public string GetFileMD5(string filename)
{
filename = filename.ToUpper();
var dirPath = Path.GetDirectoryName(filename).ToUpper();
if (!File.Exists(filename))
{
return("FILE_NOT_EXISTS");
}
// 先从缓存取，缓存没有加载目录下所有文件信息，若再没有生成MD5
SFileInfo sfileInfo = this.DBFileInfoCache
.SingleOrDefault(x => x.Path == filename);
if (sfileInfo == null && this.DBFileInfoCache.Count(x => x.DirPath.StartsWith(dirPath)) <= 0)
{
this.DBFileInfoCache.AddRange(this.db.SFileInfos
.Where(x => x.DirPath == dirPath));
}
sfileInfo = this.DBFileInfoCache
.SingleOrDefault(x => x.Path == filename);
if (sfileInfo != null)
{
return(sfileInfo.MD5);
}
return(MD5Helper.GetMD5HashFromFile(filename));
}
public void AddFileInfoIfNotExists(IList <ScanFileInfo> scanFileInfos)
{
foreach (var item in scanFileInfos)
{
var dbfileInfo = this.DBFileInfoCache.SingleOrDefault(x => x.Path == item.Path.ToUpper());
if (dbfileInfo != null)
{
if (dbfileInfo.Size == item.Size &&
dbfileInfo.MD5 == item.MD5)
{
continue;
}
dbfileInfo.Size = item.Size;
dbfileInfo.MD5 = item.MD5;
continue;
}
var sfileInfo = new SFileInfo();
sfileInfo.Id = Guid.NewGuid().ToString().ToUpper();
sfileInfo.Path = item.Path.ToUpper();
sfileInfo.DirPath = Path.GetDirectoryName(item.Path).ToUpper();
sfileInfo.Ext = Path.GetExtension(item.Path).ToUpper();
sfileInfo.MD5 = item.MD5.ToUpper();
sfileInfo.FileName = Path.GetFileName(item.Path).ToUpper();
sfileInfo.Size = FileHelper.HumanReadableFilesize(item.Path);
this.db.SFileInfos.Add(sfileInfo);
}
this.db.SaveChanges();
}
