複製某一目錄下的所有文件

class App
{
 /// <summary>
 /// 複製指定目錄的所有文件,不包含子目錄
 /// </summary>
 /// <param name="sourceDir">原始目錄</param>
 /// <param name="targetDir">目標目錄</param>
 /// <param name="overWrite">如果爲true,表示覆蓋同名文件,否則不覆蓋</param>
 public static void CopyFiles(string sourceDir, string targetDir, bool overWrite)
 {
  CopyFiles(sourceDir, targetDir, overWrite, false);
 }
 /// <summary>
 /// 複製指定目錄的所有文件
 /// </summary>
 /// <param name="sourceDir">原始目錄</param>
 /// <param name="targetDir">目標目錄</param>
 /// <param name="overWrite">如果爲true,覆蓋同名文件,否則不覆蓋</param>
 /// <param name="copyDir">如果爲true,包含目錄,否則不包含</param>
 public static void CopyFiles(string sourceDir, string targetDir, bool overWrite, bool copyDir)
 {
  string[] fileEntries = Directory.GetFiles(sourceDir);
  if (overWrite)
  {
   foreach (string fileName in fileEntries)
   {
    File.Copy(fileName, targetDir + fileName.Substring(fileName.LastIndexOf("//")), true);
    //Console.WriteLine(fileName+"-->"+targetDir+fileName.Substring(fileName.LastIndexOf("//")));
   }
  }
  else
  {
   foreach (string fileName in fileEntries)
   {
    if (!File.Exists(targetDir + fileName.Substring(fileName.LastIndexOf("//"))))
    {
     File.Copy(fileName, targetDir + fileName.Substring(fileName.LastIndexOf("//")));
     //Console.WriteLine(fileName+"-->"+targetDir+fileName.Substring(fileName.LastIndexOf("//")));
    }
   }
  }
  if (copyDir)
  {
   foreach (string subDir in Directory.GetDirectories(sourceDir))
   {
    string newSubDir = targetDir + subDir.Substring(subDir.LastIndexOf("//"));
    if (!Directory.Exists(newSubDir))
     Directory.CreateDirectory(newSubDir);
    CopyFiles(subDir, newSubDir, overWrite, copyDir);
   }
  }
 }
}