/// <summary>
/// 这个方法返回sql语句执行后的第一行第一列的值
/// </summary>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdText">查询语句</param>
/// <param name="objParams">查询语句参数</param>
/// <returns>返回结果</returns>
public static object ExecuteScalar(CommandType cmdType, string cmdText, params ObjectParameter[] objParams)
{
object objResult = null;
switch (DbType.ToLower())
{
case "oracle":
objResult = OracleDbHelper.ExecuteScalar(DbConnectionString, cmdType, FormatCommandText(cmdText), ObjectParamterToOracleParameter(objParams));
break;
case "sql":
objResult = SqlDbHelper.ExecuteScalar(DbConnectionString, cmdType, FormatCommandText(cmdText), ObjectParamterToSqlParameter(objParams));
break;
}
return(objResult);
}
/// <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>
/// <returns>OracleDataReader</returns>
public static DbDataReader RunProcedure(string storedProcName, IDataParameter[] parameters)
{
DbDataReader drResult = null;
switch (DbType.ToLower())
{
case "oracle":
drResult = OracleDbHelper.RunProcedure(DbConnectionString, storedProcName, parameters);
break;
case "sql":
drResult = SqlDbHelper.RunProcedure(DbConnectionString, storedProcName, parameters);
break;
}
return(drResult);
}
/// <summary>
/// 执行查询语句，返回OracleDataReader
/// </summary>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdText">查询语句</param>
/// <returns>返回结果</returns>
public static DbDataReader ExecuteReader(CommandType cmdType, string cmdText)
{
DbDataReader drResult = null;
switch (DbType.ToLower())
{
case "oracle":
drResult = OracleDbHelper.ExecuteReader(DbConnectionString, cmdType, cmdText);
break;
case "sql":
drResult = SqlDbHelper.ExecuteReader(DbConnectionString, cmdType, cmdText);
break;
}
return(drResult);
}
/// <summary>
/// 重载ExecuteNonQuery方法,实现对事务处理的可选择性.
/// </summary>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdText">查询语句</param>
/// <param name="objParams">查询语句参数</param>
/// <param name="isTrans">是否使用事务处理</param>
/// <returns>返回结果</returns>
public static int ExecuteNonQuery(CommandType cmdType, string cmdText, bool isTrans, params ObjectParameter[] objParams)
{
int iResult = -1;
switch (DbType.ToLower())
{
case "oracle":
iResult = OracleDbHelper.ExecuteNonQuery(DbConnectionString, cmdType, FormatCommandText(cmdText), isTrans, ObjectParamterToOracleParameter(objParams));
break;
case "sql":
iResult = SqlDbHelper.ExecuteNonQuery(DbConnectionString, cmdType, FormatCommandText(cmdText), isTrans, ObjectParamterToSqlParameter(objParams));
break;
}
return(iResult);
}
/// <summary>
/// 执行查询语句，返回一个DataSet对象
/// </summary>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdText">查询语句</param>
/// <param name="objParams">查询语句参数</param>
/// <returns>返回结果</returns>
public static DataSet Query(CommandType cmdType, string cmdText, params ObjectParameter[] objParams)
{
DataSet dsResult = null;
switch (DbType.ToLower())
{
case "oracle":
dsResult = OracleDbHelper.Query(DbConnectionString, cmdType, FormatCommandText(cmdText), ObjectParamterToOracleParameter(objParams));
break;
case "sql":
dsResult = SqlDbHelper.Query(DbConnectionString, cmdType, FormatCommandText(cmdText), ObjectParamterToSqlParameter(objParams));
break;
}
return(dsResult);
}
/// <summary>
/// 执行查询语句，返回DataSet对象
/// </summary>
/// <param name="cmdText">查询语句</param>
/// <returns>返回结果</returns>
public static DataSet Query(string cmdText)
{
DataSet dsResult = null;
switch (DbType.ToLower())
{
case "oracle":
dsResult = OracleDbHelper.Query(DbConnectionString, cmdText);
break;
case "sql":
dsResult = SqlDbHelper.Query(DbConnectionString, cmdText);
break;
}
return(dsResult);
}
/// <summary>
/// 检查记录是否存在
/// </summary>
/// <param name="cmdText">查询语句</param>
/// <param name="objParams">查询语句参数</param>
/// <returns>返回结果</returns>
public static bool Exists(string cmdText, params ObjectParameter[] objParams)
{
bool bResult = false;
switch (DbType.ToLower())
{
case "oracle":
bResult = OracleDbHelper.Exists(DbConnectionString, FormatCommandText(cmdText), ObjectParamterToOracleParameter(objParams));
break;
case "sql":
bResult = SqlDbHelper.Exists(DbConnectionString, FormatCommandText(cmdText), ObjectParamterToSqlParameter(objParams));
break;
}
return(bResult);
}
/// <summary>
/// 检查记录是否存在
/// </summary>
/// <param name="connString">数据库连接字符串</param>
/// <param name="cmdText">查询语句</param>
/// <param name="cmdParams">查询语句参数</param>
/// <returns>返回结果</returns>
public static bool Exists(string connString, string cmdText, params OracleParameter[] cmdParams)
{
object obj = OracleDbHelper.GetSingle(connString, cmdText, cmdParams);
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);
}
}
