<input type="file" name="file" webkitdirectory>

<input type="file" name="file" webkitdirectory><button id="upload" type="button" onclick="Upload()" >上传</button>

var files = [];$(document).ready(function () {$('input').change(function () {files = this.files;})});function Upload() {var data = new FormData();debuggerfor (var i = 0; i < files.length; i++) {data.append('file', files[i]);}var path = files[0].webkitRelativePath;$.ajax({type: "post",url: "/home/UpLoad",data: data,contentType: false,processData: false,success: function (data) {console.log(data);}})}

[HttpPost]public IActionResult UpLoad(){var files = Request.Form.Files;string rootpath = _hostingEnvironment.WebRootPath + @"\Files";try{foreach (var file in files){string[] arrpath = file.FileName.Split(@"/");string dirpath = "";//该文件的所在目录（包括一、二级目录）string filename = arrpath[arrpath.Length - 1].ToString();//该文件名for (int i=0;i<arrpath.Length;i++){if(i==arrpath.Length-1){break;}dirpath += arrpath[i]+@"/";}DicCreate(Path.Combine(rootpath, dirpath));//不存在则创建该目录string filepath = Path.Combine(rootpath, file.FileName);using (var addFile = new FileStream(filepath, FileMode.OpenOrCreate)){if (file != null){file.CopyTo(addFile);}else{Request.Body.CopyTo(addFile);}addFile.Close();}}return Ok(new{success = true,message = "上传成功"});}catch(Exception ex){return Ok(new{success = false,message = ex.Message});}}/// <summary>/// 文件目录如果不存在，就创建一个新的目录/// </summary>/// <param name="path"></param>private void DicCreate(string path){if (!Directory.Exists(path)){Directory.CreateDirectory(path);}}