#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",

  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" + 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);

  });

 }