讀書筆記（FileInfo DirectoryInfo）

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　　.net內建類型中提供了FileInfo和DirectoryInfo兩個類型，用於操作檔案和檔案夾，有別於File 和Directory， FileInfo 和DirectoryInfo主要用於操作檔案和檔案夾系統中的結構，完成諸如建立，複製，讀取資訊，移動，判斷是否存在，刪除等功能

 1        static void ReadFileInfo(FileInfo fi)  2         { 3             Console.WriteLine("fileName: "+fi.Name); 4             Console.WriteLine("fileDirectoryName: "+fi.DirectoryName); 5             Console.WriteLine("fileLength: "+fi.Length); 6             Console.WriteLine("fileCreationTime "+fi.CreationTime); 7             Console.WriteLine("fileLastWriteTime "+fi.LastWriteTime); 8             Console.WriteLine("fileLastAccessTime "+fi.LastAccessTime); 9             Console.WriteLine("fileFullName "+fi.FullName);10             Console.WriteLine("fileExtension "+fi.Extension);11         }12 13         static void ReadDirectoryInfo(DirectoryInfo di) 14         {15             Console.WriteLine("DirectoryName: " +di.Name);16             Console.WriteLine("DirectoryParentName: "+di.Parent.Name);17             Console.WriteLine("DirectoryLastWriteTime: "+di.LastWriteTime);18             Console.WriteLine("DirectoryLastAccessTime: "+di.LastAccessTime);19             Console.WriteLine("DirectoryFullName: "+di.FullName);20             FileInfo[] fis = di.GetFiles();21             foreach (FileInfo fi in fis)22                 ReadFileInfo(fi);23             DirectoryInfo[] dis = di.GetDirectories();24             foreach (DirectoryInfo ndi in dis)25                 ReadDirectoryInfo(ndi);26         }27 28         static void DirectoryTest() 29         {30             DirectoryInfo di = null;31             try32             {33                 di = new DirectoryInfo("C:\\Test");34                 di.Create();35                 di.CreateSubdirectory("subDi");36                 FileInfo info = new FileInfo("C:\\Test\\subDi\\test.txt");37                 using (FileStream fs = info.Create()) { }38                 ReadDirectoryInfo(di);39                 di.MoveTo("C:\\Test2");40             }41             finally 42             {43                 if (di != null) 44                 {45                     //刪除檔案夾46                     //一起刪除檔案和子檔案夾47                     di.Delete(true);48                 }49             }50         }51 52         static void FileTest() 53         {54             FileInfo info = null;55             FileInfo newinfo = null;56             try57             {58                 info = new FileInfo("C:\\test1.txt");59                 using (FileStream fs = info.Create()) { }60                 ReadFileInfo(info);61                 info.MoveTo("C:\\test2.txt");62                 newinfo = info.CopyTo("C:\\test3.txt");63                 ReadFileInfo(newinfo);64             }65             finally 66             {67                 if (info != null)68                     info.Delete();69                 if (newinfo != null)70                     newinfo.Delete();71             }72         }