利用DbProviderFactory实现数据操作跨数据库数据操作类

原文：http://www.cnblogs.com/wangzhq/archive/2006/09/14/504309.html#1744469

using System;using System.Collections.Generic;using System.Text;using System.Data;using System.Data.Common;using System.Configuration;using System.Collections;namespace Ths{ /**//// <summary>======================================================== /// /// wangzhq.cnblogs.com /// 数据工厂类,实现了跨数据库的操作. /// ======================================================== /// </summary> public class DataAccess:PageBase { /**//// <summary> /// Webconfig配置连接字符串 /// </summary> private string _confirString = "ConnectionString"; /**//// <summary> /// 数据工厂类 /// </summary> public DataAccess() { } /**//// <summary> /// 数据工厂类 /// </summary> /// <param name="configString">web.config 关键字</param> public DataAccess(string configString) { ConfigString = configString; } /**//// <summary> /// 属性,设置数据库连接字符串 /// </summary> public string ConfigString { get { return _confirString; } set { _confirString = value; } } //==============================================GetProviderName============================== 获得数据库的类型 public string GetProviderName(string ConfigString)#region 获得数据库的类型 public string GetProviderName(string ConfigString) /**//// <summary> /// 返回数据提供者 /// </summary> /// <returns>返回数据提供者</returns> public string GetProviderName(string ConfigString) { ConnectionStringSettingsCollection ConfigStringCollention = ConfigurationManager.ConnectionStrings; if (ConfigStringCollention == null || ConfigStringCollention.Count <= 0) { throw new Exception("web.config 中无连接字符串!"); } ConnectionStringSettings StringSettings = null; if (ConfigString == string.Empty) { StringSettings = ConfigurationManager.ConnectionStrings["ConnectionString"]; } else { StringSettings = ConfigurationManager.ConnectionStrings[ConfigString]; } return StringSettings.ProviderName; } /**//// <summary> /// 返回数据提供者 /// </summary> /// <returns></returns> public string GetProviderName() { return GetProviderName(ConfigString); } #endregion //=====================================================获得连接字符串==================================== /**//// <summary> /// 获得连接字符串 /// </summary> /// <returns></returns> public string GetConnectionString(string ConfigString) { ConnectionStringSettingsCollection ConfigStringCollention = ConfigurationManager.ConnectionStrings; if (ConfigStringCollention == null || ConfigStringCollention.Count <= 0) { throw new Exception("web.config 中无连接字符串!"); } ConnectionStringSettings StringSettings = null; if (ConfigString == string.Empty) { StringSettings = ConfigurationManager.ConnectionStrings["ConnectionString"]; } else { StringSettings = ConfigurationManager.ConnectionStrings[ConfigString]; } return StringSettings.ConnectionString; } public string GetConnectionString() { return GetConnectionString(ConfigString); } //==============================================GetDbproviderFactory========================= 返回数据工厂 public DbProviderFactory GetDbProviderFactory()#region 返回数据工厂 public DbProviderFactory GetDbProviderFactory() /**//// <summary> /// 返回数据工厂 /// </summary> /// <returns></returns> public DbProviderFactory GetDbProviderFactory() { DbProviderFactory f = null; string ProviderName = GetProviderName(); switch (ProviderName) { case "System.Data.SqlClient": f = GetDbProviderFactory("System.Data.SqlClient"); break; case "System.Data.OracleClient": f = GetDbProviderFactory("System.Data.OracleClient"); break; case "System.Data.OleDb": f = GetDbProviderFactory("System.Data.OleDb"); break; default: f = GetDbProviderFactory("System.Data.SqlClient"); break; } return f; } /**//// <summary> /// 返回数据工厂 /// </summary> /// <param name="providername"></param> /// <returns></returns> public DbProviderFactory GetDbProviderFactory(string providername) { return DbProviderFactories.GetFactory(providername); } #endregion //==============================================CreateConnection============================= 创建数据库连接 public DbConnection CreateConnection()#region 创建数据库连接 public DbConnection