An OracleParameterCollection class represents a collection of all parameters relevant to an OracleCommand object and their mappings to DataSet columns.

Class Inheritance

System.Object

  System.MarshalByRefObject

    System.Data.Common.DbParameterCollection

      Oracle.DataAccess.Client.OracleParameterCollection

Declaration

// C#
public sealed class OracleParameterCollection : DbParameterCollection, 
    IDataParameterCollection, IList, ICollection, IEnumerable

Requirements

Thread Safety

All public static methods are thread-safe, although instance methods do not guarantee thread safety.

Remarks

The position of an OracleParameter added into the OracleParameterCollection is the binding position in the SQL statement. Position is 0-based and is used only for positional binding. If named binding is used, the position of an OracleParameter in the OracleParameterCollection is ignored.

Example

// C#
 
using System;
using System.Data;
using Oracle.DataAccess.Client; 
 
class OracleParameterCollectionSample
{
  static void Main()
  {
    string constr = "User Id=scott;Password=tiger;Data Source=oracle";
    OracleConnection con = new OracleConnection(constr);
    con.Open();
 
    OracleParameter[] prm = new OracleParameter[3];
 
    // Create OracleParameter objects through OracleParameterCollection
    OracleCommand cmd = con.CreateCommand();
 
    cmd.CommandText = "select max(empno) from emp";
    int maxno = int.Parse(cmd.ExecuteScalar().ToString());
 
    prm[0] = cmd.Parameters.Add("paramEmpno", OracleDbType.Decimal, 
      maxno + 10, ParameterDirection.Input);
    prm[1] = cmd.Parameters.Add("paramEname", OracleDbType.Varchar2, 
      "Client", ParameterDirection.Input);
    prm[2] = cmd.Parameters.Add("paramDeptNo", OracleDbType.Decimal, 
      10, ParameterDirection.Input);
    cmd.CommandText = 
      "insert into emp(empno, ename, deptno) values(:1, :2, :3)";
    cmd.ExecuteNonQuery();
 
    Console.WriteLine("Record for employee id {0} has been inserted.", 
      maxno + 10);
 
    // Remove all parameters from OracleParameterCollection
    cmd.Parameters.Clear();
 
    prm[0].Dispose();
    prm[1].Dispose();
    prm[2].Dispose();
    cmd.Dispose();
 
    con.Close();
    con.Dispose();
  }
}