678 lines
23 KiB
C#
678 lines
23 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Specialized;
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using System.Data;
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using System.Data.SqlClient;
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using System.Configuration;
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namespace Dictionary.DBUtility
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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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/// Copyright (C) 2004-2008
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/// All rights reserved
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/// </summary>
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public abstract class DbHelperSQL
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{
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//数据库连接字符串(web.config来配置)
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public static string _dbconnString = ConfigurationSettings.AppSettings["_dbconnString"];
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//public static string _dbconnString = LTP.Common.DEncrypt.DESEncrypt.Decrypt(LTP.Common.ConfigHelper.GetConfigString("_dbconnString"));
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public DbHelperSQL()
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{
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}
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#region 公用方法
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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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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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public static bool Exists(string strSql, params SqlParameter[] 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 (IDbCommand cmd = _dbf.GetDBCommand(SQLString, _dbconn))
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{
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try
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{
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Open();
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int rows = cmd.ExecuteNonQuery();
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return rows;
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}
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catch (Exception E)
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{
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Close();
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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SQL语句，设置命令的执行等待时间
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/// </summary>
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/// <param name="SQLString"></param>
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/// <param name="Times"></param>
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/// <returns></returns>
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public static int ExecuteSqlByTime(string SQLString, int Times)
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{
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using (IDbCommand cmd = _dbf.GetDBCommand(SQLString, _dbconn))
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{
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try
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{
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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 (Exception E)
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{
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Close();
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throw new Exception(E.Message);
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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 void ExecuteSqlTran(ArrayList SQLStringList)
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{
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conn.Open();
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IDbCommand cmd = _dbf.GetDBCommand();//IDbCommand cmd = _dbf.GetDBCommand();
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cmd.Connection = _dbconn;
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TransBegin();
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cmd.Transaction = _dbtrans
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try
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{
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for (int n = 0; n < SQLStringList.Count; n++)
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{
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string strsql = SQLStringList[n].ToString();
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if (strsql.Trim().Length > 1)
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{
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cmd.CommandText = strsql;
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cmd.ExecuteNonQuery();
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}
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}
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TransCommit();
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}
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catch (Exception E)
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{
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tx.Rollback();
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throw new Exception(E.Message);
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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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IDbCommand cmd = _dbf.GetDBCommand(SQLString, _dbconn);
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IDbDataParameter myParameter =_dbf.GetParameter("@content", DbType.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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Open();
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int rows = cmd.ExecuteNonQuery();
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return rows;
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}
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catch (Exception E)
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{
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throw new Exception(E.Message);
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}
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finally
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{
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cmd.Dispose();
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Close();
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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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IDbCommand cmd = _dbf.GetDBCommand(SQLString, _dbconn);
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IDbDataParameter myParameter =_dbf.GetParameter("@content", DbType.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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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 (Exception E)
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{
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throw new Exception(E.Message);
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}
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finally
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{
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cmd.Dispose();
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Close();
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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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IDbCommand cmd = _dbf.GetDBCommand(strSQL, _dbconn);
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IDbDataParameter myParameter =_dbf.GetParameter("@fs", DbType.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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Open();
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int rows = cmd.ExecuteNonQuery();
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return rows;
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}
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catch (Exception E)
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{
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throw new Exception(E.Message);
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}
