版本兼容性问题走了很多弯路，非常流行。软件更新，但配套设施和支持往往跟不上，甚至与旧版本不兼容，大多数在线博客不再适用，所以写记录，我希望能帮助你。 网盘已上传相关安装包。

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

安装Mysql官网/网盘可以使用相关组件。 https://dev.mysql.com/downloads/

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

版本兼容性问题在这里使用v6.3.9 https://downloads.mysql.com/archives/c-net/

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

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

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

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

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);
            }
        }
    }
}

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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