1、文件读写操作
using System;using System.IO;using System.Text;class Test{ public static void Main() { string path = @"c:\temp\MyTest.txt"; try { // 创建文件，如果文件存在则覆盖该文件。 using (FileStream fs = File.Create(path)) { byte[] info = new UTF8Encoding(true).GetBytes("https://www.wonhero.com"); // 向文件添加一些信息。 fs.Write(info, 0, info.Length); } // 打开流并读取它。 using (StreamReader sr = File.OpenText(path)) { string s = ""; while ((s = sr.ReadLine()) != null) { Console.WriteLine(s); } } } catch (Exception ex) { Console.WriteLine(ex.ToString()); } }}
2、使用HttpClient实现请求提交上传的文件
static async Task Main(string[] args) { await TryUpload(); } private const string Boundary = "EAD567A8E8524B2FAC2E0628ABB6DF6E"; private static readonly HttpClient HttpClient = new() { BaseAddress = new Uri("https://localhost:5001/") }; private static async Task TryUpload() { var requestContent = new MultipartFormDataContent(Boundary); requestContent.Headers.Remove("Content-Type"); requestContent.Headers.TryAddWithoutValidation("Content-Type", $"multipart/form-data; boundary={Boundary}"); var fileContent = await File.ReadAllBytesAsync(@"C:\\wonhero.png"); var byteArrayContent = new ByteArrayContent(fileContent); byteArrayContent.Headers.ContentType = MediaTypeHeaderValue.Parse("image/png"); requestContent.Add(byteArrayContent, "avatar", "Unbenannt.PNG"); var postResponse = await HttpClient.PostAsync("/api/Image", requestContent); }
3、后台文件上传API
[Route("api/[controller]")][ApiController]public class ImageController : ControllerBase{ // POST api/ [HttpPost] public void Post([FromForm] UserModel info) { var memoryStream = new MemoryStream(); info.Avatar.CopyTo(memoryStream); var bytes = memoryStream.ToArray(); }}public class UserModel{ [FromForm(Name = "avatar")] public IFormFile Avatar { get; set; } [FromForm(Name = "name")] public string Name { get; set; }}
