分享一个oraclehelper

分享一个拿即用的oraclehelper

首先要引用本机中的oralce access,如果是64位的话,也必须是64位运行,不然会报连接为空connection 等于null.

using Oracle.DataAccess;
using Oracle.DataAccess.Client;

　　

public class OraHelper
    {

        public static string connectionString;
        private static OracleConnection conn;

        static OraHelper()
        {
            connectionString = System.Configuration.ConfigurationSettings.AppSettings["ConnetionString"].ToString();//读取app.cofig中的数据库配置
            
            conn = new OracleConnection(connectionString);
        }

        /// <summary>
        /// 获取默认的连接
        /// </summary>
        /// <returns></returns>
        public static OracleConnection GetConnection()
        {
            return conn;
        }

        /// <summary>
        /// 创建新的连接(用于事务操作)
        /// </summary>
        /// <returns></returns>
        public static OracleConnection CreateConnection()
        {
            return new OracleConnection(connectionString);
        }

        public static bool ConnectionTest()
        {
            bool ret = false;
            try
            {
                conn.Open();
                ret = true;
            }
            catch { ret = false; }
            finally { conn.Close(); }
            return ret;
        }

        public static int ExecuteNonQuery(CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
        {
            int val = 0;
            OracleCommand cmd = new OracleCommand();
            PrepareCommand(cmd, null, cmdType, cmdText, commandParameters);
            try
            {
                val = cmd.ExecuteNonQuery();
            }
            catch { val = -1; }
            finally
            {
                cmd.Parameters.Clear();
                conn.Close();
            }
            return val;
        }

        public static int ExecuteNonQuery(string cmdText)
        {
            return ExecuteNonQuery(CommandType.Text, cmdText);
        }

        public static int ExecuteNonQuery(string cmdText, params OracleParameter[] commandParameters)
        {
            return ExecuteNonQuery(CommandType.Text, cmdText, commandParameters);
        }

        /// <summary>
        /// 以事务的方式执行(多用于多条SQL语句执行)
        /// </summary>
        public static int ExecuteNonQueryByTransaction(string cmdText, params OracleParameter[] commandParameters)
        {
            int val = 0;
            OracleCommand cmd = new OracleCommand();
            OracleTransaction trans = conn.BeginTransaction();
            PrepareCommand(cmd, trans, CommandType.Text, cmdText, commandParameters);
            try
            {
                val = cmd.ExecuteNonQuery();
                trans.Commit();
            }
            catch
            {
                val = -1;
                trans.Rollback();
            }
            finally
            {
                cmd.Parameters.Clear();
                conn.Close();
            }
            return val;
        }

        public static int ExecuteNonQuery(OracleTransaction trans, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
        {
            int val = 0;
            OracleCommand cmd = new OracleCommand();
            PrepareCommand(cmd, trans, cmdType, cmdText, commandParameters);
            try
            {
                val = cmd.ExecuteNonQuery();
            }
            catch
            {
                val = -1;
            }
            finally
            {
                cmd.Parameters.Clear();
            }
            return val;
        }

        public static OracleDataReader ExecuteReader(CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
        {
            OracleDataReader rdr;
            OracleCommand cmd = new OracleCommand();
            try
            {
                PrepareCommand(cmd, null, cmdType, cmdText, commandParameters);
                rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                cmd.Parameters.Clear();
            }
            catch { rdr = null; }
            finally
            {
                cmd.Parameters.Clear();
                conn.Close();
            }
            return rdr;
        }

        public static DataTable ExecuteDataTable(string cmdText)
        {
            DataTable dt = new DataTable();
            OracleCommand cmd = new OracleCommand();
            PrepareCommand(cmd, null, CommandType.Text, cmdText);
            try
            {
                OracleDataAdapter adapter = new OracleDataAdapter(cmd);
                DataSet ds = new DataSet();
                adapter.Fill(ds);
                if (ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
                    dt = ds.Tables[0];
                else
                    dt = null;
            }
            catch { dt = null; }
            finally { conn.Close(); }
            return dt;
        }

