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OdbcParameter.Direction Property

Note: This namespace, class, or member is supported only in version 1.1 of the .NET Framework.

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

[Visual Basic]
Public Overridable Property Direction As ParameterDirection  _
   Implements IDataParameter.Direction
public virtual ParameterDirection Direction {get; set;}
public: __property virtual ParameterDirection get_Direction();
public: __property virtual void set_Direction(ParameterDirection);
public function get Direction() : ParameterDirection;
public function set Direction(ParameterDirection);

Property Value

One of the ParameterDirection values. The default is Input.




Exception Type Condition
ArgumentException 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.


[Visual Basic, C#, C++] The following example creates an OdbcParameter and sets some of its properties.

[Visual Basic] 
Public Sub CreateMyProc(myConnection As OdbcConnection)

    Dim myCommand As OdbcCommand = myConnection.CreateCommand()
    myCommand.CommandText = { call MyProc(?,?,?) }

    myCommand.Parameters.Add("", OdbcType.Int).Value = 1
    myCommand.Parameters.Add("", OdbcType.Decimal).Value = 2
    myCommand.Parameters.Add("", OdbcType.Decimal).Value = 3

End Sub ' CreateMyProc

public void CreateMyProc(OdbcConnection myConnection) 
    OdbcCommand myCommand = myConnection.CreateCommand();
    myCommand.CommandText = "{ call MyProc(?,?,?) }";

    myCommand.Parameters.Add("", OdbcType.Int).Value = 1;
    myCommand.Parameters.Add("", OdbcType.Decimal).Value = 2;
    myCommand.Parameters.Add("", OdbcType.Decimal).Value = 3;

void CreateMyProc(OdbcConnection* myConnection) 
    OdbcCommand* myCommand = myConnection->CreateCommand();
    myCommand->CommandText = S"{ call MyProc(?,?,?) }";

    myCommand->Parameters->Add(S"", OdbcType::Int)->Value = __box(1);
    myCommand->Parameters->Add(S"", OdbcType::Decimal)->Value = __box(2);
    myCommand->Parameters->Add(S"", OdbcType::Decimal)->Value = __box(3);

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

OdbcParameter Class | OdbcParameter Members | System.Data.Odbc Namespace

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