641 lines
23 KiB
C#
641 lines
23 KiB
C#
using System;
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using System.Collections;
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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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namespace 云心电ECG数据解析服务端
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{
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/// <summary>
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/// 数据访问抽象基础类
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/// </summary>
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public abstract class DbHelperMySQL
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{
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//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.
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public static string connectionString = ConfigurationManager.ConnectionStrings["MYSQLConnectionString"].ConnectionString;//连接语句，请按照自己的连接修改
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public DbHelperMySQL()
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{
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}
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#region 公用方法
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/// <summary>
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/// 得到最大值
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/// </summary>
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/// <param name="FieldName"></param>
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/// <param name="TableName"></param>
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/// <returns></returns>
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public static int GetMaxID(string FieldName, string TableName)
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{
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string strsql = "select max(" + FieldName + ")+1 from " + TableName;
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object obj = GetSingle(strsql);
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if (obj == null)
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{
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return 1;
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}
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else
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{
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return int.Parse(obj.ToString());
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}
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}
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/// <summary>
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/// 是否存在
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/// </summary>
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/// <param name="strSql"></param>
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/// <returns></returns>
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public static bool Exists(string strSql)
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{
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object obj = GetSingle(strSql);
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int cmdresult;
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if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
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{
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cmdresult = 0;
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}
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else
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{
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cmdresult = int.Parse(obj.ToString());
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}
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if (cmdresult == 0)
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{
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return false;
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}
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else
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{
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return true;
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}
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}
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/// <summary>
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/// 是否存在（基于MySqlParameter）
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/// </summary>
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/// <param name="strSql"></param>
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/// <param name="cmdParms"></param>
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/// <returns></returns>
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public static bool Exists(string strSql, params MySqlParameter[] cmdParms)
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{
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object obj = GetSingle(strSql, cmdParms);
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int cmdresult;
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if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
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{
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cmdresult = 0;
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}
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else
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{
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cmdresult = int.Parse(obj.ToString());
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}
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if (cmdresult == 0)
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{
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return false;
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}
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else
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{
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return true;
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}
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}
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#endregion
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#region 执行简单SQL语句
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/// <summary>
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/// 执行SQL语句，返回影响的记录数
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/// </summary>
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/// <param name="SQLString">SQL语句</param>
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/// <returns>影响的记录数</returns>
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public static int ExecuteSql(string SQLString)
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{
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using (MySqlConnection connection = new MySqlConnection(connectionString))
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{
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using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
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{
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try
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{
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connection.Open();
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int rows = cmd.ExecuteNonQuery();
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return rows;
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}
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catch (MySql.Data.MySqlClient.MySqlException e)
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{
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connection.Close();
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throw e;
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}
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}
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}
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}
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public static int ExecuteSqlByTime(string SQLString, int Times)
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{
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using (MySqlConnection connection = new MySqlConnection(connectionString))
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{
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using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
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{
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try
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{
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connection.Open();
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cmd.CommandTimeout = Times;
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int rows = cmd.ExecuteNonQuery();
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return rows;
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}
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catch (MySql.Data.MySqlClient.MySqlException e)
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{
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connection.Close();
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throw e;
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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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/// 执行多条SQL语句，实现数据库事务。
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/// </summary>
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/// <param name="SQLStringList">多条SQL语句</param>
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public static int ExecuteSqlTran(List<String> SQLStringList)
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{
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using (MySqlConnection conn = new MySqlConnection(connectionString))
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{
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conn.Open();
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MySqlCommand cmd = new MySqlCommand();
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cmd.Connection = conn;
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MySqlTransaction tx = conn.BeginTransaction();
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cmd.Transaction = tx;
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try
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{
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int count = 0;
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for (int n = 0; n < SQLStringList.Count; n++)
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{
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string strsql = SQLStringList[n];
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if (strsql.Trim().Length > 1)
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{
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cmd.CommandText = strsql;
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count += cmd.ExecuteNonQuery();
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}
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}
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tx.Commit();
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return count;
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}
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catch(Exception ex)
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{
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tx.Rollback();
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return 0;
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}
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}
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}
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/// <summary>
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/// 执行带一个存储过程参数的的SQL语句。
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/// </summary>
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/// <param name="SQLString">SQL语句</param>
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/// <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>
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/// <returns>影响的记录数</returns>
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public static int ExecuteSql(string SQLString, string content)
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{
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using (MySqlConnection connection = new MySqlConnection(connectionString))
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{
