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OracleCommand Class

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

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

public sealed class OracleCommand : DbCommand, 
	ICloneable

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.

NoteNote:

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.

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();
        }
    }
}

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1

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