ACCESS数据库C#操作类(SQLHELPER修改版)——转自网上
ACCESS数据库C#操作类(SQLHELPER修改版)
这个是针对ACCESS数据库操作的类,同样也是从SQLHELPER提取而来,分页程序的调用可以参考MSSQL那个类的调用,差不多的,只是提取所有记录的数量的时候有多一个参数,这个需要注意一下!
c# 代码
- using System;
- using System.Text;
- using System.Collections;
- using System.Collections.Specialized;
- using System.Data;
- using System.Data.OleDb;
- using System.Configuration;
- namespace NMJU.Web.DBUtility
- { /// <summary>
- /// 数据访问抽象基础类(ACCESS)
- /// Copyright (C) 2006-2007 NMJU.NET
- /// All rights reserved
- /// </summary>
- public abstract class DbHelperACE
- {
- //数据库连接字符串(web.config来配置)
- //public static string connectionString = ConfigurationManager.AppSettings["ConnectionString"];
- // public static string connectionString = System.Web.HttpContext.Current.Server.MapPath(ConfigurationManager.AppSettings["AccessConnectionString"]);
- public static string connectionString = ConfigurationManager.AppSettings["AccessConnectionString"];
- public DbHelperACE()
- {
- }
- #region 公用方法
- public static int GetMaxID(string FieldName, string TableName)
- {
- string strsql = "select max(" + FieldName + ")+1 from " + TableName;
- object obj = DbHelperACE.GetSingle(strsql);
- if (obj == null)
- {
- return 1;
- }
- else
- {
- return int.Parse(obj.ToString());
- }
- }
- public static bool Exists(string strSql)
- {
- object obj = DbHelperACE.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;
- }
- }
- public static bool Exists(string strSql, params OleDbParameter[] cmdParms)
- {
- object obj = DbHelperACE.GetSingle(strSql, cmdParms);
- int cmdresult;
- if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
- {
- cmdresult = 0;
- }
- else
- {
- cmdresult = int.Parse(obj.ToString());
- }
- if (cmdresult == 0)
- {
- return false;
- }
- else
- {
- return true;
- }
- }
- #endregion
- #region 执行简单SQL语句
- /// <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 (OleDbConnection connection = new OleDbConnection(connectionString))
- {
- using (OleDbCommand cmd = new OleDbCommand(SQLString, connection))
- {
- try
- {
- connection.Open();
- int rows = cmd.ExecuteNonQuery();
- return rows;
- }
- catch (System.Data.OleDb.OleDbException E)
- {
- connection.Close();
- throw new Exception(E.Message);
- }
- }
- }
- }
- /// <summary>
- /// 执行SQL语句,设置命令的执行等待时间
- /// </summary>
- /// <param name="SQLString"></param>
- /// <param name="Times"></param>
- /// <returns></returns>
- public static int ExecuteSqlByTime(string SQLString, int Times)
- {
- using (OleDbConnection connection = new OleDbConnection(connectionString))
- {
- using (OleDbCommand cmd = new OleDbCommand(SQLString, connection))
- {
- try
- {
- connection.Open();
- cmd.CommandTimeout = Times;
- int rows = cmd.ExecuteNonQuery();
- return rows;
- }
- catch (System.Data.OleDb.OleDbException E)
- {
- connection.Close();
- throw new Exception(E.Message);
- }
- }
- }
- }
- /// <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 void ExecuteSqlTran(ArrayList SQLStringList)
- {
- using (OleDbConnection conn = new OleDbConnection(connectionString))
- {
- conn.Open();
- OleDbCommand cmd = new OleDbCommand();
- cmd.Connection = conn;
- OleDbTransaction tx = conn.BeginTransaction();
- cmd.Transaction = tx;
- try
- {
- for (int n = 0; n < SQLStringList.Count; n++)
- {
- string strsql = SQLStringList[n].ToString();
- if (strsql.Trim().Length > 1)
- {
- cmd.CommandText = strsql;
