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$scope.doUpload = function () {
                            var formData = new FormData($("#uploadForm")[0]);                        $http({
                                method: 'POST',                            url: ProxyService + '/uploadfiles',                            data: formData,                            headers: {
     'Content-Type': undefined },                            transformRequest: angular.identity                         }).then(function (response) {
                                console.log(response);                        });                    }

将$http当做函数来使用，这时需要传入一个设置对象，用来说明如何构造XHR对象。$http({method:'GET',url:'/api/xxxx',params:{'name':'huitai'}); 其中设置对象可以包含以下主要的键：Method可以是：GET/DELETE/HEAD/JSONP/POST/PUTURL:绝对的或者相对的请求目标params:字符串或者对象这个键的值是一个字符串或对象，会被转换成查询字符串追加在URL后面。如果值不是字符串，会被JSON序列化。比如这个：//参数会转为？age=18的形式$http({params:{'age':18}});④data(字符串或者对象)这个对象中包含了将会被当作消息体发送给服务器的数据。通常在发送POST请求时使用。从AngularJS 1.3开始，它还可以在POST请求里发送二进制数据。要发送一个blob对象，你可以简单地通过使用data参数来传递它。后端接收不到AngularJS $http.POST异步后台无法获取请求参数解决方法就会报415/500之类的错误,如下图！

[HttpPost("uploadfiles")]        public async Task
     
       UploadFiles()        {
                .....            var files = Request.Form.Files;            if (files == null || files.Sum(f => f.Length) == 0)            {
                    return Ok(new CommonViewData {
     ErrorStr = "文件无效", IsSucceed = false });            }            else            {
                    foreach (var x in files)                {
                        using (var memoryStream = new MemoryStream())                    {
                           await x.CopyToAsync(memoryStream).ConfigureAwait(false);                        using (var package = new ExcelPackage(memoryStream))                        {
                                var worksheet = package.Workbook.Worksheets[0]; //获取工作簿                            ICollection
      
        ePPlus = StuEPPlusTool.Import(package, worksheet);                            #region 插入逻辑部分                            .....                            #endregion                        }                    }                }            }            return Ok(new CommonViewData {
     ErrorStr = "上传成功", IsSucceed = true });        }
      
     

public static ICollection
     
       Import(ExcelPackage package, ExcelWorksheet worksheet)        {            ICollection
      
        ePPlus = new List
       
        ();            var rowCount = worksheet.Dimension?.Rows;            var colCount = worksheet.Dimension?.Columns;            #region 检查文档格式            if (!rowCount.HasValue || !colCount.HasValue)            {                return ePPlus;                //return "文档表头或内容为空，请下载对应文档！";            }            if (!worksheet.Cells[3, 1].Value.Equals("Name") ||                !worksheet.Cells[3, 2].Value.Equals("NickeName") ||                !worksheet.Cells[3, 3].Value.Equals("Tel") ||                !worksheet.Cells[3, 4].Value.Equals("Address") ||                !worksheet.Cells[3, 5].Value.Equals("E-Mail"))            {                return ePPlus;                //return "文档表头或内容不对应，请下载对应文档！";            }            #endregion            #region  读取数据            for (int i = 4; i <= rowCount; i++)            {                 //i=几 取决模版开始行数                ePPlus.Add(new t                {                    Name = worksheet.Cells[i, 1].Value.ToString(),                    NickeName= worksheet.Cells[i, 2].Value.ToString(),                    Tel= worksheet.Cells[i, 3].Value.ToString(),                    Address= worksheet.Cells[i, 4].Value.ToString(),                    E-Mail= worksheet.Cells[i, 5].Value.ToString()                });            }            #endregion            return ePPlus;        }