SqlParameter.IsNullable Property

Reference

Definition

Namespace:: System.Data.SqlClient

Assembly:: System.Data.SqlClient.dll

Assembly:: System.Data.dll

Assemblies:: netstandard.dll, System.Data.SqlClient.dll

Package:: System.Data.SqlClient v4.8.6

Important

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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.

public:
 virtual property bool IsNullable { bool get(); void set(bool value); };

public:
 property bool IsNullable { bool get(); void set(bool value); };

public override bool IsNullable { get; set; }

[System.ComponentModel.Browsable(false)]
[System.Data.DataSysDescription("DataParameter_IsNullable")]
public bool IsNullable { get; set; }

member this.IsNullable : bool with get, set

[<System.ComponentModel.Browsable(false)>]
[<System.Data.DataSysDescription("DataParameter_IsNullable")>]
member this.IsNullable : bool with get, set

Public Overrides Property IsNullable As Boolean

Public Property IsNullable As Boolean

Property Value

Boolean

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

Attributes: BrowsableAttribute DataSysDescriptionAttribute

Examples

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;
}

Private Sub CreateSqlParameterNullable()
    Dim parameter As New SqlParameter("Description", SqlDbType.VarChar, 88)
    parameter.IsNullable = True
    parameter.Direction = ParameterDirection.Output
End Sub

Remarks

Null values are handled using the DBNull class.

Applies to

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