Asp .Net Core系列：基于MySQL的DBHelper帮助类和SQL Server的DBHelper帮助类

MySQLDBHelper

app.config中添加配置

	<connectionStrings><add name="MySqlConn" connectionString="server=localhost;port=3306;user=root;password=123456;database=db1;SslMode=none"/></connectionStrings>

MySQLDBHelper

using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;namespace Common
{/// <summary>/// 数据库操作类/// </summary>public class MySQLDBHelper{public readonly static string MySqlConn = ConfigurationManager.ConnectionStrings["MySqlConn"].ConnectionString.ToString();/// <summary>/// 执行增、删、改的方法：ExecuteNonQuery,返回true,false/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public static bool ExecuteNonQuery(string sql, MySqlParameter[] pms){using (MySqlConnection conn = new MySqlConnection(MySqlConn)){conn.Open();using (MySqlTransaction transaction = conn.BeginTransaction()){using (MySqlCommand cmd = new MySqlCommand(sql, conn)){if (pms != null && pms.Length > 0){cmd.Parameters.AddRange(pms);}int rows = cmd.ExecuteNonQuery();transaction.Commit();return rows > 0;}}}}/// <summary>///  执行增、删、改的方法：ExecuteNonQuery,返回true,false/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public static bool ExecuteNonQuery(string sql, Dictionary<string, object> pms){MySqlParameter[] parameters = null;if (pms != null && pms.Count > 0){parameters = DictionaryToMySqlParameters(pms).ToArray();}return ExecuteNonQuery(sql, parameters);}/// <summary>///  执行增、删、改的方法：ExecuteNonQuery,返回true,false/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public static bool ExecuteNonQuery(string sql){return ExecuteNonQuery(sql, new MySqlParameter[] { });}/// <summary>/// 将查出的数据装到实体里面，返回一个List/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public static List<T> ExecuteQuery<T>(string sql, MySqlParameter[] pms) where T : new(){using (var connection = new MySqlConnection(MySqlConn)){connection.Open();using (var command = new MySqlCommand(sql, connection)){if (pms != null && pms.Length > 0){command.Parameters.AddRange(pms);}using (var reader = command.ExecuteReader()){List<T> tList = new List<T>();while (reader.Read()) // 遍历结果集中的每一行数据  {var t = ConvertToModel<T>(reader);tList.Add(t);}return tList;}}}}/// <summary>/// 将查出的数据装到实体里面，返回一个List/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public static List<T> ExecuteQuery<T>(string sql, Dictionary<string, object> pms) where T : new(){MySqlParameter[] parameters = null;if (pms != null){parameters = DictionaryToMySqlParameters(pms).ToArray();}return ExecuteQuery<T>(sql, parameters);}/// <summary>/// 将查出的数据装到实体里面，返回一个List/// </summary>/// <param name="sql"></param>/// <returns></returns>public static List<T> ExecuteQuery<T>(string sql) where T : new(){return ExecuteQuery<T>(sql, new MySqlParameter[] { });}/// <summary>/// 将查出的数据装到实体里面，返回一个实体/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public static T ExecuteQueryOne<T>(string sql, MySqlParameter[] pms) where T : new(){using (var connection = new MySqlConnection(MySqlConn)){connection.Open();using (var command = new MySqlCommand(sql, connection)){if (pms != null && pms.Length > 0){command.Parameters.AddRange(pms);}using (var reader = command.ExecuteReader()){while (reader.Read()) // 遍历结果集中的每一行数据  {var t = ConvertToModel<T>(reader);return t;}return default(T);}}}}/// <summary>/// 将查出的数据装到实体里面，返回一个实体/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public static T ExecuteQueryOne<T>(string sql, Dictionary<string, object> pms) where T : new(){MySqlParameter[] parameters = null;if (pms != null && parameters.Length > 0){parameters = DictionaryToMySqlParameters(pms).ToArray();}return ExecuteQueryOne<T>(sql, parameters);}/// <summary>/// 将查出的数据装到实体里面，返回一个实体/// </summary>/// <typeparam name="T"></typeparam>/// <param name="sql"></param>/// <returns></returns>public static T ExecuteQueryOne<T>(string sql) where T : new(){return ExecuteQueryOne<T>(sql, new MySqlParameter[] { });}/// <summary>/// 将查出的数据装到table里，返回一个DataTable/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public DataTable ExecuteQueryDataTable(string sql, MySqlParameter[] pms = null){DataTable dt = new DataTable();using (MySqlDataAdapter adapter = new MySqlDataAdapter(sql, MySqlConn)){if (pms != null){adapter.SelectCommand.Parameters.AddRange(pms);}adapter.Fill(dt);}return dt;}/// <summary>/// 将查出的数据装到table里，返回一个DataTable/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public DataTable ExecuteQueryDataTable(string sql, Dictionary<string, object> pms){MySqlParameter[] parameters = null;if (pms != null){parameters = DictionaryToMySqlParameters(pms).ToArray();}return ExecuteQueryDataTable(sql, parameters);}/// <summary>/// 将查出的数据装到table里，返回一个DataTable/// </summary>/// <param name="sql"></param>/// <returns></returns>public DataTable ExecuteQueryDataTable(string sql){MySqlParameter[] parameters = null;return ExecuteQueryDataTable(sql, parameters);}/// <summary>/// 字典转MySqlParameters/// </summary>/// <param name="parameters"></param>/// <returns></returns>public static List<MySqlParameter> DictionaryToMySqlParameters(Dictionary<string, object> parameters){List<MySqlParameter> MySqlParameters = new List<MySqlParameter>();foreach (var kvp in parameters){string parameterName = kvp.Key;object parameterValue = kvp.Value;// 创建 MySqlParameter 对象  MySqlParameter MySqlParameter = new MySqlParameter(parameterName, parameterValue);MySqlParameters.Add(MySqlParameter);}return MySqlParameters;}/// <summary>/// 按列名转换(单条使用比较方便)/// </summary>/// <param name="reader"></param>/// <returns></returns>public static T ConvertToModel<T>(MySqlDataReader reader) where T : new(){T t = new T();PropertyInfo[] propertys = t.GetType().GetProperties();List<string> drColumnNames = new List<string>();for (int i = 0; i < reader.FieldCount; i++){drColumnNames.Add(reader.GetName(i));}foreach (PropertyInfo pi in propertys){if (drColumnNames.Contains(pi.Name)){if (!pi.CanWrite){continue;}var value = reader[pi.Name];if (value != DBNull.Value){pi.SetValue(t, value, null);}}}return t;}}
}

