一、txt文件
1. 写入txt文件
cs
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File.AppendAllText(@"C:\test.txt", text); // 向后追加
File.WriteAllText(@"C:\test.txt", text); // 覆盖之前的数据
2. 读取txt文件
cs
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string str = File.ReadAllText(@"C:\test.txt");
3. 获取当前程序的运行目录
cs
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string path = Directory.GetCurrentDirectory();
二、 创建文件夹
cs
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Directory.Exists(path); // 判断文件夹是否存在
Directory.CreateDirectory(path); // 创建文件夹
三、csv操作
1. 写入csv文件
cs
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tring path = @"C:\data.csv";
using(StreamWriter sw = new StreamWriter(path, true, Encoding.Default)){
StringBuilder sb = new StringBuilder(); // 创建一个字符串实例
// 写入数据
sb.Append(textBox1.Text).Append(textBox2.Text).Append(textBox3.Text)
sw.WriteLine(sb);
sw.Close();
sw.Dispose();
}
四、csv封装
cs
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace IcCogFrameGrabber连相机
{
public class FileOperate
{
public void SaveData(string data, string result)
{
string path = Directory.GetCurrentDirectory() + "\\Data";
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
//string fileName = path + "\\" + DateTime.Now.ToString("yyyy-MM-dd") + ".csv";
string fileName = $"{path}\\{DateTime.Now.ToString("yyyy-MM-dd")}.csv";
if (!File.Exists(fileName))
{
//创建文件流，传入文件路径，创建并写入
FileStream fs = new FileStream(fileName, FileMode.Create, FileAccess.Write);
//Encoding.Default 编码格式 允许写入中文内容
StreamWriter sw = new StreamWriter(fs, Encoding.Default);
//创建StringBuilder类型追加写入信息
StringBuilder sb = new StringBuilder();
sb.Append("时间").Append(",").Append("Data").Append(",").Append("Result");
sw.WriteLine(sb);
sw.Close();
sw.Dispose();
fs.Close();
fs.Dispose();
}
using (StreamWriter sw2 = new StreamWriter(fileName, true, Encoding.Default))
{
StringBuilder sb = new StringBuilder();
sb.Append(DateTime.Now.ToString("HH-mm-ss")).Append(",").Append(data).Append(",").Append(result);
sw2.WriteLine(sb);
}
}
public string ReadData()
{
string path = Directory.GetCurrentDirectory() + "\\Data";
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
//string fileName = path + "\\" + DateTime.Now.ToString("yyyy-MM-dd") + ".csv";
string fileName = $"{path}\\{DateTime.Now.ToString("yyyy-MM-dd")}.csv";
StreamReader sr = new StreamReader(fileName, Encoding.Default);
string str = sr.ReadToEnd();
return str;
}
}
}
五、自创csv写入方法
cs
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string data = "1,2,3,4,5\n";
File.AppendAllText(path + "\\data.csv", data);
MessageBox.Show("111");