#region 读取文件 //返回指定目录中的文件的名称(绝对路径) string[] files = System.IO.Directory.GetFiles(@"D:Test"); //获取Test文件夹下所有文件名称 string[] files2 = System.IO.Directory.GetFiles(@"D:Test","*",System.IO.SearchOption.AllDirectories); //获取指定目录下面指定格式的所有文件 DirectoryInfo di = new DirectoryInfo(@sourcepath.TrimEnd('\')); FileInfo[] files = new string[] { "*.xlsx", "*.csv", "*.xls" }.SelectMany(i => di.GetFiles(i, SearchOption.AllDirectories)).Distinct().ToArray(); #endregion