deadlock reference in csharp

[R.Balaji]

Hi,

I have declared two interfaces like this

//interface.cs

namespace test
{
interface IInterface1
{
IInterface2 getItem();
}

interface IInterface2
{
IInterface1 getItem();
}
}

I create a dll with this interface.
Now I create two project files.

One implements IInterface1 and the other implements IInterface2


//refer interface.dll
//class1.csproj
//class1.cs

using test;
public class class1 : IInterface1
{
IInterface2 getItem()
{
class2 a = new class2();
return a;
}
}

//refer interface.dll
//class2.csproj
//class2.cs

using test;
public class class2: IInterface2
{
IInterface1 getItem()
{
class1 b = new class1();
return b;
}
}



Now I couldn't compile class1, as it doesn't have reference of class2.
Also I couldn't compile class2, as it doesn't have reference of class1.
What should I do?

Thanks.

Regards,
R.Balaji

 

[Roman S. Golubin]

Hi,

I have declared two interfaces like this
[skip]

Now I couldn't compile class1, as it doesn't have reference of class2.
Also I couldn't compile class2, as it doesn't have reference of class1.

Your have MUST a reference to class to create it or your must load the
assembly that contains this class and use reflection for invoke constructor
of it.

 

[Stoitcho Goutsev \(100\) [C# MVP]]

Hi R.Balaji,
Why don't you reference class1 in class2 project and class2 in class1
project. Otherwise you can't compile the projects because the compiler
doesn't know anything about the other class.

 

[R.Balaji]

Hi,
Thanks for the answer.
But I couldn't compile class1.cs as well class2.cs
Then how would I add reference to the dll?

Regards,
R.Balaji

Hi,

I have declared two interfaces like this
[skip]

Now I couldn't compile class1, as it doesn't have reference of class2.
Also I couldn't compile class2, as it doesn't have reference of class1.

Your have MUST a reference to class to create it or your must load the
assembly that contains this class and use reflection for invoke constructor
of it.

 

[R.Balaji]

Hi,

Thanks for the answer.

I want to refer class2 in class1.
For that I need to compile class2.

But when I compile class2, it requires reference to class1.

I am going into a deadlock situation.

I remember in VC++, we declare just class names and refer the classes.

How do I do it in C#.?

Thanks.

Regards,
R.Balaji

Hi R.Balaji,
Why don't you reference class1 in class2 project and class2 in class1
project. Otherwise you can't compile the projects because the compiler
doesn't know anything about the other class.

--
B\rgds
100 [C# MVP]

Hi,

I have declared two interfaces like this

//interface.cs

namespace test
{
interface IInterface1
{
IInterface2 getItem();
}

interface IInterface2
{
IInterface1 getItem();
}
}

I create a dll with this interface.
Now I create two project files.

One implements IInterface1 and the other implements IInterface2


//refer interface.dll
//class1.csproj
//class1.cs

using test;
public class class1 : IInterface1
{
IInterface2 getItem()
{
class2 a = new class2();
return a;
}
}

//refer interface.dll
//class2.csproj
//class2.cs

using test;
public class class2: IInterface2
{
IInterface1 getItem()
{
class1 b = new class1();
return b;
}
}



Now I couldn't compile class1, as it doesn't have reference of class2.
Also I couldn't compile class2, as it doesn't have reference of class1.
What should I do?

Thanks.

Regards,
R.Balaji

 

[Stoitcho Goutsev \(100\) [C# MVP]]

Hi R.Balaji,

Yes, you are right. You have cyclic dependency. You should avoid that.
I haven't test it, bu try to put class1 and class2 in the same project
(assembly).

--
B\rgds
100 [C# MVP]

Hi,
Thanks for the answer.
But I couldn't compile class1.cs as well class2.cs
Then how would I add reference to the dll?

Regards,
R.Balaji

"R.Balaji" <[email protected]> ÓÏÏÂÝÉÌ/ÓÏÏÂÝÉÌÁ × ÎÏ×ÏÓÔÑÈ ÓÌÅÄÕÀÝÅÅ:

Hi,

I have declared two interfaces like this
[skip]

Now I couldn't compile class1, as it doesn't have reference of class2.
Also I couldn't compile class2, as it doesn't have reference of

class1.

Your have MUST a reference to class to create it or your must load the
assembly that contains this class and use reflection for invoke constructor
of it.

 

[Roman S. Golubin]

Hi, R.Balaji

I want to refer class2 in class1.
For that I need to compile class2.

But when I compile class2, it requires reference to class1.

I am going into a deadlock situation.

I remember in VC++, we declare just class names and refer the classes.

if your use vc++ then your must import this dynamic library with #import

How do I do it in C#.?

u must set refference to class1 )

or use reflection:

using System.Reflection;
....

Assembly a = Assembly.LoadFrom("library full path\\library full name");
Object o = a.CreateInstance("test.Class1");

return (IInterface1) o;
....

 

[Stoitcho Goutsev \(100\) [C# MVP]]

Hi R.Balaji,

I remember in VC++, we declare just class names and refer the classes.

Not exactly. You may have the same problem in C++. Forward declaration in
C++ works only if you use pointers or references to the class. Otherwise you
are stuck in the same problem.

How do I do it in C#.?

How I suggested in my previous post try to put both classes in the same
assembly.