CreateConnection() /**//// <summary> /// 创建数据库连接 /// </summary> /// <returns></returns> public DbConnection CreateConnection() { DbConnection con = GetDbProviderFactory().CreateConnection(); con.ConnectionString = GetConnectionString(); return con; } /**//// <summary> /// 创建数据库连接 /// </summary> /// <param name="provdername"></param> /// <returns></returns> public DbConnection CreateConnection(string provdername) { DbConnection con = GetDbProviderFactory(provdername).CreateConnection(); con.ConnectionString = GetConnectionString(); return con; } #endregion //==============================================CreateCommand================================ 创建执行命令对象 public override DbCommand CreateCommand(string sql, CommandType cmdType, DbParameter[] parameters)#region 创建执行命令对象 public override DbCommand CreateCommand(string sql, CommandType cmdType, DbParameter[] parameters) /**//// <summary> /// 创建执行命令对象 /// </summary> /// <param name="sql"></param> /// <param name="cmdType"></param> /// <param name="parameters"></param> /// <returns></returns> public DbCommand CreateCommand(string sql, CommandType cmdType, DbParameter[] parameters) { DbCommand _command = GetDbProviderFactory().CreateCommand(); _command.Connection = CreateConnection(); _command.CommandText = sql; _command.CommandType = cmdType; if (parameters != null && parameters.Length > 0) { foreach (DbParameter param in parameters) { _command.Parameters.Add(param); } } return _command; } /**//// <summary> /// 创建执行命令对象 /// </summary> /// <param name="sql">SQL语句</param> /// <returns>执行命令对象实例</returns> public DbCommand CreateCommand(string sql) { DbParameter[] parameters = new DbParameter[0]; return CreateCommand(sql, CommandType.Text, parameters); } /**//// <summary> /// 创建执行命令对象 /// </summary> /// <param name="sql">SQL语句</param> /// <returns>执行命令对象实例</returns> public DbCommand CreateCommand(string sql, CommandType cmdtype) { DbParameter[] parameters = new DbParameter[0]; return CreateCommand(sql, cmdtype, parameters); } /**//// <summary> /// 创建执行命令对象 /// </summary> /// <param name="sql">ＳＱＬ语句</param> /// <param name="parameters">参数</param> /// <returns>执行命令对象实例</returns> public DbCommand CreateCommand(string sql, DbParameter[] parameters) { return CreateCommand(sql, CommandType.Text, parameters); } #endregion //=========================================CreateAdapter()============================================== 创建数据适配器 CreateAdapter(string sql)#region 创建数据适配器 CreateAdapter(string sql) /**//// <summary> /// 创建数据适配器 /// </summary> /// <param name="sql">SQL,语句</param> /// <returns>数据适配器实例</returns> public DbDataAdapter CreateAdapter(string sql) { DbParameter[] parameters = new DbParameter[0]; return CreateAdapter(sql, CommandType.Text, parameters); } /**//// <summary> /// 创建数据适配器 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <returns>数据适配器实例</returns> public DbDataAdapter CreateAdapter(string sql, CommandType cmdtype) { DbParameter[] parameters = new DbParameter[0]; return CreateAdapter(sql, cmdtype, parameters); } /**//// <summary> /// 创建数据适配器 /// </summary> /// <param name="connectionString">数据库连接字符串</param> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <param name="parameters">参数</param> /// <returns>数据适配器实例</returns> public DbDataAdapter CreateAdapter(string sql, CommandType cmdtype, DbParameter[] parameters) { DbConnection _connection = CreateConnection(); DbCommand _command = GetDbProviderFactory().CreateCommand(); _command.Connection = _connection; _command.CommandText = sql; _command.CommandType = cmdtype; if (parameters != null && parameters.Length > 0) { foreach (DbParameter _param in parameters) { _command.Parameters.Add(_param); } } DbDataAdapter da = GetDbProviderFactory().CreateDataAdapter(); da.SelectCommand = _command; return da; } #endregion //=========================================CreateParameter=================================== 生成参数 public override SqlParameter CreateParameter(string field, string dbtype, string value)#region 生成参数 public override SqlParameter