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[ASP.net教程]C#中的文件操作


读操作:

方法1:

string str = File.ReadAllText(@filepath, Encoding.Default);

方法2:

byte[] buffer = File.ReadAllBytes(@filepath);string str = Encoding.Default.GetString(buffer);

方法3:

string[] buffer = File.ReadAllLines(@filepath,Encoding.Default);string str = "" ;foreach (var buf in buffer){  str = str + buf +"\n";}

方法4:

FileStream fsRead = new FileStream(@filepath, FileMode.OpenOrCreate);byte[] buffer = new byte[1024 * 1024 * 5];int length = fsRead.Read(buffer, 0, buffer.Length);string str = Encoding.Default.GetString(buffer, 0, length);fsRead.Close();fsRead.Dispose();

方法5:

string str ="";using (FileStream fsRead = new FileStream(@filepath,  FileMode.OpenOrCreate,FileAccess.Read)){ byte[] buffer = new byte[1024 * 1024 * 5]; int length = fsRead.Read(buffer, 0, buffer.Length); str = Encoding.Default.GetString(buffer, 0, length);}

写操作:

方法1:

File.WriteAllText(@filepath, str, Encoding.Default);

方法2:

byte[] buffer = Encoding.Default.GetBytes(str);File.WriteAllBytes(@filepath,buffer);

方法3:

File.WriteAllLines(@filepath, str.Split(' '),Encoding.Default);

方法4:

FileStream fsWrite = new FileStream(@filepath, FileMode.OpenOrCreate, FileAccess.Write);byte[] buffer = Encoding.Default.GetBytes(str);fsWrite.Write(buffer, 0, buffer.Length);fsWrite.Close();fsWrite.Dispose();

方法5:

byte[] buffer = Encoding.Default.GetBytes(str);using (FileStream fsWrite = new FileStream(@filepath, FileMode.OpenOrCreate, FileAccess.Write)){ fsWrite.Write(buffer, 0, buffer.Length);}

操作文件夹:

CreateDirectory:创建文件夹

Delete:删除文件夹

Move:剪切文件夹

Exist:判断是否存在

GetFiles:获得指定的目录下所有文件的全路径

GetDirectory:获得指定目录下所有文件夹的全路径