- cmd.ExecuteNonQuery();
- }
- }
- tx.Commit();
- }
- catch (System.Data.OleDb.OleDbException E)
- {
- tx.Rollback();
- throw new Exception(E.Message);
- }
- }
- }
- /// <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 (OleDbConnection connection = new OleDbConnection(connectionString))
- {
- OleDbCommand cmd = new OleDbCommand(strSQL, connection);
- System.Data.OleDb.OleDbParameter myParameter = new System.Data.OleDb.OleDbParameter("@fs", SqlDbType.Image);
- myParameter.Value = fs;
- cmd.Parameters.Add(myParameter);
- try
- {
- connection.Open();
- int rows = cmd.ExecuteNonQuery();
- return rows;
- }
- catch (System.Data.OleDb.OleDbException E)
- {
- throw new Exception(E.Message);
- }
- 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 (OleDbConnection connection = new OleDbConnection(connectionString))
- {
- using (OleDbCommand cmd = new OleDbCommand(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 (System.Data.OleDb.OleDbException e)
- {
- connection.Close();
- throw new Exception(e.Message);
- }
- }
- }
- }
- /// <summary>
- /// 执行查询语句,返回SqlDataReader(使用该方法切记要手工关闭SqlDataReader和连接)
- /// </summary>
- /// <param name="strSQL">查询语句</param>
- /// <returns>SqlDataReader</returns>
- public static OleDbDataReader ExecuteReader(string strSQL)
- {
- OleDbConnection connection = new OleDbConnection(connectionString);
- OleDbCommand cmd = new OleDbCommand(strSQL, connection);
- try
- {
- connection.Open();
- OleDbDataReader myReader = cmd.ExecuteReader();
- return myReader;
- }
- catch (System.Data.OleDb.OleDbException e)
- {
- throw new Exception(e.Message);
- }
- //finally //不能在此关闭,否则,返回的对象将无法使用
- //{
- // 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)
- {
- using (OleDbConnection connection = new OleDbConnection(connectionString))
- {
- DataSet ds = new DataSet();
- try
- {
- connection.Open();
- OleDbDataAdapter command = new OleDbDataAdapter(SQLString, connection);
- command.Fill(ds, "ds");
- }
- catch (System.Data.OleDb.OleDbException ex)
- {
- throw new Exception(ex.Message);
- }
- return ds;
- }
- }
- /// <summary>
- /// 执行查询语句,返回DataSet,设置命令的执行等待时间
- /// </summary>
- /// <param name="SQLString"></param>
- /// <param name="Times"></param>
- /// <returns></returns>
- public static DataSet Query(string SQLString, int Times)
- {
- using (OleDbConnection connection = new OleDbConnection(connectionString))
- {
- DataSet ds = new DataSet();
- try
- {
- connection.Open();
- OleDbDataAdapter command = new OleDbDataAdapter(SQLString, connection);
- command.SelectCommand.CommandTimeout = Times;
- command.Fill(ds, "ds");
- }
- catch (System.Data.OleDb.OleDbException ex)
- {
- throw new Exception(ex.Message);
- }
- return ds;
- }
- }
- #endregion
- #region 执行带参数的SQL语句
- /// <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 OleDbParameter[] cmdParms)
- {
- using (OleDbConnection connection = new OleDbConnection(connectionString))
- {
- using (OleDbCommand cmd = new OleDbCommand())
- {
- try
- {
- PrepareCommand(cmd, connection, null, SQLString, cmdParms);
- int rows = cmd.ExecuteNonQuery();
- cmd.Parameters.Clear();
- return rows;
- }
- catch (System.Data.OleDb.OleDbException E)
- {
- throw new Exception(E.Message);
- }
- }
- }
- }
- /// <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OleDbParameter[])</param>
- public static void ExecuteSqlTran(Hashtable SQLStringList)
- {
