1 using System;
  2 using System.Data;
  3 using System.Configuration;
  4 using System.Web;
  5 using System.Web.Security;
  6 using System.Web.UI;
  7 using System.Web.UI.WebControls;
  8 using System.Web.UI.WebControls.WebParts;
  9 using System.Web.UI.HtmlControls;
 10 using System.Data.OracleClient;
 11 
 12 /// <summary>
 13 /// OracleHelper 的摘要说明
 14 /// </summary>
 15 public class OracleHelper
 16 {
 17     public OracleHelper()
 18     {
 19         //
 20         // TODO: 在此处添加构造函数逻辑
 21         //
 22     }
 23 
 24     private static string _connectionString = "";
 25     private static OracleConnection conn;
 26     private static OracleCommand comm;
 27     private static OracleDataAdapter adpter;
 28 
 29     /// <summary>
 30     /// 数据库联接字符串
 31     /// </summary>
 32     /// <returns></returns>
 33     public static string ConnectionString
 34     {
 35         get
 36         {
 37             if (_connectionString == "")
 38             {
 39                 //从Web.Config中获取数据库连接字符串
 40                 _connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["OracleConnectString"].ConnectionString;
 41             }
 42             return _connectionString;
 43         }
 44     }
 45 
 46     /// <summary>
 47     /// 打开数据库
 48     /// </summary>
 49     public static void OpenConnection()
 50     {
 51         conn = new OracleConnection(ConnectionString);
 52         comm = new OracleCommand();
 53         adpter = new OracleDataAdapter();
 54         comm.Connection = conn;
 55         adpter.SelectCommand = comm;
 56         comm.CommandType = CommandType.Text;
 57        
 58         try
 59         {
 60             conn.Open();
 61         }
 62         catch (Exception ex)
 63         {
 64            
 65         }
 66     }
 67 
 68     /// <summary>
 69     /// 关闭数据库
 70     /// </summary>
 71     public static void CloseConection()
 72     {
 73         if (conn.State == ConnectionState.Open)
 74             conn.Close();
 75         conn = null;
 76         comm = null;
 77         adpter = null;
 78     }
 79 
 80     /// <summary>
 81     /// 执行sql语句并填充数据集
 82     /// </summary>
 83     /// <param name="sqlstring"></param>
 84     /// <param name="dataset"></param>
 85     /// <param name="tbname"></param>
 86     /// <returns></returns>
 87     public static bool ExecuteSqlAndFillDataSet(string sqlstring, ref DataSet dataset, string tbname)
 88     {
 89         try
 90         {
 91             comm.CommandText = sqlstring;
 92             adpter.Fill(dataset,tbname);
 93         }
 94         catch(Exception ex)
 95         {
 96             return false;
 97         }
 98 
 99         return true;
100     }
101 
102     /// <summary>
103     /// 执行SQL语句
104     /// </summary>
105     /// <param name="sqlstring"></param>
106     /// <returns></returns>
107     public static bool ExecSql(string sqlstring)
108     {
109         try
110         {
111             comm.CommandText = sqlstring;
112             comm.ExecuteNonQuery();
113         }
114         catch (Exception ex)
115         {
116             return false;
117         }
118         return true;
119     }
120 
121    /// <summary>
122     /// 执行Sql，返回DataReader
123    /// </summary>
124    /// <param name="sqlstring"></param>
125    /// <returns></returns>
126  
127     public static OracleDataReader ExecQuerySql(string sqlstring)
128     {
129         try
130         {
131             comm.CommandText = sqlstring;
132             return comm.ExecuteReader();
133         }
134         catch (Exception ex)
135         {
136             return null;
137         }
138     }
139 }
140