WCF - compiler can't find TChannel

[Jeff Jarrell]

I want to provide a helper to apply a certificate to svcutil generated
class(s) that derives from ClientBase<TChannel>. But the compiler can't
find "TChannel". I have System.ServiceModel referenced, it finds ClientBase.

The stub looks like this... Any ideas appreciated. Thanks.

using System;
using System.Collections.Generic;
using System.Text;
using System.ServiceModel;

namespace whi.pw.core.webutil
{
public class CertificateResolver
{
public static void Apply(ClientBase<TChannel> proxy)
{
}
}
}

 

[Nicholas Paldino [.NET/C# MVP]]

Jeff,

This is an issue with not defining the type parameter TChannel. To fix
this, you would do:

public static void Apply<TChannel>(ClientBase<TChannel> proxy) where
TChannel : class

The constraint on TChannel comes from the constraint on the type
parameter TChannel in the ClientBase class.

 

[Jeff Jarrell]

Ok, that did the trick but I don't quite know what it means. Might you
point me to a reference on what the "where TChannel : class". Not so much as
TChannel, just what the "where" means on the method declaration.

thanks,
jeff

Jeff,

This is an issue with not defining the type parameter TChannel. To fix
this, you would do:

public static void Apply<TChannel>(ClientBase<TChannel> proxy) where
TChannel : class

The constraint on TChannel comes from the constraint on the type
parameter TChannel in the ClientBase class.


--
- Nicholas Paldino [.NET/C# MVP]
- (e-mail address removed)

I want to provide a helper to apply a certificate to svcutil generated
class(s) that derives from ClientBase<TChannel>. But the compiler can't
find "TChannel". I have System.ServiceModel referenced, it finds
ClientBase.

The stub looks like this... Any ideas appreciated. Thanks.

using System;
using System.Collections.Generic;
using System.Text;
using System.ServiceModel;

namespace whi.pw.core.webutil
{
public class CertificateResolver
{
public static void Apply(ClientBase<TChannel> proxy)
{
}
}
}

 

[Jeff Jarrell]

Nicholas,
Ok, No need to follow up. I found the reference. The where relates to a
contraint on the Generic interface.

Thanks.

Ok, that did the trick but I don't quite know what it means. Might you
point me to a reference on what the "where TChannel : class". Not so much
as TChannel, just what the "where" means on the method declaration.

thanks,
jeff

Jeff,

This is an issue with not defining the type parameter TChannel. To
fix this, you would do:

public static void Apply<TChannel>(ClientBase<TChannel> proxy) where
TChannel : class

The constraint on TChannel comes from the constraint on the type
parameter TChannel in the ClientBase class.


--
- Nicholas Paldino [.NET/C# MVP]
- (e-mail address removed)

I want to provide a helper to apply a certificate to svcutil generated
class(s) that derives from ClientBase<TChannel>. But the compiler can't
find "TChannel". I have System.ServiceModel referenced, it finds
ClientBase.

The stub looks like this... Any ideas appreciated. Thanks.

using System;
using System.Collections.Generic;
using System.Text;
using System.ServiceModel;

namespace whi.pw.core.webutil
{
public class CertificateResolver
{
public static void Apply(ClientBase<TChannel> proxy)
{
}
}
}