SQLSUGAR
http://www.codeisbug.com/Doc/8/1159
附带mysql工具类，最优使用上面sqlsugar
using System; using System.Collections; using System.Collections.Specialized; using System.Data; using MySql.Data.MySqlClient; using System.Configuration; using System.Data.Common; using System.Collections.Generic; using System.Data.SqlClient; using System.Text; namespace PluginManager.PluginManagerCore { /// <summary> /// 数据访问抽象基础类 /// </summary> public abstract class DbHelperMySQL { //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. public static string connectionString = "Server=172.18.131.52;Database=zabbix; User=root;Password=123456;Use Procedure Bodies=false;Charset=utf8;Allow Zero Datetime=True; Pooling=True; Max Pool Size=50;"; public DbHelperMySQL() { } public enum EffentNextType { /// <summary> /// 对其他语句无任何影响 /// </summary> None, /// <summary> /// 当前语句必须为"select count(1) from .."格式，如果存在则继续执行，不存在回滚事务 /// </summary> WhenHaveContine, /// <summary> /// 当前语句必须为"select count(1) from .."格式，如果不存在则继续执行，存在回滚事务 /// </summary> WhenNoHaveContine, /// <summary> /// 当前语句影响到的行数必须大于0，否则回滚事务 /// </summary> ExcuteEffectRows, /// <summary> /// 引发事件-当前语句必须为"select count(1) from .."格式，如果不存在则继续执行，存在回滚事务 /// </summary> SolicitationEvent } public class CommandInfo { public object ShareObject = null; public object OriginalData = null; event EventHandler _solicitationEvent; public event EventHandler SolicitationEvent { add { _solicitationEvent += value; } remove { _solicitationEvent -= value; } } public void OnSolicitationEvent() { if (_solicitationEvent != null) { _solicitationEvent(this, new EventArgs()); } } public string CommandText; public System.Data.Common.DbParameter[] Parameters; public EffentNextType EffentNextType = EffentNextType.None; public CommandInfo() { } public CommandInfo(string sqlText, SqlParameter[] para) { this.CommandText = sqlText; this.Parameters = para; } public CommandInfo(string sqlText, SqlParameter[] para, EffentNextType type) { this.CommandText = sqlText; this.Parameters = para; this.EffentNextType = type; } } /// <summary> /// 得到最大值 /// </summary> /// <param name="FieldName"></param> /// <param name="TableName"></param> /// <returns></returns> 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()); } } /// <summary> /// 是否存在 /// </summary> /// <param name="strSql"></param> /// <returns></returns> 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; } } /// <summary> /// 是否存在（基于MySqlParameter） /// </summary> /// <param name="strSql"></param> /// <param name="cmdParms"></param> /// <returns></returns> 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; } } /// <summary> /// 执行SQL语句，返回影响的记录数 /// </summary> /// <param name="SQLString">SQL语句</param> /// <returns>影响的记录数</returns> 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; } } } } 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; } } } } /// <summary> /// 执行MySql和Oracle滴混合事务 /// </summary> /// <param name="list">SQL命令行列表</param> /// <param name="oracleCmdSqlList">Oracle命令行列表</param> /// <returns>执行结果 0-由于SQL造成事务失败 -1 由于Oracle造成事务失败 1-整体事务执行成功</returns> //public static int ExecuteSqlTran(List<CommandInfo> list, List<CommandInfo> oracleCmdSqlList) //{ // using (MySqlConnection conn = new MySqlConnection(connectionString)) // { // conn.Open(); // MySqlCommand cmd = new MySqlCommand(); // cmd.Connection = conn; // MySqlTransaction tx = conn.BeginTransaction(); // cmd.Transaction = tx; // try // { // foreach (CommandInfo myDE in list) // { // string cmdText = myDE.CommandText; // MySqlParameter[] cmdParms = (MySqlParameter[])myDE.Parameters; // PrepareCommand(cmd, conn, tx, cmdText, cmdParms); // if (myDE.EffentNextType == EffentNextType.SolicitationEvent) // { // if (myDE.CommandText.ToLower().IndexOf("count(") == -1) // { // tx.Rollback(); // throw new Exception("违背要求" + myDE.CommandText + "必须符合select count(..