ASP.NET Core–Sending Multipart Form data

I’m currently writing an API where I have to upload documents. To simplify the testing process, I created a small helper file to create the multipart/form-data.

Here is the helper file:

	internal class MultipartFormBuilder
	{
	private MultipartFormDataContent _form = new ();
	public MultipartFormBuilder()
	{
	}
	internal MultipartFormBuilder AddFile(string file, string name, string fileName=null)
	{
	var fileContent = new ByteArrayContent(File.ReadAllBytes(file));
	fileContent.Headers.ContentType = MediaTypeHeaderValue.Parse("multipart/form-data");
	_form.Add(fileContent, name, fileName: fileName ?? file);
	return this;
	}
	internal MultipartFormDataContent Build()
	{
	return _form;
	}
	}

view raw MultipartFormBuilder.cs hosted with ❤ by GitHub

And here is an example on how to use it:

	var client=new HttpClient();
	var form = new MultipartFormBuilder()
	.AddFile("document1.docx",name:"document1")
	.AddFile("document2.docx",name:"document2")
	.Build();
	var response = await client.PostAsync("/upload", form);

view raw Upload.cs hosted with ❤ by GitHub