        public static DataTable ExecuteDataTable(string cmdText, params OracleParameter[] commandParameters)
        {
            DataTable dt = new DataTable();
            OracleCommand cmd = new OracleCommand();
            PrepareCommand(cmd, null, CommandType.Text, cmdText, commandParameters);
            try
            {
                OracleDataAdapter adapter = new OracleDataAdapter(cmd);
                DataSet ds = new DataSet();
                adapter.Fill(ds);
                if (ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
                    dt = ds.Tables[0];
                else
                    dt = null;
            }
            catch { dt = null; }
            finally { conn.Close(); }
            return dt;
        }

        public static DataTable ExecuteDataTable(CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
        {
            DataTable dt = new DataTable();
            OracleCommand cmd = new OracleCommand();
            PrepareCommand(cmd, null, cmdType, cmdText, commandParameters);
            try
            {
                OracleDataAdapter adapter = new OracleDataAdapter(cmd);
                DataSet ds = new DataSet();
                adapter.Fill(ds);
                if (ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
                    dt = ds.Tables[0];
                else
                    dt = null;
            }
            catch { dt = null; }
            finally { conn.Close(); }
            return dt;
        }

        public static DataSet ExecuteDataSet(string cmdText)
        {
            DataSet ds = new DataSet();
            OracleCommand cmd = new OracleCommand();
            PrepareCommand(cmd, null, CommandType.Text, cmdText);
            try
            {
                OracleDataAdapter adapter = new OracleDataAdapter(cmd);
                adapter.Fill(ds);
            }
            catch { ds = null; }
            finally { conn.Close(); }
            if (ds == null || ds.Tables.Count == 0 || ds.Tables[0].Rows.Count == 0) return null;
            else return ds;
        }

        public static DataSet ExecuteDataSet(string cmdText, params OracleParameter[] commandParameters)
        {
            DataSet ds = new DataSet();
            OracleCommand cmd = new OracleCommand();
            PrepareCommand(cmd, null, CommandType.Text, cmdText, commandParameters);
            try
            {
                OracleDataAdapter adapter = new OracleDataAdapter(cmd);
                adapter.Fill(ds);
            }
            catch { ds = null; }
            finally { conn.Close(); }
            if (ds == null || ds.Tables.Count == 0 || ds.Tables[0].Rows.Count == 0) return null;
            else return ds;
        }

        public static DataSet ExecuteDataSet(CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
        {
            DataSet ds = new DataSet();
            OracleCommand cmd = new OracleCommand();
            PrepareCommand(cmd, null, cmdType, cmdText, commandParameters);
            try
            {
                OracleDataAdapter adapter = new OracleDataAdapter(cmd);
                adapter.Fill(ds);
            }
            catch { ds = null; }
            finally { conn.Close(); }
            if (ds == null || ds.Tables.Count == 0 || ds.Tables[0].Rows.Count == 0) return null;
            else return ds;
        }

        public static object ExecuteScalar(string cmdText)
        {
            return ExecuteScalar(CommandType.Text, cmdText);
        }

        public static object ExecuteScalar(string cmdText, params OracleParameter[] commandParameters)
        {
            return ExecuteScalar(CommandType.Text, cmdText, commandParameters);
        }

        public static object ExecuteScalar(CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
        {
            object val = null;
            OracleCommand cmd = new OracleCommand();
            PrepareCommand(cmd, null, cmdType, cmdText, commandParameters);
            try
            {
                val = cmd.ExecuteScalar();
            }
            catch { val = null; }
            finally
            {
                cmd.Parameters.Clear();
                conn.Close();
            }
            return val;
        }

        private static void PrepareCommand(OracleCommand cmd, OracleTransaction trans, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
        {
            if (trans != null)
            {
                if (trans.Connection.State != ConnectionState.Open)
                    trans.Connection.Open();
                cmd.Connection = trans.Connection;
            }
            else
            {
                if (conn.State != ConnectionState.Open)
                    conn.Open();
                cmd.Connection = conn;
            }
            cmd.CommandText = cmdText;
            cmd.CommandType = cmdType;
            if (cmdParms != null)
            {
                foreach (OracleParameter parm in cmdParms)
                    cmd.Parameters.Add(parm);
            }
        }
    }

　　在app.config中添加oracle 的连接,代码如下:

<configuration>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
    </startup>
  <appSettings>
    <add key="ConnetionString" value="data source=192.168.0.2/orcl;user id=TEST;password=123456;persist security info=False;Pooling=False"/>
  </appSettings>
</configuration>