Direction Property

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 Overrides Property Direction As ParameterDirection

Property Value

Type: System.Data.ParameterDirection

One of the ParameterDirection values. The default is Input.

Exception Condition

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.

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

.NET Framework
Available since 1.1
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