读取和保存txt文件

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涉及知识点

读取文件内容；
创建文件夹和文件，并写入内容；
以覆盖的方式写入内容，以添加的方式写入内容；

读取和保存txt文件源码

using UnityEngine;

using System.Text.RegularExpressions;
using System;
using System.Net;
using System.Text;
using System.Threading;
using System.IO;
using UnityEngine.UI;

public class ReadAndSaveText : MonoBehaviour
{
public InputField input;
public Toggle isAdd;
public Text showSaveData;
public Text showReadData;

private WebClient myWebClient = new WebClient();
private string url = "http://www.163.com";
private string userDocPath;
private string directory;
private string filePath;

protected void Start()
{
#if UNITY_STANDALONE_LINUX
userDocPath = Environment.GetEnvironmentVariable("HOME");//home目录
#elif UNITY_STANDALONE_WIN
userDocPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);//文档目录
#endif
directory = userDocPath + "/.Test";
filePath = directory + "/Test.txt";
Debug.Log("Save data directory: " + directory);
}

public void ReadData()
{
string readData = null;
if (Directory.Exists(directory) && File.Exists(filePath))
{
using (StreamReader read = new StreamReader(filePath, Encoding.Default))
{
readData = read.ReadToEnd();
}
}

showReadData.text = "读取内容：\n" + readData;
}

public void SaveData()
{
string data = input.text;

Debug.Log("Saving data file.");

if (!Directory.Exists(directory))
Directory.CreateDirectory(directory);

if (!File.Exists(filePath))
{
Debug.Log("Creating new data file.");

//创建文件并写入内容，同时换行
FileStream fs = new FileStream(filePath, FileMode.Create);
StreamWriter sw = new StreamWriter(fs);
sw.WriteLine(data);

sw.Flush();
sw.Close();
fs.Close();

showSaveData.text += "\n" + data;
}
else
{
if (!isAdd.isOn)
{
//覆盖内容，同时换行
using (StreamWriter sw = new StreamWriter(filePath))
{
sw.WriteLine(data);
}

showSaveData.text = "保存内容：\n" + data;
}
else
{
//在已有的文本后添加新的内容，同时换行
using (StreamWriter sw = File.AppendText(filePath))
{
sw.WriteLine(data);
}

showSaveData.text += "\n" + data;
}
}

Debug.Log("Save data success.");
}

}

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