一、ASP.NET MVC 实现上传下载
1.首先是Form表单提交
前台：
<form action='@Url.Action("Upload", "File")' method="post" enctype="multipart/form-data">
<input type="file" name="file" />
<input type="submit" value="提交" />
</form>
注意form标签已经包括了enctype标签，而method属性则设为”post”,这样设置并不多于因为默认的提交时通过HTTP get方式进行的。
后台：
public ActionResult Upload(HttpPostedFileBase file) { var fileName = file.FileName; var filePath = Server.MapPath(string.Format("~/{0}", "File")); file.SaveAs(Path.Combine(filePath, fileName)); return Content("上传成功"); }
2.前台：
a href='@Url.Action("Download", "File", new { fileName = "323152.jpg" })'>下载文件</a>
public FileStreamResult Download(string fileName) { string filePath = Server.MapPath(string.Format("~/{0}/{1}", "File", fileName)); FileStream fs = new FileStream(filePath, FileMode.Open); return File(fs, "text/plain", fileName); }
3.Ajax实现文件上传
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <script src="https://cdn.bootcss.com/jquery/1.10.2/jquery.min.js"></script> <title></title> </head> <body> <form id="uploadForm" enctype="multipart/form-data"> 文件:<input id="file" type="file" name="file"/> </form> <button id="upload">上传文件</button> </body> <script type="text/javascript"> $(function () { $("#upload").click(function () { var formData = new FormData($('#uploadForm')[0]); $.ajax({ type: 'post', url: "http://192.168.1.101:8080/springbootdemo/file/upload", data: formData, cache: false, processData: false, contentType: false, }).success(function (data) { alert(data); }).error(function () { alert("上传失败"); }); }); }); </script> </html>
二、Web.API 实现上传下载
/// <summary> /// 文件上传 /// </summary> public class UploadController : BaseController { [HttpPost] public Ret<object> PostUpload() { var httpRequest = HttpContext.Current.Request; List<string> list = new List<string>(); for (int i = 0; i < httpRequest.Files.Count; i++) { var file = httpRequest.Files[i]; if (file.ContentLength < 1 || file == null) continue; //文件存盘,返回Url list.Add(V9.Helper.Attach.Save(file)); } return new Ret<object>() { error = 0, msg = "上传成功！", data = list }; } }