Reference.cs files

Listing 3 shows these classes and interfaces. As you can see, we have to mark the inherited type with the KnownType attribute, wherein we specify the type of the object that inherits from it.

Listing 4 shows the contents of the two Reference. However, each of them has definitions of the following classes: Person, Employee and Customer. This makes sense because a service can be invoked without dependence on the other services.

Yet, this can get messy if there are a lot of data contracts that inherit from some base class. Aside from it is hard to determine which namespace to use, you cannot use a single base type for two service operations in different namespaces. In our example client application, we cannot use the same Person class as the return type of both GetCustomer and GetEmployee operations. Serialization ; using System ; public partial class Person : object , System.

ICustomerService, System. IEmployeeService, System. Customer and Employee Service References One way to resolve these issues is to reuse types in shared assemblies. This means we put all our data contracts in a separate assembly to be shared or referenced by both the server and client applications.

Note that this will only work when we have a. Create a class library project and put all the data contracts there. In our example, the classes Person, Employee and Customer will be put in this project. If you want, you can put the project in separate directory to differentiate shared assemblies from the client and server assemblies. Add a reference to the shared assembly in the client and server projects. Assuming that we have existing service references for the Customer and Employee services, right click each of them on the solution explorer and select Configure Service Reference This will show the following dialog.

Figure 4. Configure Service Reference We just need to make sure that the checkbox indicating whether to reuse types in referenced assemblies is checked.

You can also select to reuse types in all referenced assemblies or just the types from the specified reference assemblies. After clicking OK, update the service reference by right clicking on the service reference again and selecting Update Service Reference from the context menu. Here is the updated Reference. This deals with the issues we had earlier due to multiple definitions of data contract classes. Everything might work fine already.

However, you might encounter an error when adding service references if the relationships between the data contract classes contain circular references. This error occurs when I set the IsReference property of the DataContract attribute to true of my base class. Setting the IsReference property to true resolves the problem with circular references. The following figure shows the relationships of the Child class with the existing classes.

Figure 5. Circular References A circular reference happens when an object has a reference to an object that inherits from it, which in turn has a reference to the former. The DataContractSerializer class, used in serializing data contracts into XML, does not preserve circular reference by default.

Thus a runtime exception occurs when you try to invoke the WCF service that involves passing of objects with circular references. So in our example, we only need to set the IsReference property of the DataContract attribute annotating the Person class to remove the exception. So I did a quick search and certainly I saw a similar problem in this forum thread.

NET Framework 1. NET Throughout the years, Microsoft has released numerous versions of C with. Some notable releases:. You can also edit the files with various other source code editors that feature syntax highlighting, such as the cross-platform Microsoft Visual Studio Code. However, plain text editors are not good options for editing the files since they do not support the syntax structure.

If you are looking to compile CS files, Mono is a common choice and is open source and cross-platform. File created by ColorSchemer Studio, a program used for developing color palettes for websites, magazines, home decoration, and other target mediums; saves the user's color schemes, which often contain complementary colors that are matched with one another on the color spectrum.

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Viewed 4k times. Thank you. Improve this question. Add a comment. Active Oldest Votes. You need to reference it via the root of your application. Improve this answer. Hi bretterer, thanks for offering your advice. It seems that adding a slash before the link to the css file is not working. It doesn't reference it when i do so. Having said that your second method is working but in that case I would have to hardcode the path in every link. I was looking for a more scalable method so for now i defined the base url as suggested by MIIB.

It worked. Thank you for your help. If doing it this way, I would set it up not to be a variable but to be a constant that is defined absolutely first in your application.