（转）OraDBHelper.cs asp.net 通用oracle数据库读写类
Web.config配置文件中节点
<connectionStrings>
<add name="ConnectionString" connectionString="Data Source=jde;Persist Security Info=True;User ID=jde;Password=jde;Unicode=True" providerName="System.Data.OracleClient"/>
</connectionStrings>
以上是oracle数据库的连接字符串
name：连接字符串名
connectionString：连接字符串
Data Souuce：本地机：就是数据库名；远程机子：如果在本地装有oracle数据库的客户端则也是数据库名，否则参考网络资源要加一个域。
User ID：用户名
OraDBHelper.cs文件
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using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.OracleClient;
/// <summary>
///OraDBHelper 的摘要说明
/// </summary>
public class OraDBHelper
{
public static OracleCommand cmd = null;
public static OracleConnection conn = null;
public static string connstr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
public OraDBHelper()
{ }
#region 建立数据库连接对象
/// <summary>
/// 建立数据库连接
/// </summary>
/// <returns>返回一个数据库的连接OracleConnection对象</returns>
public static OracleConnection init()
{
try
{
conn = new OracleConnection(connstr);
if (conn.State != ConnectionState.Open)
{
conn.Open();
}
}
catch (Exception e)
{
throw new Exception(e.Message.ToString());
}
return conn;
}
#endregion
#region 设置OracleCommand对象
/// <summary>
/// 设置OracleCommand对象
/// </summary>
/// <param name="cmd">OracleCommand对象 </param>
/// <param name="cmdText">命令文本</param>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdParms">参数集合</param>
private static void SetCommand(OracleCommand cmd, string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
{
cmd.Connection = conn;
cmd.CommandText = cmdText;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
cmd.Parameters.AddRange(cmdParms);
}
}
#endregion
#region 执行相应的sql语句，返回相应的DataSet对象
/// <summary>
/// 执行相应的sql语句，返回相应的DataSet对象
/// </summary>
/// <param name="sqlstr">sql语句</param>
/// <returns>返回相应的DataSet对象</returns>
public static DataSet GetDataSet(string sqlstr)
{
DataSet set = new DataSet();
try
{
init();
OracleDataAdapter adp = new OracleDataAdapter(sqlstr, conn);
adp.Fill(set);
conn.Close();
}
catch (Exception e)
{
throw new Exception(e.Message.ToString());
}
return set;
}
#endregion
#region 执行相应的sql语句，返回相应的DataSet对象
/// <summary>
/// 执行相应的sql语句，返回相应的DataSet对象
/// </summary>
/// <param name="sqlstr">sql语句</param>
/// <param name="tableName">表名</param>
/// <returns>返回相应的DataSet对象</returns>
public static DataSet GetDataSet(string sqlstr, string tableName)
{
DataSet set = new DataSet();
try
{
init();
OracleDataAdapter adp = new OracleDataAdapter(sqlstr, conn);
adp.Fill(set, tableName);
conn.Close();
}
catch (Exception e)
{
throw new Exception(e.Message.ToString());
}
return set;
}
#endregion
#region 执行不带参数sql语句，返回所影响的行数
/// <summary>
/// 执行不带参数sql语句，返回所影响的行数
/// </summary>
/// <param name="cmdstr">增，删，改sql语句</param>
/// <returns>返回所影响的行数</returns>
public static int ExecuteNonQuery(string cmdText)
{
int count;
try
{
init();
cmd = new OracleCommand(cmdText, conn);
count = cmd.ExecuteNonQuery();
conn.Close();
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return count;
}
#endregion
#region 执行带参数sql语句或存储过程，返回所影响的行数
/// <summary>
/// 执行带参数sql语句或存储过程，返回所影响的行数
/// </summary>
/// <param name="cmdText">带参数的sql语句和存储过程名</param>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdParms">参数集合</param>
/// <returns>返回所影响的行数</returns>
public static int ExecuteNonQuery(string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
{
int count;
try
{
init();
cmd = new OracleCommand();
SetCommand(cmd, cmdText, cmdType, cmdParms);
count = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
conn.Close();
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return count;
}
#endregion
#region 执行不带参数sql语句，返回一个从数据源读取数据的OracleDataReader对象
/// <summary>
/// 执行不带参数sql语句，返回一个从数据源读取数据的OracleDataReader对象
/// </summary>
/// <param name="cmdstr">相应的sql语句</param>
/// <returns>返回一个从数据源读取数据的OracleDataReader对象</returns>
public static OracleDataReader ExecuteReader(string cmdText)
{
OracleDataReader reader;
try
{
init();
cmd = new OracleCommand(cmdText, conn);
reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return reader;
}
#endregion
#region 执行带参数的sql语句或存储过程，返回一个从数据源读取数据的OracleDataReader对象
/// <summary>
/// 执行带参数的sql语句或存储过程，返回一个从数据源读取数据的OracleDataReader对象
/// </summary>
/// <param name="cmdText">sql语句或存储过程名</param>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdParms">参数集合</param>
/// <returns>返回一个从数据源读取数据的OracleDataReader对象</returns>
public static OracleDataReader ExecuteReader(string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
{
OracleDataReader reader;
try
{
init();
cmd = new OracleCommand();
SetCommand(cmd, cmdText, cmdType, cmdParms);
reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return reader;
}
#endregion
#region 执行不带参数sql语句,返回结果集首行首列的值object
/// <summary>
/// 执行不带参数sql语句,返回结果集首行首列的值object
/// </summary>
/// <param name="cmdstr">相应的sql语句</param>
/// <returns>返回结果集首行首列的值object</returns>
public static object ExecuteScalar(string cmdText)
{
object obj;
try
{
init();
cmd = new OracleCommand(cmdText, conn);
obj = cmd.ExecuteScalar();
conn.Close();
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return obj;
}
#endregion
#region 执行带参数sql语句或存储过程,返回结果集首行首列的值object
/// <summary>
/// 执行带参数sql语句或存储过程,返回结果集首行首列的值object
/// </summary>
/// <param name="cmdText">sql语句或存储过程名</param>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdParms">返回结果集首行首列的值object</param>
/// <returns></returns>
public static object ExecuteScalar(string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
{
object obj;
try
{
init();
cmd = new OracleCommand();
SetCommand(cmd, cmdText, cmdType, cmdParms);
obj = cmd.ExecuteScalar();
conn.Close();
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return obj;
}
#endregion
}
这是oracle数据库的一个DBHelp类，方法参考来源于网络
