SqlParameter.IsNullable Property

Reference

Definition

Namespace:: System.Data.SqlClient

Assembly:: System.Data.SqlClient.dll

Assembly:: System.Data.dll

Package:: System.Data.SqlClient v4.9.0

Source:: System.Data.SqlClient.notsupported.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

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

Product	Versions
.NET	Core 1.0, Core 1.1, 6 (package-provided), 7 (package-provided), 8 (package-provided), 9 (package-provided), 10 (package-provided)
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0 (package-provided)

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