using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Configuration;
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using System.Data;
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using System.Data.OracleClient;
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namespace BatchService.Framework.Utility
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{
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/// <summary>
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/// A helper class used to execute queries against an Oracle database
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/// </summary>
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public abstract class OracleHelper
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{
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// Read the connection strings from the configuration file
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public static readonly string ConnectionStringLocalTransaction = ConfigurationManager.AppSettings["OraConnString1"];
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public static readonly string ConnectionStringInventoryDistributedTransaction = ConfigurationManager.AppSettings["OraConnString2"];
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public static readonly string ConnectionStringOrderDistributedTransaction = ConfigurationManager.AppSettings["OraConnString3"];
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public static readonly string ConnectionStringProfile = ConfigurationManager.AppSettings["OraProfileConnString"];
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public static readonly string ConnectionStringMembership = ConfigurationManager.AppSettings["OraMembershipConnString"];
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//Create a hashtable for the parameter cached
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private static Hashtable parmCache = Hashtable.Synchronized(new Hashtable());
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public static IEnumerable<Dictionary<string, object>> Serialize(OracleDataReader reader)
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{
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var results = new List<Dictionary<string, object>>();
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var cols = new List<string>();
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for (var i = 0; i < reader.FieldCount; i++)
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cols.Add(reader.GetName(i));
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while (reader.Read())
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results.Add(SerializeRow(cols, reader));
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reader.Close();
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reader.Dispose();
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return results;
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}
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private static Dictionary<string, object> SerializeRow(IEnumerable<string> cols,
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OracleDataReader reader)
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{
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var result = new Dictionary<string, object>();
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foreach (var col in cols)
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result.Add(col, reader[col]);
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return result;
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}
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/// <summary>
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/// Execute a database query which does not include a select
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/// </summary>
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/// <param name="connString">Connection string to database</param>
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/// <param name="cmdType">Command type either stored procedure or SQL</param>
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/// <param name="cmdText">Acutall SQL Command</param>
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/// <param name="commandParameters">Parameters to bind to the command</param>
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/// <returns></returns>
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public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
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{
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BatchService.Framework.Utility.LogHelper.Debug(
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string.Format("执行ORACLE操作:连接字符串:{0}\r\n SQL:{1}", connectionString, cmdText));
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// Create a new Oracle command
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OracleCommand cmd = new OracleCommand();
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//Create a connection
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using (OracleConnection connection = new OracleConnection(connectionString))
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{
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//Prepare the command
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PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
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//Execute the command
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int val = cmd.ExecuteNonQuery();
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LogHelper.Debug(string.Format("执行SQL结果:{0}", val));
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connection.Close();
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cmd.Parameters.Clear();
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return val;
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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 connectionString, string SQLString)
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{
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using (OracleConnection connection = new OracleConnection(connectionString))
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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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connection.Open();
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OracleDataAdapter command = new OracleDataAdapter(SQLString, connection);
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command.Fill(ds, "ds");
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}
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catch (OracleException ex)
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{
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throw new Exception(ex.Message);
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}
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finally
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{
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if (connection.State != ConnectionState.Closed)
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{
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connection.Close();
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}
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}
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return ds;
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}
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}
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public static DataSet Query(string connectionString, string SQLString, params OracleParameter[] cmdParms)
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{
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using (OracleConnection connection = new OracleConnection(connectionString))
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{
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OracleCommand cmd = new OracleCommand();
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PrepareCommand(cmd, connection, null, SQLString, cmdParms);
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using (OracleDataAdapter da = new OracleDataAdapter(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 (System.Data.OracleClient.OracleException ex)
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{
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throw new Exception(ex.Message);
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}
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finally
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{
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if (connection.State != ConnectionState.Closed)
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{
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connection.Close();
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}
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}
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return ds;
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}
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}
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}
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private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, string cmdText, OracleParameter[] cmdParms)
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{
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if (conn.State != ConnectionState.Open)
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conn.Open();
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cmd.Connection = conn;
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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 (OracleParameter 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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/// <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 connectionString, string SQLString)
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{
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using (OracleConnection connection = new OracleConnection(connectionString))
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{
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using (OracleCommand cmd = new OracleCommand(SQLString, connection))
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{
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try
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{
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connection.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 (OracleException ex)
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{
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throw new Exception(ex.Message);
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}
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finally
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{
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if (connection.State != ConnectionState.Closed)
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{
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connection.Close();
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}
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}
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}
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}
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}
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public static bool Exists(string connectionString, string strOracle)
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{
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object obj = OracleHelper.GetSingle(connectionString, strOracle);
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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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/// <summary>
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/// Execute an OracleCommand (that returns no resultset) against an existing database transaction
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/// using the provided parameters.
