using System;
using System.Collections;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MySql.Data.MySqlClient;
using System.Configuration;
using System.Xml;
using System.Text.RegularExpressions;
namespace WindowsFormsApp1
{
public class DbHelperMySQL
{
///
/// 数据访问抽象基础类
/// Copyright (C) 2004-2008 By zzzili
///
//数据库连接字符串(web.config来配置)，可以动态更改connectionString支持多数据库.
///
/// 获取连接字符串
///
public static string connectionString = GetConnectionStringFromXml("./SystemConfig.xml");
//"server=10.164.1.169;port=3306;user=root;password=3687988; database=mesdb_nca;";//GetConnectionStringFromXml("./SystemConfig.xml");
public static string DbName = getDbName();//"mesdb_nca";
public static string getDbName() {
// 使用正则表达式提取数据库名称
string pattern = "database=([^;]+)";
Match match = Regex.Match(connectionString, pattern);
if (match.Success)
{
string databaseName = match.Groups[1].Value;
//Console.WriteLine(databaseName); // 输出: mesdb_nca
return databaseName;
}
System.Windows.Forms.MessageBox.Show("获取数据库失败");
return "";
}
public static string GetConnectionStringFromXml(string xmlFilePath)
{
try
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(xmlFilePath);
XmlNodeList connectionNodes = xmlDoc.SelectNodes("//config");
foreach (XmlNode configNode in connectionNodes)
{
string name = configNode.Attributes["name"].Value;
string ivalue = configNode.Attributes["ivalue"].Value;
if (name.Equals("ConnString")) return ivalue;
}
throw new Exception("No connection string found in the XML file.");
}
catch (Exception ex)
{
throw new Exception("Error reading XML file: " + ex.Message);
}
}
private MySqlConnection connection;
///
/// DbHelperMySQL无参数构造函数
///
private DbHelperMySQL(MySqlConnection connection)
{
this.connection = connection;
}
#region 公用方法
///
/// 获取表中最大的Id值
///
/// 列名
/// 表名
///
public static int GetMaxID(string FieldName, string TableName)
{
string strsql = "select max(" + FieldName + ")+1 from " + TableName;
object obj = GetSingle(strsql);
if (obj == null)
{
return 1;
}
else
{
return int.Parse(obj.ToString());
}
}
///
/// 返回查询是否存在
///
/// 要查询的Sql语句
///
public static bool Exists(string strSql)
{
object obj = GetSingle(strSql);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
///
/// 返回查询是否存在
///
/// 查询语句
/// 参数互列表
///
public static bool Exists(string strSql, params MySqlParameter[] cmdParms)
{
object obj = GetSingle(strSql, cmdParms);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
#endregion
#region 执行简单SQL语句
///
/// 返回新增加数据的Primary Key
///
/// 要执行的INSERT SQL语句
/// 表名
/// 字段名
///
public static int ExecuteSqlReturnLastRowId(string SQLString, string TableName, string FieldName)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
{
try
{
connection.Open();//int rows =
cmd.ExecuteNonQuery();
int a = GetMaxID(FieldName, TableName);
return a;
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
connection.Close();
throw new Exception(e.Message);
}
}
}
}
///
/// 执行SQL语句，返回影响的记录数
///
/// SQL语句
/// 影响的记录数
public static int ExecuteSql(string SQLString)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
{
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
connection.Close();
throw e;
}
}
}
}
///
/// 指定时间执行
///
/// 执行语句
/// 时间
///
public static int ExecuteSqlByTime(string SQLString, int Times)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
{
try
{
connection.Open();
cmd.CommandTimeout = Times;
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
connection.Close();
throw e;
}
}
}
}
///
/// 执行多条SQL语句，实现数据库事务。
///
/// 多条SQL语句
public static int ExecuteSqlTran(List SQLStringList)
{
using (MySqlConnection conn = new MySqlConnection(connectionString))
{
conn.Open();
MySqlCommand cmd = new MySqlCommand();
cmd.Connection = conn;
MySqlTransaction tx = conn.BeginTransaction();
cmd.Transaction = tx;
try
{
int count = 0;
for (int n = 0; n < SQLStringList.Count; n++)
{
string strsql = SQLStringList[n];
if (strsql.Trim().Length > 1)
{
cmd.CommandText = strsql;
count += cmd.ExecuteNonQuery();
}
}
tx.Commit();
return count;
}
catch
{
tx.Rollback();
return 0;
}
}
}
///
