/// <summary>
/// ���ݲ�ѯ���������Ķ�������
/// </summary>
/// <param name="SQL">SQL</param>
/// <param name="commandType">��������</param>
/// <param name="cmdBehavior">�Բ�ѯ�ͷ��ؽ����Ӱ���˵��</param>
/// <param name="parameters">��������</param>
/// <returns>�����Ķ���</returns>
protected virtual IDataReader ExecuteDataReader(ref string SQL, CommandType commandType, CommandBehavior cmdBehavior,ref IDataParameter[] parameters)
{
IDbConnection conn=GetConnection();
IDbCommand cmd=conn.CreateCommand ();
CompleteCommand(cmd,ref SQL,ref commandType,ref parameters);
DMEDb_CommandLog cmdLog = new DMEDb_CommandLog(true);
IDataReader reader=null;
try
{
//������������������Ϊ�գ���ôǿ���ڶ�ȡ�����ݺ�ر��Ķ��������ݿ����� 2008.3.20
if(cmd.Transaction ==null && cmdBehavior==CommandBehavior.Default )
cmdBehavior=CommandBehavior.CloseConnection ;
reader = cmd.ExecuteReader (cmdBehavior);
}
catch(Exception ex)
{
ErrorMessage=ex.Message ;
//ֻ�г����˴������û�п��������Թر�����
if(cmd.Transaction==null && conn.State ==ConnectionState.Open )
conn.Close ();
bool inTransaction = cmd.Transaction == null ? false : true;
cmdLog.WriteErrLog(cmd, "DMEDb_AdoHelper:" + ErrorMessage);
if (OnErrorThrow)
{
throw new DMEDb_QueryException(ex.Message, cmd.CommandText, commandType, parameters, inTransaction, conn.ConnectionString);
}
}
cmdLog.WriteLog(cmd, "DMEDb_AdoHelper", out _elapsedMilliseconds);
return reader;
}
/// <summary>
/// ִ�в������ݵIJ�ѯ��������Access��SqlServer
/// </summary>
/// <param name="SQL">�������ݵ�SQL</param>
/// <param name="commandType">��������</param>
/// <param name="parameters">��������</param>
/// <param name="ID">Ҫ�����ı��β������²��������е�����IDֵ</param>
/// <returns>���β�ѯ��Ӱ�������</returns>
public virtual int ExecuteInsertQuery(string SQL,CommandType commandType,IDataParameter[] parameters,ref object ID)
{
IDbConnection conn=GetConnection();
IDbCommand cmd=conn.CreateCommand ();
CompleteCommand(cmd,ref SQL,ref commandType,ref parameters);
DMEDb_CommandLog cmdLog = new DMEDb_CommandLog(true);
bool inner=false;
int result=-1;
ID=0;
try
{
if(cmd.Transaction ==null)
{
inner=true;
cmd.Transaction=conn.BeginTransaction ();
}
result=cmd.ExecuteNonQuery ();
cmd.CommandText = this.InsertKey;// "SELECT @@IDENTITY";
ID=cmd.ExecuteScalar ();
//������ڲ��������������ύ�������ⲿ�����߾�����ʱ�ύ����
if(inner)
{
cmd.Transaction.Commit ();
cmd.Transaction=null;
}
}
catch(Exception ex)
{
ErrorMessage=ex.Message ;
bool inTransaction = cmd.Transaction == null ? false : true;
if(cmd.Transaction!=null)
cmd.Transaction.Rollback ();
if(inner)
cmd.Transaction=null;
cmdLog.WriteErrLog(cmd, "DMEDb_AdoHelper:" + ErrorMessage);
if (OnErrorThrow)
{
throw new DMEDb_QueryException(ex.Message, cmd.CommandText , commandType, parameters, inTransaction, conn.ConnectionString);
}
}
finally
{
if(cmd.Transaction==null && conn.State ==ConnectionState.Open )
conn.Close ();
}
cmdLog.WriteLog(cmd, "DMEDb_AdoHelper", out _elapsedMilliseconds);
return result;
}
/// <summary>
/// ִ�з��ص�һֵ�ò�ѯ
/// </summary>
/// <param name="SQL">SQL</param>
/// <param name="commandType">��������</param>
/// <param name="parameters">��������</param>
/// <returns>��ѯ���</returns>
public virtual object ExecuteScalar(string SQL,CommandType commandType,IDataParameter[] parameters)
{
IDbConnection conn=GetConnection();
IDbCommand cmd=conn.CreateCommand ();
CompleteCommand(cmd,ref SQL,ref commandType,ref parameters);
DMEDb_CommandLog cmdLog = new DMEDb_CommandLog(true);
object result=null;
try
{
result=cmd.ExecuteScalar ();
//����������������ϲ�����߾�����ʱ�ύ����
}
catch(Exception ex)
{
ErrorMessage =ex.Message ;
//�������������ô�˴�Ӧ�û�������
//if(cmd.Transaction!=null)
// cmd.Transaction.Rollback ();
bool inTransaction = cmd.Transaction == null ? false : true;
cmdLog.WriteErrLog(cmd, "DMEDb_AdoHelper:" + ErrorMessage);
if (OnErrorThrow)
{
throw new DMEDb_QueryException(ex.Message, cmd.CommandText, commandType, parameters, inTransaction, conn.ConnectionString);
}
}
finally
{
if(cmd.Transaction==null && conn.State ==ConnectionState.Open )
conn.Close ();
}
cmdLog.WriteLog(cmd, "DMEDb_AdoHelper", out _elapsedMilliseconds);
return result;
}
/// <summary>
/// ִ�з������ݼ��IJ�ѯ
/// </summary>
/// <param name="SQL">SQL</param>
/// <param name="commandType">��������</param>
/// <param name="parameters">��������</param>
/// <returns>���ݼ�</returns>
public virtual DataSet ExecuteDataSet(string SQL,CommandType commandType,IDataParameter[] parameters)
{
IDbConnection conn=GetConnection();
IDbCommand cmd=conn.CreateCommand ();
CompleteCommand(cmd,ref SQL,ref commandType,ref parameters);
IDataAdapter ada=GetDataAdapter(cmd);
DMEDb_CommandLog cmdLog = new DMEDb_CommandLog(true);
DataSet ds=new DataSet ();
try
{
ada.Fill(ds);//FillSchema(ds,SchemaType.Mapped )
}
catch(Exception ex)
{
ErrorMessage=ex.Message ;
bool inTransaction = cmd.Transaction == null ? false : true;
cmdLog.WriteErrLog(cmd, "DMEDb_AdoHelper:" + ErrorMessage);
if (OnErrorThrow)
{
throw new DMEDb_QueryException(ex.Message, cmd.CommandText, commandType, parameters, inTransaction, conn.ConnectionString);
}
}
finally
{
if(cmd.Transaction==null && conn.State ==ConnectionState.Open )
conn.Close ();
}
cmdLog.WriteLog(cmd, "DMEDb_AdoHelper", out _elapsedMilliseconds);
return ds;
}
