Parameters Property (OracleCommand)

In This Topic

Gets or sets the OracleParameterCollection.

Syntax

Visual Basic
C#

'Declaration
 
Public Shadows ReadOnly Property Parameters As OracleParameterCollection

public new OracleParameterCollection Parameters {get;}

Property Value

The parameters of a SQL statement or a stored procedure. The default value is an empty collection.

Remarks

By default, you have to construct this collection and provide values for it manually. However, if you choose to use autosynchronization mode by setting ParameterCheck property to true you can have the collecton adjusted automatically. Please refer to article Using Parameters in dotConnect for Oracle for detailed information on using this mode.

Example

The following example creates a OracleConnection, OracleCommand, fills its parameters and displays them. An UPDATE statement with the parameters involved is executed then.

csharp

static void CreateCommand(OracleConnection myConnection, string mySelectQuery, OracleParameter[] myParamArray)
{
  OracleCommand myCommand = new OracleCommand(mySelectQuery, myConnection);
  string myMessage = "";
  for (int i = 0; i < myParamArray.Length; i++)
  {
    myCommand.Parameters.Add(myParamArray[i]);
    myMessage += myCommand.Parameters[i].ToString() + "\n";
  }
  Console.Write(myMessage);
  try
  {
    myConnection.Open();
    myCommand.ExecuteNonQuery();
  }
  finally
  {
    myConnection.Close();
  }
}

static void Main(string[] args)
{
  OracleParameter[] myParams = new OracleParameter[] 
    {
      new OracleParameter("DeptNo", 10),
      new OracleParameter("DName", "COUNTING")
    };
  OracleConnection myConnection1 = new OracleConnection(
      "User Id=Scott;Password=tiger;Data Source=Ora;");
  CreateCommand(myConnection1,"UPDATE Test.Dept SET DName = :DName WHERE DeptNo = :DeptNo",myParams);
}

Visual Basic

Public Sub CreateCommand(ByVal myConnection As Devart.Data.Oracle.OracleConnection, _
 ByVal mySelectQuery As String, ByVal myParamArray() As Devart.Data.Oracle.OracleParameter)
  Dim myCommand As New Devart.Data.Oracle.OracleCommand(mySelectQuery, myConnection)
  Dim myMessage As String = ""
  Dim i As Integer
  For i = 0 To (myParamArray.Length - 1)
    myCommand.Parameters.Add(myParamArray(i))
    myMessage = String.Concat(myMessage, " ", myCommand.Parameters(i).ToString())
  Next
  Console.WriteLine(myMessage)
  Try
    myConnection.Open()
    myCommand.ExecuteNonQuery()
  Finally
    myConnection.Close()
  End Try
End Sub

Sub Main()
  Dim myP1 As New Devart.Data.Oracle.OracleParameter
  myP1.ParameterName = "DeptNo"
  myP1.Value = 10
  Dim myP2 As New Devart.Data.Oracle.OracleParameter
  myP2.ParameterName = "DName"
  myP2.Value = "ACCOUNTING"
  Dim myParams(1) As Devart.Data.Oracle.OracleParameter
  myParams(0) = myP1
  myParams(1) = myP2
  Dim myConnection1 As New Devart.Data.Oracle.OracleConnection( _
      "User Id=Scott;Password=tiger;Data Source=Ora;")
  CreateCommand(myConnection1, "UPDATE Test.Dept SET DName = :DName WHERE DeptNo = :DeptNo", myParams)
End Sub

Reference

OracleCommand Class
OracleCommand Members
OracleParameter Class
CommandText Property

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