- using (OleDbConnection conn = new OleDbConnection(connectionString))
- {
- conn.Open();
- using (OleDbTransaction trans = conn.BeginTransaction())
- {
- OleDbCommand cmd = new OleDbCommand();
- try
- {
- //循环
- foreach (DictionaryEntry myDE in SQLStringList)
- {
- string cmdText = myDE.Key.ToString();
- OleDbParameter[] cmdParms = (OleDbParameter[])myDE.Value;
- PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
- int val = cmd.ExecuteNonQuery();
- 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 OleDbParameter[] cmdParms)
- {
- using (OleDbConnection connection = new OleDbConnection(connectionString))
- {
- using (OleDbCommand cmd = new OleDbCommand())
- {
- 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 (System.Data.OleDb.OleDbException e)
- {
- throw new Exception(e.Message);
- }
- }
- }
- }
- /// <summary>
- /// 执行查询语句,返回SqlDataReader (使用该方法切记要手工关闭SqlDataReader和连接)
- /// </summary>
- /// <param name="strSQL">查询语句</param>
- /// <returns>SqlDataReader</returns>
- public static OleDbDataReader ExecuteReader(string SQLString, params OleDbParameter[] cmdParms)
- {
- OleDbConnection connection = new OleDbConnection(connectionString);
- OleDbCommand cmd = new OleDbCommand();
- try
- {
- PrepareCommand(cmd, connection, null, SQLString, cmdParms);
- OleDbDataReader myReader = cmd.ExecuteReader();
- cmd.Parameters.Clear();
- return myReader;
- }
- catch (System.Data.OleDb.OleDbException e)
- {
- throw new Exception(e.Message);
- }
- //finally //不能在此关闭,否则,返回的对象将无法使用
- //{
- // 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 OleDbParameter[] cmdParms)
- {
- using (OleDbConnection connection = new OleDbConnection(connectionString))
- {
- OleDbCommand cmd = new OleDbCommand();
- PrepareCommand(cmd, connection, null, SQLString, cmdParms);
- using (OleDbDataAdapter da = new OleDbDataAdapter(cmd))
- {
- DataSet ds = new DataSet();
- try
- {
- da.Fill(ds, "ds");
- cmd.Parameters.Clear();
- }
- catch (System.Data.OleDb.OleDbException ex)
- {
- throw new Exception(ex.Message);
- }
- return ds;
- }
- }
- }
- private static void PrepareCommand(OleDbCommand cmd, OleDbConnection conn, OleDbTransaction trans, string cmdText, OleDbParameter[] 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 (OleDbParameter parameter in cmdParms)
- {
- if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
- (parameter.Value == null))
- {
- parameter.Value = DBNull.Value;
- }
- cmd.Parameters.Add(parameter);
- }
- }
- }
- #endregion
- #region 获取根据指定字段排序并分页查询。
- /**/
- /// <summary>
- /// 分页查询数据记录总数获取
- /// </summary>
- /// <param name="_tbName">----要显示的表或多个表的连接</param>
- /// <param name="_ID">----主表的主键</param>
- /// <param name="_strCondition">----查询条件,不需where</param>
- /// <param name="_Dist">----是否添加查询字段的 DISTINCT 默认0不添加/1添加</param>
- /// <returns></returns>
- public static string getPageListCounts(string _ID, string _tbName, string _strCondition, int _Dist)
- {
- //---存放取得查询结果总数的查询语句
- //---对含有DISTINCT的查询进行SQL构造
- //---对含有DISTINCT的总数查询进行SQL构造
- string strTmp = "", SqlSelect = "", SqlCounts = "";
- if (_Dist == 0)
- {
- SqlSelect = "Select ";
- SqlCounts = "COUNT(*)";
- }
- else
- {
- SqlSelect = "Select DISTINCT ";
- SqlCounts = "COUNT(DISTINCT " + _ID + ")";
- }
- if (_strCondition == string.Empty)
- {
- strTmp = SqlSelect + " "+ SqlCounts + " FROM " + _tbName;
- }
- else
- {