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MySqlCommand cmd = new MySqlCommand(SQLString, connection);
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MySql.Data.MySqlClient.MySqlParameter myParameter = new MySql.Data.MySqlClient.MySqlParameter("@content", SqlDbType.NText);
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myParameter.Value = content;
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cmd.Parameters.Add(myParameter);
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try
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{
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connection.Open();
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int rows = cmd.ExecuteNonQuery();
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return rows;
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}
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catch (MySql.Data.MySqlClient.MySqlException e)
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{
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throw e;
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}
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finally
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{
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cmd.Dispose();
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connection.Close();
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}
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}
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}
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/// <summary>
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/// 执行带一个存储过程参数的的SQL语句。
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/// </summary>
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/// <param name="SQLString">SQL语句</param>
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/// <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>
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/// <returns>影响的记录数</returns>
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public static object ExecuteSqlGet(string SQLString, string content)
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{
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using (MySqlConnection connection = new MySqlConnection(connectionString))
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{
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MySqlCommand cmd = new MySqlCommand(SQLString, connection);
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MySql.Data.MySqlClient.MySqlParameter myParameter = new MySql.Data.MySqlClient.MySqlParameter("@content", SqlDbType.NText);
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myParameter.Value = content;
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cmd.Parameters.Add(myParameter);
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try
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{
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connection.Open();
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object obj = cmd.ExecuteScalar();
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if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
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{
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return null;
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}
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else
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{
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return obj;
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}
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}
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catch (MySql.Data.MySqlClient.MySqlException e)
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{
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throw e;
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}
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finally
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{
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cmd.Dispose();
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connection.Close();
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}
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}
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}
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/// <summary>
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/// 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)
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/// </summary>
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/// <param name="strSQL">SQL语句</param>
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/// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
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/// <returns>影响的记录数</returns>
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public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)
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{
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using (MySqlConnection connection = new MySqlConnection(connectionString))
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{
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MySqlCommand cmd = new MySqlCommand(strSQL, connection);
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MySql.Data.MySqlClient.MySqlParameter myParameter = new MySql.Data.MySqlClient.MySqlParameter("@fs", SqlDbType.Image);
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myParameter.Value = fs;
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cmd.Parameters.Add(myParameter);
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try
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{
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connection.Open();
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int rows = cmd.ExecuteNonQuery();
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return rows;
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}
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catch (MySql.Data.MySqlClient.MySqlException e)
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{
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throw e;
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}
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finally
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{
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cmd.Dispose();
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connection.Close();
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}
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}
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}
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/// <summary>
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/// 执行一条计算查询结果语句，返回查询结果（object）。
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/// </summary>
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/// <param name="SQLString">计算查询结果语句</param>
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/// <returns>查询结果（object）</returns>
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public static object GetSingle(string SQLString)
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{
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using (MySqlConnection connection = new MySqlConnection(connectionString))
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{
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using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
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{
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try
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{
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connection.Open();
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object obj = cmd.ExecuteScalar();
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if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
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{
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return null;
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}
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else
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{
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return obj;
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}
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}
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catch (MySql.Data.MySqlClient.MySqlException e)
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{
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connection.Close();
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throw e;
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}
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}
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}
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}
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public static object GetSingle(string SQLString, int Times)
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{
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using (MySqlConnection connection = new MySqlConnection(connectionString))
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{
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using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))
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{
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try
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{
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connection.Open();
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cmd.CommandTimeout = Times;
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object obj = cmd.ExecuteScalar();
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if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
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{
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return null;
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}
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else
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{
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return obj;
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}
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}
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catch (MySql.Data.MySqlClient.MySqlException e)
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{
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connection.Close();
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throw e;
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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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/// 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 )
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/// </summary>
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/// <param name="strSQL">查询语句</param>
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/// <returns>MySqlDataReader</returns>
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public static MySqlDataReader ExecuteReader(string strSQL)
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{
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MySqlConnection connection = new MySqlConnection(connectionString);
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MySqlCommand cmd = new MySqlCommand(strSQL, connection);
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try
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{
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connection.Open();
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MySqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
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return myReader;
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}
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catch (MySql.Data.MySqlClient.MySqlException e)
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{
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throw e;
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}
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}
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/// <summary>
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/// 执行查询语句，返回DataSet
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/// </summary>
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/// <param name="SQLString">查询语句</param>
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/// <returns>DataSet</returns>
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public static DataSet Query(string SQLString)
