C#中的文件操作

2018-06-17 20:31:34来源:未知 阅读 ()

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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

 

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