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IDataParameter.Direction Property

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

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

ParameterDirection Direction { get; set; }

Property Value

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

ExceptionCondition
ArgumentException

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

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

After the last row from the last resultset is read, Output, InputOut, and ReturnValue parameters are updated.

The following example creates an instance of the implementing class, SqlParameter, and sets some of its properties.


public void CreateSqlParameter() 
{
    SqlParameter parameter = new SqlParameter(
        "@Description", SqlDbType.VarChar);
    parameter.Direction = ParameterDirection.Output;
}


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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.
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