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{
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using (MySqlConnection connection = new MySqlConnection(connectionString))
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{
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DataSet ds = new DataSet();
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try
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{
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connection.Open();
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MySqlDataAdapter command = new MySqlDataAdapter(SQLString, connection);
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command.Fill(ds, "ds");
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}
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catch (MySql.Data.MySqlClient.MySqlException ex)
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{
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throw new Exception(ex.Message);
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}
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return ds;
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}
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}
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public static DataSet Query(string SQLString, int Times)
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{
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using (MySqlConnection connection = new MySqlConnection(connectionString))
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{
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DataSet ds = new DataSet();
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try
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{
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connection.Open();
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MySqlDataAdapter command = new MySqlDataAdapter(SQLString, connection);
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command.SelectCommand.CommandTimeout = Times;
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command.Fill(ds, "ds");
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}
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catch (MySql.Data.MySqlClient.MySqlException ex)
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{
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throw new Exception(ex.Message);
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}
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return ds;
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}
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}
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#endregion
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#region 执行带参数的SQL语句
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/// <summary>
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/// 执行SQL语句，返回影响的记录数
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/// </summary>
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/// <param name="SQLString">SQL语句</param>
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/// <returns>影响的记录数</returns>
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public static int ExecuteSql(string SQLString, params MySqlParameter[] cmdParms)
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{
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using (MySqlConnection connection = new MySqlConnection(connectionString))
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{
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using (MySqlCommand cmd = new MySqlCommand())
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{
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try
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{
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PrepareCommand(cmd, connection, null, SQLString, cmdParms);
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int rows = cmd.ExecuteNonQuery();
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cmd.Parameters.Clear();
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return rows;
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}
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catch (MySql.Data.MySqlClient.MySqlException e)
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{
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throw e;
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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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/// 执行多条SQL语句，实现数据库事务。
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/// </summary>
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/// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的MySqlParameter[]）</param>
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public static void ExecuteSqlTran(Hashtable SQLStringList)
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{
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using (MySqlConnection conn = new MySqlConnection(connectionString))
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{
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conn.Open();
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using (MySqlTransaction trans = conn.BeginTransaction())
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{
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MySqlCommand cmd = new MySqlCommand();
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try
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{
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//循环
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foreach (DictionaryEntry myDE in SQLStringList)
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{
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string cmdText = myDE.Key.ToString();
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MySqlParameter[] cmdParms = (MySqlParameter[])myDE.Value;
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PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
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int val = cmd.ExecuteNonQuery();
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cmd.Parameters.Clear();
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}
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trans.Commit();
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}
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catch
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{
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trans.Rollback();
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throw;
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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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/// 执行多条SQL语句，实现数据库事务。
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/// </summary>
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/// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的MySqlParameter[]）</param>
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public static void ExecuteSqlTranWithIndentity(Hashtable SQLStringList)
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{
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using (MySqlConnection conn = new MySqlConnection(connectionString))
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{
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conn.Open();
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using (MySqlTransaction trans = conn.BeginTransaction())
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{
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MySqlCommand cmd = new MySqlCommand();
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try
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{
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int indentity = 0;
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//循环
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foreach (DictionaryEntry myDE in SQLStringList)
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{
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string cmdText = myDE.Key.ToString();
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MySqlParameter[] cmdParms = (MySqlParameter[])myDE.Value;
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foreach (MySqlParameter q in cmdParms)
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{
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if (q.Direction == ParameterDirection.InputOutput)
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{
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q.Value = indentity;
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}
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}
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PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
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int val = cmd.ExecuteNonQuery();
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foreach (MySqlParameter q in cmdParms)
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{
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if (q.Direction == ParameterDirection.Output)
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{
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indentity = Convert.ToInt32(q.Value);
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}
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}
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cmd.Parameters.Clear();
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}
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trans.Commit();
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}
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catch
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{
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trans.Rollback();
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throw;
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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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/// 执行一条计算查询结果语句，返回查询结果（object）。
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/// </summary>
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/// <param name="SQLString">计算查询结果语句</param>
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/// <returns>查询结果（object）</returns>
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public static object GetSingle(string SQLString, params MySqlParameter[] cmdParms)
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{
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using (MySqlConnection connection = new MySqlConnection(connectionString))
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{
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using (MySqlCommand cmd = new MySqlCommand())
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{
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try
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{
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PrepareCommand(cmd, connection, null, SQLString, cmdParms);
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object obj = cmd.ExecuteScalar();
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cmd.Parameters.Clear();
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if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
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{
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return null;
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}
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else
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{
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return obj;
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}
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}
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catch (MySql.Data.MySqlClient.MySqlException e)
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{
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throw e;
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}
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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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/// 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 )
|
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/// </summary>
|
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/// <param name="strSQL">查询语句</param>
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/// <returns>MySqlDataReader</returns>
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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);
|
||
}
|
||
}
|
||
}
|
||
|
||
#endregion
|
||
|
||
|
||
|
||
}
|
||
}
|