使用Microsoft.AspNetCore.WebUtilities.MultipartReader因为它…

可以解析任何流[带]最小缓冲。 它一次一个地为您提供每个部分的标题和正文，然后您使用该部分的主体（缓冲区，丢弃，写入磁盘等）执行您想要的操作。

这是一个中间件示例。

 app.Use(async (context, next) => { if (!IsMultipartContentType(context.Request.ContentType)) { await next(); return; } var boundary = GetBoundary(context.Request.ContentType); var reader = new MultipartReader(boundary, context.Request.Body); var section = await reader.ReadNextSectionAsync(); while (section != null) { // process each image const int chunkSize = 1024; var buffer = new byte[chunkSize]; var bytesRead = 0; var fileName = GetFileName(section.ContentDisposition); using (var stream = new FileStream(fileName, FileMode.Append)) { do { bytesRead = await section.Body.ReadAsync(buffer, 0, buffer.Length); stream.Write(buffer, 0, bytesRead); } while (bytesRead > 0); } section = await reader.ReadNextSectionAsync(); } context.Response.WriteAsync("Done."); }); 

这是助手。

 private static bool IsMultipartContentType(string contentType) { return !string.IsNullOrEmpty(contentType) && contentType.IndexOf("multipart/", StringComparison.OrdinalIgnoreCase) >= 0; } private static string GetBoundary(string contentType) { var elements = contentType.Split(' '); var element = elements.Where(entry => entry.StartsWith("boundary=")).First(); var boundary = element.Substring("boundary=".Length); // Remove quotes if (boundary.Length >= 2 && boundary[0] == '"' && boundary[boundary.Length - 1] == '"') { boundary = boundary.Substring(1, boundary.Length - 2); } return boundary; } private string GetFileName(string contentDisposition) { return contentDisposition .Split(';') .SingleOrDefault(part => part.Contains("filename")) .Split('=') .Last() .Trim('"'); } 

外部参考

在您的Controller您只需使用Request.Form.Files来访问文件：

上述就是C#学习教程：处理ASP.NET Core 1.0上的大型文件上传分享的全部内容，如果对大家有所用处且需要了解更多关于C#学习教程，希望大家多多关注—计算机技术网(www.ctvol.com)!

 [HttpPost("upload")] public async Task UploadAsync(CancellationToken cancellationToken) { if (!Request.HasFormContentType) return BadRequest(); var form = Request.Form; foreach(var formFile in form.Files) { using(var readStream = formFile.OpenReadStream()) { // Do something with the uploaded file } } return Ok(); }