1 [HttpPost]
2 public Task<Hashtable> ImgUpload()
3 {
4 // 检查是否是 multipart/form-data
5 if (!Request.Content.IsMimeMultipartContent("form-data"))
6 throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
7 //文件保存目录路径
8 string SaveTempPath = "~/SayPlaces/" + "/SayPic/SayPicTemp/";
9 String dirTempPath = HttpContext.Current.Server.MapPath(SaveTempPath);
10 // 设置上传目录
11 var provider = new MultipartFormDataStreamProvider(dirTempPath);
12 //var queryp = Request.GetQueryNameValuePairs();//获得查询字符串的键值集合
13 var task = Request.Content.ReadAsMultipartAsync(provider).
14 ContinueWith<Hashtable>(o =>
15 {
16 Hashtable hash = new Hashtable();
17 hash["error"] = 1;
18 hash["errmsg"] = "上传出错";
19 var file = provider.FileData[0];//provider.FormData
20 string orfilename = file.Headers.ContentDisposition.FileName.TrimStart('"').TrimEnd('"');
21 FileInfo fileinfo = new FileInfo(file.LocalFileName);
22 //最大文件大小
23 int maxSize = 10000000;
24 if (fileinfo.Length <= 0)
25 {
26 hash["error"] = 1;
27 hash["errmsg"] = "请选择上传文件。";
28 }
29 else if (fileinfo.Length > maxSize)
30 {
31 hash["error"] = 1;
32 hash["errmsg"] = "上传文件大小超过限制。";
33 }
34 else
35 {
36 string fileExt = orfilename.Substring(orfilename.LastIndexOf('.'));
37 //定义允许上传的文件扩展名
38 String fileTypes = "gif,jpg,jpeg,png,bmp";
39 if (String.IsNullOrEmpty(fileExt) || Array.IndexOf(fileTypes.Split(','), fileExt.Substring(1).ToLower()) == -1)
40 {
41 hash["error"] = 1;
42 hash["errmsg"] = "上传文件扩展名是不允许的扩展名。";
43 }
44 else
45 {
46 String ymd = DateTime.Now.ToString("yyyyMMdd", System.Globalization.DateTimeFormatInfo.InvariantInfo);
47 String newFileName = DateTime.Now.ToString("yyyyMMddHHmmss_ffff", System.Globalization.DateTimeFormatInfo.InvariantInfo);
48 fileinfo.CopyTo(Path.Combine(dirTempPath, newFileName + fileExt), true);
49 fileinfo.Delete();
50 hash["error"] = 0;
51 hash["errmsg"] = "上传成功";
52 }
53 }
54 return hash;
55 });
56 return task;
57 }
