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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.

Implements

IDataParameter.IsNullable

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

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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