Hospital/DBUtility/OracleDbHelper.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Data.OracleClient;
using System.Data;
using System.Diagnostics;
using System.Reflection;
using System.Collections;
using System.Threading;
using System.Data.Common;
using System.Configuration;

namespace Com.Jpsoft.Hospital.DBUtility
{
    /// <summary>
    /// OraOracle 的摘要说明。
    /// 参数传递是不用@改用：号
    /// </summary>
    public abstract class OracleDbHelper {
        /// <summary>
        /// 连接字符串
        /// </summary>
        public static string ConnStr = ConfigurationManager.ConnectionStrings["oralconn"].ToString();

        public OracleDbHelper()
        {
        }

        /// <summary>
        /// 执行sql语句
        /// </summary>
        /// <param name="sqlstr">查询sql语句</param>
        public static int ExecuteSql(string sqlstr) {
            LocalDataStoreSlot transDatalot = Thread.GetNamedDataSlot("transaction");
            OracleTransaction trans = (OracleTransaction)Thread.GetData(transDatalot);

            bool autoClose = false;
            OracleConnection conn = null;

            if (trans == null || trans.Connection.ConnectionString != ConnStr) {
                conn = OpenConnection() as OracleConnection;
                autoClose = true;
            }
            else {
                conn = trans.Connection;
                autoClose = false;
            }

            OracleCommand cmd = new OracleCommand(sqlstr, conn);
            cmd.CommandType = CommandType.Text;

            if (trans == null || trans.Connection.ConnectionString != ConnStr) {
                cmd.Transaction = trans;
            }

            int affectCount = 0;

            try {
                affectCount = cmd.ExecuteNonQuery();
            }
            catch (Exception ex) {
                if (trans == null || trans.Connection.ConnectionString != ConnStr) {
                    throw ex;
                }
            }
            finally {
                if (autoClose) {
                    conn.Close();
                }
            }

            return affectCount;
        }

        /// <summary>
        /// 执行sql语句，事务执行
        /// </summary>
        /// <param name="sqlstr">查询sql语句</param>
        public static int ExecuteSql(string sqlstr, IDbTransaction trans) {
            int affectCount = 0;

            OracleConnection conn = ((OracleTransaction)trans).Connection;
            OracleCommand cmd = new OracleCommand(sqlstr, conn);

            cmd.Transaction = (OracleTransaction)trans;
            cmd.CommandType = CommandType.Text;

            try {
                affectCount = cmd.ExecuteNonQuery();
                trans.Commit();
            }
            catch (Exception ex) {
                trans.Rollback();
            }

            return affectCount;
        }

        /// <summary>
        /// 判断是否存在符合条件的记录
        /// </summary>
        /// <param name="sqlstr">sql查询语句</param>
        /// <returns>是否存在</returns>
        public static bool Exists(string sqlstr) {
            OracleConnection conn = OpenConnection() as OracleConnection;

            if (conn == null) {
                return false;
            }

            OracleCommand cmd = new OracleCommand(sqlstr, conn);
            cmd.CommandType = CommandType.Text;

            int num = Convert.ToInt32(cmd.ExecuteScalar());

            conn.Close();

            if (num > 0) {
                return true;
            }
            else {
                return false;
            }
        }

        /// <summary>
        /// 获取数据表
        /// </summary>
        /// <param name="sqlstr">查询sql语句</param>
        /// <returns>返回数据表</returns>
        public static DataTable GetDataTable(string sqlstr) {
            LocalDataStoreSlot transDatalot = Thread.GetNamedDataSlot("transaction");
            OracleTransaction trans = (OracleTransaction)Thread.GetData(transDatalot);
            OracleConnection conn = null;

            bool close = false;

            if (trans == null || trans.Connection.ConnectionString != ConnStr) {
                conn = OpenConnection() as OracleConnection;
                close = true;
            }
            else {
                conn = trans.Connection;
            }

            DataTable dt = new DataTable();

            if (conn == null) {
                return null;
            }

            try {
                OracleDataAdapter adp = new OracleDataAdapter(sqlstr, conn);

                if (trans == null || trans.Connection.ConnectionString != ConnStr) {
                    adp.SelectCommand.Transaction = trans;
                }

                adp.Fill(dt);
            }
            catch (Exception ex) {
            }
            finally {
                if (close) {
                    conn.Close();
                }
            }

            return dt;
        }

        /// <summary>
        /// 打开连接
        /// </summary>
        /// <returns>返回打开的数据库连接</returns>
        public static IDbConnection OpenConnection() {
            OracleConnection sqlconn = new OracleConnection();

            sqlconn = new OracleConnection(ConnStr);
            sqlconn.Open();

            return sqlconn;
        }

        public static DataSet Query(string sqlstr) {
            LocalDataStoreSlot transDatalot = Thread.GetNamedDataSlot("transaction");
            OracleTransaction trans = (OracleTransaction)Thread.GetData(transDatalot);
            OracleConnection conn = null;

            bool close = false;

            if (trans == null || trans.Connection.ConnectionString != ConnStr) {
                conn = OpenConnection() as OracleConnection;
                close = true;
            }
            else {
                conn = trans.Connection;
            }

            DataSet ds = new DataSet();

            if (conn == null) {
                return null;
            }

            try {
                OracleDataAdapter adp = new OracleDataAdapter(sqlstr, conn);
                adp.SelectCommand.Parameters.Clear();
                adp.Fill(ds);
            }
            catch (Exception ex) {
            }
            finally {
                if (close) {
                    conn.Close();
                }
            }

            return ds;
        }
    }
}