复制代码 代码如下:

[HttpPost]

public Task<Hashtable> ImgUpload()

{

// 检查是否是 multipart/form-data

if (!Request.Content.IsMimeMultipartContent("form-data"))

throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);

//文件保存目录路径

string SaveTempPath = "~/SayPlaces/" + "/SayPic/SayPicTemp/";

String dirTempPath = HttpContext.Current.Server.MapPath(SaveTempPath);

// 设置上传目录

var provider = new MultipartFormDataStreamProvider(dirTempPath);

//var queryp = Request.GetQueryNameValuePairs();//获得查询字符串的键值集合

var task = Request.Content.ReadAsMultipartAsync(provider).

ContinueWith<Hashtable>(o =>

{

Hashtable hash = new Hashtable();

hash["error"] = 1;

hash["errmsg"] = "上传出错";

var file = provider.FileData[0];//provider.FormData

string orfilename = file.Headers.ContentDisposition.FileName.TrimStart('"').TrimEnd('"');

FileInfo fileinfo = new FileInfo(file.LocalFileName);

//最大文件大小

int maxSize = 10000000;

if (fileinfo.Length <= 0)

{

hash["error"] = 1;

hash["errmsg"] = "请选择上传文件。";

}

else if (fileinfo.Length > maxSize)

{

hash["error"] = 1;

hash["errmsg"] = "上传文件大小超过限制。";

}

else

{

string fileExt = orfilename.Substring(orfilename.LastIndexOf('.'));

//定义允许上传的文件扩展名

String fileTypes = "gif,jpg,jpeg,png,bmp";

if (String.IsNullOrEmpty(fileExt) || Array.IndexOf(fileTypes.Split(','), fileExt.Substring(1).ToLower()) == -1)

{

hash["error"] = 1;

hash["errmsg"] = "上传文件扩展名是不允许的扩展名。";

}

else

{

String ymd = DateTime.Now.ToString("yyyyMMdd", System.Globalization.DateTimeFormatInfo.InvariantInfo);

String newFileName = DateTime.Now.ToString("yyyyMMddHHmmss_ffff", System.Globalization.DateTimeFormatInfo.InvariantInfo);

fileinfo.CopyTo(Path.Combine(dirTempPath, newFileName + fileExt), true);

fileinfo.Delete();

hash["error"] = 0;

hash["errmsg"] = "上传成功";

}

}

return hash;

});

return task;

}