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Sir,
I want to connect the database(Sql Server) to vc++.net programically.I also want to use insert delete update queries in the form .Please help me or please send any link for the problem.
Thanks.
www.codeproject.com/database[^]
the link contains only the connection strings
Please help.
Thanks
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amaneet wrote: the link contains only the connection strings
Wrong. Between the articles on that link, and the articles in MSDN, you really shouldn't have any trouble.
But you're still posting in the wrong forum.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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If I write this...
Managed c++..
template<typename T>
public ref class SomeTemplate
{
public:
SomeTemplate();
void Test(void)
{
}
};
public ref class ManagedCppClassToUseFromCSharp
{
public:
SomeTemplate<System::Int32> aMember;
};
Then in c# client
ManagedCppClassToUseFromCSharp test = new ManagedCppClassToUseFromCSharp();
test does not contain a member called aMember
However if I do this...
template<typename T>
public ref class SomeTemplate
{
public:
SomeTemplate();
void Test(void)
{
}
};
public ref SomeTemplateInt : public SomeTemplate<System::Int32>
{
public:
SomeTemplateInt();
}
public ref class ManagedCppClassToUseFromCSharp
{
public:
SomeTemplateInt aMember;
};
Now I can access aMember from c#. Anyone know why and if there is a way to get around having to declare different classes derived from my template?
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Josh, not having any direct experience myself but drawing only on memory of what I have read (whew)... since you are using C++ templates to define SomeTemplate rather than .NET generics any instance of it is a "native" type and cannot therefore be exposed through the CTS for C#.
SomeTemplate<System::Int32> aMember;
is a native member declaration NOT a managed type declaration.
led mike
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Hello,
The template does produce a managed type as it is declared as
template<typename t="">
public ref class
{
}
the ref keyword makes it a managed type. In the second example from my original post the class derived from the template is also a managed class and the member of that type can be accessed frmo the c# client. The template must produce a managed class as you cant derive a managed class from a non-managed one.
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Previous attempt to post this code screwed the code all up... let's try again.
namespace Library1 {
generic <typename T>
public ref class TWhat
{
T _what;
public:
property T What
{
void set(T value){ _what=value;}
T get(){ return _what;}
}
};
public ref class ManagedCppClassToUseFromCSharp
{
private:
TWhat<System::Int32>^ _twhat;
public:
ManagedCppClassToUseFromCSharp(){ _twhat = gcnew TWhat<System::Int32>(); }
TWhat<System::Int32>^ GetWhat(){return _twhat; }
};
}
and the C# code:
InitializeComponent();
Library1.ManagedCppClassToUseFromCSharp mcctuf = new ManagedCppClassToUseFromCSharp();
TWhat<System.Int32> tw = mcctuf.GetWhat();
tw.What = 11;
System.Diagnostics.Trace.WriteLine(String.Format("TWhat: {0}", tw.What));
led mike
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Thanks mate, Ill give it a shot
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Let me know how it goes ok?
"When your argument falls apart...resort to name-calling." Red Stateler aka (D)espeir in the Soapbox
Whereas "liberal" is just a moron. Red Stateler aka (D)espeir in the Soapbox
led mike
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Changing the template to be a generic causes all sorts of compilation errors.
I get lots of
C3229 indirections on a generic type parameter are not allowed
C3231 template type argument cannot use a generic type parameter
This is the first few lines of the template that produce a lot of these errors
template<typename rawtype,="" typename="" managedtype="">
public ref class BoostEventAdapter
{
public:
delegate void EventDelegate(ManagedType^);
BoostEventAdapter(boost::function<void (rawtype&)=""> &boostEvent): mBoostEvent(boostEvent) {}
};
Using the template by deriving empty classes from it as I described in the first post seems to be the best way for me to go
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How CreateDIBSection To Work For
Picture Screen On Desktop.
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CreateDIBSection works when you call the API. If you want the desktop in a DIBSEction, you need to capture it, and copy it on to a DIBSection. That's fine, the desktop will always be a DDB, anyhow.
You've also asked this in the managed C++ forum, CreateDIBSEction is not a C++/CLI API, so this belongs in the Visual C++ forum.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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now,I want to learn C++/CLI, somebody would introduce a e-book for me?
(I have lern C++ before)
Thanks
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Thanks ,and would you like to introduce a book about it to me?
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When Nishes book is published, it will be your best bet. I say wait for it, and use web based resources in the meantime.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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How To Get All of Desktop Pixel And Copy to one variable
!=Hight Speed
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You don't care if it's slow, is that what != High Speed means ?
Perhaps you should just search the articles, I know there's at least one on desktop capture. And in future, ask your C++ questions in the C++ forum, this is MANAGED C++.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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how i start managed C++
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I'd say you need to know C++ first, then you buy a book, such as the excellent one that Nish will be publishing soon.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Sir,
Can u please suggest me any link that teaches how to make a web application in vc++.net.
Thanks
-- modified at 12:21 Monday 25th September, 2006
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sir
i wanna pass an array to a fn by refrence.. The array should be allocated dynamically.. how can i it..
Can any one help me.. reply will be highly appreciated.
pls send me prototype of fn, calling fn etc. with simple eg
Thanx in advance..
shamnar
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You're wanting to pass a managed array ? I thought that array being a class, it would have been by reference by default. Or did you mean the C++ forum ?
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Do u know something about link list?
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Are you talking about a managed array? Managed arrays are a reference type so it would pass in a reference to that array.
static int Sqrt(int x) { if (x<0) throw new ArgumentOutOfRangeException(); int temp, y=0, b=0x8000, bshft=15, v=x; do { if (v>=(temp=(y<<1)+b<<bshft--)) {="" y+="b;" v-="temp;" }="" while="" ((b="">>=1)>0); return y;
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