Question

I have following working code (for consuming a WCF service).

SecurityRoleWebService is a namespace.

SecurityWebserviceManagerImplClient is a class corresponding to a WCF service.

getSecurityRoles() is a method corresponding to service operation.

When I add the namespace as

using SecurityRoleWebService 

I am getting the following error:

Error: The type or namespace name ‘SecurityRoleWebService’ could not be found (are you missing a using directive or an assembly reference?)

Why is it so? How to overcome this?

SecurityRoleWebService.SecurityWebserviceManagerImplClient proxySecurityRole = new SecurityRoleWebService.SecurityWebserviceManagerImplClient();

        SecurityRoleWebService.SecurityRole[] roles = proxySecurityRole.getSecurityRoles(userID);

        string roleName = roles[0].roleName;

Answer 1

Use the full qualified namespace of the class. When you a using a ServiceReference, the generated namespace is [default namespace of your project].[name of the service reference]. You have to use this full qualified namespace in a using.

When you prefix a class like you did with new SecurityRoleWebService.SecurityWebserviceManagerImplClient(); you can use a relative namespace (relative to the namespace the codeblock is in).

When you write a using, this you are not in a codeblock that has a namespace, so there is no namespace to relate to. You have to use the full qualified namespace.