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/// </summary>
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/// <remarks>
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/// e.g.:
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/// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders", new OracleParameter(":prodid", 24));
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/// </remarks>
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/// <param name="trans">an existing database transaction</param>
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/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
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/// <param name="commandText">the stored procedure name or PL/SQL command</param>
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/// <param name="commandParameters">an array of OracleParamters used to execute the command</param>
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/// <returns>an int representing the number of rows affected by the command</returns>
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public static int ExecuteNonQuery(OracleTransaction trans, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
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{
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OracleCommand cmd = new OracleCommand();
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PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters);
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int val = cmd.ExecuteNonQuery();
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cmd.Parameters.Clear();
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return val;
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}
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/// <summary>
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/// Execute an OracleCommand (that returns no resultset) against an existing database connection
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/// using the provided parameters.
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/// </summary>
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/// <remarks>
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/// e.g.:
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/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new OracleParameter(":prodid", 24));
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/// </remarks>
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/// <param name="conn">an existing database connection</param>
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/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
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/// <param name="commandText">the stored procedure name or PL/SQL command</param>
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/// <param name="commandParameters">an array of OracleParamters used to execute the command</param>
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/// <returns>an int representing the number of rows affected by the command</returns>
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public static int ExecuteNonQuery(OracleConnection connection, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
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{
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OracleCommand cmd = new OracleCommand();
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PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
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int val = cmd.ExecuteNonQuery();
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cmd.Parameters.Clear();
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return val;
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}
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/// <summary>
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/// Execute an OracleCommand (that returns no resultset) against an existing database connection
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/// using the provided parameters.
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/// </summary>
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/// <remarks>
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/// e.g.:
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/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new OracleParameter(":prodid", 24));
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/// </remarks>
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/// <param name="conn">an existing database connection</param>
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/// <param name="commandText">the stored procedure name or PL/SQL command</param>
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/// <returns>an int representing the number of rows affected by the command</returns>
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public static int ExecuteNonQuery(string connectionString, string cmdText)
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{
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OracleCommand cmd = new OracleCommand();
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OracleConnection connection = new OracleConnection(connectionString);
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PrepareCommand(cmd, connection, null, CommandType.Text, cmdText, null);
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int val = cmd.ExecuteNonQuery();
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cmd.Parameters.Clear();
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return val;
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}
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/// <summary>
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/// Execute a select query that will return a result set
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/// </summary>
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/// <param name="connString">Connection string</param>
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//// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
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/// <param name="commandText">the stored procedure name or PL/SQL command</param>
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/// <param name="commandParameters">an array of OracleParamters used to execute the command</param>
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/// <returns></returns>
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public static OracleDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
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{
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OracleCommand cmd = new OracleCommand();
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OracleConnection conn = new OracleConnection(connectionString);
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try
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{
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//Prepare the command to execute
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PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
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LogHelper.Debug(string.Format("query oracle, conn:{0}, sql:{1}", connectionString, cmdText));
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OracleDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
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LogHelper.Debug(string.Format("query oracle end!,conn:{0}, sql:{1}", connectionString, cmdText));
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cmd.Parameters.Clear();
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return rdr;
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}
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catch
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{
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conn.Close();
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throw;
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}
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}
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/// <summary>
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/// Execute an OracleCommand that returns the first column of the first record against the database specified in the connection string
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/// using the provided parameters.
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/// </summary>
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/// <remarks>
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/// e.g.:
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/// Object obj = ExecuteScalar(connString, CommandType.StoredProcedure, "PublishOrders", new OracleParameter(":prodid", 24));
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/// </remarks>
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/// <param name="connectionString">a valid connection string for a SqlConnection</param>
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/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
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/// <param name="commandText">the stored procedure name or PL/SQL command</param>
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/// <param name="commandParameters">an array of OracleParamters used to execute the command</param>
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/// <returns>An object that should be converted to the expected type using Convert.To{Type}</returns>
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public static object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
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{
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OracleCommand cmd = new OracleCommand();
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using (OracleConnection conn = new OracleConnection(connectionString))
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{
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PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
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object val = cmd.ExecuteScalar();
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cmd.Parameters.Clear();
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return val;
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}
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}
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/// <summary>
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/// Execute a OracleCommand (that returns a 1x1 resultset) against the specified SqlTransaction
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/// using the provided parameters.
