OdbcParameter.Direction Property

Gets or sets a value that indicates whether the parameter is input-only, output-only, bidirectional, or a stored procedure return value parameter.

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

public override ParameterDirection Direction { get; set; 
/** @property */
public ParameterDirection get_Direction ()

/** @property */
public void set_Direction (ParameterDirection value)

public override function get Direction () : ParameterDirection

public override function set Direction (value : ParameterDirection)

Property Value

One of the ParameterDirection values. The default is Input.

Exception typeCondition


The property was not set to one of the valid ParameterDirection values.

If the ParameterDirection is Output, and execution of the associated OdbcCommand does not return a value, the OdbcParameter will contain a null value. Null values are handled using the DBNull class.

Output, InputOut, and ReturnValue parameters returned by calling ExecuteReader cannot be accessed until you call Close or Dispose on the OdbcDataReader.

The following example creates an OdbcParameter and sets some of its properties.

[Visual Basic]

Public Sub CreateMyProc(connection As OdbcConnection)

   Dim command As OdbcCommand = connection.CreateCommand()
   command.CommandText = “{ call MyProc(?,?,?) ”
   command.Parameters.Add("", OdbcType.Int).Value = 1
   command.Parameters.Add("", OdbcType.Decimal).Value = 2
   command.Parameters.Add("", OdbcType.Decimal).Value = 3

End Sub


public void CreateMyProc(OdbcConnection connection) 
   OdbcCommand command = connection.CreateCommand();
   command.CommandText = "{ call MyProc(?,?,?) ";
   command.Parameters.Add("", OdbcType.Int).Value = 1;
   command.Parameters.Add("", OdbcType.Decimal).Value = 2;
   command.Parameters.Add("", OdbcType.Decimal).Value = 3;

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

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

.NET Framework

Supported in: 2.0, 1.1

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