public void FindAllDir(int ProgramId, string FilePath, string strPRE)
{

if (FilePath == "" || !Directory.Exists(FilePath))
{
return;
}
else
{
try
{
DirectoryInfo di = new DirectoryInfo(FilePath);
FileInfo[] fis = di.GetFiles();
foreach (FileInfo fi in fis)
{
//略
[color=#FF0000] //为什么在调用getFileHash方法时 会出现一定几率的 文件被占用 的异常[/color]
modelProgramFile.PFL_MD5 = getFileHash(fi.FullName);
//略

}
DirectoryInfo[] dis = di.GetDirectories();
foreach (DirectoryInfo diInfo in dis)
{
//略
FindAllDir(ProgramId, diInfo.FullName, strPRE);
}

}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
}

public static string getFileHash(string filePath)
{

using (MD5 md5 = MD5.Create())
{
using (FileStream file = new FileStream(filePath, FileMode.Open))
{
byte[] hashByte = md5.ComputeHash(file);
StringBuilder sBuilder = new StringBuilder();
for (int i = 0; i < hashByte.Length; i++)
{
sBuilder.Append(hashByte[i].ToString("x2"));
}
string result = sBuilder.ToString();
return result.ToUpper();
}
}
}