添加项目文件。
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liming 蔡
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using Dapper;
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using System;
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using System.Collections.Generic;
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using System.Configuration;
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using System.Data;
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using MySql.Data.MySqlClient;
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using System.Linq;
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namespace JY.DAL
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{
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public class MySqlHelper<T> where T : class
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{
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/// <summary>
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/// 数据库连接字符串
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/// </summary>
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private static readonly string connectionString = ConfigurationManager.ConnectionStrings["MysqlConn"].ConnectionString;
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/// <summary>
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/// 查询列表
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/// </summary>
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/// <param name="sql">查询的sql</param>
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/// <param name="param">替换参数</param>
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/// <returns></returns>
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public static List<T> Query(string sql, object param = null)
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{
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using (MySqlConnection con = new MySqlConnection(connectionString))
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{
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return con.Query<T>(sql, param).ToList();
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}
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}
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/// <summary>
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/// 查询第一个数据
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="param"></param>
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/// <returns></returns>
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public static T QueryFirst(string sql, object param = null)
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{
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using (MySqlConnection con = new MySqlConnection(connectionString))
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{
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return con.QueryFirst<T>(sql, param);
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}
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}
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/// <summary>
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/// 查询第一个数据没有返回默认值
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="param"></param>
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/// <returns></returns>
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public static T QueryFirstOrDefault(string sql, object param = null)
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{
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using (MySqlConnection con = new MySqlConnection(connectionString))
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{
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return con.QueryFirstOrDefault<T>(sql, param);
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}
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}
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/// <summary>
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/// 查询单条数据
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="param"></param>
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/// <returns></returns>
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public static T QuerySingle(string sql, object param = null)
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{
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using (MySqlConnection con = new MySqlConnection(connectionString))
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{
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return con.QuerySingle<T>(sql, param);
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}
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}
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/// <summary>
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/// 查询单条数据没有返回默认值
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="param"></param>
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/// <returns></returns>
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public static T QuerySingleOrDefault(string sql, object param = null)
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{
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using (MySqlConnection con = new MySqlConnection(connectionString))
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{
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return con.QuerySingleOrDefault<T>(sql, param);
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}
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}
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/// <summary>
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/// 增删改
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="param"></param>
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/// <returns>Number of rows affected</returns>
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public static int Execute(string sql, object param = null)
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{
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using (MySqlConnection con = new MySqlConnection(connectionString))
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{
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return con.Execute(sql, param);
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}
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}
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/// <summary>
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/// Reader获取数据
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="param"></param>
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/// <returns></returns>
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public static IDataReader ExecuteReader(string sql, object param)
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{
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using (MySqlConnection con = new MySqlConnection(connectionString))
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{
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return con.ExecuteReader(sql, param);
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}
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}
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/// <summary>
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/// 获取数据返回DataTable
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="param"></param>
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/// <returns></returns>
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public static DataTable QueryTable(string sql, object param = null)
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{
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using (MySqlConnection con = new MySqlConnection(connectionString))
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{
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DataTable table = new DataTable();
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var reader = con.ExecuteReader(sql, param);
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table.Load(reader);
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return table;
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}
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}
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/// <summary>
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/// Scalar获取数据
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="param"></param>
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/// <returns></returns>
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public static object ExecuteScalar(string sql, object param = null)
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{
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using (MySqlConnection con = new MySqlConnection(connectionString))
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{
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return con.ExecuteScalar(sql, param);
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}
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}
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/// <summary>
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/// Scalar获取数据
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="param"></param>
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/// <returns></returns>
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public static T ExecuteScalarForT(string sql, object param = null)
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{
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using (MySqlConnection con = new MySqlConnection(connectionString))
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{
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return con.ExecuteScalar<T>(sql, param);
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}
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}
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/// <summary>
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/// 带参数的存储过程
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/// </summary>
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/// <param name="sql"></param>
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/// <param name="param"></param>
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/// <returns></returns>
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public static List<T> ExecutePro(string proc, object param = null)
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{
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using (MySqlConnection con = new MySqlConnection(connectionString))
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{
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List<T> list = con.Query<T>(proc,
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param,
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null,
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true,
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null,
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CommandType.StoredProcedure).ToList();
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return list;
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}
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}
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/// <summary>
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/// 批量插入T数据，返回影响行数
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/// </summary>
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/// <param name="list">对象集合</param>
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/// <returns>影响行数</returns>
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public static int Insert(string strsql, List<T> list)
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{
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using (IDbConnection connection = new MySqlConnection(connectionString))
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{
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//return connection.Execute("insert into Person(Name,Remark) values(@Name,@Remark)", list);
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return connection.Execute(strsql, list);
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}
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}
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/// <summary>
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/// 事务1 - 全SQL
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/// </summary>
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/// <param name="sqlarr">多条SQL</param>
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/// <param name="param">param</param>
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/// <returns></returns>
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public static int ExecuteTransaction(string[] sqlarr)
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{
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using (MySqlConnection con = new MySqlConnection(connectionString))
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{
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con.Open();
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using (var transaction = con.BeginTransaction())
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{
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try
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{
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int result = 0;
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foreach (var sql in sqlarr)
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{
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result += con.Execute(sql, null, transaction);
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}
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transaction.Commit();
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return result;
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}
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catch (Exception ex)
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{
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transaction.Rollback();
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throw ex;
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}
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finally
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{
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con.Close();
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}
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}
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}
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}
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/// <summary>
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/// 事务2 - 声明参数
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///demo:
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///dic.Add("Insert into Users values (@UserName, @Email, @Address)",
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/// new { UserName = "jack", Email = "380234234@qq.com", Address = "上海" });
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/// </summary>
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/// <param name="Key">多条SQL</param>
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/// <param name="Value">param</param>
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/// <returns></returns>
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public static int ExecuteTransaction(Dictionary<string, object> dic)
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{
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using (MySqlConnection con = new MySqlConnection(connectionString))
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{
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con.Open();
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using (var transaction = con.BeginTransaction())
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{
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try
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{
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int result = 0;
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foreach (var sql in dic)
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{
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result += con.Execute(sql.Key, sql.Value, transaction);
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}
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transaction.Commit();
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return result;
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}
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catch (Exception ex)
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{
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transaction.Rollback();
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throw ex;
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}
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finally
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{
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con.Close();
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}
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}
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}
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}
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}
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}
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