ImageValueConverter Class

A Value Converter which can be used to convert Image objects to an array of bytes.

Namespace: DevExpress.Xpo.Metadata

Assembly: DevExpress.Xpo.v20.1.dll

NuGet Packages: DevExpress.WindowsDesktop.Xpo, DevExpress.Xpo

Declaration

C#

public class ImageValueConverter :
    ValueConverter

VB.NET

Public Class ImageValueConverter
    Inherits ValueConverter

Remarks

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

If ImageValueConverter is not available under the target platform (for example, .NET Core), change the property type to System.Byte[].

C#

using DevExpress.Xpo;

[Delayed]
public byte[] Image {
    get { return GetDelayedPropertyValue(nameof(Image)); }
    set { SetDelayedPropertyValue<byte[]>(nameof(Image), value); }
}

VB.NET

Imports DevExpress.Xpo

<Delayed>
Public Property Image() As Byte()
    Get
        Return GetDelayedPropertyValue(NameOf(Image))
    End Get
    Set(ByVal value As Byte())
        SetDelayedPropertyValue(Of Byte())(NameOf(Image), value)
    End Set
End Property

Inheritance

Object

ValueConverter

ImageValueConverter