Web API post method to send image

Question

I need to code a method in a WebAPI application where I need to send an Image, this is what I'm doing:

 public IHttpActionResult PostPicture(string xmit, int contactNum, [FromBody] byte[] picture) { Image img = null; using (var ms = new MemoryStream(picture)) { img = Image.FromStream(ms); } if (img != null) { return Ok(); } else { return BadRequest(); } }

The problem is that when I'm sending the byte[] into the body in the request the value of the picture parameter is always null. I'm using Postman to test the method and the request body is being send as a x-www-form-urlencoded. Could anyone help me to find what I'm doing wrong?

that looks like base64 encoding. have you tried changing it (the parameter) to a string and then converting to byte array — Nkosi
– Nkosi, Commented Nov 14, 2017 at 13:20
@Nkosi No I didn't try that, I will do and I let you know. Thanks — Jose Raul Perera
– Jose Raul Perera, Commented Nov 14, 2017 at 13:21
Another option would be to remove the parameter and read it directly from the request imageStream = await Request.Content.ReadAsStreamAsync() — Nkosi
– Nkosi, Commented Nov 14, 2017 at 13:23
@Nkosi I change the code to get string parameters but it keeps getting null I really don't know why — Jose Raul Perera
– Jose Raul Perera, Commented Nov 14, 2017 at 13:27
I can not understand why someone could vote down a programming question without let people know why is the reason for, I don't see any problem in this question at all, who did please explain why? So the next time we don't make the same mistake — Jose Raul Perera
– Jose Raul Perera, Commented Nov 14, 2017 at 13:31

Jose Raul Perera · Accepted Answer · 2017-11-14 13:51:11Z

Thanks to @Nkosi, this solved the problem: Another option would be to remove the parameter and read it directly from the request imageStream = await Request.Content.ReadAsStreamAsync() actually it didn't work before because the way I was doing the request in Postman. Thanks again

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