c#

c#中的mysqlhelper怎么实现

小亿
220
2024-05-30 17:21:14
栏目: 云计算

在C#中使用MySQLHelper来操作数据库,通常需要安装MySQL.Data包,然后创建一个MySQLHelper类来封装常用的数据库操作方法,包括连接数据库、执行查询、执行非查询操作等。

以下是一个示例代码,展示了如何使用MySQLHelper类来连接MySQL数据库并执行查询操作:

using MySql.Data.MySqlClient;
using System;
using System.Data;

public class MySQLHelper
{
    private string connectionString;

    public MySQLHelper(string connectionString)
    {
        this.connectionString = connectionString;
    }

    public DataTable ExecuteQuery(string query)
    {
        DataTable dataTable = new DataTable();
        using (MySqlConnection connection = new MySqlConnection(connectionString))
        {
            connection.Open();
            using (MySqlCommand command = new MySqlCommand(query, connection))
            {
                using (MySqlDataAdapter adapter = new MySqlDataAdapter(command))
                {
                    adapter.Fill(dataTable);
                }
            }
        }
        return dataTable;
    }

    public int ExecuteNonQuery(string query)
    {
        int rowsAffected = 0;
        using (MySqlConnection connection = new MySqlConnection(connectionString))
        {
            connection.Open();
            using (MySqlCommand command = new MySqlCommand(query, connection))
            {
                rowsAffected = command.ExecuteNonQuery();
            }
        }
        return rowsAffected;
    }
}

// 使用MySQLHelper类
string connectionString = "Server=localhost;Database=mydatabase;Uid=username;Pwd=password;";
MySQLHelper mySQLHelper = new MySQLHelper(connectionString);

// 执行查询操作
string query = "SELECT * FROM mytable";
DataTable dataTable = mySQLHelper.ExecuteQuery(query);
foreach (DataRow row in dataTable.Rows)
{
    Console.WriteLine(row["column1"].ToString());
}

// 执行非查询操作
string insertQuery = "INSERT INTO mytable (column1, column2) VALUES ('value1', 'value2')";
int rowsAffected = mySQLHelper.ExecuteNonQuery(insertQuery);
Console.WriteLine("Rows affected: " + rowsAffected);

通过这样封装的MySQLHelper类,可以方便地在C#中连接MySQL数据库并执行各种数据库操作。在实际应用中,还可以根据需求进一步扩展MySQLHelper类,添加更多的数据库操作方法。

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