Multipart form data Web Api

Sometimes while creating asp.net mvc project we need to send files as some other values as parameters. So for achieving that we can do following steps

So first of all we will add the code to call the api. You have to go to the controller and add following code to call api

    public async Task<ActionResult> Index()
        {
            using (var httpClient = new HttpClient())
            using (var formData = new MultipartFormDataContent())
            {
                // Read the file as a byte array
                var filename = @"C:\Users\shubh\source\repos\RazorPay.zip"; //Change to Any file path of your system
                byte[] fileBytes = System.IO.File.ReadAllBytes(filename);

                // Create a ByteArrayContent from the file bytes
                var fileContent = new ByteArrayContent(fileBytes);

                // Add the file content to the form data
                formData.Add(fileContent, "file", "RazorPay.zip");

                var value1 = "123";
                var value2 = "Test";

                var parameter1content = new StringContent(value1, Encoding.UTF8);
                formData.Add(parameter1content, "parameter1");
                var parameter2content = new StringContent(value2, Encoding.UTF8);
                formData.Add(parameter2content, "parameter2");

                // Add additional values as StringContent

                var applicationVersion = string.Empty;
                applicationVersion = Path.GetFileNameWithoutExtension(filename).Split('_').LastOrDefault();

              
                HttpResponseMessage response = await httpClient.PostAsync("https://localhost:44383/api/FileUpload/Upload", formData);
                var responseBody = "";
                // Process the response as needed
                if (response.IsSuccessStatusCode)
                {

                    responseBody = await response.Content.ReadAsStringAsync();

                    // API call succeeded
                    // Do something with the response
                }
                else
                {
                    responseBody = await response.Content.ReadAsStringAsync();

                    // API call failed
                    // Handle the error
                }
            }

            return View();
        }

add following namespaces in the controller

using System.IO;
using System.Linq;
using System.Net.Http;
using System.Text;

Now since we have added functionality to call the api , we will add new api project and will add code to create the api. So add the following code

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using System.Web.Http;

namespace MultipartAPI.Controllers
{
    public class ValuesController : ApiController
    {
        // GET api/values

        [HttpPost]
        [Route("api/FileUpload/Upload")]
        public async Task<IHttpActionResult> UploadReleaseFile()
        {
            if (!Request.Content.IsMimeMultipartContent())
            {
                return BadRequest("Error : Invalid request. File is missing.");
            }

            try
            {
                // Read the multipart form data
                var provider = new MultipartFormDataStreamProvider(Path.GetTempPath());
                await Request.Content.ReadAsMultipartAsync(provider);

                // Get the file data
                var fileData = provider.FileData.FirstOrDefault();

                string filePath = provider.FileData[0].LocalFileName;
                string fileName = fileData.Headers.ContentDisposition.FileName.Trim('\"');

                string parameter1 = provider.FormData["parameter1"];
                string parameter2 = provider.FormData["parameter2"];
                if (!Directory.Exists(@"F:\Upload")) //Change path as per your system
                {
                    Directory.CreateDirectory(@"F:\Upload"); //Change path as per your system
                }
                // Save the file to the destination path
                File.Move(filePath, @"F:\Upload\" + fileName); //Change path as per your system
                return Ok("File Uploaded Successfully"); // Return a success response
            }
            catch (Exception ex)
            {
                return BadRequest("Error : " + ex.Message.ToString());
            }


        }
    }
}

 <system.web>
    <compilation debug="true" targetFramework="4.7.2" />
	  <httpRuntime targetFramework="4.7.2" maxRequestLength="600000000" />
  </system.web>
  <system.webServer>
	  <security>
		  <requestFiltering>
			  <requestLimits maxAllowedContentLength="600000000" />
		  </requestFiltering>
	  </security>
    <handlers>
      <remove name="ExtensionlessUrlHandler-Integrated-4.0" />
      <remove name="OPTIONSVerbHandler" />
      <remove name="TRACEVerbHandler" />
      <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
    </handlers>
  </system.webServer>