WebAPI method that takes a file upload and additional arguments

Question

I want to upload a file and send along with the file some additional information, let\'s say a string foo and an int bar.

How would I write a ASP.NET WebAPI

Answer 1

You can extract multiple files and multiple attributes in this way:

public async Task Post()
{
    Dictionary attributes = new Dictionary();
    Dictionary files = new Dictionary();

    var provider = new MultipartMemoryStreamProvider();
    await Request.Content.ReadAsMultipartAsync(provider);
    foreach (var file in provider.Contents)
    {
        if (file.Headers.ContentDisposition.FileName != null)
        {
            var filename = file.Headers.ContentDisposition.FileName.Trim('\"');
            var buffer = await file.ReadAsByteArrayAsync();
            files.Add(filename, buffer);
        } else
        {
            foreach(NameValueHeaderValue p in file.Headers.ContentDisposition.Parameters)
            {
                string name = p.Value;
                if (name.StartsWith("\"") && name.EndsWith("\"")) name = name.Substring(1, name.Length - 2);
                string value = await file.ReadAsStringAsync();
                attributes.Add(name, value);
            }
        }
    }
    //Your code here  
    return new HttpResponseMessage(HttpStatusCode.OK);
}