CSharp: Connecting to Oracle 11g Database in C#

 

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using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; //using Oracle.DataAccess.Client; using Oracle.ManagedDataAccess.Client; using Oracle.ManagedDataAccess.Types;   namespace WinOracleDemo {         /// <summary>     /// Oracle.ManagedDataAccess     /// 4.121.2.0     /// </summary>     public partial class Form1 : Form     {             /// <summary>         ///         /// </summary>         public Form1()         {             InitializeComponent();         }           /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void Form1_Load(object sender, EventArgs e)         {             OracleConnection conn = null;             try             {                 conn = OpenConn();                 var cmd = conn.CreateCommand();                 cmd.CommandText = "select * from DEPT";                 cmd.CommandType = CommandType.Text;                 var reader = cmd.ExecuteReader();                 while (reader.Read())                 {                     Console.WriteLine(string.Format("No:{0},Name:{1}", reader["DEPTNO"], reader["DNAME"]));                 }                 string sql = "select * from DEPT";                DataTable dt=OracleHelper.GetTable(sql, CommandType.Text,null);                this.dataGridView1.DataSource = dt;                  }             catch (OracleException ex)             {                 Console.WriteLine(ex.Message);             }             finally             {                 CloseConn(conn);             }             Console.Read();         }             static OracleConnection OpenConn()         {               OracleConnection conn = null;             try             {                 conn = new OracleConnection();                 conn.ConnectionString = "Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=ORCL)));Persist Security Info=True;User ID=SCOTT;Password=888888;";                 conn.Open();                               }             catch (OracleException ex) {                   Console.WriteLine(ex.Message);             }             return conn;         }           static void CloseConn(OracleConnection conn)         {             if (conn == null) { return; }             try             {                 if (conn.State != ConnectionState.Closed)                 {                     conn.Close();                 }             }             catch (OracleException e)             {                 Console.WriteLine(e.Message);             }             finally             {                 conn.Dispose();             }         }     } }

　　

 

https://www.oracle.com/database/technologies/net-downloads.html
https://github.com/oracle/dotnet-db-samples