[dotnet core] web api file upload(feat. windows forms)

webserver 를 이용해 파일 업로드 기능을 만들다가 남겨놓으면 좋을거 같아 남깁니다.

코드는 아래 받으면 되고 Visual Studio 2017버전으로 작성이 되었습니다.

기본적인 코드를 소개(?)하겠습니다.

1. web server project create

1.1 Controllers folder - new controller

1.2 Code

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using System.IO;

namespace WebServer.Controllers
{
    [ApiController]
    public class FIleUploadController : ControllerBase
    {
        [HttpPost]
        [Route("api/fileuload")]
        public ActionResult FileUpload([FromForm]FileUploadModel std)
        {
            // Getting Name
            string name = std.Name;
            // Getting Image
            var image = std.File;
            // Saving Image on Server
            if (image.Length > 0)
            {
                using (var fileStream = new FileStream(image.FileName, FileMode.Create))
                {
                    image.CopyTo(fileStream);
                }
            }

            return Ok(new { status = true, message = "Student Posted Successfully" });
        }
    }

    public class FileUploadModel
    {
        public string Name { get; set; }
        public IFormFile File { get; set; }
    }
}

2. windows forms project create

2.1 Form1.cs Code(Ui는 첨부파일 참고)

using System;
using System.IO;
using System.Net.Http;
using System.Windows.Forms;

namespace WindowClient
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnFIleSelect_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog()
            {
                FileName = "Select a text file",
                Filter = "Text files (*.txt)|*.txt",
                Title = "Open text file",
                //InitialDirectory =
                RestoreDirectory = true
            };

            if (openFileDialog.ShowDialog() == DialogResult.OK)
            {
                //Get the path of specified file
                tbxFile.Text = openFileDialog.FileName;

                //Read the contents of the file into a stream
                //var fileStream = openFileDialog.OpenFile();

                //using (StreamReader reader = new StreamReader(fileStream))
                //{
                //    fileContent = reader.ReadToEnd();
                //}
            }
        }

        private async void btnFileUpload_Click(object sender, EventArgs e)
        {
            byte[] fileBytes = null;
            try
            {
                using (FileStream fileStream = new System.IO.FileStream(tbxFile.Text, FileMode.Open))
                {
                    fileBytes = new byte[fileStream.Length];
                    fileStream.Read(fileBytes, 0, fileBytes.Length);

                    HttpClient httpClient = new HttpClient();
                    MultipartFormDataContent form = new MultipartFormDataContent();

                    form.Add(new StringContent("John" /* value */), "Name" /* class member name */);
                    form.Add(new ByteArrayContent(fileBytes, 0, fileBytes.Length), "File" /* class member name */, "wwwFile" /* value(file name) */);
                    HttpResponseMessage response = await httpClient.PostAsync(tbxURL.Text, form);

                    if (response.IsSuccessStatusCode)
                    {
                        // process....
                    }
                }
            }
            catch (Exception ex)
            {
                // Exception ...
            }

        }
    }
}

테스트

1. WebServer 프로젝트 디버깅 시작

2. WindowsClient 프로젝트 디버깅 시작

참고 자료

https://dottutorials.net/dotnet-core-web-api-multipart-form-data-upload-file/

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