/// <summary>
///
/// </summary>
/// <param name="postedFile"></param>
/// <returns></returns>
public static FileEntity CreateFileEntity(HttpPostedFileBase postedFile, string uploadDir = "Uploads", string strDir = "")
{
//Random random = new Random(unchecked((int)DateTime.Now.Ticks));
string fileName = Path.GetFileName(postedFile.FileName);
string fileExtName = Path.GetExtension(postedFile.FileName);
if (!string.IsNullOrEmpty(fileExtName) && fileExtName.Length > 1)
{
fileExtName = fileExtName.Substring(1);
}
string fileType = postedFile.ContentType.ToLower();
int fileSize = postedFile.ContentLength;
//string newFileName = string.Format("{0}{1}.{2}",
// (Environment.TickCount & int.MaxValue).ToString(),
// random.Next(1000, 9999).ToString(),
// fileExtName);
string newFileName = string.Format("{0}.{1}",
Guid.NewGuid().ToString("n"),
fileExtName);
if (fileType == "application/octet-stream")
{
fileType = GetContentType(fileExtName);
}
string saveDir = GetSavePathByDate();
if (!string.IsNullOrEmpty(strDir))
{
saveDir = strDir + "/" + saveDir;
}
FileEntity entity = new FileEntity();
entity.Name = newFileName;
entity.ExtName = fileExtName;
entity.Path = saveDir.Replace(Path.DirectorySeparatorChar, '/') + newFileName;
entity.Size = fileSize;
entity.Type = fileType;
entity.SourceName = fileName;
return(entity);
}
/// <summary>
/// 上传文件
/// </summary>
/// <param name="postedFile"></param>
/// <param name="uploadDir"></param>
/// <param name="strDir"></param>
/// <param name="logger"></param>
/// <param name="serverUtility"></param>
/// <returns></returns>
public static async Task <FileEntity> UploadFileAsync(HttpPostedFileBase postedFile, string uploadDir, string strDir = "")
{
try
{
FileEntity entity = CreateFileEntity(postedFile, uploadDir, strDir);
string uploadPath = uploadDir;
if (string.IsNullOrEmpty(uploadPath))
{
uploadPath = "Uploads";
}
var saveDir = entity.Path.Substring(0, entity.Path.LastIndexOf('/'));
uploadPath = GetMapPath(uploadDir);
uploadPath = uploadPath.TrimEnd('\\') + "\\" + saveDir;
if (!Directory.Exists(uploadPath))
{
Directory.CreateDirectory(uploadPath);
}
string filePath = uploadPath + Path.DirectorySeparatorChar + entity.Name;
using (var fs = new FileStream(
path: filePath,
mode: FileMode.Create,
access: FileAccess.Write,
share: FileShare.None,
bufferSize: BUFFER_SIZE,
useAsync: true))
{
var buffer = new byte[BUFFER_SIZE];
int numRead;
while ((numRead = await postedFile.InputStream.ReadAsync(buffer, 0, buffer.Length)) != 0)
{
await fs.WriteAsync(buffer, 0, buffer.Length);
}
}
return(entity);
}
catch (Exception ex)
{
throw ex;
}
}