inputformatter

ASP.NET Core – Receive a request with CSV data

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There are two ways to receive CSV data in a web API: In this article, I’ll show examples of both of these approaches. I’ll be using the CsvHelper library to parse CSV data into model objects and then do model validation. Note: To use CsvHelper, install the CsvHelper package (Install-Package CsvHelper). Or use whichever parser … Read more

ASP.NET Core – How to unit test a custom InputFormatter

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In this article, I’ll show how to unit test a custom InputFormatter. The main thing to test is the output of the ReadRequestBodyAsync() method. To test this, you have to pass in an InputFormatterContext object containing the request body. As an example, I’ll show how to unit test the following ReadRequestBodyAync() method: Note: This parses … Read more

ASP.NET Core – Add a custom InputFormatter

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Input formatters are used to deserialize the request body to a model object (which is then passed into an action method). There are built-in input formatters for handling JSON and XML. You can add your own input formatter when you want to customize request body deserialization. There are two scenarios where a custom InputFormatter would … Read more

ASP.NET Core – How to receive requests with XML content

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Receiving requests with XML content is straightforward. You have to register the built-in XML InputFormatter (otherwise you get 415 – Unsupported Media Type errors). When a request comes in with an XML Content-Type (such as application/xml), it uses this InputFormatter to deserialize the request body XML. In this article, I’ll show step-by-step how to receive … Read more

ASP.NET Core – How to receive a request with text/plain content

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When a request comes in and your action method has parameters, the framework tries to find the appropriate InputFormatter to handle deserializing the request data. There’s no built-in text/plain InputFormatter though, so when you send a request with text/plain content, it fails with a 415 – Unsupported Media Type error response. In this article, I’ll … Read more