.NET Core 文件的上传与下载

1 <form action="/Home/Index" method ="post" enctype="multipart/form-data" > 2 ????<input type="file" multiple/>3 ????<input id="upload" type="submit" />4 </form>

 1 ???[HttpPost] 2 ????????public IActionResult Index(List<IFormFile> files) 3 ????????{ 4 ????????????5 ????????????foreach (var file in files) 6 ????????????{ 7 ????????????????//获取文件名 8 ????????????????var fileName = file.FileName; 9 ????????????????//保存在wwwroot文件夹下10 ????????????????fileName = hostingEnv.WebRootPath + $"\\{fileName}";12 ????????????????using (FileStream fs = System.IO.File.Create(fileName))13 ????????????????{14 ????????????????????file.CopyTo(fs);15 ????????????????????fs.Flush();16 ????????????????}17 ????????????}18 ????????????return View();19 ????????}

 <form action="/Home/Index" method ="post" enctype="multipart/form-data" > 
 ????<input type="file" multiple/>
 ????<input type="text" name="Name"/>
 ????<input id="upload" type="submit" /> 
 </form>

 ???????/// <summary> ???????/// 表单上传文件 ???????/// </summary> ???????/// <param name="files"></param> ???????/// <returns></returns> ???????[HttpPost] ???????public IActionResult Index(FormObject obj) ???????{ ???????????foreach (var file in obj.Files) ???????????{ ???????????????//获取文件名 ???????????????var fileName = ContentDispositionHeaderValue ???????????????????????????????.Parse(file.ContentDisposition) ???????????????????????????????.FileName ???????????????????????????????.Trim(‘"‘); ???????????????fileName = hostingEnv.WebRootPath + $"\\{fileName}"; ???????????????using (FileStream fs = System.IO.File.Create(fileName)) ???????????????{ ???????????????????file.CopyTo(fs); ???????????????????fs.Flush(); ???????????????} ???????????} ???????????return View(); ???????}

//模型类public class FormObject{ ??????public List<IFormFile> Files{ get; set; } ??????public string Name { get; set; }}

 ???<input type="text" name="Name" value="123"/> ???????<input type="file" id="fileUpload" name="fileUpload" multiple/> ???<input id="upload" type="button" value="ajax 提交"/>

<script type="text/javascript"> ???$(function () { ???????$("#upload").click(function (evt) { ???????????///取选择的文件加入FormData中 ???????????var fileUpload = $("#fileUpload").get(0); ???????????var files = fileUpload.files; ???????????var data = new FormData(); ???????????for (var i = 0; i < files.length; i++) { ???????????????data.append(files[i].name, files[i]); ???????????} ??????????// data.append("Name", $(‘input[name="Name"]‘).val()) ???????????$.ajax({ ???????????????type: "POST", ???????????????url: "http://192.168.0.175:8095/api/Organization", ???????????????contentType: false, ???????????????processData: false, ???????????????data: data, ???????????????success: function (message) { ???????????????????alert(message); ???????????????}, ???????????????error: function () { ???????????????????alert("上传文件出现错误！"); ???????????????} ???????????}); ???????}); ???});</script>

 ???????/// <summary> ???????/// 通过ajax上传 ???????/// </summary> ???????/// <returns></returns> ???????public IActionResult UploadFiles() ???????{var files = Request.Form.Files; ???????????var value =Request.Form.First(c => c.Key == "Name").Value;//获得表单文本项 ???????????foreach (var file in files) ???????????{ ???????????????var fileName = file.FileName; ???????????????fileName = hostingEnv.WebRootPath + $@"\{fileName}";using (FileStream fs = System.IO.File.Create(fileName)) ???????????????{ ???????????????????file.CopyTo(fs); ???????????????????fs.Flush(); ???????????????} ???????????} ???????????return RedirectToAction("/Export", new { Title ="1",Name = 123}); ???????}

 1 ???????[HttpGet] 2 ????????public IActionResult ExportText() 3 ????????{ 4 ????????????5 ????????????string sFileName = $@"qmhuangtext{DateTime.Now.ToString("yyyyMMddHHmmss")}.txt"; 6 ????????????FileStream fs =new FileStream(sFileName,FileMode.OpenOrCreate); 7 ????????????StreamWriter sw = new StreamWriter(fs); 8 ????????????sw.WriteLine("Hello world"); 9 ????????????sw.Flush();10 ????????????sw.Close();11 ????????????fs.Close();12 ????????????return File(new FileStream(sFileName, FileMode.Open), "application/octet-stream", $"导出测试{DateTime.Now.ToString("yyyyMMddHHmmss")}.txt");13 ????????}