- strTmp = SqlSelect + " "+ SqlCounts + " FROM " + " Where (1=1) " + _strCondition;
- }
- return strTmp;
- }
- /// <summary>
- /// 智能返回SQL语句
- /// </summary>
- /// <param name="primaryKey">主键(不能为空)</param>
- /// <param name="queryFields">提取字段(不能为空)</param>
- /// <param name="tableName">表(理论上允许多表)</param>
- /// <param name="condition">条件(可以空)</param>
- /// <param name="OrderBy">排序,格式:字段名+""+ASC(可以空)</param>
- /// <param name="pageSize">分页数(不能为空)</param>
- /// <param name="pageIndex">当前页,起始为:1(不能为空)</param>
- /// <returns></returns>
- public static string getPageListSql(string primaryKey, string queryFields, string tableName, string condition, string orderBy, int pageSize, int pageIndex)
- {
- string strTmp = ""; //---strTmp用于返回的SQL语句
- string SqlSelect = "", SqlPrimaryKeySelect = "", strOrderBy = "", strWhere = " where 1=1 ", strTop = "";
- //0:分页数量
- //1:提取字段
- //2:表
- //3:条件
- //4:主键不存在的记录
- //5:排序
- SqlSelect = " select top {0} {1} from {2} {3} {4} {5}";
- //0:主键
- //1:TOP数量,为分页数*(排序号-1)
- //2:表
- //3:条件
- //4:排序
- SqlPrimaryKeySelect = " and {0} not in (select {1} {0} from {2} {3} {4}) ";
- if (orderBy != "")
- strOrderBy = " order by " + orderBy;
- if (condition != "")
- strWhere += " and " + condition;
- int pageindexsize = (pageIndex - 1) * pageSize;
- if (pageindexsize > 0)
- {
- strTop = " top " + pageindexsize.ToString();
- SqlPrimaryKeySelect = String.Format(SqlPrimaryKeySelect, primaryKey, strTop, tableName, strWhere, strOrderBy);
- strTmp = String.Format(SqlSelect, pageSize.ToString(), queryFields, tableName, strWhere, SqlPrimaryKeySelect, strOrderBy);
- }
- else
- {
- strTmp = String.Format(SqlSelect, pageSize.ToString(), queryFields, tableName, strWhere, "", strOrderBy);
- }
- return strTmp;
- }
- /// <summary>
- /// 获取根据指定字段排序并分页查询。DataSet
- /// </summary>
- /// <param name="pageSize">每页要显示的记录的数目</param>
- /// <param name="pageIndex">要显示的页的索引</param>
- /// <param name="tableName">要查询的数据表</param>
- /// <param name="queryFields">要查询的字段,如果是全部字段请填写:*</param>
- /// <param name="primaryKey">主键字段,类似排序用到</param>
- /// <param name="orderBy">是否为升序排列:0为升序,1为降序</param>
- /// <param name="condition">查询的筛选条件</param>
- /// <returns>返回排序并分页查询的DataSet</returns>
- public static DataSet GetPagingList(string primaryKey, string queryFields, string tableName, string condition, string orderBy, int pageSize, int pageIndex)
- {
- string sql = getPageListSql(primaryKey, queryFields, tableName, condition, orderBy, pageSize, pageIndex);
- return Query(sql);
- }
- public static string GetPagingListSQL(string primaryKey, string queryFields, string tableName, string condition, string orderBy, int pageSize, int pageIndex)
- {
- string sql = getPageListSql(primaryKey, queryFields, tableName, condition, orderBy, pageSize, pageIndex);
- return sql;
- }
- public static int GetRecordCount(string _ID, string _tbName, string _strCondition, int _Dist)
- {
- string sql = getPageListCounts( _ID, _tbName, _strCondition, _Dist);
- object obj = DbHelperACE.GetSingle(sql);
- if (obj == null)
- {
- return 1;
- }
- else
- {
- return int.Parse(obj.ToString());
- }
- }
- #endregion
- }
- }
转载于:https://www.cnblogs.com/HappyQQ/archive/2008/08/15/1269025.html
ACCESS数据库C#操作类(SQLHELPER修改版)——转自网上相关推荐
- mfc搜索新建access字段_MFC ODBC类 Access数据库的操作
MFC ODBC类 Access数据库的操作 2008年11月17日 新建一个Access数据库,数据库名是data.mdb新建一个表Ttest,两个字段ID,name 表内容如下 ID name 1 ...