MSSQLDBHelper

app.config中添加配置

	<connectionStrings><add name="SqlConn" connectionString="Server=127.0.0.1;Database=db1;UserId=sa;Password=123456;"/></connectionStrings>

MSSQLDBHelper

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;namespace Common
{/// <summary>/// 数据库帮助类/// </summary>public class MSSQLDBHelper{public readonly static string SqlConn = ConfigurationManager.ConnectionStrings["SqlConn"].ConnectionString.ToString();/// <summary>/// 执行增、删、改的方法：ExecuteNonQuery,返回true,false/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public static bool ExecuteNonQuery(string sql, SqlParameter[] pms){using (SqlConnection conn = new SqlConnection(SqlConn)){conn.Open();using (SqlTransaction transaction = conn.BeginTransaction()){using (SqlCommand cmd = new SqlCommand(sql, conn)){if (pms != null && pms.Length > 0){cmd.Parameters.AddRange(pms);}int rows = cmd.ExecuteNonQuery();transaction.Commit();return rows > 0;}}}}/// <summary>///  执行增、删、改的方法：ExecuteNonQuery,返回true,false/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public static bool ExecuteNonQuery(string sql, Dictionary<string, object> pms){SqlParameter[] parameters = null;if (pms != null && pms.Count > 0){parameters = DictionaryToSqlParameters(pms).ToArray();}return ExecuteNonQuery(sql, parameters);}/// <summary>///  执行增、删、改的方法：ExecuteNonQuery,返回true,false/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public static bool ExecuteNonQuery(string sql){return ExecuteNonQuery(sql, new SqlParameter[] { });}/// <summary>/// 将查出的数据装到实体里面，返回一个List/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public static List<T> ExecuteQuery<T>(string sql, SqlParameter[] pms) where T : new(){using (var connection = new SqlConnection(SqlConn)){connection.Open();using (var command = new SqlCommand(sql, connection)){if (pms != null && pms.Length > 0){command.Parameters.AddRange(pms);}using (var reader = command.ExecuteReader()){List<T> tList = new List<T>();while (reader.Read()) // 遍历结果集中的每一行数据  {var t = ConvertToModel<T>(reader);tList.Add(t);}return tList;}}}}/// <summary>/// 将查出的数据装到实体里面，返回一个List/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public static List<T> ExecuteQuery<T>(string sql, Dictionary<string, object> pms) where T : new(){SqlParameter[] parameters = null;if (pms != null){parameters = DictionaryToSqlParameters(pms).ToArray();}return ExecuteQuery<T>(sql, parameters);}/// <summary>/// 将查出的数据装到实体里面，返回一个List/// </summary>/// <param name="sql"></param>/// <returns></returns>public static List<T> ExecuteQuery<T>(string sql) where T : new(){return ExecuteQuery<T>(sql, new SqlParameter[] { });}/// <summary>/// 将查出的数据装到实体里面，返回一个实体/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public static T ExecuteQueryOne<T>(string sql, SqlParameter[] pms) where T : new(){using (var connection = new SqlConnection(SqlConn)){connection.Open();using (var command = new SqlCommand(sql, connection)){if (pms != null && pms.Length > 0){command.Parameters.AddRange(pms);}using (var reader = command.ExecuteReader()){while (reader.Read()) // 遍历结果集中的每一行数据  {var t = ConvertToModel<T>(reader);return t;}return default(T);}}}}/// <summary>/// 将查出的数据装到实体里面，返回一个实体/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public static T ExecuteQueryOne<T>(string sql, Dictionary<string, object> pms) where T : new(){SqlParameter[] parameters = null;if (pms != null && parameters.Length > 0){parameters = DictionaryToSqlParameters(pms).ToArray();}return ExecuteQueryOne<T>(sql, parameters);}/// <summary>/// 将查出的数据装到实体里面，返回一个实体/// </summary>/// <typeparam name="T"></typeparam>/// <param name="sql"></param>/// <returns></returns>public static T ExecuteQueryOne<T>(string sql) where T : new(){return ExecuteQueryOne<T>(sql, new SqlParameter[] { });}/// <summary>/// 将查出的数据装到table里，返回一个DataTable/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public DataTable ExecuteQueryDataTable(string sql, SqlParameter[] pms = null){DataTable dt = new DataTable();using (SqlDataAdapter adapter = new SqlDataAdapter(sql, SqlConn)){if (pms != null){adapter.SelectCommand.Parameters.AddRange(pms);}adapter.Fill(dt);}return dt;}/// <summary>/// 将查出的数据装到table里，返回一个DataTable/// </summary>/// <param name="sql"></param>/// <param name="pms"></param>/// <returns></returns>public DataTable ExecuteQueryDataTable(string sql, Dictionary<string, object> pms){SqlParameter[] parameters = null;if (pms != null){parameters = DictionaryToSqlParameters(pms).ToArray();}return ExecuteQueryDataTable(sql, parameters);}/// <summary>/// 将查出的数据装到table里，返回一个DataTable/// </summary>/// <param name="sql"></param>/// <returns></returns>public DataTable ExecuteQueryDataTable(string sql){SqlParameter[] parameters = null;return ExecuteQueryDataTable(sql, parameters);}/// <summary>/// 字典转SqlParameters/// </summary>/// <param name="parameters"></param>/// <returns></returns>public static List<SqlParameter> DictionaryToSqlParameters(Dictionary<string, object> parameters){List<SqlParameter> SqlParameters = new List<SqlParameter>();foreach (var kvp in parameters){string parameterName = kvp.Key;object parameterValue = kvp.Value;// 创建 SqlParameter 对象  SqlParameter SqlParameter = new SqlParameter(parameterName, parameterValue);SqlParameters.Add(SqlParameter);}return SqlParameters;}/// <summary>/// 按列名转换(单条使用比较方便)/// </summary>/// <param name="reader"></param>/// <returns></returns>public static T ConvertToModel<T>(SqlDataReader reader) where T : new(){T t = new T();PropertyInfo[] propertys = t.GetType().GetProperties();List<string> drColumnNames = new List<string>();for (int i = 0; i < reader.FieldCount; i++){drColumnNames.Add(reader.GetName(i));}foreach (PropertyInfo pi in propertys){if (drColumnNames.Contains(pi.Name)){if (!pi.CanWrite){continue;}var value = reader[pi.Name];if (value != DBNull.Value){pi.SetValue(t, value, null);}}}return t;}}
}