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/// </summary>
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/// <param name="transaction">A valid SqlTransaction</param>
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/// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
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/// <param name="commandText">The stored procedure name or PL/SQL command</param>
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/// <param name="commandParameters">An array of OracleParamters used to execute the command</param>
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/// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
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public static object ExecuteScalar(OracleTransaction transaction, CommandType commandType, string commandText, params OracleParameter[] commandParameters)
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{
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if (transaction == null)
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throw new ArgumentNullException("transaction");
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if (transaction != null && transaction.Connection == null)
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throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
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// Create a command and prepare it for execution
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OracleCommand cmd = new OracleCommand();
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PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters);
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// Execute the command & return the results
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object retval = cmd.ExecuteScalar();
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// Detach the SqlParameters from the command object, so they can be used again
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cmd.Parameters.Clear();
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return retval;
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}
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/// <summary>
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/// Execute an OracleCommand that returns the first column of the first record against an existing database connection
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/// using the provided parameters.
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/// </summary>
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/// <remarks>
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/// e.g.:
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/// Object obj = ExecuteScalar(conn, CommandType.StoredProcedure, "PublishOrders", new OracleParameter(":prodid", 24));
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/// </remarks>
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/// <param name="conn">an existing database connection</param>
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/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
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/// <param name="commandText">the stored procedure name or PL/SQL command</param>
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/// <param name="commandParameters">an array of OracleParamters used to execute the command</param>
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/// <returns>An object that should be converted to the expected type using Convert.To{Type}</returns>
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public static object ExecuteScalar(OracleConnection connectionString, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
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{
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OracleCommand cmd = new OracleCommand();
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PrepareCommand(cmd, connectionString, null, cmdType, cmdText, commandParameters);
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object val = cmd.ExecuteScalar();
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cmd.Parameters.Clear();
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return val;
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}
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/// <summary>
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/// Add a set of parameters to the cached
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/// </summary>
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/// <param name="cacheKey">Key value to look up the parameters</param>
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/// <param name="commandParameters">Actual parameters to cached</param>
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public static void CacheParameters(string cacheKey, params OracleParameter[] commandParameters)
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{
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parmCache[cacheKey] = commandParameters;
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}
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/// <summary>
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/// Internal function to prepare a command for execution by the database
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/// </summary>
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/// <param name="cmd">Existing command object</param>
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/// <param name="conn">Database connection object</param>
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/// <param name="trans">Optional transaction object</param>
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/// <param name="cmdType">Command type, e.g. stored procedure</param>
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/// <param name="cmdText">Command test</param>
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/// <param name="commandParameters">Parameters for the command</param>
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private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, CommandType cmdType, string cmdText, OracleParameter[] commandParameters)
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{
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//Open the connection if required
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if (conn.State != ConnectionState.Open)
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conn.Open();
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//Set up the command
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cmd.Connection = conn;
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cmd.CommandText = cmdText;
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cmd.CommandType = cmdType;
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//Bind it to the transaction if it exists
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if (trans != null)
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cmd.Transaction = trans;
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// Bind the parameters passed in
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if (commandParameters != null)
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{
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foreach (OracleParameter parm in commandParameters)
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cmd.Parameters.Add(parm);
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}
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}
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/// <summary>
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/// Converter to use boolean data type with Oracle
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/// </summary>
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/// <param name="value">Value to convert</param>
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/// <returns></returns>
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public static string OraBit(bool value)
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{
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if (value)
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return "Y";
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else
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return "N";
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}
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/// <summary>
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/// Converter to use boolean data type with Oracle
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/// </summary>
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/// <param name="value">Value to convert</param>
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/// <returns></returns>
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public static bool OraBool(string value)
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{
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if (value.Equals("Y"))
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return true;
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else
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return false;
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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(string conStr, List<String> SQLStringList)
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{
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using (OracleConnection conn = new OracleConnection(conStr))
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{
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conn.Open();
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OracleCommand cmd = new OracleCommand();
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cmd.Connection = conn;
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OracleTransaction tx = conn.BeginTransaction();
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cmd.Transaction = tx;
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try
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{
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foreach (string sql in SQLStringList)
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{
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if (!String.IsNullOrEmpty(sql))
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{
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cmd.CommandText = sql;
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cmd.ExecuteNonQuery();
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}
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}
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tx.Commit();
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}
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catch (System.Data.OracleClient.OracleException 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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finally
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{
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if (conn.State != ConnectionState.Closed)
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{
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conn.Close();
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}
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}
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}
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}
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}
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}
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