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finally
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{
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cmd.Dispose();
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Close();
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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 (IDbCommand cmd = _dbf.GetDBCommand(SQLString, _dbconn))
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{
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try
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{
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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 (Exception e)
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{
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Close();
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throw new Exception(e.Message);
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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SqlDataReader(使用该方法切记要手工关闭SqlDataReader和连接)
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/// </summary>
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/// <param name="strSQL">查询语句</param>
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/// <returns>SqlDataReader</returns>
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public static IDbDataReader ExecuteReader(string strSQL)
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{
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IDbCommand cmd = _dbf.GetDBCommand(strSQL, _dbconn);
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try
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{
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Open();
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IDataReader myReader =GetDataReader( cmd);
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return myReader;
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}
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catch (Exception e)
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{
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throw new Exception(e.Message);
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}
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//finally //不能在此关闭，否则，返回的对象将无法使用
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//{
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// cmd.Dispose();
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// Close();
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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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try
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{
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IDbCommand dbc = _dbf.GetDBCommand();
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if (_dbtrans != null)
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{
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dbc.Transaction = _dbtrans;
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}
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dbc.Connection = _dbconn;
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dbc.CommandText = sql;
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IDbDataAdapter ida = _dbf.GetDataAdapter(dbc);
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DataSet ds = new DataSet();
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ida.Fill(ds);
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return ds;
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}
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catch (Exception ex)
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{
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_DBConnInfo = ex.Message;
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throw ex;
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//return null;
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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,设置命令的执行等待时间
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/// </summary>
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/// <param name="SQLString"></param>
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/// <param name="Times"></param>
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/// <returns></returns>
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public static DataSet Query(string SQLString, int Times)
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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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Open();
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IDbCommand dbc = _dbf.GetDBCommand();
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if (_dbtrans != null)
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{
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dbc.Transaction = _dbtrans;
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}
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dbc.Connection = _dbconn;
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dbc.CommandText = SQLString;
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SqlDataAdapter command = new SqlDataAdapter(dbc);
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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 (Exception 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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#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 IDbDataParameter[] cmdParms)
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{
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using (IDbCommand cmd = _dbf.GetDBCommand())
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{
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try
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{
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PrepareCommand(cmd, _dbconn, 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 (Exception E)
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{
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throw new Exception(E.Message);
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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SqlParameter[]）</param>
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public static void ExecuteSqlTran(Hashtable SQLStringList)
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{
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Open();
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TransBegin();
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IDbCommand cmd = _dbf.GetDBCommand();
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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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IDbDataParameter[] cmdParms = (IDbDataParameter[])myDE.Value;
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PrepareCommand(cmd, _dbconn, _dbtrans, cmdText, cmdParms);
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int val = cmd.ExecuteNonQuery();
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cmd.Parameters.Clear();
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TransCommit();
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}
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}
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catch
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{
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TransRollback();
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throw;
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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 IDbDataParameter[] cmdParms)
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{
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using (IDbCommand cmd = _dbf.GetDBCommand())
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{
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try
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{
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PrepareCommand(cmd, _dbconn, 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 (Exception e)
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{
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throw new Exception(e.Message);
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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SqlDataReader (使用该方法切记要手工关闭SqlDataReader和连接)
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/// </summary>
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/// <param name="strSQL">查询语句</param>
