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In versions before .NET Core 3.0 (including .NET Framework), HttpClient disposes the request HttpContent object for you. This is surprising default behavior (a violation of the principle of least surprise for sure). This causes multiple problems, but one of the main problems is it prevents you from reusing the HttpContent object (you’re greeted with an … Read more
In order to send a file in a request with HttpClient, add the file into a MultipartFormDataContent object, and send this object as the request content. Here’s an example: This sends the following multipart/form-data POST request: In this article, I’ll explain a few details about MultipartFormDataContent, and show a few other file-sending scenarios. MultipartFormDataContent Add() … Read more
When you’re developing a web API with file uploading, you can use Postman to send files in test requests. This simplifies development because you don’t have to write your own client-side code for sending the test requests. In this article, I’ll show how to upload a file with Postman by posting a file in a … Read more