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POC# Generic Interface with different return types
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  1. POC# Generic Interface with different return types
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    copied!<p>I have webservice that can return data in multiple formats. For example json and xml. I'm building a simple C# api against this webservice and I would like the methods to be able to return either fully serialized objects from json, raw json or raw xml. For example:</p> <pre><code>List&lt;Order&gt; GetOrders(int customerId) string GetOrders(int customerId) XMLDocument GetOrders(customerId) Customer GetCustomer(int customerId) string GetCustomer(int customerId) XMLDocument GetCustomer(int customerId) </code></pre> <p>I have an idea about doing a fluent api where you would call a SetFormat() method which would then return a common Interface for the above methods. But I'm stuck on how that interface would look like, since the implementation that returns serialized objects returns objects of different types.</p> <p>Another simpler solution would to just have the methods that return serialized objects and then add an out paramater like this:</p> <pre><code>List&lt;Order&gt; GetOrders(int customerId, out string data) </code></pre> <p>but that's not very nice solution I think....</p> <p><strong>UPDATE</strong></p> <p>I prefered the none-generic solution that Sjoerd suggested, I had over-complicated my problem. This is what I ended up doing:</p> <pre><code>public class ServiceEntity { List&lt;Order&gt; GetOrders(int customerId).... } public class ServiceJson { string GetOrders(int customerId).... } public class ServiceXml { XmlDocument GetOrders(int customerId).... } </code></pre> <p>Then a fluent service class like this:</p> <pre><code>public class Service : IService { .... public AsJson() { return new ServiceJson(); } public AsEntity() { return new ServiceEntity(); } public AsXml() { return new ServiceXml(); } } </code></pre> <p>Used like this:</p> <pre><code>string json = Service.New().AsJson().GetCategories(1); List&lt;Order&gt; = Service.New().AsEntity().GetCategories(1); </code></pre> <p>Thanks for all the replies!</p>
 

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