IsNullable Property

SqlParameter.IsNullable Property


Gets or sets a value that indicates whether the parameter accepts null values. IsNullable is not used to validate the parameter’s value and will not prevent sending or receiving a null value when executing a command.

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

public override bool IsNullable { get; set; }

Property Value

Type: System.Boolean

true if null values are accepted; otherwise false. The default is false.

Null values are handled using the DBNull class.

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

static void CreateSqlParameterNullable()
    SqlParameter parameter = new SqlParameter("Description", SqlDbType.VarChar, 88);
    parameter.IsNullable = true;
    parameter.Direction = ParameterDirection.Output;

.NET Framework
Available since 1.1
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