Creating a Generic Method for Instantiating Manager Clients in C# with Praxedo WSDL

Learn how to create a generic method in C# that efficiently instantiates manager clients generated from Praxedo WSDL, reducing redundant code.
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This video is based on the question https://stackoverflow.com/q/69395551/ asked by the user 'Brian Kessler' ( https://stackoverflow.com/u/427525/ ) and on the answer https://stackoverflow.com/a/69403088/ provided by the user 'Brian Kessler' ( https://stackoverflow.com/u/427525/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Streamlining C# SOAP Client Creation with Generics in Praxedo

In today's programming landscape, the emphasis on reusable code is paramount. This is particularly significant in scenarios where multiple services share similar functionalities, such as interacting with different SOAP APIs. One such case arises when working with Praxedo, where developers often need to instantiate various "manager clients" that inherit from different service contracts. But is there a way to simplify this process using C# ? Yes, you can create a generic method to handle instantiation, and in this post, we'll walk through how to achieve that while avoiding common pitfalls.

The Problem at Hand

When coding with Praxedo, developers often encounter runtime exceptions while trying to instantiate their manager clients using a factory method. The challenge here is ensuring that the correct types and parameters are provided during instantiation to avoid errors like System.MissingMethodException. Here's a quick setup of what this looks like in a typical scenario:

You have various manager clients, such as CustomerManagerClient and BusinessEventManagerClient, each generated from WSDL.

These clients inherit from ClientBase<TChannel> and implement specific interfaces.

Attempting to instantiate these clients generically may lead to constructor-related errors if not done correctly.

By creating a generic factory class for your clients, you can eliminate code duplication and streamline your SOAP client instantiation. Let's dive into how to create this factory class effectively.

Implementing the Generic Client Factory

Here’s an outline of how to create a generic method in C# for instantiating Praxedo manager clients.

Step 1: Define the Generic Class

Start by defining your factory class, as follows:

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Step 2: Create the Generic Method

Inside this class, create the generic method Create<T, TChannel>(), which will instantiate the clients:

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Step 3: Handle Serialization with the Right Binding Element

It’s crucial to ensure that your SOAP message encoding is set up correctly. Use the following method to set up your encoder:

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Step 4: Add Authorization Support

Incorporate a helper method to handle authorization for each client:

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A Common Pitfall: The Uri Conversion

While integrating generic practices, one common oversight is forgetting to convert the Uri endpoint parameter into an EndpointAddress when creating instances. Ensure you do not skip this step, as it can lead to the aforementioned missing constructor errors:

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This conversion is essential because passing a Uri type directly into the client constructor may not match the expected argument types, which can cause runtime issues.

Conclusion

Creating a generic method for instantiating various manager clients in C# can significantly enhance code reusability and maintainability, especially when working with services like Praxedo. By properly defining your generic factory class and method while accounting for the right parameters, you can streamline the instantiation process and reduce the chances of runtime errors.

Whether you're dealing with CustomerManagerClient, BusinessEventManagerClient, or any other manager clients, adopting this approach will save you time and reduce redundancy in your codebase, allowing you to focus on building robust applications. Happy coding!

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