通過(guò)TextAsset類(lèi)讀取文檔

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Demo : MonoBehaviour
{
    public TextAsset texttest;
    void Start()
    {
        Debug.Log(texttest.text);
    }
}

通過(guò)File類(lèi)讀取文件

using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;

public class Demo : MonoBehaviour
{
    void Start()
    {
        string textTxtpath = File.ReadAllText(Application.streamingAssetsPath + "/test.txt");
        Debug.Log(textTxtpath);
    }
}

也可以使用File類(lèi)的ReadAllLines()函數(shù)，將這個(gè)文檔按照一行一行進(jìn)行全部讀?。?/span>

using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;

public class Demo5 : MonoBehaviour
{
    void Start()
    {
        string[] textTxt = File.ReadAllLines(Application.streamingAssetsPath + "/TextRead.txt");
        for (int i = 0; i < textTxt.Length; i++)
        {
            Debug.Log(textTxt[i]);
        }
    }
}

上面兩個(gè)函數(shù)都各自有一個(gè)重載函數(shù)：

public static string[] ReadAllLines(string path);
public static string[] ReadAllLines(string path, Encoding encoding);
public static string ReadAllText(string path, Encoding encoding);
public static string ReadAllText(string path);

可以以設(shè)定的文檔格式打開(kāi)文檔。

以文件流的形式讀取文檔

通過(guò)IO命名空間下的FileStream類(lèi)進(jìn)行讀取文檔數(shù)據(jù)：

這是第一種方式，通過(guò)FileStream類(lèi)的實(shí)例化方法去加載文件：

using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using UnityEngine;

public class Demo5 : MonoBehaviour
{
    void Start()
    {
        string path = Application.streamingAssetsPath + "/TextRead.txt";
        //文件流形式讀取文檔
        using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read))
        {
            byte[] bytes = new byte[fs.Length];
            fs.Read(bytes, 0, bytes.Length);
            fs.Close();
            string str= Encoding.UTF8.GetString(bytes);
            Debug.Log(str);
        }
    }
}

還可以通過(guò)File類(lèi)的OpenRead()函數(shù)加載文檔：

using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using UnityEngine;

public class Demo5 : MonoBehaviour
{
    void Start()
    {
        string path = Application.streamingAssetsPath + "/TextRead.txt";
        //文件流形式讀取文檔
        using (FileStream fs = File.OpenRead(Application.streamingAssetsPath + "/TextRead.txt"))
        {
            byte[] bytes = new byte[fs.Length];
            fs.Read(bytes, 0, bytes.Length);
            fs.Close();
            string str = Encoding.UTF8.GetString(bytes);
            Debug.Log(str);
        }
    }
}

以流形式讀取文檔

通過(guò)IO命名空間下的StreamReader類(lèi)以流形式讀取文檔：

using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using UnityEngine;

public class Demo5 : MonoBehaviour
{
    void Start()
    {
        string path = Application.streamingAssetsPath + "/TextRead.txt";
        //流形式讀取文檔
        using (StreamReader sr = new StreamReader(path))
        {
            string content = sr.ReadToEnd();
            sr.Close();
            sr.Dispose();
            Debug.Log(content);
        }
    }
}

還可以使用File類(lèi)的OpenText()函數(shù)以流形式讀取文檔：

using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using UnityEngine;

public class Demo5 : MonoBehaviour
{
    void Start()
    {
        string path = Application.streamingAssetsPath + "/TextRead.txt";
        //流形式讀取文檔
        using (StreamReader sr = File.OpenText(path))
        {
            string content = sr.ReadToEnd();
            sr.Close();
            sr.Dispose();
            Debug.Log(content);
        }
    }
}

修改數(shù)據(jù)保存文檔  通過(guò)File類(lèi)寫(xiě)入數(shù)據(jù)

還記得怎么讀取數(shù)據(jù)嗎？
File.ReadAllText()函數(shù)及ReadAllLines()函數(shù)
那么寫(xiě)入數(shù)據(jù)就使用：
File.WriteAllText()函數(shù)及ReadWriteLines()函數(shù)

using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using UnityEngine;

public class Demo5 : MonoBehaviour
{
    void Start()
    {
        string path = Application.streamingAssetsPath + "/TextRead.txt";
        File.WriteAllText(path, "測(cè)試數(shù)據(jù)");
    }
}

using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using UnityEngine;

public class Demo5 : MonoBehaviour
{
    void Start()
    {
        string path = Application.streamingAssetsPath + "/TextRead.txt";
        string[] content = { "測(cè)試數(shù)據(jù)1", "測(cè)試數(shù)據(jù)2", "測(cè)試數(shù)據(jù)3" };
        File.WriteAllLines(path, content);
    }
}

WriteAllText()是將整個(gè)文本保存到文檔中。
ReadWriteLines()函數(shù)是將一個(gè)string數(shù)組保存到文檔中。

通過(guò)文件流的形式寫(xiě)入數(shù)據(jù)

using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using UnityEngine;

public class Demo5 : MonoBehaviour
{
    void Start()
    {
        string path = Application.streamingAssetsPath + "/TextRead.txt";
        string content = "測(cè)試文檔";
        //文件流形式讀取文檔
        using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Write))
        {
            byte[] bytes = Encoding.UTF8.GetBytes(content);
            fs.Write(bytes, 0, bytes.Length);
            fs.Close();
        }
    }
}

通過(guò)流形式寫(xiě)入數(shù)據(jù)

using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using UnityEngine;

public class Demo5 : MonoBehaviour
{
    void Start()
    {
        string path = Application.streamingAssetsPath + "/TextRead.txt";
        string content = "測(cè)試文檔";
        using (StreamWriter sr = new StreamWriter(path))
        {
            sr.WriteLine(content);
            sr.Close();
            sr.Dispose();
            Debug.Log(content);
        }
    }
}

這些讀取的操作都需要引入IO命名空間。

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