今天遇到另外一种上传图片方法

用jquery.fileupload.js

  <input type="file" name="file[]" multiple id="fileupload">

 

一个文件类型的元素

$("#fileupload").fileupload({

datatype:"json",

url: "/File/UploadFiles",

done: function (e, data) { //上传结束的操作 

if (data.result[0].result != "OK") //不成功的时候 弹出消息

{

alert(data.result[0].result);

}

else

{

$("#imgshow").attr("src", data.result[0].thumbnail_url); //成功的时候显示图片

}

}

})

 

上面的url 处理当选择完成图片后进行的上传操作

 public string path = "~/Files";

[HttpPost]        public ActionResult UploadFiles()        {            var r = new List
     
      ();            foreach (string file in Request.Files)            {                var statuses = new List
      
       ();                var headers = Request.Headers;                if (string.IsNullOrEmpty(headers["X-File-Name"]))                {                    UploadWholeFile(Request, statuses);                }                else                {                    UploadPartialFile(headers["X-File-Name"], Request, statuses);                }                JsonResult result = Json(statuses);                result.ContentType = "text/plain";                return result;            }            return Json(r);        }
      
     

上面是uploadfiles方法。

ViewDataUploadFilesResult是定义的文件类

public class ViewDataUploadFilesResult    {        public string name { get; set; }        public int size { get; set; }        public string type { get; set; }        public string url { get; set; }        public string delete_url { get; set; }        public string thumbnail_url { get; set; }        public string delete_type { get; set; }        public string result { set; get; }    }

有名字尺寸类型等属性

UploadWholeFile上传整个文件

private void UploadWholeFile(HttpRequestBase request, List
     
       statuses)        {            for (int i = 0; i < request.Files.Count; i++)            {                string result = ISValid(request.Files[i], "image");                if (result!= "OK")                {                    statuses.Add(new ViewDataUploadFilesResult() { result=result});                }            }            if (statuses.Count > 0) return;            for (int i = 0; i < request.Files.Count; i++)            {                var file = request.Files[i];                               if (!Directory.Exists(StorageRoot))                {                    Directory.CreateDirectory(StorageRoot);                }                string fileExt = Path.GetExtension(file.FileName).ToLower();                string newFileName = DateTime.Now.ToString("yyyyMMddHHmmss_ffff", DateTimeFormatInfo.InvariantInfo) + fileExt;                var fullPath = Path.Combine(StorageRoot, newFileName);                file.SaveAs(fullPath);                statuses.Add(new ViewDataUploadFilesResult()                {                    result = "OK",                    name = newFileName,                    size = file.ContentLength,                    type = file.ContentType,                    url = Path.Combine(path, Path.GetFileName(newFileName)),                    delete_url = "/Home/Delete/" + newFileName,                    thumbnail_url = @"data:image/png;base64," + EncodeFile(fullPath),                    delete_type = "GET",                });            }        }
     

private void UploadPartialFile(string fileName, HttpRequestBase request, List
     
       statuses)        {            if (request.Files.Count != 1) throw new HttpRequestValidationException("Attempt to upload chunked file containing more than one fragment per request");            var file = request.Files[0];            string result = ISValid(file, "image");            if (result != "OK")            {                statuses.Add(new ViewDataUploadFilesResult() { result = result });            }            if (statuses.Count > 0) return;            var inputStream = file.InputStream;            if (!Directory.Exists(StorageRoot))            {                Directory.CreateDirectory(StorageRoot);            }            string fileExt = Path.GetExtension(file.FileName).ToLower();            string newFileName = DateTime.Now.ToString("yyyyMMddHHmmss_ffff", DateTimeFormatInfo.InvariantInfo) + fileExt;            var fullName = Path.Combine(StorageRoot, newFileName);            using (var fs = new FileStream(fullName, FileMode.Append, FileAccess.Write))            {                var buffer = new byte[1024];                var l = inputStream.Read(buffer, 0, 1024);                while (l > 0)                {                    fs.Write(buffer, 0, l);                    l = inputStream.Read(buffer, 0, 1024);                }                fs.Flush();                fs.Close();            }            statuses.Add(new ViewDataUploadFilesResult()            {                result="OK",                name = newFileName,                size = file.ContentLength,                type = file.ContentType,                url = Path.Combine(path, Path.GetFileName(newFileName)),                delete_url = "/Home/Delete/" + newFileName,                thumbnail_url = @"data:image/png;base64," + EncodeFile(fullName),                delete_type = "GET",            });        }
     

上传部分文件

private string ISValid(HttpPostedFileBase file,string dirName)        {                       //定义允许上传的文件扩展名            Hashtable extTable = new Hashtable();            extTable.Add("image", "gif,jpg,jpeg,png,bmp");            extTable.Add("flash", "swf,flv");            extTable.Add("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");            extTable.Add("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");            //最大文件大小            int maxSize = 1000000;            String fileName = file.FileName;            String fileExt = Path.GetExtension(fileName).ToLower();            if (file.InputStream == null || file.InputStream.Length > maxSize)            {                return "上传文件大小超过限制。";            }            if (String.IsNullOrEmpty(fileExt) || Array.IndexOf(((String)extTable[dirName]).Split(','), fileExt.Substring(1).ToLower()) == -1)            {                return "上传文件扩展名是不允许的扩展名。\n只允许" + ((String)extTable[dirName]) + "格式。";            }            return "OK";        }

isvalid验证上传文件是否合理

private string EncodeFile(string fileName)        {            return Convert.ToBase64String(System.IO.File.ReadAllBytes(fileName));        }

[HttpGet]        public void Delete(string id)        {            var filename = id;            var filePath = Path.Combine(Server.MapPath("~/Files"), filename);            if (System.IO.File.Exists(filePath))            {                System.IO.File.Delete(filePath);            }        }