using System.Collections; using System.Collections.Generic; using UnityEngine; using Oracle.ManagedDataAccess.Client; using System.Data; using System; public class OrcaleAccess {public static OracleConnection dbConnection;static string host = "訪問(wèn)地址";static string database = "數(shù)據(jù)庫(kù)名";static string id = "賬戶";static string pwd = "密碼";public OrcaleAccess(){OpenSql();}public static void OpenSql(){try{string connectionString = string.Format("User ID={0};Password={1};Data Source=(DESCRIPTION = (ADDRESS_LIST= (ADDRESS = (PROTOCOL = TCP)(HOST = {2})(PORT = {3}))) (CONNECT_DATA =(SERVICE_NAME = {4})))", id, pwd, host, "1521", database);dbConnection = new OracleConnection(connectionString);dbConnection.Open();}catch (Exception e){throw new Exception("服務(wù)器連接失敗，請(qǐng)重新檢查是否打開(kāi)Orcale服務(wù)。" + e.Message.ToString());}}/// <summary>/// 關(guān)閉數(shù)據(jù)庫(kù)/// </summary>public void Close(){if (dbConnection != null){dbConnection.Close();dbConnection.Dispose();dbConnection = null;}}/// <summary>/// 返回表的查詢結(jié)果/// </summary>/// <returns>The all.</returns>/// <param name="Name">Name.</param>public OracleDataReader SelectAll(string Name){string query = "select * from " + " " + Name;return ExecuteQuery(query);}/// <summary>/// 條件查找/// </summary>/// <returns>The where.</returns>/// <param name="tableName">表名</param>/// <param name="items">選擇的字段</param>/// <param name="col">查找根據(jù)的字段</param>/// <param name="operation">查找根據(jù)的運(yùn)算符</param>/// <param name="values">查找根據(jù)的值</param>public OracleDataReader SelectWhere(string tableName, string[] items, string[] col, string[] operation, string[] values){if (col.Length != operation.Length || operation.Length != values.Length){throw new Exception("col.Length != operation.Length != values.Length");}string query = "SELECT " + items[0];for (int i = 1; i < items.Length; ++i){query += ", " + items[i];}query += " FROM " + tableName + " WHERE " + col[0] + operation[0] + "'" + values[0] + "' ";for (int i = 1; i < col.Length; ++i){query += " AND " + col[i] + operation[i] + "'" + values[0] + "' ";}return ExecuteQuery(query);}/// <summary>/// eg：根據(jù)時(shí)間段查找/// </summary>/// <param name="tableName"></param>/// <param name="items"></param>/// <param name="col"></param>/// <param name="old"></param>/// <param name="latter"></param>/// <param name="uuid"></param>/// <returns></returns>public OracleDataReader SelectTimeWhere(string tableName, string[] items, string[] col, string[] old, string[] latter , string uuid){string query = "SELECT " + items[0];for (int i = 1; i < items.Length; ++i){query += ", " + items[i];}query += " FROM " + tableName + " WHERE " + col[0]+" BETWEEN TO_DATE ( "+ "'" + old[0] + "' ,"+ " '" + "yyyy-MM-dd HH24:mi:ss" + "' " + ") AND TO_DATE (" + " '" + latter[0] + "' ,"+ " '" + "yyyy-MM-dd HH24:mi:ss " + "' )" + " AND "+ " UUID = "+ " '" + uuid + "' ";return ExecuteQuery(query);}/// <summary>/// 返回檢索結(jié)果/// </summary>/// <returns>The query.</returns>/// <param name="sqlString">Sql string.</param>public static OracleDataReader ExecuteQuery(string sqlString){if (dbConnection.State == ConnectionState.Open){OracleDataReader dr = null; //表的集合try{OracleCommand cmd = new OracleCommand(sqlString, dbConnection);dr = cmd.ExecuteReader();}catch (Exception ee){throw new Exception("SQL:" + sqlString + "/n" + ee.Message.ToString());}finally{}return dr;}return null;}}

OrcaleAccess

注意：使用時(shí)必須包含Oracle.ManagedDataAccess.dll，System.Data.dll。

private void SelectRealTime(){OrcaleAccess orcale = new OrcaleAccess();OracleDataReader od = orcale.SelectAll("表名");while (od.Read()){RealTime ele = new RealTime();ele.RealTime_TIME = od["TIME"].ToString();realtimeTable.Add(ele);}orcale.Close();}使用案例

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