CreateParameter(string field, string dbtype, string value) /**//// <summary> /// 创建参数 /// </summary> /// <param name="field">参数字段</param> /// <param name="dbtype">参数类型</param> /// <param name="value">参数值</param> /// <returns></returns> public DbParameter CreateParameter(string field, string dbtype, string value) { DbParameter p = GetDbProviderFactory().CreateParameter(); p.ParameterName = field; p.Value = value; return p; } #endregion //======================================================ExecuteCommand()============================================ 执行非查询语句,并返回受影响的记录行数 ExecuteCommand(string sql)#region 执行非查询语句,并返回受影响的记录行数 ExecuteCommand(string sql) /**//// <summary> /// 执行非查询语句,并返回受影响的记录行数 /// </summary> /// <param name="sql">SQL语句</param> /// <returns>受影响记录行数</returns> public int ExecuteCommand(string sql) { DbParameter[] parameters = new DbParameter[0]; return ExecuteCommand(sql, CommandType.Text, parameters); } /**//// <summary> /// 执行非查询语句,并返回受影响的记录行数 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <returns>受影响记录行数</returns> public int ExecuteCommand(string sql, CommandType cmdtype) { DbParameter[] parameters = new DbParameter[0]; return ExecuteCommand(sql, CommandType.Text, parameters); } /**//// <summary> /// 执行非查询语句,并返回受影响的记录行数 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="parameters">参数</param> /// <returns>受影响记录行数</returns> public int ExecuteCommand(string sql, DbParameter[] parameters) { return ExecuteCommand(sql, CommandType.Text, parameters); } /**//// <summary> ///批量执行SQL语句 /// </summary> /// <param name="SqlList">SQL列表</param> /// <returns></returns> public bool ExecuteCommand(ArrayList SqlList) { DbConnection con = CreateConnection(); con.Open(); bool iserror = false; string strerror = ""; DbTransaction SqlTran =con.BeginTransaction(); try { for (int i = 0; i < SqlList.Count; i++) { DbCommand _command = GetDbProviderFactory().CreateCommand(); _command.Connection = con; _command.CommandText = SqlList[i].ToString(); _command.Transaction = SqlTran; _command.ExecuteNonQuery(); } } catch (Exception ex) { iserror = true; strerror = ex.Message; } finally { if (iserror) { SqlTran.Rollback(); throw new Exception(strerror); } else { SqlTran.Commit(); } con.Close(); } if (iserror) { return false; } else { return true; } } /**//// <summary> /// 执行非查询语句,并返回受影响的记录行数 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <param name="parameters">参数</param> /// <returns>受影响记录行数</returns> public int ExecuteCommand(string sql, CommandType cmdtype, DbParameter[] parameters) { int _result = 0; DbCommand _command = CreateCommand(sql, cmdtype, parameters); try { _command.Connection.Open(); _result = _command.ExecuteNonQuery(); } catch (Exception ex) { throw new Exception(ex.Message); } finally { _command.Connection.Close(); } return _result; } #endregion //=====================================================ExecuteScalar()============================================= 执行非查询语句,并返回首行首列的值 ExecuteScalar(string sql)#region 执行非查询语句,并返回首行首列的值 ExecuteScalar(string sql) /**//// <summary> /// 执行非查询语句,并返回首行首列的值 /// </summary> /// <param name="sql">SQL语句</param> /// <returns>Object</returns> public object ExecuteScalar(string sql) { DbParameter[] parameters = new DbParameter[0]; return ExecuteScalar(sql, CommandType.Text, parameters); } /**//// <summary> /// 执行非查询语句,并返回首行首列的值 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <returns>Object</returns> public object ExecuteScalar(string sql, CommandType cmdtype) { DbParameter[] parameters = new DbParameter[0]; return ExecuteScalar(sql, CommandType.Text, parameters); } /**//// <summary> /// 执行非查询语句,并返回首行首列的值 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="parameters">参数</param> /// <returns>Object</returns> public object ExecuteScalar(string sql, DbParameter[] parameters) { return ExecuteScalar(sql, CommandType.Text, parameters); } /**//// <summary> /// 执行非查询语句,并返回首行首列的值 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <param name="parameters">参数</param> /// <returns>Object</returns> public