IO流的使用

IO流的一般使用

string ce="测试";
File.WriteAllText(@"12.txt",ce,Encoding.UTF8);
 //Path类
string s1 = @"C:\a";
string s2 = "b.txt";
//combine处理末尾\问题
string s3 = Path.Combine(s1, s2);
Console.WriteLine(s3);
string g1 = @"c:\windows\test\a.txt";
// 1.获取文件名
Console.WriteLine(Path.GetFileName(g1));
// 2.获取目录
Console.WriteLine(Path.GetDirectoryName(g1));
//3.获取文件名不包括扩展名
Console.WriteLine(Path.GetFileNameWithoutExtension(g1));
//4.获取扩展名
Console.WriteLine(Path.GetExtension(g1));
//5.获取完整路劲../获取父目录
Console.WriteLine(Path.GetFullPath("12.txt"));
//6.获取当前用户临时目录
Console.WriteLine(Path.GetTempPath());
//7.获取一个随机的文件名（也可以用作文件夹名）
Console.WriteLine(Path.GetRandomFileName());
//8.获取一个随机的文件名，并在临时目录下创建这个文件
Console.WriteLine(Path.GetTempFileName());

StreamWriter字符串生成js文件

 string str = "hello";
 string path = "D:/newfdc";
 if (!Directory.Exists(path))
 {
     Directory.CreateDirectory(path);
 }
 string FileName ="hello.js";
 Encoding code = Encoding.GetEncoding("UTF-8");
 StreamWriter sw = new StreamWriter(Path.Combine(path, FileName), false, code);
 sw.Write(str);
 sw.Flush();
 sw.Close();
 Console.WriteLine("OK");
 Console.ReadKey();

file.copy使用

 string str = "hello";
 string path = "D:/newfdc";
 if (!Directory.Exists(path)) {
     Directory.CreateDirectory(path);
 }
 string FileName ="hello.js";
 Encoding code = Encoding.GetEncoding("UTF-8");
 string nowpath = Path.Combine(path, FileName);//现有文件
 string path2 = "E:/new";
 if (!Directory.Exists(path2)) {
     Directory.CreateDirectory(path2);
 }
 string name = "copy.js";
 File.Copy(nowpath,Path.Combine(path2,name),true);
 Console.WriteLine("复制成功");
 Console.ReadKey();

复制

  if (true)
  {
      path = System.Configuration.ConfigurationSettings.AppSettings["jsupload"].ToString();
      if (!Directory.Exists(path))
      {
          Directory.CreateDirectory(path);
      }
      File.Copy(localfileName, Path.Combine(path, ftpfileName), true);
  }
 return true;

StreamWriter和reader

 string mobile = "13628611111";
 StreamWriter writer = new StreamWriter("SMS.txt", true, Encoding.UTF8);
 writer.Write(mobile);
 writer.Write(",");
 writer.Flush();
 writer.Close();
 StreamReader reader = new StreamReader("SMS.txt");
string read= reader.ReadLine();
int i = 0;
int count = 0;
while (read.IndexOf(mobile, i) >= 0)
 {
 i=read.IndexOf(mobile,i)+1;
  count++;
 }
Console.WriteLine(count);
Console.ReadLine();

Serializable序列号案例

[Serializable]
public class ClassToSerialize
{
    public int id = 100;
    public string name = "Name";
    [NonSerialized]
    public string Sex = "男";
}

public void SerializeNow()
 {
     ClassToSerialize c = new ClassToSerialize();
     FileStream fileStream = new FileStream("c:\\temp.dat", FileMode.Create);
     BinaryFormatter b = new BinaryFormatter();
     b.Serialize(fileStream, c);
     fileStream.Close();
 }
 public void DeSerializeNow()
 {
     ClassToSerialize c = new ClassToSerialize();
     c.Sex = "kkkk";
     FileStream fileStream = new FileStream("c:\\temp.dat", FileMode.Open, FileAccess.Read, FileShare.Read);
     BinaryFormatter b = new BinaryFormatter();
     c = b.Deserialize(fileStream) as ClassToSerialize;
       Response.Write(c.name);
     Response.Write(c.Sex);
     fileStream.Close();
 }

//////////////////////////////
[Serializable]
public class XRentManager
{
   public XRentManager()
   {
       m_DicMyTraffics = new Dictionary<string, TrafficInfo>();
       m_DicRenteds = new Dictionary<string, TrafficInfo>();//出租集合
   }
   ///字典集合：保存可以出租的车
   private Dictionary<string, TrafficInfo> m_DicMyTraffics;
   internal Dictionary<string, TrafficInfo> DicMyTraffics
   {
        get { return m_DicMyTraffics; }
   }
    /// 获取可以出租的汽车集合
    private Dictionary<string, TrafficInfo> m_DicRenteds;
   /// <summary>
   /// 汽车入库或者出租的车回库
   /// </summary>
   internal Dictionary<string, TrafficInfo> DicRenteds
   {
     get { return m_DicRenteds; }
    }
 }
 #region 反序列化
 FileStream fs = new FileStream("Students.bin", FileMode.OpenOrCreate);
 BinaryFormatter bf = new BinaryFormatter();
 if (fs.Length > 0)
 {
     m_RM = bf.Deserialize(fs) as XRentManager;//反序列化
 }
 bf = null;
 fs.Close();
 fs.Dispose(); 
  //正序列化
 XRentManager m_RM = new XRentManager();
#region 序列化
 FileStream fs = new FileStream("Students.bin", FileMode.OpenOrCreate);
 BinaryFormatter bf = new BinaryFormatter();//创建序列化
 bf.Serialize(fs, m_RM);//保存
 bf = null;
 fs.Close();
 fs.Dispose(); 
 #endregion

Direcotry类（操作目录）

//1.创建一些目录
Directory.CreateDirectory("1");
//2.获取当前目录下的所有的直接子目录(文件夹)第二个参数包含"*I*"，第三个参数，是当前目录还是所有搜索
string [] dirs= Directory.GetDirectories(@"c:\");
foreach(string item in dirs ){
    Console.WriteLine(item);
}
//3.获取当前目录下的所有文件
string[] files = Directory.GetFiles(@"c:\");
foreach (string item in files) {
   Console.WriteLine(item);
}
//4.判断是否有这个目录返bool
Directory.Exists(@"C:\test1");
//5.删目录
Directory.Delete(@"C:\test1",true);
//6.移动，剪切，移动到同一个地方，改名字，就是重名
Directory.Move(@"C:\a.txt", @"C:\a\a.txt");

File类

    //1.判断文件是否存在？2.删除Delete
File.Exists(@"C:\1.txt");
    //2.读取也有对应的写入
File.ReadAllLines();File.ReadAllBytes();File.ReadAllText();

文件流 FileStream

 //1.创建一个文件流
 FileStream fs = new FileStream(@"c:\txt.txt", FileMode.OpenOrCreate);
 //2.读或写,每次读取的内容都有放在缓冲区中
 byte[] byts=new byte[fs.Length]; //设置、字节
 //第一个参数：文件中的字节读取到该数组中，0是从第0个索引开始放，第三个参数数最多读取的字长
 fs.Read(byts, 0, byts.Length);
 //文件流要关闭和释放
 fs.Close(); fs.Dispose();