.net 连接Mysql封装

使用Visual Studio与MySQL连接驱动实现数据库操作

最新推荐文章于 2022-04-05 21:16:56 发布

iteye_6233

最新推荐文章于 2022-04-05 21:16:56 发布

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文章标签：数据库

本文介绍如何在Visual Studio中通过下载并安装MySQL-Connector.NET驱动来连接MySQL数据库，并提供了封装好的数据库操作类，包括获取数据库连接、执行SQL查询、执行SQL语句等常用功能。

微软的visual studio没有自带连接Mysql的驱动，要去网上下载一个mysql-connector-net-6.4.3驱动，然后安装就可以使用。

下面是我封装好的连接数据库的类，直接调用即可。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using MySql.Data.MySqlClient;

namespace DAL
{
public class GetConnection
{
private static MySqlConnection _connection;
/// <summary>
/// 获取数据库连接桥
/// </summary>
private static MySqlConnection Connection
{
get
{
//string connectionString = ConfigurationManager.AppSettings["ConnectionString"];
string connectionString = "server=localhost;user id=root; password=root; database=system; pooling=false";
//server=222.222.222.222;port=3306;uid=user;pwd=;database=basename;远程连接的

//string connectionString = "Data Source=202.192.72.22;Initial Catalog=wwj;Persist Security Info=True;User ID=wwj;Password=wwj123";
if (_connection == null)
{
_connection = new MySqlConnection(connectionString);
_connection.Open();
}
if (_connection.State == ConnectionState.Closed)
{
_connection.Open();
}
if (_connection.State == ConnectionState.Broken)
{
_connection.Close();
_connection.Open();
}
return GetConnection._connection;
}

}
/// <summary>
/// 获取表数据
/// </summary>
/// <param name="sql"></param>
/// <returns></returns>
public static MySqlDataReader GetDataRead(string sql)
{
MySqlCommand command = new MySqlCommand(sql, Connection);
MySqlDataReader read = command.ExecuteReader();

return read;
}
public static int NoSelect(string sql)
{
MySqlCommand command = new MySqlCommand(sql, Connection);
int row = command.ExecuteNonQuery();
return row;
}
public static DataTable GetDataTable(string sql)
{
MySqlCommand command = new MySqlCommand(sql, Connection);

DataTable dt = new DataTable();

MySqlDataAdapter sda = new MySqlDataAdapter(command);
sda.Fill(dt);
return dt;
}
/// <summary>
/// 执行sql语句，返回一行一列。。
/// </summary>
/// <param name="sql">SQL语句</param>
/// <returns></returns>
public static string GetScalar(string sql)
{
MySqlCommand command = new MySqlCommand(sql, Connection);
return command.ExecuteScalar().ToString();
}

}
}

比如说你想执行删除的，你可以调用GetConnection.NoSelect("delete from UserInfo where Id=1");读数据库的某一张表，可以调用GetConnection.GetDataTable("select * from UserInfo");调用都很方便。