C#用正则表达式批量改文件名

用正则表达式批量改文件名，遍历文件目录，可以控制层数

        /**//// <summary>
        /// 指定文件夹下文件名批量替换
        /// </summary>
        /// <param name="pattern">The pattern.</param>
        /// <param name="replacement">The replacement.</param>
        /// <param name="path">路径</param>
        /// <param name="depth">扫描目录层数,0表示不限制层数</param>
        public static void FileNameReplace(string pattern,string replacement, string path, int depth)
        ...{
            if (depth < 0) throw new Exception("depth must >=0");

                DirectoryInfo mainDir;
                mainDir = new DirectoryInfo(path);
                //遍历文件
                foreach (FileInfo f in mainDir.GetFiles())
                ...{
                    //增加文件
                    string fileName=Regex.Replace(f.Name, pattern, replacement);
                    //if (fileName != f.Name)WL(f.Name+" "+fileName);
                    try
                    ...{
                        if (fileName != f.Name) 
                        ...{
                            f.MoveTo(Path.Combine(path, fileName));
                            Console.WriteLine("Replace "+f.Name+"to "+fileName);
                        }
                    }
                    catch (Exception ex)
                    ...{
                        Console.WriteLine(ex.Message);
                        continue;
                    }
                }
                //遍历文件目录
                if (depth == 0)
                ...{
                    foreach (DirectoryInfo d in mainDir.GetDirectories())
                    ...{
                        //递归调用
                        FileNameReplace(pattern,replacement, Path.Combine(path, d.Name), 0);
                        
                    }
                }
                else if (depth == 1)
                ...{
                }
                else
                ...{
                    foreach (DirectoryInfo d in mainDir.GetDirectories())
                    ...{
                        //递归调用
                        FileNameReplace(pattern, replacement, Path.Combine(path, d.Name), depth - 1);
                    }
                }

        }

    public static void Main()
    ...{
        FileNameReplace(@"(.*).htm", @"$1.jsp", @"\10.10.22.244zhong_ao_xin", 0);
    }