使用c＃中的web Api上传文件

Question

I am trying to upload file using web api in c#. I tried in postman. It works properly. I was confuse how to do it in c# code . I have tried following code but it gives error.

var request = (HttpWebRequest)WebRequest.Create("http://Api_projects/add_project");
var postData = "name=thisIsDemoName&img=" + Server.MapPath(FileUpload1.FileName) +"&info=ThisIsDemoInfo";
var data = Encoding.ASCII.GetBytes(postData);
request.Method = "POST";
request.ContentType = "multipart/form-data";
request.ContentLength = data.Length;
using (var stream = request.GetRequestStream())
{
    stream.Write(data, 0, data.Length);
}
var response = (HttpWebResponse)request.GetResponse();
var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
Response.Write(responseString);

When run the code it write following error message on screen

A PHP Error was encountered Severity: Notice Message: Undefined index: img
Filename: controllers/Api_projects.php
Line Number: 27
Backtrace:
File: /home/fpipj1blp4wo/public_html/ecosense.in/application/controllers/Api_projects.php Line: 27 Function: _error_handler
File: /home/fpipj1blp4wo/public_html/ecosense.in/application/libraries/REST_Controller.php Line: 785 Function: call_user_func_array
File: /home/fpipj1blp4wo/public_html/ecosense.in/index.php Line: 315 Function: require_once

plz help

Answer 1

Sending multipart/form-data is a bit more complicated. Have a look at: Upload files with HTTPWebrequest (multipart/form-data)