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/// <returns>SqlDataReader</returns>
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public static IDataReader ExecuteReader(string SQLString, params IDbDataParameter[] cmdParms)
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{
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IDbCommand cmd = _dbf.GetDBCommand();
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try
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{
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PrepareCommand(cmd, _dbconn, null, SQLString, cmdParms);
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IDataReader myReader =_dbf.GetDataReader( cmd);
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cmd.Parameters.Clear();
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return myReader;
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}
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catch (Exception e)
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{
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throw new Exception(e.Message);
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}
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//finally //不能在此关闭，否则，返回的对象将无法使用
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//{
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// cmd.Dispose();
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// Close();
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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, params IDbDataParameter[] cmdParms)
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{
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IDbCommand cmd = _dbf.GetDBCommand();
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PrepareCommand(cmd, _dbconn, null, SQLString, cmdParms);
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using (IDataAdapter da = _dbf.GetDataAdapter(cmd))
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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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da.Fill(ds, "ds");
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cmd.Parameters.Clear();
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}
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catch (Exception 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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private static void PrepareCommand(IDbCommand cmd, IDbConnection conn, IDbTransaction trans, string cmdText, SqlParameter[] cmdParms)
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{
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Open();
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cmd.Connection = _dbconn;
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cmd.CommandText = cmdText;
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if (trans != null)
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cmd.Transaction = trans;
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cmd.CommandType = CommandType.Text;//cmdType;
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if (cmdParms != null)
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{
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foreach (IDbDataParameter parameter in cmdParms)
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{
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if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
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(parameter.Value == null))
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{
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parameter.Value = DBNull.Value;
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}
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cmd.Parameters.Add(parameter);
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}
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}
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}
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#endregion
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#region 存储过程操作
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/// <summary>
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/// 执行存储过程 (使用该方法切记要手工关闭SqlDataReader和连接)
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/// </summary>
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/// <param name="storedProcName">存储过程名</param>
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/// <param name="parameters">存储过程参数</param>
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/// <returns>SqlDataReader</returns>
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public static IDataReader RunProcedure(string storedProcName, IDataParameter[] parameters)
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{
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SqlDataReader returnReader;
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Open();
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IDbCommand command = BuildQueryCommand(_dbconn, storedProcName, parameters);
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command.CommandType = CommandType.StoredProcedure;
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returnReader =_dbf.GetDataReader();
|
||
//Close(); 不能在此关闭，否则，返回的对象将无法使用
|
||
return returnReader;
|
||
|
||
}
|
||
|
||
|
||
/// <summary>
|
||
/// 执行存储过程
|
||
/// </summary>
|
||
/// <param name="storedProcName">存储过程名</param>
|
||
/// <param name="parameters">存储过程参数</param>
|
||
/// <param name="tableName">DataSet结果中的表名</param>
|
||
/// <returns>DataSet</returns>
|
||
public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName)
|
||
{
|
||
|
||
DataSet dataSet = new DataSet();
|
||
Open();
|
||
IDbDataAdapter sqlDA = _dbf.GetDataAdapter();
|
||
sqlDA.SelectCommand = BuildQueryCommand(_dbconn, storedProcName, parameters);
|
||
sqlDA.Fill(dataSet, tableName);
|
||
Close();
|
||
return dataSet;
|
||
|
||
}
|
||
public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName, int Times)
|
||
{
|
||
|
||
DataSet dataSet = new DataSet();
|
||
Open();
|
||
IDbDataAdapter sqlDA = _dbf.GetDataAdapter();
|
||
sqlDA.SelectCommand = BuildQueryCommand(_dbconn, storedProcName, parameters);
|
||
sqlDA.SelectCommand.CommandTimeout = Times;
|
||
sqlDA.Fill(dataSet, tableName);
|
||
Close();
|
||
return dataSet;
|
||
|
||
}
|
||
|
||
|
||
/// <summary>
|
||
/// 构建 SqlCommand 对象(用来返回一个结果集，而不是一个整数值)
|
||
/// </summary>
|
||
/// <param name="_dbconn">数据库连接</param>
|
||
/// <param name="storedProcName">存储过程名</param>
|
||
/// <param name="parameters">存储过程参数</param>
|
||
/// <returns>SqlCommand</returns>
|
||
private static IDbCommand BuildQueryCommand(IDbConnection _dbconn, string storedProcName, IDataParameter[] parameters)
|
||
{
|
||
IDbCommand command = _dbf.GetDBCommand(storedProcName, _dbconn);
|
||
command.CommandType = CommandType.StoredProcedure;
|
||
foreach (SqlParameter parameter in parameters)
|
||
{
|
||
if (parameter != null)
|
||
{
|
||
// 检查未分配值的输出参数,将其分配以DBNull.Value.
|
||
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
|
||
(parameter.Value == null))
|
||
{
|
||
parameter.Value = DBNull.Value;
|
||
}
|
||
command.Parameters.Add(parameter);
|
||
}
|
||
}
|
||
|
||
return command;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 执行存储过程，返回影响的行数
|
||
/// </summary>
|
||
/// <param name="storedProcName">存储过程名</param>
|
||
/// <param name="parameters">存储过程参数</param>
|
||
/// <param name="rowsAffected">影响的行数</param>
|
||
/// <returns></returns>
|
||
public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
|
||
{
|
||
|
||
int result;
|
||
Open();
|
||
IDbCommand command = BuildIntCommand(_dbconn, storedProcName, parameters);
|
||
rowsAffected = command.ExecuteNonQuery();
|
||
result = (int)command.Parameters["ReturnValue"].Value;
|
||
//Close();
|
||
return result;
|
||
|
||
}
|
||
|
||
/// <summary>
|
||
/// 创建 SqlCommand 对象实例(用来返回一个整数值)
|
||
/// </summary>
|
||
/// <param name="storedProcName">存储过程名</param>
|
||
/// <param name="parameters">存储过程参数</param>
|
||
/// <returns>SqlCommand 对象实例</returns>
|
||
private static IDbCommand BuildIntCommand(IDbConnection _dbconn, string storedProcName, IDataParameter[] parameters)
|
||
{
|
||
IDbCommand command = BuildQueryCommand(_dbconn, storedProcName, parameters);
|
||
command.Parameters.Add(new SqlParameter("ReturnValue",
|
||
SqlDbType.Int, 4, ParameterDirection.ReturnValue,
|
||
false, 0, 0, string.Empty, DataRowVersion.Default, null));
|
||
return command;
|
||
}
|
||
#endregion
|
||
|
||
}
|
||
|
||
}
|