- Access数据库访问助手类
using System; using System.Collections.Generic; using System.Text; using System.Data; using System.D ...
- 记录Access数据库更新操作大坑一个
对于更新Access数据库的操作,必须保持参数数组与sql语句中参数顺序一致,如下: 1 public bool Update(MyModel model) 2 { 3 StringBuilder s ...
- java解析mdb文件_Access MDB文件解析查询,Access数据库解析工具类MdbUtils
Access MDB文件解析查询,Access数据库解析工具类MdbUtils ================================ ©Copyright 蕃薯耀 2018年9月18日 h ...
- 最新的C#SqlHelper 类苏飞修改版(转载)
/// <summary> /// 类说明:公共的数据库访问访问类 /// 编码日期:2010-4-22 /// 编 码 人:苏飞 /// 联系方式:361983679 Email:[ur ...
- c# 与 Access数据库 dataset操作
下面以Access数据库为例说明,用C#的DataSet类访问数据库的一些操作方法. 操作涉及的主要C#类有: DataSet:对应数据库表的一个集合,实际上是数据库表在内存中的一个缓存 DataTa ...
- php 创建access数据库,PHP操作Access数据库_php
要操作数据库,首先肯定是要先连接数据: 1. 以下是代码片断: $conn = new com("ADODB.Connection"); $connstr = "DRIV ...
- java mysql 操作类_Java 数据库简单操作类
1 packagecom.latiny.db;2 3 import java.io.*;4 import java.sql.*;5 importjava.util.ArrayList;6 import ...
- python不可以操作access数据库_Python操作Access数据库基本操作步骤分析
Python编程语言的出现,带给开发人员非常大的好处.我们可以利用这样一款功能强大的面向对象开源语言来轻松的实现许多特定功能需求.比如Python操作Access数据库的功能实现等等.在Python操 ...
最新文章
- /dev/console,/dev/tty 和 /dev/null
- Undo TableSpace ①.管理方法
- 《java设计模式》之责任链模式
- vue获取剪切板内容_vue通过clipboard插件实现复制到剪切板功能
- python wms_webGIS实践:4_2_python django整合geoserver wms服务
- java 创建数组工具类_用Java创建数组工具类ArrayTool
- linux的centos 怎么安装bzip2
- 第七讲 塔木德破产分配法练习题
- 贺利坚老师汇编课程27笔记(二):loop和[bx]访问连续内存单元
- 安川机器人梯形图指令(三)
- w10计算机字体怎么设置在哪里设置,如何设置修改win10系统电脑的显示字体
- IFC标准是什么标准?IFC标准的发展历程是怎样的?
- 第一、三、四届(2010、2012、2013)山东省ACM
- Mac WebStorm 破解
- 阻抗匹配及Smith圆图简介笔记
- java 生成jni_Javah生成JNI头文件
- 邵东一中2021年高考成绩查询,湖南邵阳2020高考成绩,邵东一中势头强劲,包揽邵阳市文理状元...
- 饥荒无条件制作下载_饥荒完整版
- CCS中下载程序到FALSH与RAM类型切换
- LitePal框架浅析,阿里正式启动2021届春季校招