it denies it..It doesn't recognize as any of predefined
thing..
Am i forgetting to include any of files???
Ash..
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Ashish Chauhan wrote: whenever i try to define object of DataRecievedHandler it denies it..It doesn't recognize as any of predefined
thing..
If you are receiving error messages you should probably post them. Many times the contents of error messages can be meaningful.
led mike
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Member 4542272 wrote: i am confusing until cant move a single step.
There is an excellent set of C++/CLI Beginner Articles here on CodeProject. Stop typing code and READ the articles.
led mike
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I am trying to open an .lib file using the ildasm from visual studio tool menu.
When I open the gui for ildasm, there is no option for .lib file. The type of files it can open is
(*.exe, *.dll, *.mod, *.dll), there is no .lib files in the list. when I select all file types, it shows the .lib file but can not open it.
Is there any body know more about it.
I made a library file using Pure clr option. The files in that project all are native c/c++;
There is no error when I build the file but it give me linking error when I tried to use this library in another project it gives me some unresolve token.
Any help will be highly appreciated.
Thank you.
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s196675m wrote: I made a library file using Pure clr option. The files in that project all are native c/c++;
Pure assemblies (compiled with /clr:pure) can contain both native and managed data types, but only managed functions.
link[^]
So how did you get it to compile with all that native code in there?
led mike
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Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
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I don't know, never done a pure assembly. Would that compile?
led mike
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It’s amazing how many so called developers either don’t or can’t read documentation. I mean the state of documentation today compared to when I started out is incredible. I have a UDP thread in the C# forum where the OP was describing odd behavior and posted the sending code. I looked at it and said I had no experience with UDP but his code didn’t use SendTo and I would have expected it to just based on what I have read down through the years. So he replies with you can use Connect and Send with UDP and the thread goes back and forth a couple times until I have had enough.
So I go and build two apps, Sender/Client and code them the way I interpret the documentation and of course they just work, shocking, no really it is. Once I decided to do it the whole thing took like 20 minutes including getting snacks and drinks and chatting with folks. Meanwhile the C# thread spans 10s of hours. So I finally just reply with, I said a have had no experience so I just did it and it behaves as expected, here’s the code. 
led mike
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Hello
how to Convert Message% From Manage C++ To MSG *
i want to get message in manage C++ but with MSG don't with Message
[SecurityPermission(SecurityAction::Demand, Flags=SecurityPermissionFlag::UnmanagedCode)]
virtual void WndProc(Message% m ) override
{
////////////////////// I want To Send MSG * to Proc No Message%
Form::WndProc((Message%)m);
} //this is work but dont MSG *
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I was trying to link external library with my existing project. I got some error, where some of them are redefination and some of then are ambiguous symbol
error C2371: 'IDataObject' : redefinition; different basic type
The above error says, 'IDataObject' defines in more than one places. It might be true.
When I search MSDN I found IDataObject is declared in objidl.h and at the same time it is defined in System::Windows::Forms namespace.
I am using the VC++/ CLR project and I have windows form in my project.
The external library might be refering IDataObject from objidl.h. So compiler might find IDataObject in objidl.h and in System::Windows:Forms.
So, how I can avoid this definition problem.
Any idea, suggession or link will be helpful and appreciated.
Thank you.
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Hi friends,
Is there any function available in c++/VC++ to convert an hex value to int? let me know if yes.
Regards,
lgatcodeproject
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lgatcodeproject wrote: Is there any function available in c++/VC++ to convert an hex value to int? let me know if yes.
Perhaps you are looking for the C Runtime Library strtol(...) function. If you are this is the wrong forum as this forum is for C++ development using the .NET platform. For future C/C++ questions use the Visual C++ / MFC forum
led mike
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okay! 
lgatcodeproject
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I'm using System.Net.NetworkInformation.NetworkInterface to get the information about network connections to my PC. But this class seems to be 'Read only', i.e., I can view the information about network connection. For example System.Net.NetworkInformation.NetworkInterface.OperationalStatus tells us whether network connection is Up or Down. Is there any away that I can change that status programatically? i.e, can we enable/disable the network connection programatically?
Thanks
Ram
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Hi,
I've the following code that runs in a timer function every second. OnTimedEvent() is a timer delegate that is invoked by Windows timer every second. It uses MFC/Windows SDK. It sets the processor priority for the thread that is running this code.
void CPci1553::OnTimedEvent( Object^ source, ElapsedEventArgs^ e )
{
//set the timer thread affinity to second process and set it to higher priority
SYSTEM_INFO info;
//get the configuration information of computer
GetSystemInfo(&info);
//if the system has more than one processor, use the last processor for TOD thread
//set the thread affinity to second processor
if(info.dwNumberOfProcessors > 1)
SetThreadIdealProcessor(GetCurrentThread(),info.dwNumberOfProcessors-1);
}
I need to upgrage this code for .NET using C++/CLI. I tried to use .NET functions like "System::Environment::ProcessorCount" to processor count in on the system, "System.Diagnostics.ProcessThread.IdealProcessor" to set the processory priority for the thread, "System.Threading.Thread.CurrentThread" to get the current running thread for this code. But the problem is "System.Diagnostics.ProcessThread" is unmanaged thread and "System.Threading.Thread" is managed thread. I don't know how to mix these two. Pls. help me with this code.
Thanks
Ram
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There isn't a one-to-one relationship between System.Threading.Threads
and System.Diagnostics.ProcessThreads.
A System.Diagnostics.ProcessThread is an actual OS thread.
A System.Threading.Thread is a logical thread. It's possible for many
System.Threading.Threads to be using the same OS thread.
You can manage affinity at either level, but doing it at the
System.Threading.Thread level doesn't mean it will have any effect whatsoever
on an OS thread, like your Win32 API code does.
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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OK. If I want to go with OS thread using System.Diagnostics.ProcessThread class, I can use System::Diagnostics::ProcessThread::IdealProcessor to set the processory affinity. But, how do I access the current running thread like we get with GetCurrentThread()in WIN32?
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