/// 执行带一个存储过程参数的的SQL语句。
///
/// SQL语句
/// 参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加
/// 影响的记录数
public static int ExecuteSql(string SQLString, string content)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlCommand cmd = new MySqlCommand(SQLString, connection);
MySql.Data.MySqlClient.MySqlParameter myParameter = new MySql.Data.MySqlClient.MySqlParameter("@content", SqlDbType.NText);
myParameter.Value = content;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
throw e;
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
///
/// 执行带一个存储过程参数的的SQL语句。
///
/// SQL语句
/// 参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加
/// 影响的记录数
public static object ExecuteSqlGet(string SQLString, string content)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlCommand cmd = new MySqlCommand(SQLString, connection);
MySql.Data.MySqlClient.MySqlParameter myParameter = new MySql.Data.MySqlClient.MySqlParameter("@content", SqlDbType.NText);
myParameter.Value = content;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
throw e;
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
///
/// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
///
/// SQL语句
/// 图像字节,数据库的字段类型为image的情况
/// 影响的记录数
public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlCommand cmd = new MySqlCommand(strSQL, connection);
MySql.Data.MySqlClient.MySqlParameter myParameter = new MySql.Data.MySqlClient.MySqlParameter("@fs", SqlDbType.Image);
myParameter.Value = fs;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
throw e;
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
//执行单条插入语句，并返回id，不需要返回id的用ExceuteNonQuery执行。
///
/// 执行插入语句并返回Id，不需返回Id的用其它执行方法
///
/// Sql语句
/// 此参数为Null时进行
///
public static int ExecuteInsert(string sql, MySqlParameter[] parameters)
{
//Debug.WriteLine(sql);
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlCommand cmd = new MySqlCommand(sql, connection);
try
{
connection.Open();
if (parameters != null) cmd.Parameters.AddRange(parameters);
cmd.ExecuteNonQuery();
cmd.CommandText = @"select LAST_INSERT_ID()";
//此方法估计也可直接用 select @@identity 获得，两值基本都是全局服务，使用时不能关闭Connection
int value = Int32.Parse(cmd.ExecuteScalar().ToString());
return value;
}
catch (Exception e)
{
throw e;
}
}
}
///
/// 执行一条计算查询结果语句，返回查询结果（object）。
///
/// 计算查询结果语句
/// 查询结果（object）
public static object GetSingle(string SQLString)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
{
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
connection.Close();
throw e;
}
}
}
}
///
/// 获取单一值
///
/// Sql语句
/// 时间
/// Object类型
public static object GetSingle(string SQLString, int Times)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
{
try
{
connection.Open();
cmd.CommandTimeout = Times;
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
connection.Close();
throw e;
}
}
}
}
///
/// 执行查询语句，返回MySqlDataReader ( 注意：调用该方法后，一定要对MySqlDataReader进行Close )
///
/// 查询语句
/// MySqlDataReader
public static MySqlDataReader ExecuteReader(string strSQL)
{
MySqlConnection connection = new MySqlConnection(connectionString);
MySqlCommand cmd = new MySqlCommand(strSQL, connection);
try
{
connection.Open();
MySqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return myReader;
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
throw e;
}
}
///
/// 执行查询语句，返回DataTable
///
/// 查询语句
/// DataTable
public static DataTable Query(string SQLString)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
DataSet ds = new DataSet();
DataTable dt = new DataTable();
try
{
connection.Open();
MySqlDataAdapter command = new MySqlDataAdapter(SQLString, connection);
command.Fill(ds, "ds");
dt = ds.Tables[0];
}
catch (MySqlException ex)
{
throw new Exception(ex.Message);
}
return dt;
}
}
///
/// 执行事务委托lambda语句，参数是DbHelperMySQL对象,通过执行对象的方法可以在事务的控制内
///
/// lambda语句
/// void
public static void ExecuteTransaction(Action transactionAction)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
connection.Open();
using (MySqlTransaction transaction = connection.BeginTransaction())
{
try
{
transactionAction.Invoke(new DbHelperMySQL(connection));
