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POhow to pass a service reference delegate into a generic method with error handling
 

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  1. POhow to pass a service reference delegate into a generic method with error handling
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    <p>I'm not sure how to best describe what I want so I'm going to start off high-level and then go over my thought on the implementation.</p> <p>Using c# I'm trying to make a method that has a generic return type, and takes as a parameter a method from a service reference.</p> <p>This generic method is going to new up the service reference, call the service reference's method that I passed in, do all the error handling and checking needed for a service reference, and then either Close or Abort it and return the result of the call.</p> <p>The sort of pseudo code of this:</p> <pre><code>public T CallServiceReference&lt;T&gt;(method serviceRefMethod) { T result = null; ServiceReference svcClient = new ServiceReference.Client(); try { result = svcClient.serviceRefMethod; svcClient.Close(); } catch (ExceptionType ex) { // log error message svcClient.Abort(); throw; } return result; } </code></pre> <p>Is this possible in c#? I'm looking in generics and delegates. One of my major issues is making a delegate of one the service reference's methods without the service ref being instantiated. If I have to instantiate the service ref I think I might as well put all of the Close, Abort and error handling for each method call.</p> <p>I'm researching different design patterns although it's a little difficult since I don't know the name of the one I'm looking for or if it even exists.</p> <p>Let me know if I can provide any additional information or clarification.</p> <p>Update (part 2): Now I'm trying to make a delegate that encapsulates variables with the method it is calling.</p> <pre><code>public delegate T Del&lt;T&gt;(); public static IEnumerable&lt;String&gt; GetDataFromService(String username) { ServiceReference.ServiceClient client = new ServiceReference.ServiceClient(); // the method I'm going to call returns a string array Del&lt;String[]&gt; safeClientCall = new Del&lt;String[]&gt;(client.DataCall); // the above call is what I need to use so the C# compiles, but I want to do this // the below code throws an error... Del&lt;String[]&gt; safeClientCall = new Del&lt;String[]&gt;(client.DataCall(username)); var result = DataCallHandlerMethod(ref client, safeClientCall); return result; } </code></pre> <p>Basically pass the username parameter from my calling method and that username parameter is already defined. I don't want to define it when the delegate is invoked. Is there any way to do this using c#?</p>
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    1. USJosh R
    1. USJosh R
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      1. VTUpMod
    1. COI have edited your title. Please see, "[Should questions include “tags” in their titles?](http://meta.stackexchange.com/questions/19190/)", where the consensus is "no, they should not".
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      1. POhow to pass a service reference delegate into a generic method with error handling
      1. USJohn Saunders
    2. COyou approach will require making use of reflections are u okay with using reflection in your code
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      1. POhow to pass a service reference delegate into a generic method with error handling
      1. USAjay Beniwal
    3. COI'm okay with using reflection in my code, but the solution where I new up the service ref at the call site and pass a ref to it along with a delegate of the method and its parameters seems like it will work.
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      1. POhow to pass a service reference delegate into a generic method with error handling
      1. USJosh R
 

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