ADO.NET API+MVC实现文件上传及文件下载

文件上传：

API内容：

　　 /// <summary>
        /// 文件上传
        /// </summary>
        /// <returns></returns>
        [HttpPost]
        public int Upload()
        {
            if (HttpContext.Current.Request.Files.Count > 0)
            {
                //获取文件
                var file = HttpContext.Current.Request.Files[0];
                //获取上传文件的扩展名
                //首先将文件名按.切割
                var temp = file.FileName.Split('.');
                //获取扩展名
                var extendName = temp[temp.Length - 1];
                //获取路径
                var path = HttpContext.Current.Server.MapPath("~/Upload/");
                //判断路径是否存在
                if (Directory.Exists(path))
                {
                    Directory.CreateDirectory(path);
                }
                //文件重新命名
                var name = DateTime.Now.ToFileTime() + "." + extendName;
                //保存上传文件
                file.SaveAs(Path.Combine(path, name));
                //返回结果
                return 1;
            }
            else
            {
                return 0;
            }
        }

 MVC中视图：

@{
    ViewBag.Title = "APIIndex";
}

<h2>APIIndex</h2>

<form enctype="multipart/form-data">
    <input id="F1" type="file" />
    <input id="Button1" type="button" value="上传" onclick="upload()" />

</form>

<script>

    function upload() {
        var data = new FormData();
        //获取文件
        var file = document.getElementById("F1").files[0];
        //添加数据
        data.append("F1", file);
        $.ajax({
            url: 'http://localhost:44363/api/Default/Upload',
            type: 'post',
            data: data,
            contentType: false,//必须false才会自动加上正确的Content-Type
            processData: false,//必须false才会避开jQuery对 formdata 的默认处理，XMLHttpRequest会对 formdata 进行正确的处理
            success: function (d) {
                if (d > 0) {
                    alert("上传成功！");
                    return;
                } else {
                    alert("上传失败！");
                    return;
                }
            }
        });
    }
</script>

 

 

文件下载：

API内容：

　　 /// <summary>
        /// 响应对象，使用前先赋值
        /// </summary>
        public HttpResponse Response = HttpContext.Current.Response;

        /// <summary>
        /// 文件下载
        /// </summary>
        /// <returns></returns>
        [HttpGet]
        public void DowdLoad(string Url)
        {

            string filePath = HttpContext.Current.Server.MapPath(Url);
            FileInfo fs = new FileInfo(filePath);
            //获取文件名
            string downFileName = fs.Name;
            //获取服务器端物理路径
            string sourceFileName = fs.FullName;
           
           
            //判断物理路径是否存在
            if (File.Exists(sourceFileName))
            {
                Response.Clear();
                Response.ClearHeaders();
                Response.ClearContent();
                Response.Buffer = true;
                Response.AddHeader("content-disposition", string.Format("attachment; FileName={0}", downFileName));
                Response.Charset = "GB2312";
                Response.ContentEncoding = Encoding.GetEncoding("GB2312");
                Response.ContentType = MimeMapping.GetMimeMapping(downFileName);
                Response.WriteFile(sourceFileName);
                Response.Flush();
                Response.Close();
            }
        }

MVC视图内容：

<a href = "https://localhost:44370/api/Default/DownLoad?Url=/FileUpload/132211303318715030.xls" > 下载 </ a >