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SqlParameter Constructor (String, SqlDbType)

Initializes a new instance of the SqlParameter class that uses the parameter name and the data type.

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

public SqlParameter (
	string parameterName,
	SqlDbType dbType
public SqlParameter (
	String parameterName, 
	SqlDbType dbType
public function SqlParameter (
	parameterName : String, 
	dbType : SqlDbType



The name of the parameter to map.


One of the SqlDbType values.

Exception typeCondition


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

The data type and, if appropriate, Size and Precision are inferred from the value of the dbType parameter.

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

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


Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0