public class BusinessObjectG eneric<EntityTy pe: BusinessObject
where EntityType : BusinessEntity, new() {
public BusinessObjectG eneric<EntityTy pe() {
}
.....
causes error in constructor declaration:
Error 1 Invalid token '(' in class, struct, or interface member declaration
How to create generic class constructor ?
Andrus.
7  38615 
Andrus,
You can't create a generic class constructor. If you want to take
advantage of parameterized types in the constructor, then you will have to
take the type in the class declaration level.
Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Andrus" <ko********@hot .eewrote in message
news:uw******** ******@TK2MSFTN GP02.phx.gbl...
public class BusinessObjectG eneric<EntityTy pe: BusinessObject
where EntityType : BusinessEntity, new() {
public BusinessObjectG eneric<EntityTy pe() {
}
....
causes error in constructor declaration:
Error 1 Invalid token '(' in class, struct, or interface member
declaration
How to create generic class constructor ?
Andrus.
Why this limitation exists ?
I want to assing values to some properties in constructor.
Any idea how this can be done ?
Andrus.
"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c omwrote in
message news:um******** ******@TK2MSFTN GP02.phx.gbl...
Andrus,
You can't create a generic class constructor. If you want to take
advantage of parameterized types in the constructor, then you will have to
take the type in the class declaration level.
Andrus,
What kind of properties are you trying to assign to in the constructor?
What would you like to be able to do if the compiler let you?
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Andrus" <ko********@hot .eewrote in message
news:uX******** ******@TK2MSFTN GP06.phx.gbl...
Why this limitation exists ?
I want to assing values to some properties in constructor.
Any idea how this can be done ?
Andrus.
"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c omwrote
in message news:um******** ******@TK2MSFTN GP02.phx.gbl...
>Andrus,
You can't create a generic class constructor. If you want to take
advantage of parameterized types in the constructor, then you will have
to take the type in the class declaration level.
I'd like to create new entity object in business object constructor:
public BusinessObjectG eneric<EntityTy pe(string param) {
Entity = new <EntityType() ;
if (Entity!=null)
Entity.propery = param;
}
Andrus.
"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c omwrote in
message news:%2******** *******@TK2MSFT NGP06.phx.gbl.. .
Andrus,
What kind of properties are you trying to assign to in the constructor?
What would you like to be able to do if the compiler let you?
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Andrus" <ko********@hot .eewrote in message
news:uX******** ******@TK2MSFTN GP06.phx.gbl...
>Why this limitation exists ?
I want to assing values to some properties in constructor.
Any idea how this can be done ?
Andrus.
"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c omwrote
in message news:um******** ******@TK2MSFTN GP02.phx.gbl...
>>Andrus,
You can't create a generic class constructor. If you want to take
advantage of parameterized types in the constructor, then you will have
to take the type in the class declaration level.
public BusinessObjectG eneric<EntityTy pe() {
}
Here, you're trying to parameterize a method by a type. As others have said,
that can't be done for a constructor. The class, on the other hand, can and
is parameterized by a type. That's all you need.
///ark
Andrus,
In this case, you would have to have EntityType be in the class itself,
and then do this:
public BusinessObjectG eneric<TEntityT ypewhere TEntityType : new()
{
public BusinessObjectG eneric(string param)
{
TEntityType entity = new TEntityType();
}
}
Now, the thing here is that the property you want to set has to come
from a base class/interface which you specify in the constraints, or you
have to access it through reflection.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Andrus" <ko********@hot .eewrote in message
news:%2******** ********@TK2MSF TNGP05.phx.gbl. ..
I'd like to create new entity object in business object constructor:
public BusinessObjectG eneric<EntityTy pe(string param) {
Entity = new <EntityType() ;
if (Entity!=null)
Entity.propery = param;
}
Andrus.
"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c omwrote
in message news:%2******** *******@TK2MSFT NGP06.phx.gbl.. .
>Andrus,
What kind of properties are you trying to assign to in the
constructor?
What would you like to be able to do if the compiler let you?
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Andrus" <ko********@hot .eewrote in message
news:uX******* *******@TK2MSFT NGP06.phx.gbl.. .
>>Why this limitation exists ?
I want to assing values to some properties in constructor.
Any idea how this can be done ?
Andrus.
"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c omwrote
in message news:um******** ******@TK2MSFTN GP02.phx.gbl...
Andrus,
You can't create a generic class constructor. If you want to take
advantage of parameterized types in the constructor, then you will have
to take the type in the class declaration level.
"Andrus" <ko********@hot .eeschrieb im Newsbeitrag
news:uw******** ******@TK2MSFTN GP02.phx.gbl...
public class BusinessObjectG eneric<EntityTy pe: BusinessObject
where EntityType : BusinessEntity, new() {
public BusinessObjectG eneric<EntityTy pe() {
}
<snip>
How to create generic class constructor ?
If by generic class constructor you mean a constructor of a generic class:
simply omit the type parameter list of the constructor:
public class BusinessObjectG eneric<EntityTy pe: BusinessObject
where EntityType : BusinessEntity, new() {
public BusinessObjectG eneric() {
}
The constructor by itself is not generic.
Yes, the error message could be clearer in this case.
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