.Net 中操作文本文件

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一、写入文本

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.IO;namespace PlaceUsingTxt{    public class ClassWriteTxt    {        public ClassWriteTxt(string url)        {            TxtUrl = url;            fs = new FileStream(TxtUrl, FileMode.Create, FileAccess.ReadWrite);            sw = new StreamWriter(fs);        }        public void close()        {            sw.Close();            fs.Close();        }        protected string TxtUrl;        protected FileStream fs;        protected StreamWriter sw;        public void TxtToBegin()        {            sw.BaseStream.Seek(0, SeekOrigin.Begin);        }        public void TxtToEnd()        {            sw.BaseStream.Seek(0, SeekOrigin.End);        }        public void WriteLineIntoTxt(string s)        {            sw.WriteLine(s);            sw.Flush();        }        public void WriteIntoTxt(string s)        {            sw.Write(s);            sw.Flush();        }    }}

二读文本

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.IO;namespace PlaceUsingTxt{    public class ClassReadTxt    {        public ClassReadTxt(string url)        {            TxtUrl = url;            fs = new FileStream(TxtUrl, FileMode.Open, FileAccess.ReadWrite);            sr = new StreamReader(fs);        }        public void close()        {            sr.Close();            fs.Close();        }        protected string TxtUrl;        protected FileStream fs;        protected StreamReader sr;        public void TxtToBegin()        {            sr.BaseStream.Seek(0, SeekOrigin.Begin);        }        public void TxtToEnd()        {            sr.BaseStream.Seek(0, SeekOrigin.End);        }        //逐行读取文本，存于动态数组arraylist中        public System.Collections.ArrayList ReadTxtIotoArray()        {            System.Collections.ArrayList arr = new System.Collections.ArrayList();            while (sr.Peek() > 0)            {                arr.Add(sr.ReadLine());            }            return arr;        }        //将array赋给string二维数组，适用于逗号分割的且上下对齐的文本        public string[,] OutStr2D()        {            this.TxtToBegin();            System.Collections.ArrayList arr = this.ReadTxtIotoArray();            int RowCount = arr.Count;            if (RowCount == 0)            {                return null;            }                       //取得文本列数            string[] strtest = arr[0].ToString().Split(',');            int ColumnCount = strtest.Length;            string[,] s = new string[RowCount,ColumnCount];            for (int i = 1; i <= RowCount ; i++)            {                string[] stest = arr[i - 1].ToString().Split(',');                for (int j = 1; j <= ColumnCount; j++)                {                    s[i - 1, j - 1] = stest[j - 1];                }            }            return s;        }    }}