c#讀mif文件及txt文件代碼
using System;
using System.IO;
using System.Collections;

namespace ReadMif
{
    class LoadMif
    { 
        //attribute
        private string m_File_Name;
        private System.IO.StreamReader m_fReader;     
        private System.Collections.ArrayList m_Sentence;
        private string[][] m_Words;    
  
       //private methord
       private void OpenFile()
      {
            try
            {
 if (m_File_Name==null)  
     throw new ArgumentNullException(); 
 if (!File.Exists(m_File_Name))  
                    throw new ArgumentException("Invalid file name"+m_File_Name);
 if (Path.GetExtension(m_File_Name)!=null&&!m_File_Name.EndsWith(".mif")&&!m_File_Name.EndsWith(".txt"))         throw new Exception("Invalid file type!");
       }
 //捕獲異常
 catch (ArgumentNullException ane)
 {
     Console.WriteLine(ane.ToString());
     return;
 }
 catch (ArgumentException ae)
 {
     Console.WriteLine(ae.ToString());
     return;
 }
 catch (Exception e)
 {
                    Console.WriteLine(e.ToString());
     return;
 }
 m_fReader=File.OpenText(m_File_Name);//設置打開并要進行讀取的文件
    }

      private void ReadFile()
      {
 string text_line;
 m_Sentence=new ArrayList();  //初始化arraylist對象
 while ((text_line=m_fReader.ReadLine())!=null);//只要文件未結束
 {
     if (text_line.Length==0)  //空行不讀
         continue;
     m_Sentence.Add(text_line); //將讀到的行添加到arraylist對象中
 }

    }

    private void PrintContext()
    {
 foreach(string line in m_Sentence)
 {
     System.Console.WriteLine(line);
 }
    }

    //public methord
    public void LoadMifFile(string mif_file)     //mif_file為該類與外界的接口，從外界傳入文件名
  {
      m_File_Name=mif_file; 
                //用成員變量存儲外界數據mif_file，用類成員變量實現內部數據流動
 //公共成員方法調用私有成員方法實現了底層操作的封裝
 //用戶只需也只能調用LoadMifFile來實現讀文件操作
      OpenFile();
      ReadFile();
      PrintContext();
  }  //end of loadmiffile function
}  //end of LoadMif class
}  //end of namespace

//通過外界主程序調用LoadMif類以實現讀mif文件
class MainEntry
{
    static void Main(string[] args)
    {
        ReadMif.LoadMif mif=new ReadMif.LoadMif();    //定義LoadMif類的實例并初始化
        if (args.Length==0)
 Console.WriteLine(@"Useage: ReadMif miffile.mif to print mif file context    on the screen.
For example:
ReadMif test.mif");
        else
            mif.LoadMifFile(args[0]); 
        return;
  }  //end of main 
}// end of MainEntry class