Muokkaa

Jaa

OdbcParameter.Direction Property

  • Reference

Definition

Namespace:
System.Data.Odbc
Assembly:
System.Data.Odbc.dll
Assembly:
System.Data.dll
Package:
System.Data.Odbc v9.0.0
Source:
OdbcParameterHelper.cs
Source:
OdbcParameterHelper.cs
Source:
OdbcParameterHelper.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:
 property System::Data::ParameterDirection Direction { System::Data::ParameterDirection get(); void set(System::Data::ParameterDirection value); };
public override System.Data.ParameterDirection Direction { get; set; }
public System.Data.ParameterDirection Direction { get; set; }
member this.Direction : System.Data.ParameterDirection with get, set
Public Overrides Property Direction As ParameterDirection
Public 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 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  

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;  
}

Remarks

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.

Applies to

See also