oracle 连接字符串

<connectionStrings>

<add name="chrsym" connectionString="Data Source=192.168.1.10;UID=user;PWD=888888;DATABASE="data" providerName="System.Data.SqlClient"/>

<add name="oracle" connectionString="User ID=cs;Password=cs;Data Source=(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST=192.168.1.10)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=cs)))" providerName="System.Data.OracleClient"/>

</connectionStrings>

.net 中引用 System.Data.OracleClient;

using System.Data;
using System.Data.OracleClient;
using System.Configuration;
using System.Collections;

namespace Entity
{
/// <summary>
/// 操作Oracle数据库
/// </summary>

public class OracleHelper
{
public OracleConnection conn = new OracleConnection();//连接对象
protected OracleCommand cmd = new OracleCommand();  //命令对象
// Read the connection strings from the configuration file
//public readonly string ConnectionStringLocalTransaction = ConfigurationManager.ConnectionStrings["OraConnString1"].ConnectionString;
//public readonly string ConnectionStringInventoryDistributedTransaction = ConfigurationManager.ConnectionStrings["OraConnString2"].ConnectionString;
//public readonly string ConnectionStringOrderDistributedTransaction = ConfigurationManager.ConnectionStrings["OraConnString3"].ConnectionString;
//public readonly string ConnectionStringProfile = ConfigurationManager.ConnectionStrings["OraProfileConnString"].ConnectionString;
//public readonly string ConnectionStringMembership = ConfigurationManager.ConnectionStrings["OraMembershipConnString"].ConnectionString;

//Create a hashtable for the parameter cached
private Hashtable parmCache = Hashtable.Synchronized(new Hashtable());
protected readonly string ConnectStr = ConfigurationManager.ConnectionStrings["oracle"].ToString();

public OracleHelper()
{

}

public bool OpenDB()
{
try
{
conn.ConnectionString = ConnectStr;
cmd.Connection = conn;
conn.Open();
return true;
}
catch
{
return false;
}
}

public bool CloseDB()
{
try
{
if (conn.State == ConnectionState.Open)
{
conn.Close();
conn.Dispose();
cmd.Dispose();
}
return true;
}
catch
{
return false;
}
}

/**/
/**/
/**/
/// <summary>
/// Execute a database query which does not include a select
/// </summary>
/// <param name="cmdType">Command type either stored procedure or SQL</param>
/// <param name="cmdText">Acutall SQL Command</param>
/// <param name="commandParameters">Parameters to bind to the command</param>
/// <returns></returns>
public int ExecuteNonQuery(CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
{
try
{
PrepareCommand(null, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
finally
{
CloseDB();
}
}

/**/
/**/
/**/
/// <summary>
/// Execute a select query that will return a result set
/// </summary>
/// <param name="connString">Connection string</param>
//// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <param name="commandParameters">an array of OracleParamters used to execute the command</param>
/// <returns></returns>
public OracleDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
{
try
{
//Prepare the command to execute
PrepareCommand(null, cmdType, cmdText, commandParameters);
OracleDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return rdr;
}
catch
{
conn.Close();
throw;
}
finally
{

}
}

/**/
/**/
/**/
/// <summary>
/// Execute an OracleCommand that returns the first column of the first record against the database specified in the connection string
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
///  Object obj = ExecuteScalar(CommandType.StoredProcedure, "PublishOrders", new OracleParameter(":prodid", 24));
/// </remarks>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or PL/SQL command</param>
/// <param name="commandParameters">an array of OracleParamters used to execute the command</param>
/// <returns>An object that should be converted to the expected type using Convert.To{Type}</returns>
public object ExecuteScalar(CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
{
try
{
PrepareCommand(null, cmdType, cmdText, commandParameters);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
finally
{
CloseDB();
}
}

/// <summary>
/// 执行一条返回结果集的SqlCommand命令，通过已有的连接字符串。
/// 使用参数数组提供参数
/// </summary>
/// <remarks>
/// 使用示例：
/// DateSet ds = ExecuteDataSet(CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="cmdType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
/// <param name="cmdText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个包含结果的DataSet</returns>
public DataSet ExecuteDataSet(CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
{
try
{
PrepareCommand(null, cmdType, cmdText, commandParameters);
OracleDataAdapter adapter = new OracleDataAdapter(cmd);
DataSet ds = new DataSet();
adapter.Fill(ds);
return ds;
}
finally
{
cmd.Parameters.Clear();
CloseDB();
}
}

/**/
/**/
/**/
/// <summary>
/// Add a set of parameters to the cached
/// </summary>
/// <param name="cacheKey">Key value to look up the parameters</param>
/// <param name="commandParameters">Actual parameters to cached</param>
public void CacheParameters(string cacheKey, params OracleParameter[] commandParameters)
{
parmCache[cacheKey] = commandParameters;
}

/**/
/**/
/**/
/// <summary>
/// Fetch parameters from the cache
/// </summary>
/// <param name="cacheKey">Key to look up the parameters</param>
/// <returns></returns>
public OracleParameter[] GetCachedParameters(string cacheKey)
{
OracleParameter[] cachedParms = (OracleParameter[])parmCache[cacheKey];

if (cachedParms == null)
return null;

// If the parameters are in the cache
OracleParameter[] clonedParms = new OracleParameter[cachedParms.Length];

// return a copy of the parameters
for (int i = 0, j = cachedParms.Length; i < j; i++)
clonedParms[i] = (OracleParameter)((ICloneable)cachedParms[i]).Clone();

return clonedParms;
}

/**/
/**/
/**/
/// <summary>
/// Internal function to prepare a command for execution by the database
/// </summary>
/// <param name="cmd">Existing command object</param>
/// <param name="conn">Database connection object</param>
/// <param name="trans">Optional transaction object</param>
/// <param name="cmdType">Command type, e.g. stored procedure</param>
/// <param name="cmdText">Command test</param>
/// <param name="commandParameters">Parameters for the command</param>
private void PrepareCommand(OracleTransaction trans, CommandType cmdType, string cmdText, OracleParameter[] commandParameters)
{

OpenDB();
cmd.CommandText = cmdText;
cmd.CommandType = cmdType;

//Bind it to the transaction if it exists
if (trans != null)
cmd.Transaction = trans;

// Bind the parameters passed in
if (commandParameters != null)
{
foreach (OracleParameter parm in commandParameters)
cmd.Parameters.Add(parm);
}
}

/**/
/**/
/**/
/// <summary>
/// Converter to use boolean data type with Oracle
/// </summary>
/// <param name="value">Value to convert</param>
/// <returns></returns>
public string OraBit(bool value)
{
if (value)
return "Y";
else
return "N";
}

/**/
/**/
/**/
/// <summary>
/// Converter to use boolean data type with Oracle
/// </summary>
/// <param name="value">Value to convert</param>
/// <returns></returns>
public bool OraBool(string value)
{
if (value.Equals("Y"))
return true;
else
return false;
}
}
}