的格式"); // //return 0; // } // object obj = cmd.ExecuteScalar(); // bool isHave = false; // if (obj == null && obj == DBNull.Value) // { // isHave = false; // } // isHave = Convert.ToInt32(obj) > 0; // if (isHave) // { // //引发事件 // myDE.OnSolicitationEvent(); // } // } // if (myDE.EffentNextType == EffentNextType.WhenHaveContine || myDE.EffentNextType == EffentNextType.WhenNoHaveContine) // { // if (myDE.CommandText.ToLower().IndexOf("count(") == -1) // { // tx.Rollback(); // throw new Exception("SQL:违背要求" + myDE.CommandText + "必须符合select count(..的格式"); // //return 0; // } // object obj = cmd.ExecuteScalar(); // bool isHave = false; // if (obj == null && obj == DBNull.Value) // { // isHave = false; // } // isHave = Convert.ToInt32(obj) > 0; // if (myDE.EffentNextType == EffentNextType.WhenHaveContine && !isHave) // { // tx.Rollback(); // throw new Exception("SQL:违背要求" + myDE.CommandText + "返回值必须大于0"); // //return 0; // } // if (myDE.EffentNextType == EffentNextType.WhenNoHaveContine && isHave) // { // tx.Rollback(); // throw new Exception("SQL:违背要求" + myDE.CommandText + "返回值必须等于0"); // //return 0; // } // continue; // } // int val = cmd.ExecuteNonQuery(); // if (myDE.EffentNextType == EffentNextType.ExcuteEffectRows && val == 0) // { // tx.Rollback(); // throw new Exception("SQL:违背要求" + myDE.CommandText + "必须有影响行"); // //return 0; // } // cmd.Parameters.Clear(); // } // string oraConnectionString = PubConstant.GetConnectionString("ConnectionStringPPC"); // bool res = OracleHelper.ExecuteSqlTran(oraConnectionString, oracleCmdSqlList); // if (!res) // { // tx.Rollback(); // throw new Exception("执行失败"); // // return -1; // } // tx.Commit(); // return 1; // } // catch (MySql.Data.MySqlClient.MySqlException e) // { // tx.Rollback(); // throw e; // } // catch (Exception e) // { // tx.Rollback(); // throw e; // } // } //} /// <summary> /// 执行多条SQL语句，实现数据库事务。 /// </summary> /// <param name="SQLStringList">多条SQL语句</param> public static int ExecuteSqlTran(List<String> 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; } } } /// <summary> /// 执行带一个存储过程参数的的SQL语句。 /// </summary> /// <param name="SQLString">SQL语句</param> /// <param name="content">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</param> /// <returns>影响的记录数</returns> 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(); } } } /// <summary> /// 执行带一个存储过程参数的的SQL语句。 /// </summary> /// <param name="SQLString">SQL语句</param> /// <param name="content">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</param> /// <returns>影响的记录数</returns> 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(); } } } /// <summary> /// 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) /// </summary> /// <param name="strSQL">SQL语句</param> /// <param name="fs">图像字节,数据库的字段类型为image的情况</param> /// <returns>影响的记录数</returns> 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(); } } } /// <summary> /// 执行一条计算查询结果语句，返回查询结果（object）。 /// </summary> /// <param name="SQLString">计算查询结果语句</param> /// <returns>查询结果（object）</returns> 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; } } } } 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; } } } } /// <summary> /// 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 ) /// </summary> /// <param name="strSQL">查询语句</param> /// <returns>MySqlDataReader</returns> 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; } } /// <summary> /// 执行查询语句，返回DataSet /// </summary> /// <param name="SQLString">查询语句</param> /// <returns>DataSet</returns> public static DataSet Query(string SQLString) { using (MySqlConnection connection = new MySqlConnection(connectionString)) { DataSet ds = new DataSet(); try { connection.Open(); MySqlDataAdapter command = new MySqlDataAdapter(SQLString, connection); command.Fill(ds, "dataset"); } catch (MySql.Data.MySqlClient.MySqlException ex) { throw new Exception(ex.Message); } return ds; } } 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; } } /// <summary> /// 执行SQL语句，返回影响的记录数 /// </summary> /// <param name="SQLString">SQL语句</param> /// <returns>影响的记录数</returns> 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; } } } } /// <summary> /// 执行多条SQL语句，实现数据库事务。 /// </summary> /// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的MySqlParameter[]）</param> 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; } } } } /// <summary> /// 执行多条SQL语句，实现数据库事务。 /// </summary> /// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的MySqlParameter[]）</param> public static int ExecuteSqlTran(System.Collections.Generic.List<CommandInfo> cmdList) { using (MySqlConnection conn = new MySqlConnection(connectionString)) { conn.Open(); using (MySqlTransaction trans = conn.BeginTransaction()) { MySqlCommand cmd = new MySqlCommand(); try { int count = 0; //循环 foreach (CommandInfo myDE in cmdList) { string cmdText = myDE.CommandText; MySqlParameter[] cmdParms = (MySqlParameter[])myDE.Parameters; PrepareCommand(cmd, conn, trans, cmdText, cmdParms); if (myDE.EffentNextType == EffentNextType.WhenHaveContine || myDE.EffentNextType == EffentNextType.WhenNoHaveContine) { if (myDE.CommandText.ToLower().IndexOf("count(") == -1) { trans.Rollback(); return 0; } object obj = cmd.ExecuteScalar(); bool isHave = false; if (obj == null && obj == DBNull.Value) { isHave = false; } isHave = Convert.ToInt32(obj) > 0; if (myDE.EffentNextType == EffentNextType.WhenHaveContine && !isHave) { trans.Rollback(); return 0; } if (myDE.EffentNextType == EffentNextType.WhenNoHaveContine && isHave) { trans.Rollback(); return 0; } continue; } int val = cmd.ExecuteNonQuery(); count += val; if (myDE.EffentNextType == EffentNextType.ExcuteEffectRows && val == 0) { trans.Rollback(); return 0; } cmd.Parameters.Clear(); } trans.Commit(); return count; } catch { trans.Rollback(); throw; } } } } /// <summary> /// 执行多条SQL语句，实现数据库事务。 /// </summary> /// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的MySqlParameter[]）</param> public static void ExecuteSqlTranWithIndentity(System.Collections.Generic.List<CommandInfo> 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 (CommandInfo myDE in SQLStringList) { string cmdText = myDE.CommandText; MySqlParameter[] cmdParms = (MySqlParameter[])myDE.Parameters; 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; } } } } /// <summary> /// 执行多条SQL语句，实现数据库事务。 /// </summary> /// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的MySqlParameter[]）</param> 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; } } } } /// <summary> /// 执行一条计算查询结果语句，返回查询结果（object）。 /// </summary> /// <param name="SQLString">计算查询结果语句</param> /// <returns>查询结果（object）</returns> 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; } } } } /// <summary> /// 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 ) /// </summary> /// <param name="strSQL">查询语句</param> /// <returns>MySqlDataReader</returns> 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(); // } } /// <summary> /// 执行查询语句，返回DataSet /// </summary> /// <param name="SQLString">查询语句</param> /// <returns>DataSet</returns> 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; } } } 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); } } } /// <summary> /// table转json /// </summary> /// <param name="dt"></param> /// <returns></returns> public static string DataTableToJson(DataTable dt) { StringBuilder jsonBuilder = new StringBuilder(); jsonBuilder.Append("{"Name":"" + dt.TableName + "","Rows"); jsonBuilder.Append("":["); for (int i = 0; i < dt.Rows.Count; i++) { jsonBuilder.Append("{"); for (int j = 0; j < dt.Columns.Count; j++) { jsonBuilder.Append("""); jsonBuilder.Append(dt.Columns[j].ColumnName); jsonBuilder.Append("":""); jsonBuilder.Append(dt.Rows[i][j].ToString().Replace(""", "\"")); jsonBuilder.Append("","); } jsonBuilder.Remove(jsonBuilder.Length - 1, 1); jsonBuilder.Append("},"); } jsonBuilder.Remove(jsonBuilder.Length - 1, 1); jsonBuilder.Append("]"); jsonBuilder.Append("}"); return jsonBuilder.ToString(); } /// <summary> /// dataset转Json /// </summary> /// <param name="ds"></param> /// <returns></returns> public static string DatasetToJson(DataSet ds) { StringBuilder json = new StringBuilder(); json.Append("{"Tables":"); json.Append("["); foreach (DataTable dt in ds.Tables) { json.Append(DataTableToJson(dt)); json.Append(","); } json.Remove(json.Length - 1, 1); json.Append("]"); json.Append("}"); return json.ToString(); } } }