清除devart中的连接池？答案

【问题标题】：Clear connection pooling in devart?清除devart中的连接池？
【发布时间】：2019-04-03 06:32:37
【问题描述】：

我有一个 Windows 服务应用程序，每分钟连接一次数据库。有时我会收到此错误：

ORA-20110: ORA-06508: PL/SQL: 找不到被调用的程序单元

解决方案已关闭并在 plsql 中重新连接数据库，但我想在应用程序端执行此操作。

所以我需要禁用所有连接池并尝试重新连接数据库。我如何使用 devart 做到这一点？

这是我的连接

this.ConnectMode = OracleConnectMode.Default;
this.Direct = true;
this.Close();
this.Server = ConfigurationManager.AppSettings["db_hostname"];
this.Port = Convert.ToInt32(ConfigurationManager.AppSettings["db_port"]);
if (db_connection_type == "SID")
   this.Sid = ConfigurationManager.AppSettings["db_sid"];
else
   this.ServiceName = ConfigurationManager.AppSettings["db_sid"];
this.UserId = db_username;
this.Password = db_password;
this.Open();

【问题讨论】：

标签： c# oracle database-connection connection-pooling devart

【解决方案1】：

我找到了oracleconnection ownclass的clearPool

// C#
// Sample demonstrating the use of ClearPool API in OracleConnection class

using System;
using Oracle.DataAccess.Client;

class ClearPoolSample
{
  static void Main()
  {
    Console.WriteLine("Running ClearPool sample..." );
    // Set the connection string
    string strConn = "User Id=scott;Password=tiger;Data Source=oracle;" +
                     "Min pool size=5;";
    OracleConnection conn = new OracleConnection(strConn);

    // Open the connection
    conn.Open();

    // Clears the connection pool associated with connection 'conn'
    OracleConnection.ClearPool (conn);

    // This connection will be placed back into the pool
    conn.Close ();

    // Open the connection again to create additional connections in the pool
    conn.Open();

    // Create a new connection object
    OracleConnection connNew = new OracleConnection(strConn);

    // Clears the pool associated with Connection 'connNew'
    // Since the same connection string is set for both the connections,
    // connNew and conn, they will be part of the same connection pool.
    // We need not do an Open() on the connection object before calling
    // ClearPool
    OracleConnection.ClearPool (connNew);

    // cleanup
    conn.Close();
    Console.WriteLine("Done!");
  }
}

【讨论】：