C# 在dataview可以直接增删改查mysql数据库

码猩2024-12-12 7:02

C# 在dataview可以直接增删改查mysql数据库

首先，确保你的项目中已经安装了MySql.Data。你可以通过NuGet包管理器安装它：

python 复制代码

Install-Package MySql.Data -Version 8.0.28

csharp 复制代码

using System;
using System.Data;
using MySql.Data.MySqlClient;
 
public class MySQLDataAccess
{
    private string connectionString = "server=localhost;user=root;database=mydb;port=3306;password=mypassword";
 
    public void Insert(string query)
    {
        using (MySqlConnection conn = new MySqlConnection(connectionString))
        {
            conn.Open();
            using (MySqlCommand cmd = new MySqlCommand(query, conn))
            {
                cmd.ExecuteNonQuery();
            }
        }
    }
 
    public DataTable Select(string query)
    {
        DataTable dataTable = new DataTable();
        using (MySqlConnection conn = new MySqlConnection(connectionString))
        {
            using (MySqlDataAdapter adapter = new MySqlDataAdapter(query, conn))
            {
                conn.Open();
                adapter.Fill(dataTable);
            }
        }
        return dataTable;
    }
 
    public void Update(string query)
    {
        using (MySqlConnection conn = new MySqlConnection(connectionString))
        {
            conn.Open();
            using (MySqlCommand cmd = new MySqlCommand(query, conn))
            {
                cmd.ExecuteNonQuery();
            }
        }
    }
 
    public void Delete(string query)
    {
        using (MySqlConnection conn = new MySqlConnection(connectionString))
        {
            conn.Open();
            using (MySqlCommand cmd = new MySqlCommand(query, conn))
            {
                cmd.ExecuteNonQuery();
            }
        }
    }
}
 
// 使用示例
MySQLDataAccess db = new MySQLDataAccess();
 
// 插入
string insertQuery = "INSERT INTO mytable (column1, column2) VALUES ('value1', 'value2')";
db.Insert(insertQuery);
 
// 查询
string selectQuery = "SELECT * FROM mytable";
DataTable table = db.Select(selectQuery);
 
// 更新
string updateQuery = "UPDATE mytable SET column1 = 'newvalue' WHERE id = 1";
db.Update(updateQuery);
 
// 删除
string deleteQuery = "DELETE FROM mytable WHERE id = 1";
db.Delete(deleteQuery);