.netcore 取消了之前.netframework的HttpPostedFileBase 。
整理了一个上传文件的流程，可以选择跳转或不跳转页面。
#引入jQuery以及 jQuery的jQuery.form.js,一定要先引入jQuery
<script src="../../../content/js/jquery.3.0.1.js"></script>
<script src="../../../content/js/jquery.form.js"></script>
<script>
function RuturnLoginResult() {
$(‘#UserLoginFrom‘).ajaxSubmit(function (data) {
alert(data);
})
return false;//这里必须要返回false，不然依然会跳转。
}
</script>
<body>
<form class="form-horizontal" method="post" enctype="multipart/form-data" action="/SysManager/FileSave" οnsubmit="return RuturnLoginResult();" id="UserLoginFrom">
<div>
<div>
<div class="col-md-6 input-group">
<span class="input-group-addon">选择恢复文件</span>
<input class="col-md-6" type="file" name="files" multiple /> <span class="input-group-btn">
<button type="button" class="btn btn-info btn-search" οnclick="dump()">...</button>
</span>
</div>
<input class="col-md-3 btn btn-info btn-search" type="submit" value="恢复备份" />
</div>
</div>
</form>
</body>
后台controller方法
public async Task<IActionResult> FileSave(List<IFormFile> files)
{
// fil = files;
var file = Request.Form.Files;
long size = files.Sum(f => f.Length);
string webRootPath = hostingEnvironment.WebRootPath;
string contentRootPath = hostingEnvironment.ContentRootPath;
foreach (var formFile in files)
{
if (formFile.Length > 0)
{
string fileExt = "doc";
/// string fileExt = GetFileExt(formFile.FileName); //文件扩展名，不含“.”
long fileSize = formFile.Length; //获得文件大小，以字节为单位
string newFileName = System.Guid.NewGuid().ToString() + "." + fileExt; //随机生成新的文件名
var filePath = webRootPath + "/upload/" + formFile.FileName;
using (var stream = new FileStream(filePath, FileMode.Create))
{
await formFile.CopyToAsync(stream);
}
}
}
return Json(filePath );
}
原文：https://www.cnblogs.com/lonelyxmas/p/12927513.html