C#文件上传功能，客户端winfrom服务端API

客户端上传代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

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

        private async void button1_Click(object sender, EventArgs e)
        {
    
    
            // 创建一个 OpenFileDialog 控件并设置相关属性
            OpenFileDialog openFileDialog = new OpenFileDialog();
            openFileDialog.Filter = "All Files (*.*)|*.*";
            openFileDialog.Multiselect = false;

            // 显示文件选择对话框
            DialogResult dialogResult = openFileDialog.ShowDialog();

            if (dialogResult == DialogResult.OK)
            {
    
    
                string filePath = openFileDialog.FileName;

                // 压缩文件
                string compressedFilePath = CompressFile(filePath);

                // 创建 HttpClient 对象
                using (HttpClient client = new HttpClient())
                {
    
    
                    // 构建上传请求的 Uri
                    string uploadUri = "http://localhost:10553/api/Default"; // 替换为你的远程 IIS 服务器地址

                    // 创建 MultipartFormDataContent 用于封装文件内容
                    MultipartFormDataContent content = new MultipartFormDataContent();

                    // 添加压缩后的文件内容到 MultipartFormDataContent
                    byte[] fileBytes = File.ReadAllBytes(compressedFilePath);
                    ByteArrayContent fileContent = new ByteArrayContent(fileBytes);
                    content.Add(fileContent, "file", Path.GetFileName(compressedFilePath));

                    try
                    {
    
    
                        // 发送上传请求
                        HttpResponseMessage response = await client.PostAsync(uploadUri, content);

                        // 检查响应状态码
                        if (response.IsSuccessStatusCode)
                        {
    
    
                            MessageBox.Show("文件上传成功！");
                        }
                        else
                        {
    
    
                            MessageBox.Show("文件上传失败！");
                        }
                    }
                    catch (Exception ex)
                    {
    
    
                        MessageBox.Show("文件上传失败：" + ex.Message);
                    }
                }

                // 删除压缩后的临时文件
                File.Delete(compressedFilePath);
            }
        }

        //采用ZIP压缩算法
        private string CompressFile(string filePath)
        {
    
    
            string compressedFilePath = Path.Combine(Path.GetDirectoryName(filePath), Path.GetFileNameWithoutExtension(filePath) + ".zip");

            using (FileStream originalFileStream = File.OpenRead(filePath))
            {
    
    
                using (FileStream compressedFileStream = File.Create(compressedFilePath))
                {
    
    
                    using (GZipStream compressionStream = new GZipStream(compressedFileStream, CompressionMode.Compress))
                    {
    
    
                        originalFileStream.CopyTo(compressionStream);
                    }
                }
            }

            return compressedFilePath;
        }



    }
}

服务端API接收代码：

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 WebAPI.Controllers
{
    
    
    public class DefaultController : ApiController
    {
    
    
        private string UploadFolder = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "UploadFolder");

        [HttpPost]
        public async Task<IHttpActionResult> Post()
        {
    
    
            if (!Request.Content.IsMimeMultipartContent("form-data"))
            {
    
    
                return StatusCode(HttpStatusCode.UnsupportedMediaType);
            }

            var provider = new MultipartMemoryStreamProvider();
            await Request.Content.ReadAsMultipartAsync(provider);

            // 创建文件夹（如果尚未存在）
            Directory.CreateDirectory(UploadFolder);

            foreach (var content in provider.Contents)
            {
    
    
                var fileName = GetFileName(content.Headers);
                var fileData = await content.ReadAsByteArrayAsync();

                // 将文件保存到本地文件夹中
                var filePath = Path.Combine(UploadFolder, fileName);
                using (var fileStream = new FileStream(filePath, FileMode.Create))
                {
    
    
                    await fileStream.WriteAsync(fileData, 0, fileData.Length);
                }
            }

            return Ok();
        }

        private string GetFileName(System.Net.Http.Headers.HttpContentHeaders headers)
        {
    
    
            var disposition = headers.ContentDisposition;
            var fileName = disposition.FileName.Trim('"');

            // 如果 fileName 为空，则可以根据需要生成唯一的文件名
            if (string.IsNullOrEmpty(fileName))
            {
    
    
                fileName = Guid.NewGuid().ToString();
            }

            return fileName;
        }
    }
}

对应在IIS上部署API，然后客户端上传即可。