How to provide File and some para. to POST API using Python/ C#?

Question

Team, I am trying to provide File and some para. as a input for API. Expecting output based on validation.

Even after providing both inputs correctly, I am getting File as null with length 0. Below are the details of my env:

• Windows 11
• API Automation
• POST method

How to provide File and some para. to POST API?

Answer 1

Some thing like this

   public void POST_GetClientList()
        {
            string url = "https://XXXXX.XXX.XXX/GetClientList";
            string OutPutdata = null;
            byte status = 0;
            string ResponsCode = null;


            var client = new HttpClient();
            var pairs = new List<KeyValuePair<string, string>>
                {
                    new KeyValuePair<string, string>("username", "[email protected]")
                };

            try
            {
                var content = new FormUrlEncodedContent(pairs);
                var response = client.PostAsync(url, content).Result;
                ResponsCode = response.ToString().Substring(12, 3);

            }
            catch (Exception)
            {

            }


            Assert.IsTrue(ResponsCode.Contains("200"));

        }