Ado.net的一个工厂模式的DbHelper(转)

下面是Ado.net的一个工厂模式的DbHelper:
using System;
using System.Collections;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.Common;
using System.Data.OleDb;
using System.Linq;
using System.Text;

namespace TaxInvionce
{
class DbHelper
{
private static string dbProviderName = ConfigurationSettings.AppSettings["DbProviderName"];
//private static string dbp = "Provider=System.Data.OleDb";
private static string dbConnectionString = ConfigurationManager.AppSettings["TaxInvoiceConn"];

private DbConnection connection;
public DbHelper()
{
this.connection = CreateConnection(DbHelper.dbConnectionString);
}

public DbHelper(string connectionString)
{
this.connection = CreateConnection(connectionString);
}

public static DbConnection CreateConnection()
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbConnection dbconn = dbfactory.CreateConnection();
dbconn.ConnectionString = DbHelper.dbConnectionString;
return dbconn;
}
public static DbConnection CreateConnection(string connectionString)
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbConnection dbconn = dbfactory.CreateConnection();
dbconn.ConnectionString = connectionString;
return dbconn;
}

public DbCommand GetStoredProcCommond(string storedProcedure)
{
DbCommand dbCommand = connection.CreateCommand();
dbCommand.CommandText = storedProcedure;
dbCommand.CommandType = CommandType.StoredProcedure;
return dbCommand;
}
public DbCommand GetSqlStringCommond(string sqlQuery)
{
DbCommand dbCommand = connection.CreateCommand();
dbCommand.CommandText = sqlQuery;
dbCommand.CommandType = CommandType.Text;
return dbCommand;
}
#region 增加参数
public void AddParameterCollection(DbCommand cmd, DbParameterCollection dbParameterCollection)
{
foreach (DbParameter dbParameter in dbParameterCollection)
{
cmd.Parameters.Add(dbParameter);
}
}
public void AddOutParameter(DbCommand cmd, string parameterName, DbType dbType, int size)
{
DbParameter dbParameter = cmd.CreateParameter();
dbParameter.DbType = dbType;
dbParameter.ParameterName = parameterName;
dbParameter.Size = size;
dbParameter.Direction = ParameterDirection.Output;
cmd.Parameters.Add(dbParameter);
}
public void AddInParameter(DbCommand cmd, string parameterName, DbType dbType, object value)
{
DbParameter dbParameter = cmd.CreateParameter();
dbParameter.DbType = dbType;
dbParameter.ParameterName = parameterName;
dbParameter.Value = value;
dbParameter.Direction = ParameterDirection.Input;
cmd.Parameters.Add(dbParameter);
}
public void AddReturnParameter(DbCommand cmd, string parameterName, DbType dbType)
{
DbParameter dbParameter = cmd.CreateParameter();
dbParameter.DbType = dbType;
dbParameter.ParameterName = parameterName;
dbParameter.Direction = ParameterDirection.ReturnValue;
cmd.Parameters.Add(dbParameter);
}
public DbParameter GetParameter(DbCommand cmd, string parameterName)
{
return cmd.Parameters[parameterName];
}

#endregion
#region 执行
public DataSet ExecuteDataSet(DbCommand cmd)
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataSet ds = new DataSet();
dbDataAdapter.Fill(ds);
return ds;
}

public DataTable ExecuteDataTable(DbCommand cmd)
{
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataTable dataTable = new DataTable();
dbDataAdapter.Fill(dataTable);
return dataTable;
}

public DbDataReader ExecuteReader(DbCommand cmd)
{
cmd.Connection.Open();
DbDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return reader;
}
public int ExecuteNonQuery(DbCommand cmd)
{
cmd.Connection.Open();
int ret = cmd.ExecuteNonQuery();
cmd.Connection.Close();
return ret;
}

public object ExecuteScalar(DbCommand cmd)
{
cmd.Connection.Open();
object ret = cmd.ExecuteScalar();
cmd.Connection.Close();
return ret;
}

#endregion
#region 执行事务
public DataSet ExecuteDataSet(DbCommand cmd, Trans t)
{
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataSet ds = new DataSet();
dbDataAdapter.Fill(ds);
return ds;
}

public DataTable ExecuteDataTable(DbCommand cmd, Trans t)
{
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
DbProviderFactory dbfactory = DbProviderFactories.GetFactory(DbHelper.dbProviderName);
DbDataAdapter dbDataAdapter = dbfactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
DataTable dataTable = new DataTable();
dbDataAdapter.Fill(dataTable);
return dataTable;
}

public DbDataReader ExecuteReader(DbCommand cmd, Trans t)
{
cmd.Connection.Close();
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
DbDataReader reader = cmd.ExecuteReader();
DataTable dt = new DataTable();
return reader;
}
public int ExecuteNonQuery(DbCommand cmd, Trans t)
{
cmd.Connection.Close();
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
int ret = cmd.ExecuteNonQuery();
return ret;
}

public object ExecuteScalar(DbCommand cmd, Trans t)
{
cmd.Connection.Close();
cmd.Connection = t.DbConnection;
cmd.Transaction = t.DbTrans;
object ret = cmd.ExecuteScalar();
return ret;
}
#endregion
}

public class Trans : IDisposable
{
private DbConnection conn;
private DbTransaction dbTrans;
public DbConnection DbConnection
{
get { return this.conn; }
}
public DbTransaction DbTrans
{
get { return this.dbTrans; }
}

public Trans()
{
conn = DbHelper.CreateConnection();
conn.Open();
dbTrans = conn.BeginTransaction();
}
public Trans(string connectionString)
{
conn = DbHelper.CreateConnection(connectionString);
conn.Open();
dbTrans = conn.BeginTransaction();
}
public void Commit()
{
dbTrans.Commit();
this.Colse();
}

public void RollBack()
{
dbTrans.Rollback();
this.Colse();
}

public void Dispose()
{
this.Colse();
}

public void Colse()
{
if (conn.State == System.Data.ConnectionState.Open)
{
conn.Close();
}
}

}
}

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Ado.net的一个工厂模式的DbHelper(转)

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