SqlParameter Constructor (String, SqlDbType, Int32, String)

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


Type: System.String
The name of the parameter to map.
Type: System.Data.SqlDbType
One of the SqlDbType values.
Type: System.Int32
The length of the parameter.
Type: System.String
The name of the source column.


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;


.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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