OleDbParameter.Direction Property

Definition

Namespace:

System.Data.OleDb

Assembly:

System.Data.OleDb.dll

Package:

System.Data.OleDb v9.0.0-rc.2.24473.5

Source:

DbParameterHelper.cs

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

public:
 virtual property System::Data::ParameterDirection Direction { System::Data::ParameterDirection get(); void set(System::Data::ParameterDirection value); };

public override System.Data.ParameterDirection Direction { get; set; }

member this.Direction : System.Data.ParameterDirection with get, set

Public Overrides Property Direction As ParameterDirection

Property Value

ParameterDirection

One of the ParameterDirection values. The default is Input.

Implements

Direction

Exceptions

ArgumentException

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

Examples

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

Public Sub CreateOleDbParameter()  
    Dim parameter As New OleDbParameter("Description", OleDbType.VarChar, 88)  
    parameter.Direction = ParameterDirection.Output  
End Sub 'CreateOleDbParameter  

public void CreateOleDbParameter()   
 {  
    OleDbParameter parameter = new OleDbParameter("Description", OleDbType.VarChar, 88);  
    parameter.Direction = ParameterDirection.Output;  
 }  

Remarks

If the ParameterDirection is output, and execution of the associated OleDbCommand does not return a value, the OleDbParameter contains a null value.

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

See also

• Working with Commands