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@@ -0,0 +1,659 @@
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+using MySql.Data.MySqlClient;
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+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 System.Linq;
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+using System.Text;
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+using System.Threading.Tasks;
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+namespace TimedUpload
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+{
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+ class MysqlHelper
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+ {
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+ //数据库连接字符串(app.config来配置)，可以动态更改connectionString支持多数据库.
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+ private static string connectionString = ConfigurationManager.AppSettings["dbMysql"];
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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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+
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+ #region 执行简单SQL语句
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+
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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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+
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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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+
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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
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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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+
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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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+ }
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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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+
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+
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+
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+ #endregion
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+
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+ #region 执行带参数的SQL语句
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+
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|
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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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|
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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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|
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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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|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /// <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>
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|
|
+ public static void ExecuteSqlTranWithIndentity(Hashtable SQLStringList)
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|
|
+ {
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|
|
+ 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);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ public static DataTable Fill(String sql)
|
|
|
+ {
|
|
|
+ DataTable dt = null;
|
|
|
+ try
|
|
|
+ {
|
|
|
+ DataSet ds = Query(sql);
|
|
|
+ if (ds.Tables.Count > 0)
|
|
|
+ {
|
|
|
+ dt = ds.Tables[0];
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ }
|
|
|
+ catch (Exception ex)
|
|
|
+ {
|
|
|
+ dt = null;
|
|
|
+ //throw;
|
|
|
+ }
|
|
|
+ return dt;
|
|
|
+ }
|
|
|
+
|
|
|
+ #endregion
|
|
|
+ }
|
|
|
+}
|
