OleDbParameter.IsNullable Property

Reference

Definition

Namespace:: System.Data.OleDb

Assembly:: System.Data.OleDb.dll

Assembly:: System.Data.dll

Package:: System.Data.OleDb v8.0.1

Package:: System.Data.OleDb v9.0.0-rc.2.24473.5

Source:: DbParameterHelper.cs

Source:: DbParameterHelper.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.

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 an OleDbParameter and sets some of its properties.

Public Sub CreateOleDbParameter()  
    Dim parameter As New OleDbParameter("Description", OleDbType.VarChar, 88)  
    parameter.IsNullable = True  
    parameter.Direction = ParameterDirection.Output  
End Sub 'CreateOleDbParameter

public void CreateOleDbParameter()   
 {  
    OleDbParameter parameter = new OleDbParameter("Description", OleDbType.VarChar, 88);  
    parameter.IsNullable = true;  
    parameter.Direction = ParameterDirection.Output;  
 }

Remarks

Null values are handled using the DBNull class.

Applies to

Product	Versies
.NET	6 (package-provided), 7 (package-provided), 8 (package-provided), 9 (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 (package-provided), 4.7, 4.7.1 (package-provided), 4.7.1, 4.7.2 (package-provided), 4.7.2, 4.8 (package-provided), 4.8, 4.8.1
.NET Standard	2.0 (package-provided)

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