object ExecuteScalar(string sql, CommandType cmdtype, DbParameter[] parameters) { object _result=null; DbCommand _command = CreateCommand(sql, cmdtype, parameters); try { _command.Connection.Open(); _result = _command.ExecuteScalar(); } catch { throw; } finally { _command.Connection.Close(); } return _result; } #endregion //=====================================================ExecuteReader()============================================= 执行查询，并以DataReader返回结果集 ExecuteReader(string sql)#region 执行查询，并以DataReader返回结果集 ExecuteReader(string sql) /**//// <summary> /// 执行查询，并以DataReader返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <returns>IDataReader</returns> public DbDataReader ExecuteReader(string sql) { DbParameter[] parameters = new DbParameter[0]; return ExecuteReader(sql, CommandType.Text, parameters); } /**//// <summary> /// 执行查询，并以DataReader返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <returns>IDataReader</returns> public DbDataReader ExecuteReader(string sql, CommandType cmdtype) { DbParameter[] parameters = new DbParameter[0]; return ExecuteReader(sql, CommandType.Text, parameters); } /**//// <summary> /// 执行查询，并以DataReader返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="parameters">参数</param> /// <returns>IDataReader</returns> public DbDataReader ExecuteReader(string sql, DbParameter[] parameters) { return ExecuteReader(sql, CommandType.Text, parameters); } /**//// <summary> /// 执行查询，并以DataReader返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <param name="parameters">参数</param> /// <returns>IDataReader</returns> public DbDataReader ExecuteReader(string sql, CommandType cmdtype, DbParameter[] parameters) { DbDataReader _result; DbCommand _command = CreateCommand(sql, cmdtype, parameters); try { _command.Connection.Open(); _result = _command.ExecuteReader(CommandBehavior.CloseConnection); } catch { throw; } finally { } return _result; } #endregion //=====================================================GetDataSet()================================================ 执行查询，并以DataSet返回结果集 GetDataSet(string sql)#region 执行查询，并以DataSet返回结果集 GetDataSet(string sql) /**//// <summary> /// 执行查询，并以DataSet返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <returns>DataSet</returns> public DataSet GetDataSet(string sql) { DbParameter[] parameters = new DbParameter[0]; return GetDataSet(sql, CommandType.Text, parameters); } /**//// <summary> /// 执行查询，并以DataSet返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <returns>DataSet</returns> public virtual DataSet GetDataSet(string sql, CommandType cmdtype) { DbParameter[] parameters = new DbParameter[0]; return GetDataSet(sql, CommandType.Text, parameters); } /**//// <summary> /// 执行查询，并以DataSet返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="parameters">参数</param> /// <returns>DataSet</returns> public virtual DataSet GetDataSet(string sql, DbParameter[] parameters) { return GetDataSet(sql, CommandType.Text, parameters); } /**//// <summary> /// 执行查询，并以DataSet返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <param name="parameters">参数</param> /// <returns>DataSet</returns> public virtual DataSet GetDataSet(string sql, CommandType cmdtype, DbParameter[] parameters) { DataSet _result = new DataSet(); IDataAdapter _dataAdapter = CreateAdapter(sql, cmdtype, parameters); try { _dataAdapter.Fill(_result); } catch { throw; } finally { } return _result; } /**//// <summary> /// 执行查询,并以DataSet返回指定记录的结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="StartIndex">开始索引</param> /// <param name="RecordCount">显示记录</param> /// <returns>DataSet</returns> public virtual DataSet GetDataSet(string sql, int StartIndex, int RecordCount) { return GetDataSet(sql, StartIndex, RecordCount); } #endregion //=====================================================GetDataView()=============================================== 执行查询，并以DataView返回结果集 GetDataView(string sql)#region 执行查询，并以DataView返回结果集 GetDataView(string sql) /**//// <summary> /// 执行查询，并以DataView返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <param