- /**
- * 作者:牛腩
- * 创建时间:2010年3月7日17时35分
- * 类说明:对MYSQL数据库的操作类
- */
- using System;
- using System.Data;
- using MySql.Data.MySqlClient;
- namespace Niunan.BYLW.Utility
- {
- /// <summary>对MYSQL数据库的操作类
- ///
- /// </summary>
- public class MYSQLHelper
- {
- private MySqlConnection conn = null;
- private MySqlCommand cmd = null;
- private MySqlDataReader sdr = null;
- public MYSQLHelper()
- {
- //string connStr = WebConfigurationManager.ConnectionStrings["connStr"].ToString();
- string connStr = "server=localhost;database=test;uid=root;pwd=123456;charset=utf8";
- conn = new MySqlConnection(connStr);
- }
- /// <summary>创建Command对象
- ///
- /// </summary>
- /// <param name="sql">SQL语句</param>
- public void CreateCommand(string sql)
- {
- conn.Open();
- cmd = new MySqlCommand(sql, conn);
- }
- /// <summary>添加参数
- ///
- /// </summary>
- /// <param name="paramName">参数名称</param>
- /// <param name="value">值</param>
- public void AddParameter(string paramName, object value)
- {
- cmd.Parameters.Add(new MySqlParameter(paramName, value));
- }
- /// <summary>执行不带参数的增删改SQL语句
- ///
- /// </summary>
- /// <param name="cmdText">增删改SQL语句</param>
- /// <param name="ct">命令类型</param>
- /// <returns></returns>
- public bool ExecuteNonQuery()
- {
- int res;
- try
- {
- res = cmd.ExecuteNonQuery();
- if (res > 0)
- {
- return true;
- }
- }
- catch (Exception ex)
- {
- throw ex;
- }
- finally
- {
- if (conn.State == ConnectionState.Open)
- {
- conn.Close();
- }
- }
- return false;
- }
- /// <summary>执行查询SQL语句
- ///
- /// </summary>
- /// <param name="cmdText">查询SQL语句</param>
- /// <returns></returns>
- public DataTable ExecuteQuery()
- {
- DataTable dt = new DataTable();
- using (sdr = cmd.ExecuteReader(CommandBehavior.CloseConnection))
- {
- dt.Load(sdr);
- }
- return dt;
- }
- /// <summary>返回查询SQL语句查询出的结果的第一行第一列的值
- ///
- /// </summary>
- /// <returns></returns>
- public string ExecuteScalar()
- {
- string res = "";
- try
- {
- object obj = cmd.ExecuteScalar();
- if (obj != null)
- {
- res = obj.ToString();
- }
- }
- catch (Exception ex)
- {
- throw ex;
- }
- finally
- {
- if (conn.State == ConnectionState.Open)
- {
- conn.Close();
- }
- }
- return res;
- }
- }
- }
都是把那个SQLITEHelper的操作类搬过来的,改了MySqlConnection等变量名,对MYSQL来说经常会出现中文乱码,经实验,解决方法:
① 用PHPMYADMIN建立MYSQL数据库的时候记得选择UTF-8的编码
② 在上面的数据库操作类中的连接字符串中记得加上charset=utf8
这样用上面的操作类来插入中文就不会出现乱码了。
自己封装的ASP.NET的MYSQL的数据库操作类
时间: 2024-10-12 16:41:37