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OdbcDataReader.Close Method

Closes the OdbcDataReader object.

Namespace:  System.Data.Odbc
Assembly:  System.Data (in System.Data.dll)

'Declaration
Public Overrides Sub Close

Implements

IDataReader.Close

You must explicitly call the Close method when you are finished using the OdbcDataReader to use the associated OdbcConnection for any other purpose.

Caution noteCaution

Do not call Close or Dispose on a Connection, a DataReader, or any other managed object in the Finalize method of your class. In a finalizer, you should only release unmanaged resources that your class owns directly. If your class does not own any unmanaged resources, do not include a Finalize method in your class definition. For more information, see Garbage Collection.

The following example creates an OdbcConnection, an OdbcCommand, and an OdbcDataReader. The example reads through the data, writing it out to the console. Finally, the example closes the OdbcDataReader, and then the OdbcConnection.

Public Sub ReadData(ByVal connectionString As String)
    Dim queryString As String = _
        "SELECT OrderID, CustomerID FROM Orders" 

    Using connection As New OracleConnection(connectionString)
        Dim command As New OracleCommand(queryString, connection)
        connection.Open()

        Dim reader As OracleDataReader
        reader = command.ExecuteReader()

        ' Always call Read before accessing data. 
        While reader.Read()
            Console.WriteLine(reader.GetInt32(0) & ", " & reader.GetString(1))
        End While 

        ' Always call Close when done reading.
        reader.Close()
    End Using 
End Sub

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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