deadlock reference in csharp

  • Thread starter Thread starter R.Balaji
  • Start date Start date
R

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
 
R.Balaji said:
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.
Click to expand...

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.
 
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.
 
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


Roman S. Golubin said:
R.Balaji said:
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.
Click to expand...

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.
Click to expand...
 
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

Stoitcho Goutsev (100) said:
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]

R.Balaji said:
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
Click to expand...
Click to expand...
 
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]
R.Balaji said:
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


Roman S. Golubin said:
"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
Click to expand...
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.
Click to expand...
Click to expand...
 
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.
Click to expand...

if your use vc++ then your must import this dynamic library with #import
How do I do it in C#.?
Click to expand...

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;
....
 
Hi R.Balaji,
I remember in VC++, we declare just class names and refer the classes.
Click to expand...

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#.?
Click to expand...

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