OracleCommand Class

Definition

Represents an SQL statement or stored procedure to execute against a database. This class cannot be inherited.

[System.Obsolete("OracleCommand has been deprecated. http://go.microsoft.com/fwlink/?LinkID=144260", false)]
public sealed class OracleCommand : System.Data.Common.DbCommand, ICloneable
Inheritance
Attributes
Implements

Inherited Members

System.ComponentModel.Component

System.Data.Common.DbCommand

System.MarshalByRefObject

System.Object

Examples

The following example uses the ExecuteReader method of OracleCommand, along with OracleDataReader and OracleConnection, to select rows from a table.

public void ReadMyData(string connectionString)
{
    string queryString = "SELECT EmpNo, DeptNo FROM Scott.Emp";
    using (OracleConnection connection = new OracleConnection(connectionString))
    {
        OracleCommand command = new OracleCommand(queryString, connection);
        connection.Open();
        OracleDataReader reader = command.ExecuteReader();
        try
        {
            while (reader.Read())
            {
                Console.WriteLine(reader.GetInt32(0) + ", " + reader.GetInt32(1));
            }
        }
        finally
        {
            // always call Close when done reading.
            reader.Close();
        }
    }
}
Public Sub ReadMyData(ByVal connectionString As String)
    Dim queryString As String = "SELECT EmpNo, DeptNo FROM Scott.Emp"
    Using connection As New OracleConnection(connectionString)
        Dim command As New OracleCommand(queryString, connection)
        connection.Open()
        Dim reader As OracleDataReader = command.ExecuteReader()
        Try
            While reader.Read()
                Console.WriteLine(reader.GetInt32(0) & ", " _
                   & reader.GetInt32(1))
            End While
        Finally
            ' always call Close when done reading.
            reader.Close()
        End Try
    End Using
End Sub

Remarks

This type is deprecated and will be removed in a future version of the .NET Framework. For more information, see Oracle and ADO.NET.

The OracleCommand class provides the following methods for executing commands against a data source:

Item Description
ExecuteReader Executes commands that return rows.
ExecuteOracleNonQuery Executes an SQL statement against the Connection and returns the number of rows affected.
ExecuteNonQuery Executes commands such as SQL INSERT, DELETE, UPDATE, and SET statements.
ExecuteScalar Retrieves a single value (for example, an aggregate value) from a database as a .NET Framework data type.
ExecuteOracleScalar Retrieves a single value (for example, an aggregate value) from a database as an Oracle-specific data type.

You can reset the CommandText property and reuse the OracleCommand object.

If execution of the command results in a fatal OracleException, the OracleConnection may close. However, the user can reopen the connection and continue.

Note

Unlike the Command object in the other .NET Framework data providers (SQL Server, OLE DB, and ODBC), the OracleCommand object does not support a CommandTimeout property. Setting a command timeout has no effect and the value returned is always zero.

Constructors

OracleCommand()

Initializes a new instance of the OracleCommand.

OracleCommand(String)

Initializes a new instance of the OracleCommand class with the text of the query.

OracleCommand(String, OracleConnection)

Initializes a new instance of the OracleCommand class with the text of the query and an OracleConnection object.

OracleCommand(String, OracleConnection, OracleTransaction)

Initializes a new instance of the OracleCommand class with the text of the query, an OracleConnection object, and an OracleTransaction.

Properties

CommandText

Gets or sets the SQL statement or stored procedure to execute against the database.

CommandTimeout

Gets or sets the wait time before terminating the attempt to execute a command and generating an error.

CommandType

Gets or sets a value indicating how the CommandText property is interpreted.

Connection

Gets or sets the OracleConnection used by this instance of the OracleCommand.

DesignTimeVisible

Gets or sets a value indicating whether the command object should be visible in a customized interface control.

Parameters

Gets the OracleParameterCollection.

Transaction

Gets or sets the OracleTransaction within which the OracleCommand executes.

UpdatedRowSource

Gets or sets a value that specifies how the Update method should apply command results to the DataRow.

Methods

Cancel()

Attempts to cancel the execution of an OracleCommand.

Clone()

Creates a copy of this OracleCommand object.

CreateParameter()

Creates a new instance of an OracleParameter object.

ExecuteNonQuery()

Executes an SQL statement against the Connection and returns the number of rows affected.

ExecuteOracleNonQuery(OracleString)

Executes an SQL statement against the Connection and returns the number of rows affected.

ExecuteOracleScalar()

Executes the query, and returns the first column of the first row in the result set returned by the query as an Oracle-specific data type. Extra columns or rows are ignored.

ExecuteReader()

Sends the CommandText to the Connection and builds an OracleDataReader.

ExecuteReader(CommandBehavior)

Sends the CommandText to the Connection, and builds an OracleDataReader using one of the CommandBehavior values.

ExecuteScalar()

Executes the query, and returns the first column of the first row in the result set returned by the query as a .NET Framework data type. Extra columns or rows are ignored.

Prepare()

Creates a prepared (or compiled) version of the command at the data source.

ResetCommandTimeout()

Resets the CommandTimeout property to the default value.