ImageValueConverter.ConvertToStorageType(Object) Method

Converts the persistent property’s value to the specified type.

Namespace: DevExpress.Xpo.Metadata

Assembly: DevExpress.Xpo.v19.2.dll

Declaration

C#

public override object ConvertToStorageType(
    object value
)

VB.NET

Public Overrides Function ConvertToStorageType(
    value As Object
) As Object

Parameters

Name	Type	Description
value	Object	An object which represents the value to convert.

Returns

Type	Description
Object	An object which represents the converted value. null (Nothing in Visual Basic) if the specified value is a null reference.

Remarks

The ConvertToStorageType method converts the specified value to the type which is specified by the ImageValueConverter.StorageType property. If this method cannot convert the specified object to the destination type, it throws a NotSupportedException exception.

Example

The following example shows how to convert the value of the Image property to an array of bytes when saving it in a data store.

C#

using DevExpress.Xpo;

public class SampleImageClass : XPObject {
    private System.Drawing.Image image;
    public SampleImageClass(Session session) : base(session) {}

    [ValueConverter(typeof(DevExpress.Xpo.Metadata.ImageValueConverter))]
    public System.Drawing.Image Image {
        get { return image; }
        set {
            SetPropertyValue(nameof(Image) , ref image, value);
        }
    }
}

VB.NET

Imports DevExpress.Xpo

Public Class SampleImageClass
    Inherits XPObject
    Private image_Renamed As System.Drawing.Image
    Public Sub New(ByVal session As Session)
        MyBase.New(session)
    End Sub

    <ValueConverter(GetType(DevExpress.Xpo.Metadata.ImageValueConverter))> _
    Public Property Image() As System.Drawing.Image
        Get
            Return image_Renamed
        End Get
        Set(ByVal value As System.Drawing.Image)
            SetPropertyValue(NameOf(Image), image_Renamed, value)
        End Set
    End Property
End Class