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SqlParameter Constructor (String, SqlDbType, Int32, String)

Initializes a new instance of the SqlParameter class that uses the parameter name, the SqlDbType, the size, and the source column name.

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

public SqlParameter(
	string parameterName,
	SqlDbType dbType,
	int size,
	string sourceColumn
)

Parameters

parameterName
Type: System.String

The name of the parameter to map.

dbType
Type: System.Data.SqlDbType

One of the SqlDbType values.

size
Type: System.Int32

The length of the parameter.

sourceColumn
Type: System.String

The name of the source column (SourceColumn) if this SqlParameter is used in a call to Update.

ExceptionCondition
ArgumentException

The value supplied in the dbType parameter is an invalid back-end data type.

The Size is inferred from the value of the dbType parameter if it is not explicitly set in the size parameter.

The following example creates a SqlParameter and sets some of its properties.

private static void AddSqlParameter(SqlCommand command)
{
    SqlParameter parameter = new SqlParameter("@Description", 
        SqlDbType.VarChar, 88, "Description");
    parameter.IsNullable = true;
    parameter.Direction = ParameterDirection.Output;

    command.Parameters.Add(parameter);
}

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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