transaction.Commit();
}
catch (Exception ex)
{
transaction.Rollback();
throw new Exception("Transaction failed: " + ex.Message);
}
}
}
}
///
/// 执行SQL语句，返回影响的记录数
///
/// SQL语句
/// 影响的记录数
public static int ExecuteSql(MySqlConnection connection, string SQLString)
{
using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
{
int rows = cmd.ExecuteNonQuery();
return rows;
}
}
///
/// 执行SQL语句，返回影响的记录数
///
/// SQL语句
/// 影响的记录数
public int executeSql(string SQLString)
{
using (MySqlCommand cmd = new MySqlCommand(SQLString, this.connection))
{
int rows = cmd.ExecuteNonQuery();
return rows;
}
}
///
/// 执行语句，返回DataSet
///
/// Sql语句
/// 时间
///
public static DataSet Query(string SQLString, int Times)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
MySqlDataAdapter command = new MySqlDataAdapter(SQLString, connection);
command.SelectCommand.CommandTimeout = Times;
command.Fill(ds, "ds");
}
catch (MySql.Data.MySqlClient.MySqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
#endregion
#region 执行带参数的SQL语句
///
/// 执行SQL语句，返回影响的记录数
///
/// SQL语句
/// 准备好的参数列表
/// 影响的记录数
public static int ExecuteSql(string SQLString, params MySqlParameter[] cmdParms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
int rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
throw e;
}
}
}
}
///
/// 执行多条SQL语句，实现数据库事务。
///
/// SQL语句的哈希表（key为sql语句，value是该语句的MySqlParameter[]）
public static void ExecuteSqlTran(Hashtable SQLStringList)
{
using (MySqlConnection conn = new MySqlConnection(connectionString))
{
conn.Open();
using (MySqlTransaction trans = conn.BeginTransaction())
{
MySqlCommand cmd = new MySqlCommand();
try
{
//循环
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText = myDE.Key.ToString();
MySqlParameter[] cmdParms = (MySqlParameter[])myDE.Value;
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
}
trans.Commit();
}
catch
{
trans.Rollback();
throw;
}
}
}
}
///
/// 执行多条SQL语句，实现数据库事务。
///
/// SQL语句的哈希表（key为sql语句，value是该语句的MySqlParameter[]）
public static void ExecuteSqlTranWithIndentity(Hashtable SQLStringList)
{
using (MySqlConnection conn = new MySqlConnection(connectionString))
{
conn.Open();
using (MySqlTransaction trans = conn.BeginTransaction())
{
MySqlCommand cmd = new MySqlCommand();
try
{
int indentity = 0;
//循环
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText = myDE.Key.ToString();
MySqlParameter[] cmdParms = (MySqlParameter[])myDE.Value;
foreach (MySqlParameter q in cmdParms)
{
if (q.Direction == ParameterDirection.InputOutput)
{
q.Value = indentity;
}
}
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
foreach (MySqlParameter q in cmdParms)
{
if (q.Direction == ParameterDirection.Output)
{
indentity = Convert.ToInt32(q.Value);
}
}
cmd.Parameters.Clear();
}
trans.Commit();
}
catch
{
trans.Rollback();
throw;
}
}
}
}
///
/// 执行一条计算查询结果语句，返回查询结果（object）。
///
/// 计算查询结果语句
/// 准备好的参数列表
/// 查询结果（object）
public static object GetSingle(string SQLString, params MySqlParameter[] cmdParms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
object obj = cmd.ExecuteScalar();
cmd.Parameters.Clear();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
throw e;
}
}
}
}
///
/// 执行查询语句，返回MySqlDataReader ( 注意：调用该方法后，一定要对MySqlDataReader进行Close )
///
/// 查询语句
/// 参数列表
///
public static MySqlDataReader ExecuteReader(string SQLString, params MySqlParameter[] cmdParms)
{
MySqlConnection connection = new MySqlConnection(connectionString);
MySqlCommand cmd = new MySqlCommand();
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
MySqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return myReader;
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
throw e;
}
// finally
// {
// cmd.Dispose();
// connection.Close();
// }
}
///
/// 执行查询语句，返回DataSet
///
/// 查询语句
/// 参数列表
/// DataSet
public static DataSet Query(string SQLString, params MySqlParameter[] cmdParms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlCommand cmd = new MySqlCommand();
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.Fill(ds, "ds");
cmd.Parameters.Clear();
}