name="parameters">参数</param> /// <returns>DataView</returns> public DataView GetDataView(string sql) { DbParameter[] parameters = new DbParameter[0]; DataView dv = GetDataSet(sql, CommandType.Text, parameters).Tables[0].DefaultView; return dv; } /**//// <summary> /// 执行查询，并以DataView返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <param name="parameters">参数</param> /// <returns>DataView</returns> public DataView GetDataView(string sql, CommandType cmdtype) { DbParameter[] parameters = new DbParameter[0]; DataView dv = GetDataSet(sql, cmdtype, parameters).Tables[0].DefaultView; return dv; } /**//// <summary> /// 执行查询，并以DataView返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <param name="parameters">参数</param> /// <returns>DataView</returns> public DataView GetDataView(string sql, DbParameter[] parameters) { DataView dv = GetDataSet(sql, CommandType.Text, parameters).Tables[0].DefaultView; return dv; } /**//// <summary> /// 执行查询，并以DataView返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <param name="parameters">参数</param> /// <returns>DataView</returns> public DataView GetDataView(string sql, CommandType cmdtype, DbParameter[] parameters) { DataView dv = GetDataSet(sql, cmdtype, parameters).Tables[0].DefaultView; return dv; } /**//// <summary> /// 执行查询,并以DataView返回指定记录的结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="StartIndex">开始索引</param> /// <param name="RecordCount">显示记录</param> /// <returns>DataView</returns> public DataView GetDataView(string sql, int StartIndex, int RecordCount) { return GetDataSet(sql, StartIndex, RecordCount).Tables[0].DefaultView; } #endregion //=====================================================GetDataTable()============================================== 执行查询，并以DataTable返回结果集 GetDataTable(string sql)#region 执行查询，并以DataTable返回结果集 GetDataTable(string sql) /**//// <summary> /// 执行查询，并以DataTable返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <param name="parameters">参数</param> /// <returns>DataTable</returns> public DataTable GetDataTable(string sql) { DbParameter[] parameters = new DbParameter[0]; DataTable dt = GetDataSet(sql, CommandType.Text, parameters).Tables[0]; return dt; } /**//// <summary> /// 执行查询，并以DataTable返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <param name="parameters">参数</param> /// <returns>DataTable</returns> public DataTable GetDataTable(string sql, CommandType cmdtype) { DbParameter[] parameters = new DbParameter[0]; DataTable dt = GetDataSet(sql, cmdtype, parameters).Tables[0]; return dt; } /**//// <summary> /// 执行查询，并以DataTable返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <param name="parameters">参数</param> /// <returns>DataTable</returns> public DataTable GetDataTable(string sql, DbParameter[] parameters) { DataTable dt = GetDataSet(sql, CommandType.Text, parameters).Tables[0]; return dt; } /**//// <summary> /// 执行查询，并以DataTable返回结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="cmdtype">命令类型</param> /// <param name="parameters">参数</param> /// <returns>DataTable</returns> public DataTable GetDataTable(string sql, CommandType cmdtype, DbParameter[] parameters) { DataTable dt = GetDataSet(sql, cmdtype, parameters).Tables[0]; return dt; } /**//// <summary> /// 执行查询,并以DataTable返回指定记录的结果集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="StartIndex">开始索引</param> /// <param name="RecordCount">显示记录</param> /// <returns>DataTable</returns> public DataTable GetDataTable(string sql, int StartIndex, int RecordCount) { return GetDataSet(sql, StartIndex, RecordCount).Tables[0]; } /**//// <summary> /// 执行查询,返回以空行填充的指定条数记录集 /// </summary> /// <param name="sql">SQL语句</param> /// <param name="SizeCount">显示记录条数</param> /// <returns>DataTable</returns> public DataTable GetDataTable(string sql, int SizeCount) { DataTable dt = GetDataSet(sql).Tables[0]; int b = SizeCount - dt.Rows.Count; if (dt.Rows.Count < SizeCount) { for (int i = 0; i < b; i++) { DataRow dr = dt.NewRow(); dt.Rows.Add(dr); } } return dt; } #endregion }}