excel表格vba编程的方法步骤(excel vba编程基础知识)
559
2022-05-30
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
namespace IOTest
{
class Program
{
static void Main(string[] args)
{
//判断文件是否存在
//file是静态类
string path = @"C:\Users\pengshiyu\Desktop\新建文本文档.txt";
if (File.Exists(path)) Console.WriteLine("file \""+path+"\" is exists");
else Console.WriteLine("file \""+path+"\" is not exists");
//创建文件,注意:需要把创建的文件流关闭
//方法一:try catch语句
//方法二:先判断不存在,再创建
string path1 = @"C:\Users\pengshiyu\Desktop\";
if (!File.Exists(path1 + "newFile.txt"))
{
FileStream filestream = File.Create(path1 + "newFile.txt");
filestream.Close();
Console.WriteLine("文件创建成功!");
}
else
Console.WriteLine("文件已经存在!");
//打开文件
//FileMode有六种枚举
string path2 = @"C:\Users\pengshiyu\Desktop\test.txt";
try
{
FileStream filestream = File.Open(path2,FileMode.Truncate);
byte[] writebyte = { (byte)'p', (byte)'s', (byte)'y', (byte)',', (byte)'t', (byte)'e', (byte)'s', (byte)'t' };
filestream.Write(writebyte,0,writebyte.Length);
filestream.Close();
Console.WriteLine("文件写入成功!");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
//文件复制
string pathSource = @"C:\Users\pengshiyu\Desktop\source\test.txt";
string pathDestination = @"C:\Users\pengshiyu\Desktop\destination\test.txt";
if (File.Exists(pathSource))
{
try
{
if (!File.Exists(pathDestination))
{
Console.WriteLine("请选择复制(1)还是移动(2):");
string choice = Console.ReadLine();
if (choice == "1")
{
//文件复制
File.Copy(pathSource, pathDestination, false);
Console.WriteLine("文件拷贝成功!");
Console.WriteLine("是否删除源文件?删除:1,不删除:2");
string delChoice = Console.ReadLine();
if (delChoice == "1")
{
//文件删除
File.Delete(pathSource);
Console.WriteLine("源文件删除成功!");
}
else if (delChoice == "2")
{
Console.WriteLine("不删除!");
}
else
{
Console.WriteLine("用户输入有误!");
}
}
else if (choice == "2")
{
//文件移动
File.Move(pathSource, pathDestination);
Console.WriteLine("文件移动成功!");
}
else
{
Console.WriteLine("文件存在,是否覆盖?是:1,否:2");
string choicecover = Console.ReadLine();
if (choicecover == "1")
{
File.Copy(pathSource, pathDestination, true);
Console.WriteLine("文件拷贝成功,覆盖完成!");
}
else if (choicecover == "2")
{
Console.WriteLine("文件拷贝失败,文件已存在!");
}
else
{
Console.WriteLine("输入有误!");
}
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
else
{
Console.WriteLine("源文件不存在");
}
Console.ReadKey();
}
}
}
C#
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