asp.net大文件上传解决方案实例代码

#region 文件上传 可以带参数  [HttpPost("upload")]  public JsonResult uploadProject(IFormFile file, string userId)  {   if (file != null)   {    var fileDir = "D://aaa";    if (!Directory.Exists(fileDir))    {     Directory.CreateDirectory(fileDir);    }    //文件名称    string projectFileName = file.FileName;     //上传的文件的路径    string filePath = fileDir + $@"/{projectFileName}";    using (FileStream fs = System.IO.File.Create(filePath))    {     file.CopyTo(fs);     fs.Flush();    }    return Json("ok");   }else{    return Json("no");   }  }  #endregion

<template><div> <form>  <input type="text" value="" v-model="projectName" placeholder="请输入项目名称">  <input type="file" v-on:change="getFile($event)">  <button v-on:click="submitForm($event)">上传</button> </form></div></template> <script>///这个组件是用于上传bdls文件的组件export default { data() { return {  uploadURL: "/Home/Upload",  projectName: "",  file: "" }; }, methods: { getFile(event) {  this.file = event.target.files[0];  console.log(this.file); }, submitForm(event) {  event.preventDefault();  let formData = new FormData();  formData.append("file", this.file);   let config = {  headers: {   "Content-Type": "multipart/form-data"  }  };   this.$http  .post(this.uploadURL, formData, config)  .then(function(response) {   if (response.status === 200) {   console.log(response.data);   }  }); } }};</script> <style lang="scss" scoped></style>

<template><div> <el-upload  class="upload-css"  :file-list="uploadFiles"  ref="upload"  :on-success="upLoadSuccess"  :on-error="upLoadError"  :action="uploadURL"  :auto-upload="false">  <el-button slot="trigger" size="small" type="primary">选取文件</el-button>  <el-button style="margin-left: 10px;" size="small" type="success" @click="submitUpload">上传到服务器</el-button> </el-upload></div></template> <script>import Vue from "vue";import { Upload, Button } from "element-ui";Vue.use(Upload);Vue.use(Button); export default { props: [], data() { return {  projectName: "",  //uploadURL: "/project/upload?a=1",  uploadFiles: [] //上传的文件列表 }; }, computed: { //文件的上传路径 //附带用户id和项目名称 uploadURL: function() {  //var userId = this.$store.state.userId;  return "/project/upload?userId=" + 1; } }, methods: { //文件上传 submitUpload() {  this.$refs.upload.submit(); }, //文件上传成功时的钩子 upLoadSuccess(response, file, fileList) {  if (response == "ok") {  console.log(response + "已上传" + file);  console.log("项目添加成功");  } else {  console.log("项目添加失败");  } }, //文件上传失败时的钩子 upLoadError(response, file, fileList) {  console.log("项目添加失败"); } }};</script> <style lang="scss" scoped></style>

public FileResult downloadRequest()  {   //var addrUrl = webRootPath + "/upload/thumb.jpg";   var addrUrl = "D:/aaa/thumb.jpg";    var stream = System.IO.File.OpenRead(addrUrl);    string fileExt = Path.GetExtension("thumb.jpg");    //获取文件的ContentType    var provider = new FileExtensionContentTypeProvider();    var memi = provider.Mappings[fileExt];    return File(stream, memi, Path.GetFileName(addrUrl));  }

downloadRequest() {  let url = "Home/downloadRequest"; //可以在路径中传递参数 window.location.href = url; },第二种后端api ,两个api的返回类型不同，asp.net core 文件下载常用的有FileResult 、FileContentResult 、 FileStreamResult。 public FileContentResult downloadRequest1()  {   //string webRootPath = _hostingEnvironment.WebRootPath;   //var addrUrl = webRootPath + "/upload/thumb.jpg";   var addrUrl = "D:/aaa/wyy.exe";    /*var stream = System.IO.File.OpenRead(addrUrl);    string fileExt = Path.GetExtension("thumb.jpg");    //获取文件的ContentType    var provider = new FileExtensionContentTypeProvider();    var memi = provider.Mappings[fileExt];    return File(stream, memi, Path.GetFileName(addrUrl));*/    //return stream;   byte[] fileBytes = System.IO.File.ReadAllBytes(addrUrl);   string fileName = "wyy.exe";   return File(fileBytes, System.Net.Mime.MediaTypeNames.Application.Octet, fileName); //关键语句  }

<el-button type="primary" v-on:click="downloadRequest1">下载文件11</el-button>......... downloadRequest1() {  axios({  // 用axios发送post请求  method: "post",  url: "Home/downloadRequest1", // 请求地址 ，也可以传递参数  headers: {   //可以自定义header   gggg: "gggggggggggggggggggggggggggggggggggggggggggggggggggg" //可以携带token  },  responseType: "blob" // 表明返回服务器返回的数据类型  }).then(res => {  // 处理返回的文件流  //主要是将返回的data数据通过blob保存成文件  var content = res.data;  var blob = new Blob([content]);  var fileName = "wyy.exe"; //要保存的文件名称  if ("download" in document.createElement("a")) {   // 非IE下载   var elink = document.createElement("a");   elink.download = fileName;   elink.style.display = "none";   elink.href = URL.createObjectURL(blob);   document.body.appendChild(elink);   elink.click();   URL.revokeObjectURL(elink.href); // 释放URL 对象   document.body.removeChild(elink);  } else {   // IE10+下载   navigator.msSaveBlob(blob, fileName);  }  console.log(res);  }); }