ASP.NET MVC WebAPI 上传图片实例 

 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 }

 

posted @ 2013-12-22 14:45  爱尚~为技术疯狂  阅读(3606)  评论(1)    收藏  举报