catch (MySql.Data.MySqlClient.MySqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
}
///
/// 准备命令语句
///
/// Command命令
/// Connection对象
/// 是否是事务
/// 语句
/// 参数列表
private static void PrepareCommand(MySqlCommand cmd, MySqlConnection conn, MySqlTransaction trans, string cmdText, MySqlParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = CommandType.Text;//cmdType;
if (cmdParms != null)
{
foreach (MySqlParameter parameter in cmdParms)
{
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
(parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
cmd.Parameters.Add(parameter);
}
}
}
#endregion
#region 参数转换
///
/// 准备MysqlCommad参数
///
/// MySqlCommand cmd对象
/// MySqlConnection conn对象
/// 数据库事务
/// text or StoredProcedure
/// 存储过程名
/// SqlCommand的参数
private static void PrepareMySqlCommand(MySql.Data.MySqlClient.MySqlCommand cmd, MySql.Data.MySqlClient.MySqlConnection conn, MySqlTransaction trans, CommandType cmdType, string cmdText, MySqlParameter[] cmdParms)
{
//连接状态是否打开
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
//Transact-SQL 事务
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
foreach (MySqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
///
/// 放回一个MakeMySqlParameter
///
/// 参数名字
/// 参数类型
/// 参数大小
/// 参数值
/// SQLiteParameter的值
public static MySqlParameter MakeMySqlParameter(string name, MySqlDbType type, int size, object value)
{
MySqlParameter parm = new MySqlParameter(name, type, size);
parm.Value = value;
return parm;
}
///
/// 创建MysqlParameter
///
/// 字段名称
/// 数据类型
/// 字段值
/// 返回类型为MySqlParameter
public static MySqlParameter MakeMySqlParameter(string name, MySqlDbType type, object value)
{
MySqlParameter parm = new MySqlParameter(name, type);
parm.Value = value;
return parm;
}
#endregion
#region C#调用Mysql的存储过程--自修改
#region 简单存储过程，返回结果中第一行第一列的值，要求第一行第一列有返回
///
/// 简单存储过程，返回结果中第一行第一列的值，要求第一行第一列有返回
///
/// 存储过程名
///
public static int ExecuteProc(string ProcName)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand(ProcName, connection))
{
try
{
cmd.CommandType = CommandType.StoredProcedure;
connection.Open();//int rows =
int result = int.Parse(cmd.ExecuteScalar().ToString());
return result;
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
connection.Close();
throw new Exception(e.Message);
}
}
}
}
#endregion
#region 执行带参数的存储过程
///
/// 执行带参数的存储过程
///
/// 存储过程名
/// 参数MySqlParameter[] cmdParms
///
public static string ExecuteProc(string ProcName, params MySqlParameter[] cmdParms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
using (MySqlCommand cmd = new MySqlCommand())
{
try
{
cmd.CommandType = CommandType.StoredProcedure;
//cmd.CommandText = ProcName;
PrepareMySqlCommand(cmd, connection, null, CommandType.StoredProcedure, ProcName, cmdParms);
// PrepareCommand(cmd, connection, null, ProcName, cmdParms);
//connection.Open();//int rows =
string result = cmd.ExecuteScalar().ToString();
return result;
}
catch (MySql.Data.MySqlClient.MySqlException e)
{
connection.Close();
throw new Exception(e.Message);
}
}
}
}
#endregion
#region 执行带参数的存储过程(返回DateSet)
///
/// 执行带参数的存储过程
///
/// 存储过程名
/// 参数MySqlParameter[] cmdParms
///
public static DataSet ExecuteProcDataset(string ProcName, params MySqlParameter[] cmdParms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlCommand cmd = new MySqlCommand();
PrepareMySqlCommand(cmd, connection, null, CommandType.StoredProcedure, ProcName, cmdParms);
using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.Fill(ds, "ds");
cmd.Parameters.Clear();
}
catch (MySql.Data.MySqlClient.MySqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
}
public static DataSet ExecuteProcDataset(string ProcName)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
MySqlCommand cmd = new MySqlCommand();
PrepareMySqlCommand(cmd, connection, null, CommandType.StoredProcedure, ProcName, null);
using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.Fill(ds, "ds");
cmd.Parameters.Clear();
}
catch (MySql.Data.MySqlClient.MySqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
}
#endregion
#endregion
}
}