Record the method of reading excel provided by unity and the solution to some pits encountered

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using Excel;
using System.IO;
using UnityEngine.Networking;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Data;



public class MoveCameraByMouse : MonoBehaviour
{
    
    public Transform CenObj;// Surrounding objects 
    public float speed;// Rotation speed 
    public float speedup;// Speed of rise 
    public GameObject CubePre;// Generated block 
    float xuanzhaun=180;// The rotation angle when generating 
    public GameObject weizhi;// Where the block is generated 
    int gaodu = 2;// Initial block height 
    int shuliang;// Read file assignment count 
    public GameObject ui;// Generated ui
    public GameObject flaggo;// Generated red flag 
    int toindex;// Read resource count 
    public Image[] tempImage;// Components 
    private    Texture2D pic;
   
    private   Sprite[] sp;//??
    
    public string[] diyihang;// Read excel Acceptance of the first line 
    public string[] dierhang;// The second line 
    public string[] disanhang;// The third line 

    public List<Texture> textureList;// Read all png
    private void Awake()
    {
    
      
       InvokeRepeating("shengcheng", 1f, 2f);// Generate the Ctrip of the object 
        GameReadExcel(); // Read excel
    }

    void Start()
    {
    
        string[] filePath = Directory.GetFiles(Application.streamingAssetsPath,"*.png");// Read all png
        StartCoroutine(LoadImage(filePath));
        //StartCoroutine(LoadTextureFromInternet());
    }
    void Update()
        {
    
        if (toindex<=0)// prevent index Crossing the boundary 
        {
    

            return;
        }
        transform.Rotate(Vector3.down*Time.deltaTime * speed, Space.World);// rotate 
        
       
            //transform.RotateAround(CenObj.position, Vector3.up, -30 * Time.deltaTime * speed);
            transform.Translate(transform.up * Time.deltaTime * speedup);
        xuanzhaun=xuanzhaun++;
        }
   
    // The distance and proximity of the lens 
    public  void shengcheng()// Generate 
        {
    

        if (toindex <= 0)
        {
    

            return;
        }
        gaodu = gaodu + 1;
        sp=new Sprite[toindex];
      GameObject go=  Instantiate(CubePre, weizhi.transform.position , Quaternion.Euler(0,-90, 0));
        go.GetComponent<Transform>().localScale = new Vector3(1f, gaodu, 1);
        
        GameObject to = Instantiate(ui, new Vector3(go.transform.position.x,go.transform.position.y+(go.transform.position.y/2)-0.5f,go.transform.position.z-0.53f), Quaternion.Euler(0,0,0));
        to.transform.parent = go.transform;
        Text[] ziwuti=to.GetComponentsInChildren<Text>();
        ziwuti[0].text = toindex.ToString();
        Text[] ziwutiname = to.GetComponentsInChildren<Text>();
        ziwutiname[1].text= diyihang[shuliang];
        Image[] ziwutiico=to.GetComponentsInChildren<Image>();
        //StartCoroutine(LoadTextureFromInternet());
        ziwutiico[0].sprite = Sprite.Create((Texture2D)textureList[shuliang], new Rect(0, 0, textureList[shuliang].width, textureList[shuliang].height), Vector2.zero);

       
        
        GameObject flag = Instantiate(flaggo, new Vector3(go.transform.position.x+0.2f, go.transform.position.y + (go.transform.position.y / 2)+1.5f, go.transform.position.z), Quaternion.Euler(0,-180 ,90));
        flag.transform.parent = go.transform;
        MeshRenderer mr = flag.GetComponent<MeshRenderer>();
        mr.material.mainTexture = textureList[shuliang];
        shuliang = shuliang + 1;
        toindex = toindex - 1;
    }
    IEnumerator LoadImage(string[] filePath)// Read all png
    {
    
        foreach (var item in filePath)
        {
    
            UnityWebRequest request = UnityWebRequestTexture.GetTexture(item);
            yield return request.SendWebRequest();
            textureList.Add(DownloadHandlerTexture.GetContent(request));
        }
    }

    //[System.Obsolete]
    //IEnumerator LoadTextureFromInternet()
    //{
    
    // tempImage = new Image[toindex];

    // for (int i = 0; i < toindex; i++)
    // {
    


    // UnityWebRequest request = new UnityWebRequest(Application.streamingAssetsPath +"/"+ dierhang[i]);
    // DownloadHandlerTexture texture = new DownloadHandlerTexture(true);
    // request.downloadHandler = texture;
    // yield return request.Send();
    // if (string.IsNullOrEmpty(request.error))
    // {
    
    // pic = texture.texture;
    // }

    // //tempImage = GameObject.Find("Image").GetComponent<Image>();
    // sp = Sprite.Create((Texture2D)pic, new Rect(0, 0, pic.width, pic.height), Vector2.zero);

    // tempImage[i].sprite = sp;
    // //Debug.Log(dierhang[i]);
    // //GameObject go = GameObject.Find("Cube");
    // //go.GetComponent<MeshRenderer>().material.mainTexture = pic;
    // }
    //}
    public void GameReadExcel()// Read excel
    {
    
        FileStream stream = File.Open(Application.streamingAssetsPath +"/config.xlsx", FileMode.Open, FileAccess.Read);
        //IExcelDataReader excelReader = ExcelReaderFactory.CreateBinaryReader(stream);
        IExcelDataReader excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream);

        DataSet result = excelReader.AsDataSet();

        toindex = result.Tables[0].Columns.Count;// Get the number of columns 
        int rows = result.Tables[0].Rows.Count;// Get the number of lines 


        // Start with the second line 
        //for (int i = 1; i < rows; i++)
        //{
    
        diyihang = new string[toindex];
        dierhang = new string[toindex];
        disanhang = new string[toindex];
        for (int j = 0; j < toindex; j++)
            {
    
            diyihang[j] = result.Tables[0].Rows[1][j].ToString();
            //Debug.Log(diyihang[j]);
            }
        //}
        for (int j = 0; j < toindex; j++)
        {
    
            dierhang[j] = result.Tables[0].Rows[2][j].ToString();
            //Debug.Log(dierhang);
        }
        for (int j = 0; j < toindex; j++)
        {
    
            disanhang[j] = result.Tables[0].Rows[3][j].ToString();
           // Debug.Log(disanhang);
        }
        
    }


}

On the first code , edition 2020.3.26f1c1, First, notice the namespace , The second import link ：https://pan.baidu.com/s/1N8tZ7nCg2Ak4LDplwYt3tQ?pwd=1234
Extraction code ：1234
To Assets Decompress , modify
118 If you don't download it here, go to the corresponding address of your installation package , The key point here is to remember ！！！ My address ：C:\Program Files\Unity\Hub\Editor\2020.3.26f1c1\Editor\Data\MonoBleedingEdge\lib\mono\unityjit
Remember to remember to remember ！！！
The code is messy , After all, I don't just do this function ！ Again, this is just a record of the pit encountered , Choose the function you want , The function of this code is also relatively complete .