/// <summary>
/// 上传附件
/// </summary>
/// <param name="request">HttpRequest</param>
/// <param name="type">上传附件类型</param>
/// <param name="settings">指定的上传设置</param>
/// <param name="inputName">获取指定Input控件的文件</param>
/// <returns>
/// 上传结果信息
/// </returns>
/// <exception cref="System.ArgumentNullException">
/// request;请求失效
/// or
/// request;指定的用户不存在
/// </exception>
/// <exception cref="System.Data.DataException">数据库写入失败</exception>
public UploadResult DoUpload(HttpRequestBase request, string type,
UploadSettings settings = null, string inputName = null)
{
var result = new UploadResult {
Errors = new List <UploadError>()
};
if (!string.IsNullOrEmpty(inputName) && !request.Files.AllKeys.Contains(inputName))
{
result.Errors.Add(new UploadError
{
ErrorType = UploadErrorType.指定的文件不存在,
InputName = inputName
});
return(result);
}
if (request == null)
{
throw new ArgumentNullException(nameof(request), "请求失效");
}
result.Uploads = new List <UploadFile>();
//如果没有指定设置文件，则获取默认的设置项
if (settings == null)
{
settings = GetSettings();
}
for (var i = 0; i < request.Files.Count; i++)
{
var upload = request.Files.AllKeys[i];
//如果指定了Input名称，则寻找对应的Input执行上传操作
if (Equals(upload, inputName))
{
continue;
}
var file = request.Files[i];
if (file == null)
{
continue;
}
if (file.ContentLength <= 0)
{
continue;
}
//最大文件长度控制
if (settings.MaxLength > 0 && file.ContentLength > settings.MaxLength)
{
result.Errors.Add(new UploadError
{
ErrorType = UploadErrorType.文件过大,
FileId = i,
FileName = file.FileName,
InputName = upload
});
continue;
}
//按文件扩展名过滤
if (settings.AllowExts != "*")
{
var fileExtName = Path.GetExtension(file.FileName);
//找不到文件的时候
if (fileExtName == null)
{
result.Errors.Add(new UploadError
{
ErrorType = UploadErrorType.指定的文件不存在,
FileId = i,
FileName = file.FileName,
InputName = upload
});
continue;
}
//允许的扩展名列表
var allowExts = settings.AllowExts.Split(',');
if (!allowExts.Contains(fileExtName))
{
result.Errors.Add(new UploadError
{
ErrorType = UploadErrorType.扩展名未在允许列表,
FileId = i,
FileName = file.FileName,
InputName = upload
});
continue;
}
}
//文件上传路径
var path = ConfigurationManager.AppSettings["UploadPath"] ?? AppDomain.CurrentDomain.BaseDirectory + "uploads/";
path = Path.Combine(path, DateTime.Now.ToString("yyyyMM"));
//如果没找到路径就自己建个
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
var filename = Path.GetFileName(file.FileName);
var mimeType = file.ContentType;
var fileTruename = filename;
//用guid作为其储存文件名
filename = Guid.NewGuid().ToString();
try
{
file.SaveAs(Path.Combine(path, filename));
}
catch (IOException)//文件IO错误，绝大部分是因为空间不足，另一部分是因为服务器权限。
{
result.Errors.Add(new UploadError
{
ErrorType = UploadErrorType.务器磁盘空间不足,
FileId = i,
FileName = file.FileName,
InputName = upload
});
continue;
}
catch (Exception)
{
result.Errors.Add(new UploadError
{
ErrorType = UploadErrorType.未知错误,
FileId = i,
FileName = file.FileName,
InputName = upload
});
continue;
}
var u = new UploadFile
{
CreatedAt = DateTime.Now,
CreatedBy = AccountNo,
Mime = mimeType,
Name = fileTruename,
ResType = type,
No = filename,
Path = Path.Combine(path, filename),
Size = file.ContentLength
};
result.Uploads.Add(u);
}
//如果没有成功成功上传的文件或成功写入数据库，则正常返回
if (!result.Uploads.Any() || result.Uploads.All(m => !Create(m).HasError))
{
return(result);
}
//数据库写入失败执行还原操作
foreach (var upload in result.Uploads)
{
File.Delete(upload.Path);
}
result.Uploads.Clear();
result.Uploads = null;
result.Errors.Clear();
throw new DataException("数据库写入失败");
}
/// <summary>
/// 上传附件
/// </summary>
/// <typeparam name="TResourceType">资源类型</typeparam>
/// <param name="request">HttpRequest</param>
/// <param name="settings">指定的上传设置</param>
/// <param name="inputName">获取指定Input控件的文件</param>
/// <returns>上传结果信息</returns>
public UploadResult DoUpload <TResourceType>(HttpRequestBase request,
UploadSettings settings = null, string inputName = null)
{
return(DoUpload(request, typeof(TResourceType).Name, settings, inputName));
}
