写在前面

版本兼容问题走了许多弯路，令人非常火大。软件的更新，但是配套和支持往往没有跟上，甚至反而不兼容旧版本，而网上多数博客已经不再适用，故执笔记录，希望可以帮助到你。

相关安装包已上传网盘。

链接：https://pan.baidu.com/s/16cNlfe8_XTrW4p3HfgLUNQ
提取码：pdy1

Mysql

安装Mysql及相关组件，官网/网盘都可。
https://dev.mysql.com/downloads/

MySQL Installer for Windows

安装Mysql8.0，已安装可跳过此步，相关教程繁多，不再赘述。
https://dev.mysql.com/downloads/installer/

Connector/NET

版本兼容问题，这里用的是v6.3.9
https://downloads.mysql.com/archives/c-net/

MySQL for Visual Studio

https://dev.mysql.com/downloads/windows/visualstudio/

（插播反爬信息 ）博主CSDN地址：https://wzlodq.blog.csdn.net/

Visual Studio

Visual Studio2022暂不支持Mysql！！！
或者Mysql暂不支持Visual Studio2022！！！
直接劝退到2019

视图->服务器资源管理器

unity

MySql.Data.dll

unity2020已经内置了System.Data.dll和System.Drawing.dll，只需导入MySql.Data.dll即可。
该文件在前面Connector/NET安装目录下（也已上传网盘），如：
C:\Program Files (x86)\MySQL\MySQL Connector Net 6.3.9\Assemblies\v4.0

测试脚本

新建两个脚本测试连接：

SqlAccess.cs

using System;
using System.Data;
using MySql.Data.MySqlClient;
using UnityEngine;
using System.Text;

public class SqlAccess
{
	public static MySqlConnection dbConnection;
	public SqlAccess(string host, string port, string username, string pwd, string database)
	{
		//连接数据库
		try
		{
			string connectionString = string.Format("server = {0};port={1};database = {2};user = {3};password = {4};", host, port, database, username, pwd);
			Debug.Log(connectionString);
			dbConnection = new MySqlConnection(connectionString);
			dbConnection.Open();
			Debug.Log("连接成功！");
		}
		catch (Exception e)
		{
			throw new Exception("连接失败！" + e.Message.ToString());
		}
	}

	//关闭连接
	public void Close()
	{
		if (dbConnection != null)
		{
			dbConnection.Close();
			dbConnection.Dispose();
			dbConnection = null;
		}
	}

	//查询
	public DataSet SelectWhere(string tableName, string[] items, string[] col, string[] operation, string[] values)
	{

		if (col.Length != operation.Length || operation.Length != values.Length)
			throw new Exception("col.Length != operation.Length != values.Length");

		StringBuilder query = new StringBuilder();
		query.Append("SELECT ");
		query.Append(items[0]);

		for (int i = 1; i < items.Length; ++i)
		{
			query.Append(", ");
			query.Append(items[i]);
		}

		query.Append(" FROM ");
		query.Append(tableName);
		query.Append(" WHERE 1=1");

		for (int i = 0; i < col.Length; ++i)
		{
			query.Append(" AND ");
			query.Append(col[i]);
			query.Append(operation[i]);
			query.Append("'");
			query.Append(values[0]);
			query.Append("' ");
		}
		Debug.Log(query.ToString());
		return ExecuteQuery(query.ToString());
	}

	//执行sql语句
	public static DataSet ExecuteQuery(string sqlString)
	{
		if (dbConnection.State == ConnectionState.Open)
		{
			DataSet ds = new DataSet();
			try
			{
				MySqlDataAdapter da = new MySqlDataAdapter(sqlString, dbConnection);
				da.Fill(ds);
			}
			catch (Exception ee)
			{
				throw new Exception("SQL:" + sqlString + "/n" + ee.Message.ToString());
			}
			finally
			{
			}
			return ds;
		}
		return null;
	}
}

TestSql.cs

using System.Data;
using UnityEngine;

public class TestSql : MonoBehaviour
{
    public string host = "localhost";
    public string port = "3306";
    public string username = "root";
    public string pwd = "123456";
    public string database = "demo";
    void Start()
    {
        SqlAccess sql = new SqlAccess(host, port, username, pwd, database);

        string[] items = { "name" };//字段名
        string[] col = { };
        string[] op = { };
        string[] val = { };
        DataSet ds = sql.SelectWhere("test", items, col, op, val);//替换表名test

        if (ds != null)
        {
            DataTable table = ds.Tables[0];
            foreach (DataRow row in table.Rows)
            {
                string str = "";
                foreach (DataColumn column in table.Columns)
                    str += row[column] + " ";
                Debug.Log(str);
            }
        }
    }
}

测试结果

新建GameObject，将TestSql脚本绑定上去，记得修改TestSql密码数据库名字段名等。

运行测试：

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