69 lines
2.2 KiB
C#
69 lines
2.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using MySqlConnector;
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namespace BarCode.Web.Repositories
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{
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public class MySqlDataAccess
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{
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private readonly string _connectionString;
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public MySqlDataAccess(string connectionString)
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{
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_connectionString = connectionString;
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}
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/// <summary>
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/// 执行查询并返回 DataTable
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/// </summary>
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/// <param name="query">SQL 查询语句</param>
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/// <returns>查询结果的 DataTable</returns>
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public DataTable ExecuteQuery(string query)
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{
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using (MySqlConnection connection = new MySqlConnection(_connectionString))
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{
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try
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{
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connection.Open();
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MySqlCommand command = new MySqlCommand(query, connection);
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MySqlDataAdapter adapter = new MySqlDataAdapter(command);
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DataTable dataTable = new DataTable();
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adapter.Fill(dataTable);
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return dataTable;
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}
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catch (Exception ex)
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{
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Console.WriteLine($"查询出错: {ex.Message}");
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return null;
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}
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}
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}
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/// <summary>
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/// 执行非查询操作（如 INSERT、UPDATE、DELETE）
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/// </summary>
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/// <param name="query">SQL 非查询语句</param>
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/// <returns>受影响的行数</returns>
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public int ExecuteNonQuery(string query)
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{
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using (MySqlConnection connection = new MySqlConnection(_connectionString))
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{
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try
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{
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connection.Open();
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MySqlCommand command = new MySqlCommand(query, connection);
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return command.ExecuteNonQuery();
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}
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catch (Exception ex)
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{
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Console.WriteLine($"执行非查询操作出错: {ex.Message}");
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return -1;
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}
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}
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}
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}
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}
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