c#復制文件夾和文件

/// <summary>
/// 拷貝文件夾
/// </summary>
/// <param name="srcdir"></param>
/// <param name="desdir"></param>
public static void CopyDirectory(string srcdir, string desdir)
{
string folderName = srcdir.Substring(srcdir.LastIndexOf("\\") + 1);

string desfolderdir = desdir + "\\" + folderName;

if (desdir.LastIndexOf("\\") == (desdir.Length - 1))
{
desfolderdir = desdir + folderName;
}
string[] filenames = Directory.GetFileSystemEntries(srcdir);

foreach (string file in filenames)// 遍歷所有的文件和目錄
{
if (Directory.Exists(file))// 先當作目錄處理如果存在這個目錄就遞歸Copy該目錄下面的文件
{
string currentdir = desfolderdir + "\\" + file.Substring(file.LastIndexOf("\\") + 1);
if (!Directory.Exists(currentdir))
{
Directory.CreateDirectory(currentdir);
}

CopyDirectory(file, desfolderdir);
}

else // 否則直接copy文件
{
string srcfileName = file.Substring(file.LastIndexOf("\\") + 1);

srcfileName = desfolderdir + "\\" + srcfileName;

if (!Directory.Exists(desfolderdir))
{
Directory.CreateDirectory(desfolderdir);
}

File.Copy(file, srcfileName, true);
}
}//foreach
}//function end