C#使用WebClient实现文件上传的操作步骤

using System.IO;
using System.Web;
using System.Web.Mvc;

public class FileUploadController : Controller
{
    [HttpPost]
    public ActionResult Upload(HttpPostedFileBase file)
    {
        if (file != null && file.ContentLength > 0)
        {
            var filePath = Path.Combine(Server.MapPath("~/UploadedFiles"), Path.GetFileName(file.FileName));
            file.SaveAs(filePath);
            return Json(new { success = true, message = "File uploaded successfully!" });
        }
        return Json(new { success = false, message = "No file uploaded." });
    }
}

@{
    ViewBag.Title = "File Upload";
}

<h2>File Upload</h2>

<form id="uploadForm" enctype="multipart/form-data" method="post" action="/FileUpload/Upload">
    <input type="file" name="file" />
    <input type="submit" value="Upload" />
</form>

using System;
using System.Net;

class Program
{
    static void Main()
    {
        using (WebClient client = new WebClient())
        {
            client.Headers.Add("Content-Type", "multipart/form-data");
            string url = "http://x302.net.yourserver/FileUpload/Upload"; // 替换为你的上传 URL
            string filePath = @"C:\path\to\your\file.txt"; // 替换为你的文件路径

            try
            {
                byte[] response = client.UploadFile(url, "POST", filePath);
                string result = System.Text.Encoding.UTF8.GetString(response);
                Console.WriteLine(result);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error: " + ex.Message);
            }
        }
    }
}