Txthandler 使用属性，将TXT文件放在 解决方案\bin\ 文件夹下， 由程序自动搜索路径；避免了硬编码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Security.Cryptography.X509Certificates;
using System.Xml.Schema;
namespace Test1
{
class Program
{
class Txthander// 操作TXT文件类
{
private string filefullname;
public string Filefullname
{
set
{
filefullname = value;
}
get
{ return filefullname; }
}
public void GetAlltext(string filefullname)//方法：读取文件中的所有内容
{
string str1 = File.ReadAllText(filefullname);
Console.WriteLine(str1);
}
public void GetFirstLine(string filefullname)//读取文件中的第一行
{
string[] strs1 = File.ReadAllLines(filefullname);
int a = strs1.Length;
Console.WriteLine("首行：" + strs1[0]);
}
public void GetFinalLine(string filefullname)//读取最后一行字符
{
string[] strs1 = File.ReadAllLines(filefullname);
int a = strs1.Length;
Console.WriteLine("末行：" + strs1[a - 1]);
}
public void Streamread(string filefullname) //全读出????
{
StreamReader sR = File.OpenText(filefullname);
string nextLine;
while ((nextLine = sR.ReadLine()) != null)
{
Console.WriteLine(nextLine);
}
sR.Close();
}
public void WriteStringOverride(string filefullname, string strcontect) //内容写入文件且完全覆盖原TXT内的内容
{
Console.WriteLine("please input string what you want to write");
strcontect = Console.ReadLine();
File.WriteAllText(filefullname, strcontect);
}
public void WriteAfterFinalLine(string finalLine, string filefullname)//最后一行写入内容,不覆盖原来的内容
{
StreamWriter sw = new StreamWriter(filefullname, true);
Console.WriteLine("Please input what your want to input in the final line");
sw.WriteLine(finalLine);
sw.Close();
}
public string[] TransferFinalLineToNumber(string filefullname)//将file fullname中的内容最后一行转成一个字符串数组
{
string[] strs1 = File.ReadAllLines(filefullname);
int a = strs1.Length;
char[] seperator = { ‘ ‘ };
return strs1[a - 1].Split(seperator);
}
}
class ZhangDan : Txthander
{
public string TotalValue(string[] valuegroup)//将最后一行，重新计算total值并生成新的末行
{
double totalValue = 0;
for (int i = 0; i < valuegroup.Length - 1; i++)
{
totalValue += double.Parse(valuegroup[i]);
}
valuegroup[valuegroup.Length - 1] = Convert.ToString(totalValue);
string newValueGroup = string.Join(" ", valuegroup);
return newValueGroup;
}
public void CheckMoney(string filefullname)//进行不同账户中的金额转移
{
string[] valuegroup = TransferFinalLineToNumber(filefullname);//获取最后一行的数字，转化成数组
Console.WriteLine("Select the Source");
int sourceIndex = int.Parse(Console.ReadLine()) - 1;//源的序列号
double sourcePosition = double.Parse(valuegroup[sourceIndex]); //取出源序列号位置的初始值
Console.WriteLine("Select the target");
int targetIndex = int.Parse(Console.ReadLine()) - 1;//目标的序列号
double targetPosition = double.Parse(valuegroup[targetIndex]);//目标位置的值初始值
Console.WriteLine("Input the number that you want transfer");
double numberTotransfer = double.Parse(Console.ReadLine());//想要处理的值
sourcePosition -= numberTotransfer;
targetPosition += numberTotransfer;
valuegroup[sourceIndex] = Convert.ToString(sourcePosition);// 源位置更新后的值
valuegroup[targetIndex] = Convert.ToString(targetPosition);//目标位置更新后的值
WriteAfterFinalLine(TotalValue(valuegroup), filefullname);//将valuegroup整理格式后，做为末行写入filefullName中。
}
}
static void Main(string[] args)
{
var ta = new ZhangDan();
string fullName = System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName;
string[] path = fullName.Split(‘\\‘);
string fullpath = null;
for (int i = 0; i < path.Length - 2; i++)
{
fullpath = fullpath + path[i] + @"\";
}
ta.Filefullname = fullpath + @"a.txt";
ta.GetFirstLine(ta.Filefullname);//引用基类中的方法
ta.GetFinalLine(ta.Filefullname);//基类中的方法
ta.CheckMoney(ta.Filefullname);
Console.WriteLine("now your money is:");
ta.GetFirstLine(ta.Filefullname);
ta.GetFinalLine(ta.Filefullname);
Console.ReadKey();
Console.ReadKey();
}
}
}
注意：发布程序之后，路径变为以下 C:\users\Administrator\... ...\a.txt
账单1.2
原文：https://www.cnblogs.com/littlelhb/p/13027498.html
