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DbParameter.Direction Property

.NET Framework 4

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.Common
Assembly: System.Data (in System.Data.dll)

Syntax

C++

Copy

public abstract ParameterDirection Direction { get; set; }

Property Value

Type: System.Data.ParameterDirection
One of the ParameterDirection values. The default is Input.

Implements

IDataParameter.Direction

Exceptions

Exception	Condition
ArgumentException	The property is not set to one of the valid ParameterDirection values.

Remarks

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

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

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

Reference

DbParameter Class

System.Data.Common Namespace

Other Resources

ADO.NET Managed Providers and DataSet Developer Center

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